/*
This Source Code Form is subject to the
terms of the Mozilla Public License, v.
2.0. If a copy of the MPL was not
distributed with this file, You can
obtain one at
http://mozilla.org/MPL/2.0/.
*/

#include "stdafx.h"
#include "application/editormode.h"
#include "editor/editorSettings.hpp"
#include "editor/editorGeometry.hpp"
#include "application/application.h"
#include "application/editoruilayer.h"
#include "application/editorprojection.h"

#include "simulation/simulation.h"
#include "simulation/simulationtime.h"
#include "scene/scenelayers.h"
#include "utilities/Globals.h"
#include "utilities/Logs.h"
#include "world/Track.h"
#include "world/MemCell.h"
#include "world/Event.h"
#include "vehicle/DynObj.h"
#include "model/AnimModel.h"
#include "model/Model3d.h"
#include "rendering/renderer.h"
#include "world/Sweep.h"
#include "input/keyboardinput.h"
#include "launcher/textures_scanner.h"
#include <glm/gtc/matrix_transform.hpp>
#include <glm/gtc/type_ptr.hpp>
#include <algorithm>
#include "editor/editorFormat.hpp"
#include "editor/editorAlignmentStore.hpp"
#include "editor/editorSwitchStore.hpp"
#include "scene/sceneterrain.h"
#include "editor/editorSpeed.hpp"

#include <cstdint>
#include <cstdlib>
#include <fstream>
#include <map>
#include <sstream>

editor_mode::selftest_result editor_mode::selftest_dispatch(std::string const &command, std::istringstream &words)
{
	for (auto const group : {&editor_mode::selftest_scene, &editor_mode::selftest_sweep, &editor_mode::selftest_track, &editor_mode::selftest_switch, &editor_mode::selftest_join, &editor_mode::selftest_signal, &editor_mode::selftest_terrain})
		if (auto const result{(this->*group)(command, words)}; result != selftest_result::unhandled)
			return result;
	return selftest_result::unhandled;
}

editor_mode::selftest_result editor_mode::selftest_scene(std::string const &command, std::istringstream &words)
{
	auto &test{m_selftest};
	if (command == "camera")
	{
		glm::dvec3 from;
		glm::dvec3 to;
		words >> from.x >> from.y >> from.z >> to.x >> to.y >> to.z;
		auto const look{glm::normalize(to - from)};
		Camera.Pos = from;
		Camera.Angle = glm::vec3(static_cast<float>(std::asin(std::clamp(look.y, -1.0, 1.0))), static_cast<float>(std::atan2(-look.x, -look.z)), 0.0f);
		Global.pCamera = Camera;
		m_focus_active = false;
		return selftest_result::handled;
	}
	if (command == "select")
	{
		std::string name;
		words >> name;
		m_node = simulation::Paths.find(name);
		m_track_point = {};
		ui()->set_node(m_node);
		WriteLog("SELFTEST select " + name + (m_node != nullptr ? "" : ": no such track"));
		return selftest_result::handled;
	}
	if (command == "frames")
	{
		std::string name;
		double from{0.0};
		double to{0.0};
		double step{0.1};
		words >> name >> from >> to >> step;
		auto *sweep{simulation::Sweeps.find(name)};
		if (sweep == nullptr)
			return selftest_result::handled;
		auto const side{sweep->definition().lateral >= 0.0 ? 1 : 0};
		if (step <= 0.0)
			return selftest_result::handled;
		for (int i = 0; from + i * step <= to + 1e-9; ++i)
		{
			auto const station{from + i * step};
			auto const at{sweep->frame_at(station)};
			WriteLog(format("SELFTEST frame %s %.2f: %.3f %.3f %.3f widening %.4f cant %.4f setback %.4f", name.c_str(), station, at.position.x, at.position.y, at.position.z, at.widening[side], at.cant[side], sweep->setback(at)));
		}
		return selftest_result::handled;
	}
	if (command == "weather")
	{
		auto const &time{simulation::Time.data()};
		WriteLog(format("SELFTEST weather: %02d:%02d, fog end %.0f m, overcast %.2f", time.wHour, time.wMinute, Global.fFogEnd, Global.Overcast));
		return selftest_result::handled;
	}
	if (command == "projtest")
	{
		screen_projection const projection;
		for (std::size_t i = 0; i < m_sweep.outline.size() && i < 45; i += 4)
		{
			ImVec2 screen;
			auto const shown{projection.project(m_sweep.outline[i], screen)};
			auto const clip{projection.clip(m_sweep.outline[i])};
			WriteLog(format("SELFTEST proj %zu: %.1f %.1f %.1f -> %d %.0f %.0f w %.2f", i, m_sweep.outline[i].x, m_sweep.outline[i].y, m_sweep.outline[i].z, shown ? 1 : 0, screen.x, screen.y, clip.w));
		}
		return selftest_result::handled;
	}
	if (command == "newscenery")
	{
		WriteLog(restart_for_new_scenery() ? "SELFTEST newscenery: started" : "SELFTEST newscenery: failed");
		return selftest_result::pause;
	}
	if (command == "vehicles")
	{
		for (auto *vehicle : simulation::Vehicles.sequence())
		{
			if (vehicle == nullptr)
				continue;
			auto const head{vehicle->HeadPosition()};
			auto const front{vehicle->VectorFront()};
			auto const coupler = [&](int const End) {
				auto const &coupler{vehicle->MoverParameters->Couplers[End]};
				return coupler.Connected != nullptr ? coupler.Connected->Name + "/" + std::to_string(coupler.CouplingFlag) : std::string{"-"};
			};
			WriteLog(format("SELFTEST vehicle %s head %.2f %.2f front %.2f %.2f dir %d coupler0 %s coupler1 %s", vehicle->name().c_str(), head.x, head.z, front.x, front.z, vehicle->iDirection, coupler(0).c_str(), coupler(1).c_str()));
		}
		return selftest_result::handled;
	}
	if (command == "screenshot")
	{
		Application.queue_screenshot();
		test.wait = 3;
		return selftest_result::pause;
	}
	if (command == "save")
	{
		save();
		return selftest_result::handled;
	}
	if (command == "ortho")
	{
		float extent{0.0f};
		words >> extent;
		choose_work_area(work_area::tracks);
		if (false == Global.EditorOrtho)
			toggle_ortho();
		if (extent > 0.0f)
			Global.EditorOrthoExtent = std::clamp(extent, 5.0f, 50000.0f);
		WriteLog(format("SELFTEST ortho extent %.0f", Global.EditorOrthoExtent));
		return selftest_result::handled;
	}
	if (command == "mapstate")
	{
		auto const marked{scene::Layers.empty() ? std::vector<std::string>{} : scene::Layers.marked(scene::layer_handle{1}, "//$o")};
		WriteLog(format("SELFTEST mapstate orthophoto %d top %d extent %.0f mark %s", m_orthophoto.enabled() ? 1 : 0, Global.EditorOrtho ? 1 : 0, Global.EditorOrthoExtent, marked.empty() ? "-" : marked.front().c_str()));
		return selftest_result::handled;
	}
	if (command == "trainset")
	{
		std::string name;
		std::string vehicle;
		std::string skin;
		int facing{1};
		words >> name >> vehicle >> skin >> facing >> m_vehicle.velocity;
		auto *track{simulation::Paths.find(name)};
		if (track == nullptr)
			return selftest_result::handled;
		auto desc{std::make_shared<ui::vehicle_desc>()};
		desc->path = vehicle;
		auto set{std::make_shared<ui::skin_set>()};
		set->skin = skin;
		m_vehicle.consist.clear();
		m_vehicle.vehicle = desc;
		m_vehicle.skin = set;
		vehicle_start(*track, geometry::bezier{track->m_paths.front()}.point(0.5));
		m_vehicle.facing = facing;
		auto const placed{vehicle_place()};
		WriteLog(format("SELFTEST trainset %s placed %d pending %d: %s", name.c_str(), placed ? 1 : 0, static_cast<int>(m_vehicle.trainsets.size()), m_vehicle.status.c_str()));
		return selftest_result::handled;
	}
	if (command == "selectmodel")
	{
		glm::dvec3 point{0.0};
		words >> point.x >> point.z;
		TAnimModel *nearest{nullptr};
		auto best{50.0};
		for (auto *model : simulation::Instances.sequence())
		{
			if (model == nullptr)
				continue;
			auto const distance{glm::length(glm::dvec2{model->location().x - point.x, model->location().z - point.z})};
			if (distance < best)
			{
				best = distance;
				nearest = model;
			}
		}
		m_node = nearest;
		select_include(0);
		ui()->set_node(m_node);
		WriteLog("SELFTEST selectmodel: " + (nearest != nullptr ? format("%s at %.2f %.2f %.2f", nearest->name().c_str(), nearest->location().x, nearest->location().y, nearest->location().z) : std::string{"none"}));
		return selftest_result::handled;
	}
	if (command == "addmodel")
	{
		glm::dvec3 point{0.0};
		words >> point.x >> point.z;
		TAnimModel *nearest{nullptr};
		auto best{50.0};
		for (auto *model : simulation::Instances.sequence())
		{
			if (model == nullptr)
				continue;
			auto const distance{glm::length(glm::dvec2{model->location().x - point.x, model->location().z - point.z})};
			if (distance < best)
			{
				best = distance;
				nearest = model;
			}
		}
		select_node(nearest, true);
		WriteLog("SELFTEST addmodel: " + (nearest != nullptr ? format("%s at %.2f %.2f %.2f", nearest->name().c_str(), nearest->location().x, nearest->location().y, nearest->location().z) : std::string{"none"}));
		return selftest_result::handled;
	}
	if (command == "selection")
	{
		std::string text;
		for (auto *node : selection_with_groups())
			text += format(" [%s %.2f %.2f %.2f group %d]", node->name().c_str(), node->location().x, node->location().y, node->location().z, static_cast<int>(node->group()));
		WriteLog("SELFTEST selection:" + text);
		return selftest_result::handled;
	}
	if (command == "moveselection" && m_node != nullptr)
	{
		glm::dvec3 offset{0.0};
		words >> offset.x >> offset.y >> offset.z;
		selection_snapshots(EditorSnapshot::Action::Move);
		auto const before{m_node->location()};
		m_editor.translate(m_node, before + offset, true);
		selection_follow(m_node->location() - before, glm::vec3(0.0f), m_node->location());
		return selftest_result::handled;
	}
	if (command == "turnselection" && m_node != nullptr)
	{
		float degrees{0.0f};
		words >> degrees;
		selection_snapshots(EditorSnapshot::Action::Rotate);
		glm::vec3 const turned{0.0f, degrees, 0.0f};
		m_editor.rotate(m_node, turned, 0.0f);
		selection_follow(glm::dvec3(0.0), turned, m_node->location());
		return selftest_result::handled;
	}
	if (command == "copy")
	{
		copy_selection();
		return selftest_result::handled;
	}
	if (command == "paste")
	{
		glm::dvec3 point{0.0};
		words >> point.x >> point.y >> point.z;
		paste_clipboard(point);
		return selftest_result::handled;
	}
	if (command == "group")
	{
		group_selection();
		return selftest_result::handled;
	}
	if (command == "ungroup")
	{
		ungroup_selection();
		return selftest_result::handled;
	}
	if (command == "drop")
	{
		drop_selection_to_ground();
		return selftest_result::handled;
	}
	if (command == "delete")
	{
		delete_selected();
		return selftest_result::handled;
	}
	if (command == "selectinclude")
	{
		glm::dvec3 point{0.0};
		words >> point.x >> point.z;
		scene::instance_handle nearest{0};
		auto best{50.0};
		m_node = nullptr;
		for (scene::instance_handle instance = 1; instance <= scene::Layers.instance_count(); ++instance)
		{
			if (false == scene::Layers.removable(instance))
				continue;
			select_include(instance);
			bend_source source;
			if (false == bend_source_of_selection(source))
				continue;
			auto const at{glm::dvec3(source.transform[3])};
			auto const distance{glm::length(glm::dvec2{at.x - point.x, at.z - point.z})};
			if (distance < best)
			{
				best = distance;
				nearest = instance;
			}
		}
		select_include(nearest);
		WriteLog("SELFTEST selectinclude: " + (nearest != 0 ? *scene::Layers.instance(nearest).file : std::string{"none"}));
		return selftest_result::handled;
	}
	if (command == "modelbox")
	{
		auto *model{dynamic_cast<TAnimModel *>(m_node)};
		bend_source source;
		if (model == nullptr || false == bend_source_of_selection(source))
		{
			WriteLog("SELFTEST modelbox: no model selected");
			return selftest_result::handled;
		}
		scene::node_data data;
		sweep_node probe{data};
		sweep_node::state state;
		state.model = source.file;
		state.skin = source.skin;
		state.scale = source.scale;
		probe.define(state);
		glm::dvec3 boxlow{std::numeric_limits<double>::max()};
		glm::dvec3 boxhigh{-std::numeric_limits<double>::max()};
		for (auto const &item : probe.items())
		{
			auto const transform{source.transform * glm::scale(glm::dmat4(1.0), source.scale) * item.transform};
			std::vector<TSubModel *> pending{item.model->GetSMRoot()};
			while (false == pending.empty())
			{
				auto *submodel{pending.back()};
				pending.pop_back();
				for (; submodel != nullptr; submodel = submodel->Next)
				{
					if (submodel->Child != nullptr)
						pending.push_back(submodel->Child);
					if (submodel->eType != GL_TRIANGLES || submodel->fSquareMinDist > 0.f || (submodel->m_geometry.handle.bank == 0 && submodel->m_geometry.handle.chunk == 0))
						continue;
					glm::dmat4 local{1.0};
					for (auto *parent = submodel; parent != nullptr; parent = parent->Parent)
						if ((parent->iFlags & 0xC000) != 0 && parent->GetMatrix() != nullptr)
							local = glm::dmat4(glm::make_mat4(parent->GetMatrix()->readArray())) * local;
					for (auto const &vertex : GfxRenderer->Vertices(submodel->m_geometry.handle))
					{
						auto const world{glm::dvec3(transform * local * glm::dvec4(glm::dvec3(vertex.position), 1.0))};
						boxlow = glm::min(boxlow, world);
						boxhigh = glm::max(boxhigh, world);
					}
				}
			}
		}
		WriteLog(format("SELFTEST modelbox: %.2f %.2f %.2f - %.2f %.2f %.2f", boxlow.x, boxlow.y, boxlow.z, boxhigh.x, boxhigh.y, boxhigh.z));
		return selftest_result::handled;
	}
	if (command == "key")
	{
		std::string key;
		std::string action;
		std::string mods;
		words >> key >> action >> mods;
		if (key == "RMB")
			m_input.mouse.button(GLFW_MOUSE_BUTTON_RIGHT, action == "press" ? GLFW_PRESS : GLFW_RELEASE);
		else
		{
			auto const code{key == "S" ? GLFW_KEY_S : key == "W" ? GLFW_KEY_W : key == "CTRL" ? GLFW_KEY_LEFT_CONTROL : 0};
			on_key(code, 0, action == "press" ? GLFW_PRESS : GLFW_RELEASE, mods == "ctrl" ? GLFW_MOD_CONTROL : 0);
		}
		WriteLog(format("SELFTEST key %s %s %s: camera %.2f %.2f %.2f, key S %d, right button %d", key.c_str(), action.c_str(), mods.c_str(), Camera.Pos.x, Camera.Pos.y, Camera.Pos.z, static_cast<int>(input::keys[GLFW_KEY_S]), m_input.mouse.button(GLFW_MOUSE_BUTTON_RIGHT)));
		return selftest_result::handled;
	}
	if (command == "event")
	{
		std::string name;
		words >> name;
		auto *event{simulation::Events.FindEvent(name)};
		if (event != nullptr)
			simulation::Events.AddToQuery(event, nullptr);
		WriteLog("SELFTEST event " + name + (event != nullptr ? " queued" : ": no such event"));
		return selftest_result::handled;
	}
	if (command == "memcell")
	{
		std::string name;
		words >> name;
		auto *cell{simulation::Memory.find(name)};
		WriteLog("SELFTEST memcell " + name + (cell != nullptr ? format(": %s %.1f %.1f", cell->Text().c_str(), cell->Value1(), cell->Value2()) : std::string{": none"}));
		return selftest_result::handled;
	}
	if (command == "newscenerypopup")
	{
		m_newscenery_asked = true;
		return selftest_result::handled;
	}
	if (command == "openscenerypopup")
	{
		m_openscenery_asked = true;
		std::snprintf(m_openscenery_search, sizeof(m_openscenery_search), "%s", "zz_");
		return selftest_result::handled;
	}
	if (command == "openscenery")
	{
		std::string name;
		words >> name;
		WriteLog(restart_editor(name) ? "SELFTEST openscenery: started " + name : "SELFTEST openscenery: failed");
		return selftest_result::handled;
	}
	if (command == "undo")
	{
		undo_last();
		WriteLog("SELFTEST undo");
		return selftest_result::handled;
	}
	if (command == "redo")
	{
		redo_last();
		WriteLog("SELFTEST redo");
		return selftest_result::handled;
	}
	if (command == "log")
	{
		std::string text;
		std::getline(words, text);
		WriteLog("SELFTEST" + text);
		return selftest_result::handled;
	}
	return selftest_result::unhandled;
}

editor_mode::selftest_result editor_mode::selftest_sweep(std::string const &command, std::istringstream &words)
{
	if (command == "sweep")
	{
		std::map<std::string, std::string> values;
		std::string pair;
		while (words >> pair)
		{
			auto const equals{pair.find('=')};
			if (equals != std::string::npos)
				values[pair.substr(0, equals)] = pair.substr(equals + 1);
		}
		auto &tool{m_sweep};
		auto const get = [&](char const *Key, std::string const &Default) { auto const found{values.find(Key)}; return found != values.end() ? found->second : Default; };
		tool.edited = nullptr;
		tool.curve_for = nullptr;
		std::snprintf(tool.model, sizeof(tool.model), "%s", get("model", "").c_str());
		tool.parameters.clear();
		std::stringstream parameters(get("params", ""));
		std::string parameter;
		while (std::getline(parameters, parameter, ','))
		{
			tool.parameters.emplace_back();
			std::snprintf(tool.parameters.back().data(), tool.parameters.back().size(), "%s", parameter.c_str());
		}
		tool.parameters_for = tool.model;
		auto &settings{tool.settings};
		settings.lateral = std::stod(get("lateral", "0"));
		settings.height = std::stod(get("height", "0"));
		auto const side{get("side", "origin")};
		settings.side_anchor = side == "near" ? 1 : side == "far" ? 2 : side == "centre" ? 3 : 0;
		auto const top{get("top", "origin")};
		settings.height_anchor = top == "bottom" ? 1 : top == "top" ? 2 : top == "edge" ? 3 : 0;
		settings.bend = get("mode", "bend") != "repeat";
		settings.step = std::stod(get("step", "0"));
		settings.widen = get("widen", "0") == "1";
		settings.platform = get("platform", "0") == "1";
		settings.face = get("face", "1") == "1";
		settings.tilt = get("tilt", "0") == "1";
		settings.from = std::stod(get("from", "0"));
		settings.to = std::stod(get("to", "-1"));
		auto const length{get("length", "all")};
		tool.length_mode = length == "original" ? 0 : length == "all" ? 2 : 1;
		if (tool.length_mode == 1)
			tool.length = std::stod(length);
		if (values.count("edge"))
			EditorSettings.platform_edge(std::stod(values["edge"]));
		tool.measured.clear();
		tool.open = true;
		sweep_curve();
		sweep_measure();
		if (values.count("widen"))
			settings.widen = get("widen", "0") == "1";
		if (values.count("platform"))
			settings.platform = get("platform", "0") == "1";
		if (get("create", "1") == "1")
		{
			sweep_create();
			WriteLog("SELFTEST sweep: " + tool.status);
		}
		return selftest_result::handled;
	}
	if (command == "drag")
	{
		glm::dvec3 from{0.0};
		glm::dvec3 to{0.0};
		words >> from.x >> from.z >> to.x >> to.z;
		m_sweep.open = true;
		if (false == sweep_press_at(from, false))
		{
			WriteLog("SELFTEST drag: the press wasn't taken");
			return selftest_result::handled;
		}
		sweep_drag_at(to);
		sweep_release();
		WriteLog("SELFTEST drag: " + m_sweep.status);
		return selftest_result::handled;
	}
	if (command == "fouling")
	{
		std::map<std::string, std::string> values;
		std::string pair;
		while (words >> pair)
		{
			auto const equals{pair.find('=')};
			if (equals != std::string::npos)
				values[pair.substr(0, equals)] = pair.substr(equals + 1);
		}
		auto &tool{m_fouling};
		tool.scope = std::stoi(values.count("scope") ? values["scope"] : "2");
		tool.height_mode = values["mode"] == "ground" ? 0 : 1;
		tool.height = std::stod(values.count("height") ? values["height"] : "0");
		tool.dirty = true;
		fouling_update();
		WriteLog("SELFTEST fouling: " + tool.status);
		int shown{0};
		for (auto const &found : tool.found)
			if (found.wrong && shown++ < 5)
				WriteLog(format("SELFTEST fouling: %s %.2f m off, %+.3f m high", found.marker.file.c_str(), found.error, found.height_error));
		if (values["place"] == "1")
		{
			fouling_place();
			tool.dirty = true;
			fouling_update();
			WriteLog("SELFTEST fouling after placing: " + tool.status);
		}
		if (values["fix"] == "1")
		{
			fouling_fix();
			tool.dirty = true;
			fouling_update();
			WriteLog("SELFTEST fouling after the fix: " + tool.status);
		}
		return selftest_result::handled;
	}
	if (command == "hekto")
	{
		std::map<std::string, std::string> values;
		std::string pair;
		while (words >> pair)
		{
			auto const equals{pair.find('=')};
			if (equals != std::string::npos)
				values[pair.substr(0, equals)] = pair.substr(equals + 1);
		}
		auto *track{simulation::Paths.find(values["track"])};
		if (track == nullptr)
		{
			WriteLog("SELFTEST hekto: no such track");
			return selftest_result::handled;
		}
		hekto_start(*track, track->m_paths.front().points[segment_data::point::start]);
		auto &tool{m_hekto};
		tool.dirty = true;
		hekto_update();
		if (values.count("km"))
		{
			tool.km = std::stod(values["km"]);
			tool.growth = values["growth"] == "-1" ? -1 : 1;
		}
		tool.side = values["side"] == "alt" ? 0 : values["side"] == "left" ? -1 : 1;
		tool.dirty = true;
		hekto_update();
		auto const missing{std::count_if(tool.posts.begin(), tool.posts.end(), [](hekto_post const &Post) { return Post.standing < 0; })};
		WriteLog(format("SELFTEST hekto: km %.3f growth %d, %zu posts along %.0f m, %d to place, %zu standing. %s", tool.km, tool.growth, tool.posts.size(), tool.samples.empty() ? 0.0 : tool.samples.back().chainage, static_cast<int>(missing), tool.found.size(), tool.status.c_str()));
		for (std::size_t i = 0; i < tool.posts.size() && i < 4; ++i)
		{
			auto const &post{tool.posts[i]};
			double lateral;
			glm::dvec3 const axis{editor_track::sampled_position(tool.samples, post.chainage)};
			auto const direction{editor_track::sampled_position(tool.samples, post.chainage + 1.0) - axis};
			glm::dvec2 const offset{post.position.x - axis.x, post.position.z - axis.z};
			lateral = glm::length(offset);
			auto const right{(direction.x * offset.y - direction.z * offset.x) * tool.growth >= 0.0};
			WriteLog(format("SELFTEST hekto post %d.%d at %.1f m, %.2f m from the axis, %s of the growing kilometrage, at %.1f %.1f %.1f", post.hectometres / 10, post.hectometres % 10, post.chainage, lateral, right ? "right" : "left", post.position.x, post.position.y,
			                post.position.z));
		}
		if (values["place"] == "1")
		{
			hekto_place();
			WriteLog("SELFTEST hekto: " + tool.status);
		}
		return selftest_result::handled;
	}
	if (command == "spread")
	{
		std::string name;
		words >> name >> m_spread.stop >> m_spread.reach;
		if (auto *track{simulation::Paths.find(name)})
		{
			std::string names;
			for (auto const *other : track_spread_from(*track))
				names += ' ' + other->name();
			WriteLog("SELFTEST spread " + name + ":" + names + " | prev " + (track->trPrev ? track->trPrev->name() : std::string{"-"}) + " next " + (track->trNext ? track->trNext->name() : std::string{"-"}));
		}
		return selftest_result::handled;
	}
	if (command == "turntable")
	{
		glm::dvec3 centre{0.0};
		double yaw{0.0};
		words >> centre.x >> centre.y >> centre.z >> yaw;
		turntable_place(centre, yaw);
		for (double angle; words >> angle;)
		{
			m_turntable.heading = m_turntable.table_yaw + angle;
			m_turntable.exit_length = 10.0;
			track_intent intent;
			intent.what = track_intent::kind::turntable_exit;
			turntable_press(intent);
		}
		WriteLog("SELFTEST turntable: " + (m_turntable.error.empty() ? m_turntable.status : m_turntable.error));
		return selftest_result::handled;
	}
	if (command == "bend" || command == "bendset")
	{
		std::map<std::string, std::string> values;
		std::string pair;
		while (words >> pair)
		{
			auto const equals{pair.find('=')};
			if (equals != std::string::npos)
				values[pair.substr(0, equals)] = pair.substr(equals + 1);
		}
		auto const vector = [](std::string Text) {
			std::replace(Text.begin(), Text.end(), ',', ' ');
			std::istringstream numbers(Text);
			glm::dvec3 result{0.0};
			numbers >> result.x >> result.y >> result.z;
			return result;
		};
		auto const index = [](std::string const &Text, std::vector<std::string> const &Names) {
			return static_cast<int>(std::find(Names.begin(), Names.end(), Text) - Names.begin());
		};
		auto &tool{m_bend};
		auto const along{values.count("along") ? index(values["along"], {"start", "origin", "middle", "end", "point"}) : tool.along_anchor};
		auto const side{values.count("side") ? index(values["side"], {"origin", "near", "far", "middle", "point"}) : tool.side_anchor};
		auto const height{values.count("height") ? index(values["height"], {"origin", "bottom", "top", "edge", "point"}) : tool.height_anchor};
		auto const point{values.count("point") ? vector(values["point"]) : tool.point};
		if (command == "bend")
		{
			tool.edited = nullptr;
			tool.along_anchor = along;
			tool.side_anchor = side;
			tool.height_anchor = height;
			tool.point = point;
			tool.axis = values.count("axis") ? index(values["axis"], {"auto", "z", "x"}) : 0;
			tool.turned = values["turned"] == "1";
			bend_source source;
			if (false == bend_source_of_selection(source))
			{
				std::string reason;
				auto const editable{m_node != nullptr && scene::Layers.editable(m_node, &reason)};
				WriteLog(format("SELFTEST bend: nothing to bend (node %p template %d editable %d %s, instance %d)", static_cast<void *>(m_node), m_node != nullptr && m_node->from_template() ? 1 : 0, editable ? 1 : 0, reason.c_str(), static_cast<int>(m_instance)));
				return selftest_result::handled;
			}
			tool.tracks_for = nullptr;
			bend_find_tracks(glm::dvec3(source.transform[3]), source.model != nullptr ? static_cast<void const *>(source.model) : reinterpret_cast<void const *>(static_cast<std::uintptr_t>(source.instance)));
			tool.track = values.count("track") ? std::stoi(values["track"]) : 0;
			if (values.count("pick"))
				bend_pick(vector(values["pick"]));
			if (tool.tracks.empty())
			{
				WriteLog("SELFTEST bend: no track nearby");
				return selftest_result::handled;
			}
			sweep_node::state state;
			std::vector<TTrack *> tracks;
			bend_definition(source, *tool.tracks[tool.track].first, state, tracks);
			WriteLog(format("SELFTEST bend: track %s, %zu paths, anchor before %.3f %.3f %.3f, lateral %.3f height %.3f from %.3f to %.3f, axis %s flip %d; %s", tool.tracks[tool.track].first->name().c_str(), tracks.size(),
			                tool.marker.x, tool.marker.y, tool.marker.z, state.lateral, state.height, state.from, state.to, state.along_x ? "x" : "z", state.flip ? 1 : 0, tool.status.c_str()));
			if (values["go"] == "1")
			{
				bend_selection();
				WriteLog("SELFTEST bend: " + tool.status);
			}
		}
		else if (auto *sweep{tool.edited})
		{
			auto state{sweep->definition()};
			tool.along_anchor = along;
			if (side != tool.side_anchor || height != tool.height_anchor || point != tool.point)
			{
				tool.side_anchor = side;
				tool.height_anchor = height;
				tool.point = point;
				bend_reanchor(state, side, height, point);
			}
			if (values.count("lateral"))
				state.lateral = std::stod(values["lateral"]);
			if (values.count("up"))
				state.height = std::stod(values["up"]);
			if (values.count("widen"))
				state.widen = values["widen"] == "1";
			if (values.count("pick"))
			{
				bend_pick(vector(values["pick"]));
				state = sweep->definition();
			}
			if (values.count("length"))
			{
				bend_stretch(*sweep, bend_fixed(*sweep, state.point), std::stod(values["length"]), state.point, state);
			}
			bend_edit(state);
			WriteLog("SELFTEST bendset done");
		}
		return selftest_result::handled;
	}
	if (command == "bendprobe")
	{
		auto *sweep{m_bend.edited};
		if (sweep == nullptr)
		{
			WriteLog("SELFTEST bendprobe: nothing bent");
			return selftest_result::handled;
		}
		glm::dvec3 low;
		glm::dvec3 high;
		glm::dvec3 shift;
		sweep->bounds(low, high, shift);
		auto const &state{sweep->definition()};
		auto const marker{bend_marker(*sweep)};
		glm::dvec3 boxlow{std::numeric_limits<double>::max()};
		glm::dvec3 boxhigh{-std::numeric_limits<double>::max()};
		std::size_t vertices{0};
		for (auto const &shape : sweep->create_shapes())
			for (auto const &vertex : shape.data().vertices)
			{
				boxlow = glm::min(boxlow, vertex.position);
				boxhigh = glm::max(boxhigh, vertex.position);
				++vertices;
			}
		WriteLog(format("SELFTEST bendprobe %s: stations %.3f - %.3f, along the reference line %.3f m, model %.3f m, lateral %.3f height %.3f anchors %d/%d point %.3f %.3f %.3f, marker %.3f %.3f %.3f, box %.2f %.2f %.2f - %.2f %.2f %.2f, %zu vertices, removed %d",
		                sweep->name().c_str(), sweep->start(), sweep->end(), sweep->distance_at(sweep->end()) - sweep->distance_at(sweep->start()), high.x - low.x, state.lateral, state.height, state.side_anchor, state.height_anchor, state.point.x,
		                state.point.y, state.point.z, marker.x, marker.y, marker.z, boxlow.x, boxlow.y, boxlow.z, boxhigh.x, boxhigh.y, boxhigh.z, vertices, sweep->m_editorremoved ? 1 : 0));
		return selftest_result::handled;
	}
	if (command == "lineside")
	{
		std::string tab;
		words >> tab;
		show_track_tab(tab == "parallel" ? track_tab::parallel : track_tab::lineside);
		(tab == "vehicle" ? m_vehicle.expand : tab == "hekto" ? m_hekto.expand : tab == "fouling" ? m_fouling.expand : m_parallel.expand) = true;
		return selftest_result::handled;
	}
	if (command == "bendpanel")
	{
		ui()->expand_bend();
		return selftest_result::handled;
	}
	if (command == "gauge")
	{
		std::string name;
		words >> name;
		if (auto *track{simulation::Paths.find(name)})
		{
			scan_gauge(*track);
			WriteLog(format("SELFTEST gauge %s: %d hits", name.c_str(), static_cast<int>(m_gauge.line.hits.size())));
			for (auto const &hit : m_gauge.line.hits)
				WriteLog(format("SELFTEST gauge hit %s depth %.3f at %.2f %.2f %.2f", hit.model.c_str(), hit.depth, hit.point.x, hit.point.y, hit.point.z));
		}
		else
			WriteLog("SELFTEST gauge " + name + ": no such track");
		return selftest_result::handled;
	}
	if (command == "ttincludes")
	{
		std::string name;
		words >> name;
		auto const *track{simulation::Paths.find(name)};
		WriteLog(format("SELFTEST ttincludes %s: track %s, includes %d", name.c_str(), track == nullptr ? "none" : track->m_editorremoved ? "removed" : "present",
		                track != nullptr ? static_cast<int>(turntable_includes(*track).size()) : -1));
		return selftest_result::handled;
	}
	if (command == "checkspans")
	{
		WriteLog("SELFTEST spans: " + scene::Layers.check_sources());
		return selftest_result::handled;
	}
	return selftest_result::unhandled;
}

editor_mode::selftest_result editor_mode::selftest_track(std::string const &command, std::istringstream &words)
{
	if (command == "probe")
	{
		// edge of the last laid model as it was made: its distance from the axis and the height of its top over the rail head
		std::string name;
		double step{20.0};
		words >> name >> step;
		if (name == "-")
			name.clear();
		auto *sweep{name.empty() ? m_sweep.edited : simulation::Sweeps.find(name)};
		if (sweep == nullptr)
		{
			WriteLog("SELFTEST probe: nothing laid");
			return selftest_result::handled;
		}
		auto const &definition{sweep->definition()};
		double const sign{definition.lateral >= 0.0 ? 1.0 : -1.0};
		struct bin
		{
			double edge{std::numeric_limits<double>::max()};
			std::vector<std::pair<double, double>> points; // lateral, height over the axis
		};
		std::map<int, bin> bins;
		for (auto const &shape : sweep->create_shapes())
			for (auto const &vertex : shape.data().vertices)
			{
				double lateral;
				auto const station{sweep->project(vertex.position, lateral)};
				if (lateral * sign <= 0.0)
					continue;
				auto const axis{sweep->frame_at(station)};
				auto &entry{bins[static_cast<int>(std::floor(station / step))]};
				entry.edge = std::min(entry.edge, std::abs(lateral));
				entry.points.emplace_back(std::abs(lateral), vertex.position.y - axis.position.y);
			}
		WriteLog(format("SELFTEST probe %s: %zu stretches with the model, %.1f - %.1f m of %.1f m", sweep->name().c_str(), bins.size(), sweep->start(), sweep->end(), sweep->length()));
		for (auto const &[index, entry] : bins)
		{
			auto const station{(index + 0.5) * step};
			if (station < sweep->start() || station > sweep->end())
				continue;
			double top{-1000.0};
			for (auto const &point : entry.points)
				if (point.first < entry.edge + 0.15)
					top = std::max(top, point.second);
			auto const at{sweep->frame_at(station)};
			auto const head{0.18 + sweep_node::rail_head(at.roll, definition.lateral)};
			WriteLog(format("SELFTEST probe %s at %.0f m: edge %.3f m from the axis, its top %.3f m over the rail head (cant %.1f deg, gauge widening %.3f m, cant part %.3f m)", sweep->name().c_str(), station, entry.edge, top - head, at.roll,
			                at.widening[definition.lateral >= 0.0 ? 1 : 0], std::max(0.0, at.cant[definition.lateral >= 0.0 ? 1 : 0])));
		}
		return selftest_result::handled;
	}
	if (command == "profile")
	{
		std::string name;
		double station{0.0};
		words >> name >> station;
		auto *sweep{simulation::Sweeps.find(name)};
		if (sweep == nullptr)
		{
			WriteLog("SELFTEST profile: no such sweep");
			return selftest_result::handled;
		}
		auto const &definition{sweep->definition()};
		std::map<int, std::pair<double, double>> columns;
		for (auto const &shape : sweep->create_shapes())
			for (auto const &vertex : shape.data().vertices)
			{
				double lateral;
				auto const at{sweep->project(vertex.position, lateral)};
				if (std::abs(at - station) > 1.0)
					continue;
				auto const axis{sweep->frame_at(at)};
				auto const height{vertex.position.y - axis.position.y - 0.18 - sweep_node::rail_head(axis.roll, definition.lateral)};
				auto &column{columns.try_emplace(static_cast<int>(std::floor(lateral / 0.1)), std::numeric_limits<double>::max(), -std::numeric_limits<double>::max()).first->second};
				column.first = std::min(column.first, height);
				column.second = std::max(column.second, height);
			}
		std::string text;
		for (auto const &[index, column] : columns)
			text += format(" [%.1f %.2f..%.2f]", index * 0.1, column.first, column.second);
		WriteLog(format("SELFTEST profile %s at %.0f m:", name.c_str(), station) + text);
		return selftest_result::handled;
	}
	if (command == "tracks")
	{
		int tab{0};
		words >> tab;
		show_track_tab(track_tab::lineside);
		m_sweep.expand = tab == 0;
		m_hekto.expand = tab == 1;
		m_fouling.expand = tab == 2;
		m_parallel.expand = tab == 3;
		m_vehicle.expand = tab == 4;
		return selftest_result::handled;
	}
	if (command == "curve")
	{
		sweep_curve();
		for (auto const &piece : m_sweep.curve)
		{
			auto const &a{piece.points[segment_data::point::start]};
			auto const &b{piece.points[segment_data::point::end]};
			WriteLog(format("SELFTEST curve piece %.1f %.1f -> %.1f %.1f", a.x, a.z, b.x, b.z));
		}
		if (false == m_sweep.outline.empty())
			WriteLog(format("SELFTEST curve outline %zu points, %.1f %.1f -> %.1f %.1f, %.1f m", m_sweep.outline.size(), m_sweep.outline.front().x, m_sweep.outline.front().z, m_sweep.outline.back().x, m_sweep.outline.back().z, m_sweep.curve_length));
		return selftest_result::handled;
	}
	if (command == "lay")
	{
		std::string name;
		std::string side;
		words >> name >> side;
		auto *track{simulation::Paths.find(name)};
		if (track == nullptr || track->m_paths.empty())
		{
			WriteLog("SELFTEST lay: no track " + name);
			return selftest_result::pause;
		}
		auto const &path{track->m_paths.front()};
		auto const atend{side == "end"};
		editor_track::snap_target start;
		start.track = track;
		start.point = {0, atend ? editor_track::point_kind::end : editor_track::point_kind::start};
		start.position = path.points[atend ? segment_data::point::end : segment_data::point::start];
		auto const &control{path.points[atend ? segment_data::point::control2 : segment_data::point::control1]};
		start.direction = glm::normalize(control != glm::dvec3{} ? control : path.points[atend ? segment_data::point::start : segment_data::point::end] - start.position);
		m_lay.points = {start.position};
		m_lay.start = start;
		for (glm::dvec3 point{0.0, start.position.y, 0.0}; words >> point.x >> point.z;)
			m_lay.points.push_back(point);
		lay_finish({});
		WriteLog("SELFTEST lay: " + m_lay.status);
		return selftest_result::handled;
	}
	if (command == "analyse")
	{
		std::string name;
		words >> name;
		editor_track::curve curve;
		if (auto *track{simulation::Paths.find(name)}; track != nullptr && editor_track::find_curve(*track, m_straights.tolerance, m_route.design.norms.gauge, curve))
		{
			std::string arcs;
			for (auto const &arc : curve.arcs)
				arcs += format(" R%.0f/%.1fdeg/after %.1fm", arc.radius, glm::degrees(arc.turn), arc.transition);
			WriteLog(format("SELFTEST analyse %s: R %.0f, compound %d, in %.1f m, out %.1f m, turn %.1f deg,", name.c_str(), curve.radius, curve.compound ? 1 : 0, curve.transition_in, curve.transition_out, glm::degrees(curve.turn)) + arcs);
		}
		else
			WriteLog("SELFTEST analyse " + name + ": no curve");
		return selftest_result::handled;
	}
	if (command == "route")
	{
		glm::dvec3 point{0.0};
		int single{1};
		words >> point.x >> point.z >> single;
		TTrack *nearest{nullptr};
		double distance{1e9};
		for (auto *track : simulation::Paths.sequence())
		{
			if (track == nullptr || track->m_editorremoved || track->eType != tt_Normal || track->m_paths.empty())
				continue;
			auto const d{geometry::plan_distance(editor_track::point_at(*track, editor_track::nearest_parameter(*track, point)), point)};
			if (d < distance)
			{
				distance = d;
				nearest = track;
			}
		}
		m_track_tab = track_tab::route;
		m_route.single = (single != 0);
		auto const loaded{nearest != nullptr && route_load(*nearest)};
		WriteLog(format("SELFTEST route: %s from %s, %zu paths, %.3f m, %zu vertices, %d from the design, km %.3f, departed %d by %.3f m, valid %d", loaded ? "loaded" : "failed", nearest != nullptr ? nearest->name().c_str() : "-",
		                m_route.chain.tracks.size(), m_route.chain.length, m_route.design.vertices.size(), m_route.designed, m_route.origin / 1000.0, m_route.departed, m_route.departure, m_route.result.valid ? 1 : 0));
		WriteLog("SELFTEST route status: " + m_route.status + " " + m_route.error);
		for (std::size_t i = 0; i < m_route.design.vertices.size(); ++i)
		{
			auto const &v{m_route.design.vertices[i]};
			auto text{format("SELFTEST route vertex %zu: at %.3f %.3f offset %.3f R %.3f L %.3f / %.3f cant %.1f compound %d share %.4f", i, v.position.x, v.position.y, v.offset, v.radius, v.transition_in, v.transition_out, v.cant, v.compound ? 1 : 0, v.share)};
			for (auto const &arc : v.arcs)
				text += format(" [R %.3f L %.3f share %.4f]", arc.radius, arc.transition, arc.share);
			WriteLog(text);
		}
		return selftest_result::handled;
	}
	if (command == "routevertex" || command == "routearc" || command == "routeshare")
	{
		int index{0};
		words >> index;
		if (index < 0 || index >= static_cast<int>(m_route.design.vertices.size()))
		{
			WriteLog("SELFTEST " + command + ": no vertex " + std::to_string(index));
			return selftest_result::handled;
		}
		auto &vertex{m_route.design.vertices[index]};
		if (command == "routevertex")
			words >> vertex.radius >> vertex.transition_in >> vertex.transition_out >> vertex.cant;
		else if (command == "routeshare")
			words >> vertex.share;
		else
		{
			alignment::compound_arc arc;
			words >> arc.radius >> arc.transition >> arc.share;
			vertex.compound = true;
			vertex.arcs.push_back(arc);
		}
		route_update();
		std::string errors;
		for (auto const &error : m_route.result.errors)
			errors += " " + error;
		WriteLog(format("SELFTEST %s: valid %d, %zu elements, extension %.3f / %.3f", command.c_str(), m_route.result.valid ? 1 : 0, m_route.result.elements.size(), m_route.result.start_extension, m_route.result.end_extension) + errors);
		return selftest_result::handled;
	}
	if (command == "routekm")
	{
		double km{0.0};
		words >> km;
		m_route.origin = km * 1000.0;
		return selftest_result::handled;
	}
	if (command == "routeapply" || command == "routetake")
	{
		if (command == "routeapply")
			route_apply();
		else
			route_take_stored(m_route.departed);
		WriteLog("SELFTEST " + command + ": " + m_route.status + " " + m_route.error);
		return selftest_result::handled;
	}
	if (command == "digitizeall")
	{
		digitize_all();
		WriteLog(format("SELFTEST digitizeall: %zu alignments", alignment_store::records().size()));
		return selftest_result::handled;
	}
	if (command == "alignments")
	{
		auto const &records{alignment_store::records()};
		for (std::size_t r = 0; r < records.size(); ++r)
		{
			auto const &entry{records[r]};
			WriteLog(format("SELFTEST alignment %zu in %s: km %.3f, %zu vertices, %zu elements, consistent %d, length %.3f", r, scene::Layers.layer(entry.layer).name.c_str(), entry.origin / 1000.0, entry.design.vertices.size(), entry.elements.size(), entry.consistent ? 1 : 0, entry.result.length));
			for (auto const &e : entry.elements)
				WriteLog(format("SELFTEST   element %s vertex %d km %.3f L %.3f R %.3f -> %.3f cant %.1f", e.kind.c_str(), e.vertex, (entry.origin + e.chainage) / 1000.0, e.length, e.radius_start, e.radius_end, e.cant));
		}
		for (auto *track : simulation::Paths.sequence())
		{
			if (track == nullptr || track->m_editorremoved || track->eType != tt_Normal || track->m_paths.empty())
				continue;
			auto const found{alignment_store::on_track(*track)};
			std::string text{"SELFTEST   path " + track->name() + ": "};
			if (false == found.has_value())
			{
				auto const closest{alignment_store::at(geometry::bezier{track->m_paths.front()}.point(0.5), 1000.0)};
				text += closest.has_value() ? format("off the alignments, %.3f m from alignment %d", closest->offset, closest->record) : std::string{"off the alignments"};
			}
			else
			{
				auto const e{alignment_store::describe(records[found->record].result.elements[found->element])};
				text += format("alignment %d element %d %s R %.3f -> %.3f, offset %.4f", found->record, found->element, e.kind.c_str(), e.radius_start, e.radius_end, found->offset);
			}
			editor_track::curve curve;
			if (editor_track::find_curve(*track, m_straights.tolerance, m_route.design.norms.gauge, curve))
				text += format(" | curve R %.3f L %.3f / %.3f cant %.1f compound %d arcs %zu %s", curve.radius, curve.transition_in, curve.transition_out, curve.cant, curve.compound ? 1 : 0, curve.arcs.size(), curve.designed.has_value() ? "designed" : "recognized");
			WriteLog(text);
		}
		return selftest_result::handled;
	}
	if (command == "vprofile")
	{
		std::string from;
		std::string to;
		words >> from >> to;
		auto *first{simulation::Paths.find(from)};
		auto *last{simulation::Paths.find(to)};
		if (first == nullptr || last == nullptr)
		{
			WriteLog("SELFTEST vprofile: no such paths");
			return selftest_result::handled;
		}
		m_profile.origin = 0.0;
		profile_open(first, last);
		WriteLog(format("SELFTEST vprofile: %zu spans, %.3f m, km of the start %.3f", m_profile.route.spans.size(), m_profile.route.length, m_profile.origin / 1000.0));
		return selftest_result::handled;
	}
	if (command == "backwardcurve")
	{
		std::string name;
		words >> name;
		auto *track{simulation::Paths.find(name)};
		editor_track::curve curve;
		editor_track::chain chain;
		std::string error;
		if (track == nullptr || false == editor_track::find_curve(*track, m_straights.tolerance, m_route.design.norms.gauge, curve) || false == editor_track::find_chain(curve.from, curve.to, chain, error, true))
		{
			WriteLog("SELFTEST backwardcurve: no curve at " + name);
			return selftest_result::handled;
		}
		std::vector<std::pair<TTrack *, bool>> run;
		for (std::size_t i = chain.tracks.size(); i > 0; --i)
			run.emplace_back(chain.tracks[i - 1], false == chain.forward[i - 1]);
		editor_track::curve backward;
		editor_track::analyse_curve(run, m_route.design.norms.gauge, backward);
		auto text{format("SELFTEST backwardcurve: %zu paths, R %.3f L %.3f / %.3f cant %.1f compound %d %s", run.size(), backward.radius, backward.transition_in, backward.transition_out, backward.cant, backward.compound ? 1 : 0, backward.designed.has_value() ? "designed" : "recognized")};
		for (auto const &arc : backward.arcs)
			text += format(" [R %.3f turn %.4f L %.3f]", arc.radius, arc.turn, arc.transition);
		WriteLog(text);
		return selftest_result::handled;
	}
	if (command == "deletetrack" || command == "deletekind")
	{
		std::string name;
		words >> name;
		if (command == "deletetrack" && name.empty())
		{
			delete_selected_track();
			WriteLog("SELFTEST deletetrack");
			return selftest_result::handled;
		}
		TTrack *chosen{nullptr};
		if (command == "deletetrack")
			chosen = simulation::Paths.find(name);
		else
			for (auto *track : simulation::Paths.sequence())
			{
				if (track == nullptr || track->m_editorremoved || track->eType != tt_Normal || track->m_paths.empty())
					continue;
				auto const found{alignment_store::on_track(*track)};
				if (found.has_value() && alignment_store::describe(alignment_store::records()[found->record].result.elements[found->element]).kind == name)
				{
					chosen = track;
					break;
				}
			}
		if (chosen == nullptr || chosen->m_editorremoved)
		{
			WriteLog("SELFTEST " + command + ": no path " + name);
			return selftest_result::handled;
		}
		m_node = chosen;
		ui()->set_node(m_node);
		auto const deleted{chosen->name()};
		delete_selected_track();
		WriteLog("SELFTEST " + command + ": " + deleted + " deleted");
		return selftest_result::handled;
	}
	if (command == "btfcheck")
	{
		std::string name;
		words >> name;
		auto const textfile{Global.asCurrentSceneryPath + name + ".txtf"};
		auto const binaryfile{Global.asCurrentSceneryPath + name + ".btf"};
		auto const written{scene::terrain_file::prepare(textfile, binaryfile) == scene::terrain_file::state::binary};
		auto const kept{scene::terrain_file::extra(binaryfile)};
		WriteLog(format("SELFTEST btfcheck: binary %d, %zu bytes of the editor lines kept", written ? 1 : 0, kept.size()));
		std::istringstream lines{kept};
		std::string line;
		while (std::getline(lines, line))
			WriteLog("SELFTEST btf kept: " + line);
		return selftest_result::handled;
	}
	if (command == "pathsnear")
	{
		glm::dvec3 point{0.0};
		double radius{100.0};
		words >> point.x >> point.z >> radius;
		for (auto *track : simulation::Paths.sequence())
		{
			if (track == nullptr || track->m_editorremoved || track->m_paths.empty())
				continue;
			for (std::size_t i = 0; i < track->m_paths.size(); ++i)
			{
				auto const &path{track->m_paths[i]};
				auto const &a{path.points[segment_data::point::start]};
				auto const &b{path.points[segment_data::point::end]};
				if (geometry::plan_distance(a, point) > radius && geometry::plan_distance(b, point) > radius)
					continue;
				auto const &c1{path.points[segment_data::point::control1]};
				auto const &c2{path.points[segment_data::point::control2]};
				WriteLog(format("SELFTEST path %s/%zu %s: %.3f %.3f -> %.3f %.3f, c1 %.3f %.3f, c2 %.3f %.3f, %.3f m", track->name().c_str(), i, track->eType == tt_Switch ? "switch" : "normal", a.x, a.z, b.x, b.z, c1.x, c1.z, c2.x, c2.z, geometry::bezier{path}.plan_length()));
			}
		}
		return selftest_result::handled;
	}
	if (command == "splitkind" || command == "nudgekind")
	{
		std::string kind;
		glm::dvec3 offset{0.0};
		words >> kind >> offset.x >> offset.z;
		auto const &records{alignment_store::records()};
		TTrack *chosen{nullptr};
		for (auto *track : simulation::Paths.sequence())
		{
			if (track == nullptr || track->m_editorremoved || track->eType != tt_Normal || track->m_paths.empty())
				continue;
			auto const found{alignment_store::on_track(*track)};
			if (found.has_value() && alignment_store::describe(records[found->record].result.elements[found->element]).kind == kind)
			{
				chosen = track;
				break;
			}
		}
		if (chosen == nullptr)
		{
			WriteLog("SELFTEST " + command + ": no path over " + kind);
			return selftest_result::handled;
		}
		if (command == "splitkind")
		{
			auto const before{editor_track::capture(*chosen)};
			auto *created{editor_track::split_path(*chosen, 0.5)};
			if (created != nullptr)
				push_track_snapshot({{chosen, before}}, {created});
			WriteLog("SELFTEST splitkind: " + chosen->name() + " split, the second half " + (created != nullptr ? created->name() : std::string{"-"}));
		}
		else
		{
			std::vector<std::pair<TTrack *, editor_track::state>> states{{chosen, editor_track::capture(*chosen)}};
			std::vector<TTrack *> moved{chosen};
			auto const &path{chosen->m_paths.front()};
			for (auto const &end : {path.points[segment_data::point::start], path.points[segment_data::point::end]})
				for (auto *neighbour : {chosen->trPrev, chosen->trNext})
				{
					if (neighbour == nullptr || neighbour->m_paths.empty() || std::find(moved.begin(), moved.end(), neighbour) != moved.end())
						continue;
					auto const &other{neighbour->m_paths.front()};
					for (auto const kind : {editor_track::point_kind::start, editor_track::point_kind::end})
						if (glm::distance(other.points[kind == editor_track::point_kind::start ? segment_data::point::start : segment_data::point::end], end) < 0.01)
						{
							states.emplace_back(neighbour, editor_track::capture(*neighbour));
							editor_track::move_point(*neighbour, {0, kind}, end + offset);
							moved.push_back(neighbour);
							break;
						}
				}
			editor_track::translate(*chosen, offset);
			editor_track::commit(moved);
			push_track_snapshot(std::move(states), {});
			WriteLog("SELFTEST nudgekind: " + chosen->name() + " moved with " + std::to_string(moved.size() - 1) + " joined ends");
		}
		return selftest_result::handled;
	}
	if (command == "digitize")
	{
		glm::dvec3 point{0.0};
		words >> point.x >> point.z;
		TTrack *nearest{nullptr};
		double distance{1e9};
		for (auto *track : simulation::Paths.sequence())
		{
			if (track == nullptr || track->m_editorremoved || track->eType != tt_Normal || track->m_paths.empty())
				continue;
			auto const d{geometry::plan_distance(editor_track::point_at(*track, editor_track::nearest_parameter(*track, point)), point)};
			if (d < distance)
			{
				distance = d;
				nearest = track;
			}
		}
		auto const kept{nearest != nullptr && digitize_drawn({nearest}, false)};
		WriteLog(format("SELFTEST digitize %s: %d", nearest != nullptr ? nearest->name().c_str() : "-", kept ? 1 : 0));
		return selftest_result::handled;
	}
	if (command == "parallel")
	{
		words >> m_parallel.spacing >> m_parallel.side;
		m_parallel.scope = 1;
		m_parallel.built_for = nullptr;
		parallel_build();
		WriteLog("SELFTEST parallel: " + m_parallel.status + " " + m_parallel.error);
		return selftest_result::handled;
	}
	return selftest_result::unhandled;
}

editor_mode::selftest_result editor_mode::selftest_switch(std::string const &command, std::istringstream &words)
{
	if (command == "curvedswitch")
	{
		std::string name;
		std::string label;
		glm::dvec3 at{0.0};
		glm::dvec3 toward{0.0};
		words >> name >> at.x >> at.z >> toward.x >> toward.z >> label;
		m_node = simulation::Paths.find(name);
		ui()->set_node(m_node);
		show_track_tab(track_tab::turnout);
		arm_switch();
		auto &tool{m_switch};
		for (int i = 0; i < static_cast<int>(tool.templates.size()); ++i)
			if (false == label.empty() && tool.templates[i].label.find(label) != std::string::npos)
			{
				tool.armed = i;
				break;
			}
		m_cursor_override = at;
		auto const started{start_switch_placement()};
		m_cursor_override.reset();
		if (false == started)
		{
			WriteLog("SELFTEST curvedswitch: not started, " + tool.status);
			return selftest_result::handled;
		}
		tool.mouse = glm::dvec3{toward.x, tool.point.y, toward.z};
		finish_switch_placement();
		WriteLog("SELFTEST curvedswitch " + (tool.armed >= 0 ? tool.templates[tool.armed].label : std::string{}) + ": " + tool.status);
		return selftest_result::handled;
	}
	if (command == "conecheck")
	{
		std::string name;
		words >> name;
		auto *track{simulation::Paths.find(name)};
		if (track == nullptr || track->m_paths.size() < 2)
		{
			WriteLog("SELFTEST conecheck: no switch " + name);
			return selftest_result::handled;
		}
		geometry::bezier const main{track->m_paths[0]};
		geometry::bezier const other{track->m_paths[1]};
		std::string text;
		for (int i = 1; i <= 8; ++i)
		{
			auto const t{i * 0.125};
			auto const point{other.point(t)};
			double best{std::numeric_limits<double>::max()};
			double along{0.0};
			for (int k = 0; k <= 2000; ++k)
				if (auto const distance{geometry::plan_distance(main.point(k / 2000.0), point)}; distance < best)
				{
					best = distance;
					along = k / 2000.0;
				}
			auto const base{main.point(along)};
			auto const direction{glm::normalize(geometry::plan_of(main.first(along)))};
			auto const lateral{(point.x - base.x) * -direction.y + (point.z - base.z) * direction.x};
			auto const &path{track->m_paths[0]};
			auto const roll{glm::radians(path.rolls[0] + (path.rolls[1] - path.rolls[0]) * along)};
			auto const tangent{main.first(along)};
			auto const beyond{(point.x - base.x) * direction.x + (point.z - base.z) * direction.y};
			auto const cone{base.y + beyond * tangent.y / glm::length(geometry::plan_of(tangent)) - lateral * std::tan(roll)};
			text += format(" [t %.3f off %.3f dy %.4f]", t, lateral, point.y - cone);
		}
		WriteLog("SELFTEST conecheck " + name + ":" + text);
		return selftest_result::handled;
	}
	if (command == "switchdrive")
	{
		int index{-1};
		int side{0};
		words >> index >> side;
		scan_switch_drives();
		m_switch.drive = index;
		m_switch.drive_side = side;
		WriteLog("SELFTEST switchdrive: " + (index >= 0 && index < static_cast<int>(m_switch.drives.size()) ? m_switch.drives[index].name : std::string{"none"}));
		return selftest_result::handled;
	}
	if (command == "drivechoice")
	{
		int index{-1};
		int side{0};
		words >> index >> side;
		scan_switch_drives();
		m_switch.drive = index;
		m_switch.drive_side = side;
		m_switch.status.clear();
		auto *track{selected_track()};
		if (track != nullptr && track->eType == tt_Switch && false == track->m_editorremoved)
			apply_switch_drive_choice(*track);
		WriteLog("SELFTEST drivechoice: " + (track != nullptr ? track->name() : std::string{"no switch"}) + ", " + m_switch.status);
		return selftest_result::handled;
	}
	if (command == "drives")
	{
		std::string name;
		words >> name;
		scan_switch_drives();
		std::string files;
		for (auto const &standing : standing_templates([](std::string const &File) { return File.find("napedy/") != std::string::npos; }))
			if (false == standing.values.empty() && standing.values[0] == name)
			{
				files += " " + standing.file;
				for (std::size_t i = 1; i < standing.values.size(); ++i)
					files += (i == 1 ? " (" : " ") + standing.values[i] + (i + 1 == standing.values.size() ? ")" : "");
			}
		for (scene::instance_handle handle = 1; handle <= scene::Layers.instance_count(); ++handle)
			if (scene::Layers.tracked(handle) && scene::Layers.instance(handle).file != nullptr && scene::Layers.instance(handle).file->find("napedy") != std::string::npos)
				files += format(" [%d %s removed %d dead %d]", static_cast<int>(handle), scene::Layers.instance(handle).file->c_str(), scene::Layers.instance(handle).removed ? 1 : 0, scene::Layers.instance(handle).dead ? 1 : 0);
		WriteLog("SELFTEST drives " + name + ": chosen " + (m_switch.drive >= 0 ? m_switch.drives[m_switch.drive].name : std::string{"none"}) + ", side " + std::to_string(m_switch.drive_side) + ", standing" + files + ", steps " + std::to_string(m_history.size()));
		return selftest_result::handled;
	}
	if (command == "driveflip")
	{
		std::string name;
		words >> name;
		auto *track{simulation::Paths.find(name)};
		auto const done{track != nullptr && flip_switch_drive(*track)};
		WriteLog("SELFTEST driveflip " + name + ": " + (done ? "done " : "failed ") + m_switch.status);
		return selftest_result::handled;
	}
	if (command == "driveput" || command == "drivefamily")
	{
		std::string name;
		int family{-1};
		words >> name >> family;
		auto *track{simulation::Paths.find(name)};
		auto const done{track != nullptr && (command == "driveput" ? place_switch_drive(*track) : replace_switch_drive(*track, family, false))};
		WriteLog("SELFTEST " + command + " " + name + ": " + (done ? "done " : "failed ") + m_switch.status);
		return selftest_result::handled;
	}
	if (command == "drivetilt")
	{
		std::string name;
		words >> name;
		auto *model{simulation::Instances.find(name)};
		auto *track{simulation::Paths.find(name.substr(0, name.find('_')))};
		if (model == nullptr || track == nullptr)
		{
			WriteLog("SELFTEST drivetilt: no " + name);
			return selftest_result::handled;
		}
		auto const &path{track->m_paths[0]};
		auto const transform{glm::dmat3(model->rotation_scale())};
		auto const across{transform * glm::dvec3{1.0, 0.0, 0.0}};
		auto const forward{transform * glm::dvec3{0.0, 0.0, 1.0}};
		auto const direction{glm::normalize(glm::dvec2{forward.x, forward.z})};
		auto const lateral{across.x * -direction.y + across.z * direction.x};
		auto const cone{-lateral * std::tan(glm::radians(static_cast<double>(path.rolls[0])))};
		auto const control{path.points[segment_data::point::control1]};
		auto const grade{control.y / std::hypot(control.x, control.z)};
		WriteLog(format("SELFTEST drivetilt %s: angles %.3f %.3f %.3f, +x rises %.4f (cone %.4f), +z rises %.4f (grade %.4f), origin %.3f %.3f %.3f, points %.3f", name.c_str(), model->Angles().x, model->Angles().y, model->Angles().z, across.y, cone, forward.y, grade,
		                model->location().x, model->location().y, model->location().z, path.points[segment_data::point::start].y));
		return selftest_result::handled;
	}
	if (command == "switchplace" || command == "switchcurve" || command == "slipplace")
	{
		std::string label;
		glm::dvec3 point{0.0};
		int direction{1};
		int side{1};
		words >> label >> point.x >> point.z >> direction >> side;
		std::replace(label.begin(), label.end(), '_', ' ');
		auto &tool{m_switch};
		tool.templates = editor_track::standard_switch_templates();
		tool.collected = true;
		tool.armed = -1;
		for (int i = 0; i < static_cast<int>(tool.templates.size()); ++i)
			if (tool.templates[i].label.rfind(label, 0) == 0)
			{
				tool.armed = i;
				break;
			}
		TTrack *nearest{nullptr};
		double distance{1e9};
		for (auto *track : simulation::Paths.sequence())
		{
			if (track == nullptr || track->m_editorremoved || track->eType != tt_Normal || track->m_paths.empty())
				continue;
			auto const d{geometry::plan_distance(editor_track::point_at(*track, editor_track::nearest_parameter(*track, point)), point)};
			if (d < distance)
			{
				distance = d;
				nearest = track;
			}
		}
		if (tool.armed < 0 || nearest == nullptr)
		{
			WriteLog("SELFTEST " + command + ": no template " + label + " or no path");
			return selftest_result::handled;
		}
		tool.status.clear();
		if (command == "switchcurve")
		{
			editor_track::curve curve;
			editor_track::chain chain;
			std::string error;
			if (false == editor_track::find_curve(*nearest, m_straights.tolerance, m_route.design.norms.gauge, curve) || false == editor_track::find_chain(curve.from, curve.to, chain, error, true))
			{
				WriteLog("SELFTEST switchcurve: no curve");
				return selftest_result::handled;
			}
			tool.frame = sample_chain(chain);
			tool.frame_tracks = chain.tracks;
			tool.curved = true;
			tool.along = nearest_station(tool.frame, point);
			insert_curved_switch(direction, side);
		}
		else
		{
			auto const line{editor_track::find_straight(*nearest, m_straights.tolerance)};
			if (command == "slipplace")
			{
				WriteLog(format("SELFTEST slipplace: straight from %s, %zu paths, start %.3f %.3f, %.3f m", nearest->name().c_str(), line.tracks.size(), line.start.x, line.start.z, line.length));
				insert_double_slip(line, point, tool.templates[tool.armed]);
			}
			else
				insert_switch(line, std::clamp(line.along(point), 0.0, line.length), direction, side);
		}
		WriteLog("SELFTEST " + command + ": " + tool.status + " " + m_straights.status);
		return selftest_result::handled;
	}
	if (command == "switchlink" || command == "branchlink")
	{
		std::string label;
		glm::dvec3 point{0.0};
		glm::dvec3 target{0.0};
		if (command == "switchlink")
			words >> label;
		words >> point.x >> point.z >> target.x >> target.z;
		std::replace(label.begin(), label.end(), '_', ' ');
		auto const log_link = [&](editor_track::branch_link const &Link, std::string const &Reason) {
			WriteLog(format("SELFTEST %s plan: valid %d, R %.1f m, before %.3f m, after %.3f m, trim %.3f m, shortfall %.3f m, %zu pieces%s", command.c_str(), Link.valid ? 1 : 0, Link.radius, Link.before, Link.after, Link.trim,
			                Link.shortfall, Link.pieces.size(), Reason.empty() ? "" : (", " + Reason).c_str()));
			for (auto const &piece : Link.pieces)
			{
				auto const &a{piece.points[segment_data::point::start]};
				auto const &b{piece.points[segment_data::point::end]};
				WriteLog(format("SELFTEST %s piece: %.3f %.3f %.3f -> %.3f %.3f %.3f, L %.3f m, R %.1f m", command.c_str(), a.x, a.y, a.z, b.x, b.y, b.z, geometry::bezier{piece}.plan_length(), static_cast<double>(piece.radius)));
			}
		};
		if (command == "switchlink")
		{
			show_track_tab(track_tab::turnout);
			auto &tool{m_switch};
			tool.templates = editor_track::standard_switch_templates();
			tool.collected = true;
			tool.armed = -1;
			for (int i = 0; i < static_cast<int>(tool.templates.size()); ++i)
				if (tool.templates[i].label.rfind(label, 0) == 0)
				{
					tool.armed = i;
					break;
				}
			TTrack *nearest{nullptr};
			double distance{1e9};
			for (auto *track : simulation::Paths.sequence())
			{
				if (track == nullptr || track->m_editorremoved || track->eType != tt_Normal || track->m_paths.empty())
					continue;
				auto const d{geometry::plan_distance(editor_track::point_at(*track, editor_track::nearest_parameter(*track, point)), point)};
				if (d < distance)
				{
					distance = d;
					nearest = track;
				}
			}
			if (tool.armed < 0 || nearest == nullptr)
			{
				WriteLog("SELFTEST switchlink: no template " + label + " or no path");
				return selftest_result::handled;
			}
			m_node = nearest;
			ui()->set_node(m_node);
			m_cursor_override = point;
			if (false == start_switch_placement())
			{
				m_cursor_override.reset();
				WriteLog("SELFTEST switchlink: not started, " + tool.status);
				return selftest_result::handled;
			}
			tool.mouse = glm::dvec3{target.x, tool.point.y, target.z};
			switch_link plan;
			plan_switch_link(plan);
			log_link(plan.link, plan.reason);
			finish_switch_placement();
			m_cursor_override.reset();
			WriteLog("SELFTEST switchlink: " + tool.status);
			return selftest_result::handled;
		}
		TTrack *own{nullptr};
		for (auto *track : simulation::Paths.sequence())
			if (track != nullptr && false == track->m_editorremoved && track->eType == tt_Switch && track->m_paths.size() == 2 && geometry::plan_distance(track->m_paths[1].points[segment_data::point::end], point) < 3.0)
				own = track;
		if (own == nullptr)
		{
			WriteLog("SELFTEST branchlink: no switch branch end there");
			return selftest_result::handled;
		}
		editor_track::snap_target end;
		end.track = own;
		end.point = {1, editor_track::point_kind::end};
		end.position = own->m_paths[1].points[segment_data::point::end];
		if (false == start_extend(end))
		{
			WriteLog("SELFTEST branchlink: the branch end isn't free");
			return selftest_result::handled;
		}
		m_extend.pressed = {-10000.f, -10000.f};
		m_extend.mouse = glm::dvec3{target.x, m_extend.point.y, target.z};
		m_extend.snap = editor_track::find_free_end(own, own->iCategoryFlag & 15, m_extend.mouse, 3.0, {own});
		editor_track::branch_link link;
		std::string reason;
		plan_branch_link(link, reason);
		log_link(link, reason);
		finish_extend();
		WriteLog(format("SELFTEST branchlink: switch now %.3f %.3f -> %.3f %.3f", own->m_paths[0].points[segment_data::point::start].x, own->m_paths[0].points[segment_data::point::start].z, own->m_paths[0].points[segment_data::point::end].x,
		                own->m_paths[0].points[segment_data::point::end].z));
		return selftest_result::handled;
	}
	if (command == "switchslide" || command == "switchreplace")
	{
		std::string name;
		words >> name;
		auto *track{simulation::Paths.find(name)};
		if (track == nullptr || track->eType != tt_Switch || track->m_paths.size() < 2)
		{
			WriteLog("SELFTEST " + command + ": no switch " + name);
			return selftest_result::handled;
		}
		if (command == "switchslide")
		{
			double distance{0.0};
			words >> distance;
			double low{0.0};
			double high{0.0};
			std::string reason;
			auto const room{switch_room(*track, low, high, reason)};
			auto const done{slide_switch(*track, distance)};
			WriteLog(format("SELFTEST switchslide %s %.3f: room %d %.3f .. %.3f, done %d, %s", name.c_str(), distance, room ? 1 : 0, low, high, done ? 1 : 0, m_switch.status.c_str()));
			return selftest_result::handled;
		}
		std::string label;
		int side{1};
		words >> label >> side;
		std::replace(label.begin(), label.end(), '_', ' ');
		auto const templates{editor_track::standard_switch_templates()};
		auto const found{std::find_if(templates.begin(), templates.end(), [&](editor_track::switch_template const &Template) { return Template.label.rfind(label, 0) == 0; })};
		if (found == templates.end())
		{
			WriteLog("SELFTEST switchreplace: no template " + label);
			return selftest_result::handled;
		}
		auto const &main{track->m_paths[0]};
		auto const origin{main.points[segment_data::point::start]};
		auto const chord{geometry::plan_of(main.points[segment_data::point::end] - origin)};
		auto const length{glm::length(chord)};
		auto paths{editor_track::place_switch(*found, origin, chord / length, side, (main.points[segment_data::point::end].y - origin.y) / length)};
		std::string status;
		auto const done{paths.size() >= 2 && move_switch_paths(*track, paths, status)};
		if (done)
		{
			record_switch(*track, *found);
			records_to_history();
			straight_refresh();
		}
		WriteLog(format("SELFTEST switchreplace %s %s: done %d, %s", name.c_str(), found->label.c_str(), done ? 1 : 0, status.c_str()));
		return selftest_result::handled;
	}
	if (command == "switches")
	{
		for (auto const &entry : switch_store::records())
		{
			std::string parts;
			for (auto const &part : entry.parts)
				parts += part + " ";
			WriteLog(format("SELFTEST switch record %s %s: %s, R %.3f 1:%.3f hand %c a %.3f b %.3f main R %.3f, branch R %.3f, km %s, number %s, %s, parts %s", entry.kind.c_str(), entry.name.c_str(), switch_store::label(entry).c_str(), entry.radius, entry.ratio, entry.hand, entry.a,
			                entry.b, entry.main_radius, switch_store::branch_radius(entry), entry.km.has_value() ? format("%.3f", *entry.km / 1000.0).c_str() : "-", entry.number.c_str(), entry.source.c_str(), parts.c_str()));
		}
		speed_check::options options;
		options.norms = m_route.design.norms;
		for (auto *track : simulation::Paths.sequence())
		{
			if (track == nullptr || track->m_editorremoved || track->eType != tt_Switch || track->m_paths.size() < 2)
				continue;
			auto const known{switch_store::of(*track)};
			geometry::bezier const branch{track->m_paths[1]};
			auto const first{branch.first(0.3)};
			auto const second{branch.second(0.3)};
			auto const planar{std::abs(first.x * second.z - first.z * second.x) / std::pow(first.x * first.x + first.z * first.z, 1.5)};
			auto const verdict{speed_check::check(*track, 1, options)};
			WriteLog(format("SELFTEST switch %s: %s, branch R at 0.3 %.3f, path R %.3f, branch speed %.1f km/h at R %.1f", track->name().c_str(), known.has_value() ? switch_store::label(*known).c_str() : "no record", planar > 1e-9 ? 1.0 / planar : 0.0,
			                track->m_paths[1].radius, verdict.safe, verdict.radius));
		}
		return selftest_result::handled;
	}
	return selftest_result::unhandled;
}

editor_mode::selftest_result editor_mode::selftest_join(std::string const &command, std::istringstream &words)
{
	if (command == "join" || command == "layto")
	{
		glm::dvec3 a{0.0};
		glm::dvec3 b{0.0};
		words >> a.x >> a.z >> b.x >> b.z;
		auto const from{editor_track::find_free_end(nullptr, 1, a, 3.0, {})};
		extend_tool tool;
		if (from.track == nullptr || false == free_end(*from.track, from.point.path, from.point.kind == editor_track::point_kind::end, tool))
		{
			WriteLog("SELFTEST " + command + ": no free end at the first point");
			return selftest_result::handled;
		}
		std::vector<segment_data> pieces;
		std::string error;
		double length{0.0};
		if (command == "join")
		{
			double radius{0.0};
			int variant{0};
			int transitions{0};
			words >> radius >> variant >> transitions;
			auto const to{editor_track::find_free_end(nullptr, 1, b, 3.0, {from.track})};
			if (to.track == nullptr)
			{
				WriteLog("SELFTEST join: no free end at the second point");
				return selftest_result::handled;
			}
			m_join_radius = radius;
			m_join_variant = variant;
			m_lay.transitions = transitions != 0;
			pieces = join_pieces(tool.track, from.point, tool.point, tool.direction, to, length, error);
		}
		else
		{
			int layout{0};
			words >> layout >> m_lay.radius;
			m_track_layout = static_cast<track_layout>(std::clamp(layout, 0, 3));
			m_extend = tool;
			m_extend.active = true;
			m_extend.mouse = {b.x, tool.point.y, b.z};
			m_extend.snap = {};
			pieces = extend_pieces();
			m_extend.active = false;
		}
		std::vector<TTrack *> created;
		for (auto const &piece : pieces)
			created.push_back(editor_track::create_path(*tool.track, piece));
		editor_track::commit(created);
		digitize_drawn(created);
		if (false == created.empty())
			push_track_snapshot({}, created);
		char const *const kinds[]{"none", "straight", "arc", "curve", "reverse curve", "free curve"};
		auto const &join{m_join_last};
		WriteLog(format("SELFTEST %s: %s, %zu paths, R %.1f m, cant %.0f mm, transitions %.1f m, V %.0f km/h, variants %d%s", command.c_str(), kinds[static_cast<int>(join.kind)], pieces.size(), join.radius, join.cant,
		                join.transition, join.speed, join.variants, error.empty() ? "" : (", " + error).c_str()));
		auto heading{tool.direction};
		glm::dvec3 previous{tool.point};
		for (auto const *track : created)
		{
			auto const &path{track->m_paths.front()};
			geometry::bezier const curve{path};
			auto const begin{glm::normalize(geometry::plan_of(curve.first(0.0)))};
			auto const finish{glm::normalize(geometry::plan_of(curve.first(1.0)))};
			WriteLog(format("SELFTEST %s path %s: L %.2f m, R %.1f m, rolls %.2f %.2f, kink %.4f deg, step %.4f m", command.c_str(), track->name().c_str(), curve.plan_length(), static_cast<double>(path.radius),
			                static_cast<double>(path.rolls[0]), static_cast<double>(path.rolls[1]), glm::degrees(std::abs(geometry::signed_angle(heading, begin))), glm::distance(previous, path.points[segment_data::point::start])));
			heading = finish;
			previous = path.points[segment_data::point::end];
		}
		if (false == created.empty())
			WriteLog(format("SELFTEST %s end: %.3f m from the target", command.c_str(), geometry::plan_distance(previous, b)));
		return selftest_result::handled;
	}
	if (command == "tracktab")
	{
		std::string key;
		words >> key;
		for (auto const &mode : track_modes())
			if (key == mode.key)
				show_track_tab(mode.tab);
		WriteLog(format("SELFTEST tracktab %s: %s", key.c_str(), track_mode_name().c_str()));
		return selftest_result::handled;
	}
	if (command == "laychain")
	{
		int layout{0};
		words >> layout >> m_lay.radius;
		m_track_layout = static_cast<track_layout>(std::clamp(layout, 0, 3));
		m_lay.active = true;
		lay_cancel();
		auto const report = [&](std::string const &Step) {
			auto const *start{m_lay.start.track};
			WriteLog(format("SELFTEST laychain %s: chain %zu, points %zu, start %s%s at %.2f %.2f, history %zu, status %s", Step.c_str(), m_lay.chain.size(), m_lay.points.size(), start != nullptr ? start->name().c_str() : "-", start != nullptr && start->m_editorremoved ? " (removed)" : "",
			                m_lay.points.empty() ? 0.0 : m_lay.points.front().x, m_lay.points.empty() ? 0.0 : m_lay.points.front().z, m_history.size(), m_lay.status.c_str()));
		};
		for (std::string word; words >> word;)
		{
			if (word == "b")
				lay_back();
			else if (word == "u")
				undo_last();
			else if (word == "r")
				redo_last();
			else
			{
				glm::dvec3 point{std::strtod(word.c_str(), nullptr), 5000.0, 0.0};
				words >> point.z;
				std::vector<char> found;
				auto const ground{ground_heights({point}, true, &found)};
				point.y = found[0] != 0 ? ground[0] : m_lay.points.empty() ? 0.0 : m_lay.points.back().y;
				m_lay.mouse_snap = editor_track::find_free_end(nullptr, 1, point, 3.0, {});
				m_lay.mouse = m_lay.mouse_snap.track != nullptr ? point : lay_bed(point);
				lay_click();
				word += format(" %.1f", point.z);
			}
			report(word);
		}
		lay_cancel();
		return selftest_result::handled;
	}
	if (command == "layclicks")
	{
		int layout{0};
		words >> layout >> m_lay.radius;
		m_track_layout = static_cast<track_layout>(std::clamp(layout, 0, 3));
		auto const active{m_lay.active};
		m_lay.active = true;
		lay_cancel();
		auto const before{m_history.size()};
		for (glm::dvec3 point{0.0}; words >> point.x >> point.z;)
		{
			point.y = 5000.0;
			std::vector<char> found;
			auto const ground{ground_heights({point}, true, &found)};
			point.y = found[0] != 0 ? ground[0] : m_lay.points.empty() ? 0.0 : m_lay.points.back().y;
			m_lay.mouse_snap = editor_track::find_free_end(nullptr, 1, point, 3.0, {});
			m_lay.mouse = m_lay.mouse_snap.track != nullptr ? point : lay_bed(point);
			WriteLog(format("SELFTEST layclicks ground %.3f, track %.3f", point.y, m_lay.mouse.y));
			lay_click();
			WriteLog(format("SELFTEST layclicks %.1f %.1f: %s", point.x, point.z, m_lay.status.c_str()));
		}
		lay_cancel();
		m_lay.active = active;
		glm::dvec2 heading{0.0};
		glm::dvec3 previous{0.0};
		double slope{0.0};
		bool first{true};
		double hanging{0.0};
		double buried{0.0};
		int paths{0};
		for (auto step{before}; step < m_history.size(); ++step)
			for (auto const *track : m_history[step].created)
			{
				auto const &path{track->m_paths.front()};
				geometry::bezier const curve{path};
				auto const begin{glm::normalize(geometry::plan_of(curve.first(0.0)))};
				auto const &a{path.points[segment_data::point::start]};
				auto const &b{path.points[segment_data::point::end]};
				auto const rise = [](glm::dvec3 const &Tangent) { return Tangent.y / std::max(1e-9, glm::length(geometry::plan_of(Tangent))); };
				WriteLog(format("SELFTEST layclicks path %s: %.2f %.2f -> %.2f %.2f, L %.2f m, R %.1f m, kink %.4f deg, step %.4f m, y %.3f -> %.3f, grade %.2f -> %.2f permille, grade break %.3f permille", track->name().c_str(), a.x, a.z, b.x, b.z, curve.plan_length(), static_cast<double>(path.radius),
				                first ? 0.0 : glm::degrees(std::abs(geometry::signed_angle(heading, begin))), first ? 0.0 : glm::distance(previous, a), a.y, b.y, 1000.0 * rise(curve.first(0.0)), 1000.0 * rise(curve.first(1.0)),
				                first ? 0.0 : 1000.0 * std::abs(rise(curve.first(0.0)) - slope)));
				slope = rise(curve.first(1.0));
				heading = glm::normalize(geometry::plan_of(curve.first(1.0)));
				previous = b;
				first = false;
				auto const count{std::max(1, static_cast<int>(std::ceil(curve.plan_length() / 2.0)))};
				for (int k = 0; k <= count; ++k)
				{
					auto const t{curve.parameter(curve.plan_length() * k / count)};
					auto const target{bed_heights({curve.point(t) + glm::dvec3{0.0, 50.0, 0.0}}, {geometry::plan_of(curve.first(t))}, track).front()};
					if (std::isnan(target))
						continue;
					hanging = std::max(hanging, curve.point(t).y - target);
					buried = std::max(buried, target - curve.point(t).y);
				}
				++paths;
			}
		WriteLog(format("SELFTEST layclicks %d paths, ballast foot over the ground up to %.3f m, under it up to %.3f m", paths, hanging, buried));
		return selftest_result::handled;
	}
	if (command == "joints")
	{
		std::vector<glm::dvec3> points;
		for (glm::dvec3 point{0.0}; words >> point.x >> point.z;)
			points.push_back(point);
		auto const scope{m_joints.scope};
		m_joints.scope = 1;
		joints_start();
		while (m_joints.next < m_joints.queue.size())
			joints_step();
		m_joints.scope = scope;
		char const *const kinds[]{"gap", "step", "kink", "cant jump", "grade break", "free end"};
		int around{0};
		for (auto const &issue : m_joints.issues)
		{
			if (issue.type == joint_issue::kind::open)
				continue;
			if (std::none_of(points.begin(), points.end(), [&](glm::dvec3 const &Point) { return geometry::plan_distance(Point, issue.position) < 5.0; }))
				continue;
			++around;
			WriteLog(format("SELFTEST joints: %s %.3f at %.1f %.1f, %s / %s", kinds[static_cast<int>(issue.type)], issue.value, issue.position.x, issue.position.z, issue.track != nullptr ? issue.track->name().c_str() : "-",
			                issue.other != nullptr ? issue.other->name().c_str() : "-"));
		}
		WriteLog(format("SELFTEST joints: %d issues around the points, %zu in all", around, m_joints.issues.size()));
		return selftest_result::handled;
	}
	if (command == "gizmo")
	{
		std::string action;
		words >> action;
		auto *track{selected_track()};
		if (track == nullptr)
		{
			WriteLog("SELFTEST gizmo: nothing selected");
			return selftest_result::handled;
		}
		if (action == "set")
		{
			m_track_set.clear();
			for (std::string name; words >> name;)
				if (auto *each{simulation::Paths.find(name)}; each != nullptr)
					m_track_set.push_back(each);
			m_track_set_pivot = track_set_centre();
			WriteLog(format("SELFTEST gizmo set: %zu tracks, centre %.3f %.3f", m_track_set.size(), m_track_set_pivot.x, m_track_set_pivot.z));
		}
		else if (action == "setturn")
		{
			double degrees{0.0};
			words >> degrees;
			if (track_set_begin(true))
			{
				track_set_turn(glm::radians(degrees));
				track_set_end();
			}
		}
		else if (action == "op")
		{
			std::string operation;
			words >> operation;
			choose_work_area(work_area::tracks);
			m_gizmo_op = operation == "rotate" ? gizmo_operation::rotate : operation == "scale" ? gizmo_operation::scale : gizmo_operation::translate;
			int path{-1};
			std::string kind;
			words >> path >> kind;
			m_track_point = {};
			if (path >= 0)
				m_track_point = {path, kind == "c1" ? editor_track::point_kind::control1 : kind == "c2" ? editor_track::point_kind::control2 : kind == "end" ? editor_track::point_kind::end : editor_track::point_kind::start};
		}
		else if (action == "begin")
		{
			std::string operation;
			std::string kind;
			int path{-1};
			words >> operation >> path >> kind;
			m_track_point = {};
			if (path >= 0)
				m_track_point = {path, kind == "c1" ? editor_track::point_kind::control1 : kind == "c2" ? editor_track::point_kind::control2 : kind == "end" ? editor_track::point_kind::end : editor_track::point_kind::start};
			auto const wanted{operation == "rotate" ? gizmo_operation::rotate : operation == "scale" ? gizmo_operation::scale : gizmo_operation::translate};
			auto const previous{m_gizmo_op};
			m_gizmo_op = wanted;
			auto const chosen{track_gizmo_operation(*track, m_track_point.valid())};
			m_gizmo_op = previous;
			track_gizmo_begin(*track, m_track_point.valid(), chosen);
			WriteLog(format("SELFTEST gizmo begin %s: %s, %zu tracks dragged, %zu joints, %zu partners%s", operation.c_str(), chosen == gizmo_operation::rotate ? "rotate" : chosen == gizmo_operation::scale ? "scale" : "translate", m_track_drag.size(), m_track_joints.size(),
			                m_track_gizmo_drag.partners.size(), m_track_gizmo_drag.fixed != glm::dvec3{} ? ", fixed direction" : ""));
		}
		else if (action == "turn")
		{
			double degrees{0.0};
			std::string axis{"y"};
			words >> degrees >> axis;
			m_track_gizmo_drag.ring = axis == "x" ? 0 : axis == "z" ? 2 : 1;
			track_gizmo_turn(*track, m_track_gizmo_drag.ring, glm::radians(degrees));
			track_gizmo_switches(*track);
			WriteLog(format("SELFTEST gizmo turn %s: %s", axis.c_str(), track_readout().c_str()));
		}
		else if (action == "length")
		{
			double length{0.0};
			words >> length;
			track_gizmo_length(*track, length);
			track_gizmo_switches(*track);
			WriteLog(format("SELFTEST gizmo length %.3f of %.3f, %zu pieces", m_track_gizmo_drag.stretch, m_track_gizmo_drag.length, m_track_gizmo_drag.pieces));
		}
		else if (action == "control")
		{
			glm::dvec3 control{0.0};
			words >> control.x >> control.y >> control.z;
			track_gizmo_control(*track, control);
			track_gizmo_switches(*track);
		}
		else if (action == "offset")
		{
			glm::dvec3 offset{0.0};
			words >> offset.x >> offset.y >> offset.z;
			if (m_track_point.valid())
			{
				track_gizmo_point(*track, editor_track::point_position(*track, m_track_point) + offset);
			}
			else
			{
				editor_track::translate(*track, offset);
				editor_track::follow(*track, m_track_joints);
			}
			track_gizmo_switches(*track);
			m_track_dirty = true;
		}
		else if (action == "end")
			track_gizmo_end(*track);
		else if (action == "show")
		{
			std::vector<TTrack *> shown{track};
			for (auto *neighbour : editor_track::neighbours(*track))
				shown.push_back(neighbour);
			WriteLog(format("SELFTEST gizmo %s prev %s next %s", track->name().c_str(), track->trPrev != nullptr ? track->trPrev->name().c_str() : "-", track->trNext != nullptr ? track->trNext->name().c_str() : "-"));
			for (auto *each : shown)
				for (int i = 0; i < static_cast<int>(each->m_paths.size()); ++i)
				{
					auto const &path{each->m_paths[i]};
					auto const &a{path.points[segment_data::point::start]};
					auto const &b{path.points[segment_data::point::end]};
					auto const &c1{path.points[segment_data::point::control1]};
					auto const &c2{path.points[segment_data::point::control2]};
					WriteLog(format("SELFTEST gizmo path %s[%d] %.3f %.3f %.3f -> %.3f %.3f %.3f, c1 %.3f %.3f %.3f, c2 %.3f %.3f %.3f, L %.3f, R %.1f, rolls %.2f %.2f", each->name().c_str(), i, a.x, a.y, a.z, b.x, b.y, b.z, c1.x, c1.y, c1.z, c2.x, c2.y, c2.z,
					                geometry::bezier{path}.plan_length(), path.radius, path.rolls[0], path.rolls[1]));
				}
			for (int i = 0; i < static_cast<int>(track->m_paths.size()); ++i)
				for (auto const kind : {editor_track::point_kind::start, editor_track::point_kind::end})
				{
					geometry::bezier const own{track->m_paths[i]};
					bool const start{kind == editor_track::point_kind::start};
					auto const out{start ? -own.first(0.0) : own.first(1.0)};
					for (auto const &partner : editor_track::partners(*track, {i, kind}))
					{
						geometry::bezier const theirs{partner.first->m_paths[partner.second.path]};
						auto const in{partner.second.kind == editor_track::point_kind::start ? theirs.first(0.0) : -theirs.first(1.0)};
						auto const angle{glm::degrees(std::acos(std::clamp(glm::dot(glm::normalize(out), glm::normalize(in)), -1.0, 1.0)))};
						auto const gap{glm::distance(editor_track::point_position(*track, {i, kind}), editor_track::point_position(*partner.first, partner.second))};
						WriteLog(format("SELFTEST gizmo joint %s[%d].%s - %s[%d]: kink %.4f deg, gap %.4f m", track->name().c_str(), i, start ? "start" : "end", partner.first->name().c_str(), partner.second.path, angle, gap));
					}
				}
		}
		return selftest_result::handled;
	}
	return selftest_result::unhandled;
}

editor_mode::selftest_result editor_mode::selftest_signal(std::string const &command, std::istringstream &words)
{
	if (command == "signal" || command == "signalmove" || command == "signaldelete" || command == "signalrename" || command == "signalprobe")
	{
		std::map<std::string, std::string> values;
		std::string pair;
		while (words >> pair)
		{
			auto const equals{pair.find('=')};
			if (equals != std::string::npos)
				values[pair.substr(0, equals)] = pair.substr(equals + 1);
		}
		show_track_tab(track_tab::signals);
		signal_refresh(true);
		auto &tool{m_signal};
		auto const standing_named = [&](std::string const &Name) -> signal_standing const * {
			auto const found{std::find_if(tool.standing.begin(), tool.standing.end(), [&](signal_standing const &Standing) { return Standing.name == Name; })};
			return found != tool.standing.end() ? &*found : nullptr;
		};
		auto const spot_on = [&](signal_template const &Template, int const Facing, int const Side, signal_spot &Spot) {
			auto *track{simulation::Paths.find(values["track"])};
			if (track == nullptr)
				return false;
			auto const path{values.count("path") ? std::stoi(values["path"]) : 0};
			auto const at{values.count("at") ? std::stod(values["at"]) : 0.5};
			geometry::bezier const curve{track->m_paths[std::clamp(path, 0, static_cast<int>(track->m_paths.size()) - 1)]};
			return signal_spot_at(*track, path, curve.point(at), curve.point(at), Facing, Side, Template, Spot);
		};
		if (command == "signal")
		{
			auto const *item{signal_template_of(values["file"])};
			if (item == nullptr)
			{
				WriteLog("SELFTEST signal: no signal template " + values["file"]);
				return selftest_result::handled;
			}
			for (int k = 0; k < static_cast<int>(tool.templates.size()); ++k)
				if (&tool.templates[k] == item)
				{
					static char const *const kinds[] = {"main", "block", "warning", "shunt", "stop", "substitute", "repeater"};
					for (int i = 0; i < 7; ++i)
						if (item->kind == kinds[i])
						{
							tool.kind = i;
							tool.chosen[i] = k;
						}
				}
			if (values.count("name"))
				std::snprintf(tool.name, sizeof(tool.name), "%s", values["name"].c_str());
			if (values.count("plate"))
				std::snprintf(tool.plate, sizeof(tool.plate), "%s", values["plate"].c_str());
			auto const side{values["side"] == "left" ? -1 : 1};
			auto const facing{values["facing"] == "along" ? 1 : values["facing"] == "against" ? -1 : 0};
			signal_spot spot;
			if (false == spot_on(*signal_armed(), facing, side, spot))
			{
				WriteLog("SELFTEST signal: no such track " + values["track"]);
				return selftest_result::handled;
			}
			auto const placed{signal_place(spot, *signal_armed())};
			WriteLog(format("SELFTEST signal %s: %s", placed ? "placed" : "failed", tool.status.c_str()));
		}
		else if (command == "signalmove")
		{
			auto const *standing{standing_named(values["name"])};
			auto const *item{standing != nullptr ? signal_template_of(standing->include.file) : nullptr};
			if (item == nullptr)
			{
				WriteLog("SELFTEST signalmove: no signal " + values["name"]);
				return selftest_result::handled;
			}
			auto const yaw{glm::radians(standing->include.yaw + 180.0)};
			glm::dvec2 const travel{std::sin(yaw), std::cos(yaw)};
			signal_spot probe;
			if (false == spot_on(*item, 1, 1, probe))
			{
				WriteLog("SELFTEST signalmove: no such track " + values["track"]);
				return selftest_result::handled;
			}
			auto const facing{glm::dot(probe.travel, travel) >= 0.0 ? 1 : -1};
			auto const sideoftravel{glm::dot(geometry::plan_of(standing->include.location) - geometry::plan_of(standing->spot.axis), glm::dvec2{-travel.y, travel.x}) >= 0.0 ? 1 : -1};
			signal_select(standing->include.instance);
			tool.moving = true;
			tool.moved_valid = spot_on(*item, facing, sideoftravel * facing, tool.moved);
			tool.pressed = {-1000.f, -1000.f};
			signal_release();
			WriteLog("SELFTEST signalmove: " + tool.status);
		}
		else if (command == "signaldelete")
		{
			auto const *standing{standing_named(values["name"])};
			auto const deleted{standing != nullptr && signal_delete(standing->include.instance)};
			WriteLog(std::string{"SELFTEST signaldelete "} + values["name"] + (deleted ? ": removed with its event" : ": not removed by the signal tool"));
		}
		else if (command == "signalrename")
		{
			auto const *standing{standing_named(values["name"])};
			if (standing == nullptr)
			{
				WriteLog("SELFTEST signalrename: no signal " + values["name"]);
				return selftest_result::handled;
			}
			select_include(standing->include.instance);
			m_include.values[0] = values["to"];
			apply_include();
			m_include_gesture = false;
			WriteLog("SELFTEST signalrename " + values["name"] + " -> " + values["to"]);
		}
		else
		{
			signal_refresh(true);
			WriteLog(format("SELFTEST signalprobe: %zu signals", tool.standing.size()));
			for (auto const &standing : tool.standing)
			{
				std::string where{"not read"};
				if (standing.track != nullptr)
				{
					auto const &curve{standing.track->m_paths.front()};
					geometry::bezier const bez{curve};
					auto best{std::numeric_limits<double>::max()};
					double parameter{0.0};
					for (int k = 0; k <= 1024; ++k)
					{
						auto const d{geometry::plan_distance(bez.point(k / 1024.0), standing.include.location)};
						if (d < best)
						{
							best = d;
							parameter = k / 1024.0;
						}
					}
					auto const axis{bez.point(parameter)};
					auto tangent{bez.first(parameter)};
					glm::dvec2 travel{tangent.x, tangent.z};
					travel = glm::normalize(travel) * (standing.list == 1 ? -1.0 : 1.0);
					glm::dvec2 const offset{standing.include.location.x - axis.x, standing.include.location.z - axis.z};
					auto const cross{travel.x * offset.y - travel.y * offset.x};
					auto heading{glm::degrees(std::atan2(travel.x, travel.y))};
					auto turn{std::fmod(standing.include.yaw - heading + 720.0, 360.0)};
					auto const &list{editor_track::events(*standing.track, standing.list)};
					auto const bound{std::any_of(list.begin(), list.end(), [&](auto const &Event) { return Event.second != nullptr && ToLower(Event.first) == ToLower(standing.read); })};
					where = std::string{bound ? "bound, " : "unbound, "} + format("%s of %s, %.3f m from the axis, %s of the trains, %.3f m over the axis, model turned %.1f deg from the travel", editor_track::event_keyword(standing.list), standing.track->name().c_str(), glm::length(offset), cross > 0.0 ? "right" : "left",
					               standing.include.location.y - axis.y, turn);
				}
				WriteLog(format("SELFTEST signalprobe %s %s at %.3f %.3f %.3f yaw %.2f read %s: %s", standing.name.c_str(), standing.include.file.c_str(), standing.include.location.x, standing.include.location.y, standing.include.location.z, standing.include.yaw,
				                standing.read.empty() ? "-" : standing.read.c_str(), where.c_str()));
			}
		}
		return selftest_result::handled;
	}
	return selftest_result::unhandled;
}

editor_mode::selftest_result editor_mode::selftest_terrain(std::string const &command, std::istringstream &words)
{
	if (command == "orthophoto")
	{
		auto config{m_orthophoto.settings()};
		int fit{1};
		int inscene{0};
		words >> config.north >> config.east >> config.radius >> fit >> inscene;
		config.drape = fit != 0;
		config.in_scene = inscene != 0;
		m_orthophoto.settings(config);
		m_orthophoto.enabled(true);
		WriteLog(format("SELFTEST orthophoto at %.0f %.0f, radius %d, %s%s", config.north, config.east, config.radius, config.drape ? "fitted" : "flat", config.in_scene ? ", in the scene" : ""));
		return selftest_result::handled;
	}
	if (command == "terrainmode")
	{
		m_terrain_open = true;
		WriteLog("SELFTEST terrainmode");
		return selftest_result::handled;
	}
	if (command == "terrainsculpt" || command == "terrainpaint" || command == "terrainlevel")
	{
		double x{0.0};
		double z{0.0};
		double radius{10.0};
		double value{1.0};
		int mode{0};
		words >> x >> z >> radius >> value >> mode;
		auto const changed{command == "terrainsculpt" ? m_streamer.sculpt(x, z, radius, value)
		                   : command == "terrainlevel" ? m_streamer.level(x, z, radius, value, 1.0, mode)
		                                               : m_streamer.paint(x, z, radius, 1.0, static_cast<std::uint16_t>(value))};
		forget_ground();
		WriteLog(format("SELFTEST %s %.1f %.1f: %s", command.c_str(), x, z, changed ? "changed" : "nothing changed"));
		return selftest_result::handled;
	}
	if (command == "terrainmodifier")
	{
		heightmap::modifier modifier;
		heightmap::corridor_point a, b;
		double formation{0.0};
		double halfwidth{3.5};
		words >> modifier.name >> a.position.x >> a.position.y >> b.position.x >> b.position.y >> formation >> halfwidth;
		b.formation = formation;
		a.formation = b.formation;
		b.half_width = halfwidth;
		a.half_width = b.half_width;
		modifier.points = {a, b};
		m_streamer.modifier(std::move(modifier));
		forget_ground();
		WriteLog(format("SELFTEST terrainmodifier: %zu modifiers", m_streamer.modifiers().size()));
		return selftest_result::handled;
	}
	if (command == "terrainfill")
	{
		int layer{0};
		words >> layer >> m_paint_feather >> m_paint_rotation;
		m_terrain_layer = layer;
		m_paint_outline.clear();
		double x;
		double z;
		while (words >> x >> z)
			m_paint_outline.emplace_back(x, 0.0, z);
		fill_terrain_area();
		std::string palette;
		for (auto const &entry : m_streamer.manifest().layers)
			palette += format(" [%s %.1f m %.0f deg]", entry.material.c_str(), entry.size, entry.rotation);
		WriteLog("SELFTEST terrainfill: " + m_terrain_status + ", palette" + palette);
		return selftest_result::handled;
	}
	if (command == "terrainturn")
	{
		int layer{0};
		float degrees{0.f};
		words >> layer >> degrees;
		m_streamer.layer_rotation(static_cast<std::uint16_t>(layer), degrees);
		WriteLog(format("SELFTEST terrainturn %d: %.1f deg", layer, m_streamer.manifest().layers.at(layer).rotation));
		return selftest_result::handled;
	}
	if (command == "terraintouchup")
	{
		int state{1};
		words >> state;
		m_streamer.touch_up(state != 0);
		WriteLog(format("SELFTEST terraintouchup %d", state));
		return selftest_result::handled;
	}
	if (command == "terrainrestore")
	{
		double x{0.0};
		double z{0.0};
		double radius{10.0};
		words >> x >> z >> radius;
		auto const changed{m_streamer.restore_stitching(x, z, radius, 1.0)};
		forget_ground();
		WriteLog(format("SELFTEST terrainrestore %.1f %.1f: %s, touch-ups left %zu", x, z, changed ? "changed" : "nothing changed", m_streamer.touched_up()));
		return selftest_result::handled;
	}
	if (command == "terrainbake")
	{
		std::string name;
		words >> name;
		auto const baked{m_streamer.bake_modifier(name)};
		forget_ground();
		WriteLog(format("SELFTEST terrainbake %s: %s, %zu modifiers left", name.c_str(), baked ? "baked" : "not found", m_streamer.modifiers().size()));
		return selftest_result::handled;
	}
	if (command == "terrainselect")
	{
		int cx{0};
		int cz{0};
		std::string add;
		words >> cx >> cz >> add;
		if (add != "add")
			m_terrain_selection.clear();
		if (m_streamer.exists({cx, cz}))
			m_terrain_selection.insert({cx, cz});
		WriteLog(format("SELFTEST terrainselect: %zu selected", m_terrain_selection.size()));
		return selftest_result::handled;
	}
	if (command == "terrainresolution")
	{
		float spacing{1.f};
		int paint{1};
		words >> spacing >> paint;
		m_terrain_convert_spacing = heightmap::valid_spacing(spacing);
		m_terrain_convert_paint = paint != 0;
		convert_selected_chunks();
		WriteLog("SELFTEST terrainresolution: " + m_terrain_status);
		return selftest_result::handled;
	}
	if (command == "terrainwater" || command == "terrainwaterdefault")
	{
		if (command == "terrainwaterdefault")
		{
			std::string material;
			words >> material;
			m_streamer.water_material(material);
		}
		else
		{
			std::size_t index{0};
			std::string material;
			float size{0.f};
			words >> index >> material >> size;
			auto water{m_streamer.water()};
			if (index < water.size())
			{
				water[index].material = material == "-" ? std::string{} : material;
				water[index].size = size;
				m_streamer.water(std::move(water));
			}
		}
		std::string list;
		for (auto const &body : m_streamer.water())
			list += format(" [%s: %s, %.1f m]", body.name.c_str(), body.material.empty() ? "default" : body.material.c_str(), body.size);
		WriteLog("SELFTEST " + command + ": default " + m_streamer.manifest().water_material + list);
		return selftest_result::handled;
	}
	if (command == "terrainadd")
	{
		int count{1};
		float spacing{m_terrain_spacing};
		words >> count >> spacing;
		m_terrain_spacing = heightmap::valid_spacing(spacing);
		add_chunks_around(std::clamp(count, 1, 8));
		WriteLog("SELFTEST terrainadd: " + m_terrain_status);
		return selftest_result::handled;
	}
	if (command == "terrainprobe")
	{
		double x{0.0};
		double z{0.0};
		double height{0.0};
		words >> x >> z;
		auto const *chunk{m_streamer.terrain_at(x, z)};
		std::string materials;
		if (chunk != nullptr)
			for (std::size_t slot = 0; slot < std::max<std::size_t>(1, chunk->data().layer_count()); ++slot)
			{
				auto const layer{chunk->data().layers[slot]};
				auto const &palette{m_streamer.manifest().layers};
				materials += (layer < palette.size() ? palette[layer].material : std::string{"?"}) + " ";
			}
		auto const found{m_streamer.height_at(x, z, height)};
		std::string grid;
		if (chunk != nullptr)
		{
			auto const &data{chunk->data()};
			double base{0.0};
			double adjust{0.0};
			if (false == data.base.empty())
				base = data.height_in(data.base, x, z);
			if (false == data.adjust.empty())
				adjust = data.height_in(data.adjust, x, z);
			grid = format(", spacing %.1f, paint %d, base %s %.3f, touch-up %.3f", data.spacing(), data.paint, data.base.empty() ? "none" : "", base, adjust);
			if (data.paint > 0)
			{
				// weights at the paint sample nearest the point
				auto const corner{data.corner()};
				auto const ix{static_cast<int>(std::lround((x - corner.x) / heightmap::chunk_size * data.paint))};
				auto const iz{static_cast<int>(std::lround((z - corner.y) / heightmap::chunk_size * data.paint))};
				grid += ", weights";
				for (std::size_t slot = 0; slot < data.layer_count(); ++slot)
					grid += format(" %d", data.weight(slot, std::clamp(ix, 0, data.paint), std::clamp(iz, 0, data.paint)));
			}
		}
		WriteLog(format("SELFTEST terrainprobe %.1f %.1f: %s %.3f, %zu chunks, materials %s%s", x, z, found ? "height" : "no terrain", height, m_streamer.resident(), materials.c_str(), grid.c_str()));
		return selftest_result::handled;
	}
	if (command == "terrainconvert")
	{
		load_ground_files();
		for (auto const &source : m_ground_conversion.files)
		{
			glm::dvec3 low{1e30};
			glm::dvec3 high{-1e30};
			for (auto index = source.first; index < source.first + source.count; ++index)
				for (auto const &vertex : m_ground_conversion.triangles[index])
				{
					low = glm::min(low, vertex);
					high = glm::max(high, vertex);
				}
			WriteLog("SELFTEST terrain file " + source.file + (source.text ? " (text): " : " (binary): ") + source.message +
			         format(", from %.1f %.1f %.1f to %.1f %.1f %.1f", low.x, low.y, low.z, high.x, high.y, high.z));
		}
		m_ground_conversion.status = convert_ground();
		WriteLog("SELFTEST terrainconvert: " + m_ground_conversion.status);
		return selftest_result::handled;
	}
	return selftest_result::unhandled;
}

// the script is a text file, one action a line:
//   wait <frames>
//   camera <x> <y> <z> <x> <y> <z>        from the first point, looking at the second
//   select <track name>
//   sweep <key>=<value>...               model, params (separated by commas), lateral, height, side (origin, near, far,
//                                        centre), top (origin, bottom, top, edge), mode (bend, repeat), step,
//                                        length (original, all, or metres), from, to, widen (0, 1), face (0, 1), tilt (0, 1)
//   selectmodel <x> <z>                  the model instance nearest the point
//   bend <key>=<value>...                the selected model bent along a track: track (index on the list), axis (auto, z, x),
//                                        turned (0, 1), along (start, origin, middle, end, point), side (origin, near, far,
//                                        middle, point), height (origin, bottom, top, edge, point), point=<x>,<y>,<z>,
//                                        pick=<x>,<y>,<z> (a point of the scene picked as the reference point), go (0, 1)
//   selectinclude <x> <z>                the include placed nearest the point
//   addmodel <x> <z>                     the model instance nearest the point added to the selection, or taken out (Shift+LMB)
//   selection                            logs the selected models, with the models of their groups
//   moveselection <x> <y> <z>            the selection moved by the offset, as the gizmo moves it
//   turnselection <degrees>              the selection turned around the model with the gizmo
//   copy, paste <x> <y> <z>, group, ungroup, drop, delete   as the keys of the selection do them
//   bendset <key>=<value>...             the bent model being edited: length, lateral, height, along, side, height
//   bendprobe                            logs the bent model being edited
//   undo, redo
//   key <S|W|CTRL|RMB> <press|release> [ctrl]  a key or right button event, as the window gives it
//   lineside <vehicle|hekto|fouling|parallel>  the tab of the objects along the track in the track window
//   event <name>                         queues the event
//   memcell <name>                       logs the memory cell
//   bendpanel                            unfolds the bend section of the toolset
//   openscenerypopup                     the window of File / Open scenery, its list searched for zz_
//   openscenery <scenery file>           the editor starts again with the scenery
//   checkspans                           logs whether the text the scenery files hold at each node's place starts and ends it
//   spread <track> <stop 0..2> <reach>   logs the paths the spread from the track takes
//   newscenery                           the editor starts again with the wizard of a new scenery
//   mapstate                             logs the orthophoto, the top view and the //$o line of the scenery
//   trainset <track> <vehicle path> <skin> <facing> [km/h]  the trainset tool puts the vehicle in the middle of the track
//   vehicles                             logs each vehicle: its head, facing, and what its couplers hold
//   terrainmode                          the terrain field of work, with its texture browser
//   terrainsculpt <x> <z> <radius> <metres>, terrainpaint <x> <z> <radius> <palette entry>,
//   terrainlevel <x> <z> <radius> <target height> [mode]   as a stroke of the brush
//   terrainadd <count> <spacing>          chunks made around the camera, count x count, as the button of the chunks panel does it
//   terrainprobe <x> <z>                 logs the height of the heightmap terrain and the materials of the chunk
//   terrainconvert                       converts every material of the terrain files of the scenery
//   terrainmodifier <name> <x0> <z0> <x1> <z1> <formation> <half width>   a straight modifier, as the vertical profile makes them
//   terraintouchup <0|1>                 the brushes touch up over the modifiers, or shape the ground under them
//   terrainrestore <x> <z> <radius>      a stroke of the restore brush
//   terrainbake <name>                   the modifier baked into the ground
//   terrainselect <cx> <cz> [add]        the chunk selected with the spacing tool (add: Ctrl)
//   terrainresolution <spacing> [paint 0|1]   the selected chunks converted, as the button of the resolution panel does it
//   terrainfill <palette entry> <blur> <rotation> <x> <z> <x> <z> <x> <z>...   the area outlined filled, as the fill tool does it
//   terrainturn <palette entry> <degrees>  the textures of the palette entry turned
//   terrainwater <index> <material> [size]    material and repeat of a body of water; terrainwaterdefault <material>
//   orthophoto <north> <east> <radius> <fit 0|1> [in scene 0|1]   the imagery layer on, placed and fitted as given
//   join <x> <z> <x> <z> [radius] [variant] [transitions 0|1]   the free ends at the points joined, as a drag from one to the other
//   layto <x> <z> <x> <z> <layout 0..3> <radius>   from the free end at the first point towards the second, as a drag in the layout
//   layclicks <layout 0..3> <radius> <x> <z>...   clicks of the lay tool at the points, a free end within 3 m joined
//   joints <x> <z>...                    the joints check over the scenery, the issues around the points logged
//   route <x> <z> <single 0|1>          the route design of the path nearest the point, a curve or the whole line
//   routevertex <i> <R> <L in> <L out> <cant>, routearc <i> <R> <L> <share>, routeshare <i> <share>, routekm <km>
//   routeapply, routetake                as the buttons of the route design do it
//   alignments                           logs the alignments kept in the scenery and the element under each path
//   digitizeall                          every line not digitized yet kept in the scenery, as the button of the route design does it
//   splitkind <kind>, nudgekind <kind> <dx> <dz>   the first path over an element of the kind split in two, or moved
//   switchplace <template> <x> <z> <direction> <side>   the catalogue template whose label starts so put into the straight
//                                        nearest the point, or into the curve (switchcurve); slipplace <template> <x> <z>
//   switches                             logs the switches kept in the scenery and the speed of each diverging track
//   deletetrack <name>, deletekind <kind>   the path deleted as Del does it, or the first path over an element of the kind
//   btfcheck <terrain file>              the .txtf converted to .btf, the editor lines the binary file keeps logged
//   screenshot
//   save
//   log <text>
//   quit
void editor_mode::selftest_step()
{
	auto &test{m_selftest};
	if (false == test.loaded)
	{
		test.loaded = true;
		auto const *file{std::getenv("EU07_EDITOR_SELFTEST")};
		if (file == nullptr)
			return;
		std::ifstream stream(file);
		std::string line;
		while (std::getline(stream, line))
			if (false == line.empty() && line.front() != '#')
				test.lines.push_back(line);
		WriteLog("SELFTEST: " + std::to_string(test.lines.size()) + " steps from " + file);
	}
	if (test.wait > 0)
	{
		--test.wait;
		return;
	}
	while (test.next < test.lines.size())
	{
		std::istringstream words(test.lines[test.next++]);
		std::string command;
		words >> command;
		if (command == "wait")
		{
			words >> test.wait;
			return;
		}
		if (selftest_dispatch(command, words) == selftest_result::pause)
			return;
		if (command == "quit")
		{
			if (false == test.quitting)
			{
				WriteLog("SELFTEST done");
				test.quitting = true;
				test.wait = 30;
				--test.next;
				return;
			}
			Application.queue_quit(true);
			return;
		}
	}
}