/*
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/.
*/

#pragma once

#include "utilities/parser.h"
#include "scene/scene.h"
#include "scene/scenelayers.h"

namespace simulation {

struct deserializer_state {
	std::string scenariofile;
	cParser input;
	scene::scratch_data scratchpad;
	using deserializefunctionbind = std::function<void()>;
	std::unordered_map<
	    std::string,
	    deserializefunctionbind> functionmap;

	deserializer_state(std::string const &File, cParser::buffertype const Type, const std::string &Path, bool const Loadtraction)
	    : scenariofile(File), input(File, Type, Path, Loadtraction) { }
};

class state_serializer {

public:

// methods
	// starts deserialization from specified file, returns context pointer on success, throws otherwise
	std::shared_ptr<deserializer_state>
	    deserialize_begin(std::string const &Scenariofile);
	// continues deserialization for given context, amount limited by time, returns true if needs to be called again
	bool
	    deserialize_continue(std::shared_ptr<deserializer_state> state);
    // stores class data in specified file, in legacy (text) format
    void
        export_as_text( std::string const &Scenariofile ) const;
	// create new model from node stirng
	TAnimModel * create_model(std::string const &src, std::string const &name, const glm::dvec3 &position);
	// places the vehicles, given as their node statements, as a trainset on the path, while the simulation runs. returns: the vehicles made
	std::vector<TDynamicObject *> insert_trainset(std::string const &Name, TTrack *Path, double const Offset, std::string const &Vehicles, bool const Reversed = false);
	// create new eventlauncher from node stirng
	TEventLauncher * create_eventlauncher(std::string const &src, std::string const &name, const glm::dvec3 &position);
	// creates model instances defined by an include directive placed or changed in the scenery editor, to show the outcome.
	// everything else the included template defines is left out, and takes effect when the saved scenery is loaded.
	// Context: placement in effect at the location of the directive. returns: number of created models and of skipped statements
	std::pair<int, int> preview_include(std::string const &Directive, scene::layer_context const &Context, scene::layer_handle Layer, scene::instance_handle Instance);

private:
// methods
    // restores class data from provided stream
    void deserialize_area( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_isolated( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_assignment( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_atmo( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_camera( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_config( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_description( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_event( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_lua( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_firstinit( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_group( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_endgroup( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_light( cParser &Input, scene::scratch_data &Scratchpad );
	void deserialize_node( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_origin( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_endorigin( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_scale( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_endscale( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_rotate( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_sky( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_weather( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_test( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_time( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_trainset( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_terrain( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_heightmapterrain( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_editorterrain( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_endtrainset( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_reversed( cParser &Input, scene::scratch_data &Scratchpad );
    TTrack * deserialize_path( cParser &Input, scene::scratch_data &Scratchpad, scene::node_data const &Nodedata );
    TTraction * deserialize_traction( cParser &Input, scene::scratch_data &Scratchpad, scene::node_data const &Nodedata );
    TTractionPowerSource * deserialize_tractionpowersource( cParser &Input, scene::scratch_data &Scratchpad, scene::node_data const &Nodedata );
    TMemCell * deserialize_memorycell( cParser &Input, scene::scratch_data &Scratchpad, scene::node_data const &Nodedata );
    TEventLauncher * deserialize_eventlauncher( cParser &Input, scene::scratch_data &Scratchpad, scene::node_data const &Nodedata );
	TAnimModel * deserialize_model( cParser &Input, scene::scratch_data &Scratchpad, scene::node_data const &Nodedata );
	// loads a run of model instances straight from the text. returns: true if any were loaded, false if the definition at hand is left to the parser
	bool deserialize_models( cParser &Input, scene::scratch_data &Scratchpad, scene::node_data &Nodedata, std::size_t Line, std::streamoff Sourcebegin );
	// makes model instance defined by a scenery file a part of the simulation
	void insert_model( TAnimModel *Instance, cParser const &Input, std::size_t Line, scene::source_span const &Span );
    TDynamicObject * deserialize_dynamic( cParser &Input, scene::scratch_data &Scratchpad, scene::node_data const &Nodedata );
    sound_source * deserialize_sound( cParser &Input, scene::scratch_data &Scratchpad, scene::node_data const &Nodedata );
    void init_time();
    // skips content of stream until specified token
    void skip_until( cParser &Input, std::string const &Token );
    // transforms provided location by specifed rotation and offset
    glm::dvec3 transform( glm::dvec3 Location, scene::scratch_data const &Scratchpad );
    void export_nodes_to_stream( std::ostream &, bool Dirty ) const;
};

} // simulation

//---------------------------------------------------------------------------