/*************************************************************************/
/*  tiles_editor_plugin.h                                                */
/*************************************************************************/
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/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
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/*************************************************************************/

#ifndef TILES_EDITOR_PLUGIN_H
#define TILES_EDITOR_PLUGIN_H

#include "editor/editor_plugin.h"
#include "scene/gui/box_container.h"

#include "tile_atlas_view.h"
#include "tile_map_editor.h"
#include "tile_set_editor.h"

class TilesEditorPlugin : public EditorPlugin {
	GDCLASS(TilesEditorPlugin, EditorPlugin);

	static TilesEditorPlugin *singleton;

public:
	enum SourceSortOption {
		SOURCE_SORT_ID = 0,
		SOURCE_SORT_ID_REVERSE,
		SOURCE_SORT_NAME,
		SOURCE_SORT_NAME_REVERSE,
		SOURCE_SORT_MAX
	};

private:
	bool is_visible = false;

	bool tile_map_changed_needs_update = false;
	ObjectID tile_map_id;
	Ref<TileSet> tile_set;
	bool is_editing_tile_set = false;

	Button *tilemap_editor_button = nullptr;
	TileMapEditor *tilemap_editor = nullptr;

	Button *tileset_editor_button = nullptr;
	TileSetEditor *tileset_editor = nullptr;

	void _update_editors();

	// For synchronization.
	int atlas_sources_lists_current = 0;
	float atlas_view_zoom = 1.0;
	Vector2 atlas_view_scroll;

	void _tile_map_changed();

	// Source sorting.
	int source_sort = SOURCE_SORT_ID;

	struct SourceNameComparator {
		static Ref<TileSet> tile_set;
		bool operator()(const int &p_a, const int &p_b) const;
	};

	// Patterns preview generation.
	struct QueueItem {
		Ref<TileSet> tile_set;
		Ref<TileMapPattern> pattern;
		Callable callback;
	};
	List<QueueItem> pattern_preview_queue;
	Mutex pattern_preview_mutex;
	Semaphore pattern_preview_sem;
	Thread pattern_preview_thread;
	SafeFlag pattern_thread_exit;
	SafeFlag pattern_thread_exited;
	Semaphore pattern_preview_done;
	void _preview_frame_started();
	void _pattern_preview_done();
	static void _thread_func(void *ud);
	void _thread();

protected:
	void _notification(int p_what);

public:
	_FORCE_INLINE_ static TilesEditorPlugin *get_singleton() { return singleton; }

	virtual bool forward_canvas_gui_input(const Ref<InputEvent> &p_event) override { return tilemap_editor->forward_canvas_gui_input(p_event); }
	virtual void forward_canvas_draw_over_viewport(Control *p_overlay) override { tilemap_editor->forward_canvas_draw_over_viewport(p_overlay); }

	// Pattern preview API.
	void queue_pattern_preview(Ref<TileSet> p_tile_set, Ref<TileMapPattern> p_pattern, Callable p_callback);

	// To synchronize the atlas sources lists.
	void set_sources_lists_current(int p_current);
	void synchronize_sources_list(Object *p_current_list, Object *p_current_sort_button);

	void set_atlas_view_transform(float p_zoom, Vector2 p_scroll);
	void synchronize_atlas_view(Object *p_current);

	// Sorting.
	void set_sorting_option(int p_option);
	List<int> get_sorted_sources(const Ref<TileSet> p_tile_set) const;

	virtual void edit(Object *p_object) override;
	virtual bool handles(Object *p_object) const override;
	virtual void make_visible(bool p_visible) override;

	static void draw_selection_rect(CanvasItem *p_ci, const Rect2 &p_rect, const Color &p_color = Color(1.0, 1.0, 1.0));

	TilesEditorPlugin();
	~TilesEditorPlugin();
};

#endif // TILES_EDITOR_PLUGIN_H