/*************************************************************************/
/*  tiles_editor_plugin.h                                                */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2021 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 TilesEditor : public VBoxContainer {
	GDCLASS(TilesEditor, VBoxContainer);

	static TilesEditor *singleton;

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

	Button *tileset_tilemap_switch_button;

	Control *tilemap_toolbar;
	TileMapEditor *tilemap_editor;

	Control *tileset_toolbar;
	TileSetEditor *tileset_editor;

	void _update_switch_button();
	void _update_editors();

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

	// 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;
	mutable SafeFlag pattern_preview_done;
	void _pattern_preview_done(const Variant &p_udata);
	static void _thread_func(void *ud);
	void _thread();

	void _tile_map_changed();

protected:
	void _notification(int p_what);
	static void _bind_methods();

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

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

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

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

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

	void edit(Object *p_object);

	TilesEditor(EditorNode *p_editor);
	~TilesEditor();
};

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

private:
	EditorNode *editor_node;
	TilesEditor *tiles_editor;
	Button *tiles_editor_button;

protected:
	void _notification(int p_what);

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

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

	TilesEditorPlugin(EditorNode *p_node);
	~TilesEditorPlugin();
};

#endif // TILES_EDITOR_PLUGIN_H