/**************************************************************************/
/*  animation_blend_space_2d_editor.h                                     */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
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/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
/*                                                                        */
/* Permission is hereby granted, free of charge, to any person obtaining  */
/* a copy of this software and associated documentation files (the        */
/* "Software"), to deal in the Software without restriction, including    */
/* without limitation the rights to use, copy, modify, merge, publish,    */
/* distribute, sublicense, and/or sell copies of the Software, and to     */
/* permit persons to whom the Software is furnished to do so, subject to  */
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/* The above copyright notice and this permission notice shall be         */
/* included in all copies or substantial portions of the Software.        */
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/**************************************************************************/

#ifndef ANIMATION_BLEND_SPACE_2D_EDITOR_H
#define ANIMATION_BLEND_SPACE_2D_EDITOR_H

#include "editor/plugins/animation_tree_editor_plugin.h"
#include "editor/plugins/editor_plugin.h"
#include "scene/animation/animation_blend_space_2d.h"
#include "scene/gui/graph_edit.h"
#include "scene/gui/popup.h"

class Button;
class CheckBox;
class LineEdit;
class OptionButton;
class PanelContainer;
class SpinBox;
class VSeparator;

class AnimationNodeBlendSpace2DEditor : public AnimationTreeNodeEditorPlugin {
	GDCLASS(AnimationNodeBlendSpace2DEditor, AnimationTreeNodeEditorPlugin);

	Ref<AnimationNodeBlendSpace2D> blend_space;
	bool read_only = false;

	PanelContainer *panel = nullptr;
	Button *tool_blend = nullptr;
	Button *tool_select = nullptr;
	Button *tool_create = nullptr;
	Button *tool_triangle = nullptr;
	VSeparator *tool_erase_sep = nullptr;
	Button *tool_erase = nullptr;
	Button *snap = nullptr;
	SpinBox *snap_x = nullptr;
	SpinBox *snap_y = nullptr;
	CheckBox *sync = nullptr;
	OptionButton *interpolation = nullptr;

	Button *auto_triangles = nullptr;

	LineEdit *label_x = nullptr;
	LineEdit *label_y = nullptr;
	SpinBox *max_x_value = nullptr;
	SpinBox *min_x_value = nullptr;
	SpinBox *max_y_value = nullptr;
	SpinBox *min_y_value = nullptr;

	HBoxContainer *edit_hb = nullptr;
	SpinBox *edit_x = nullptr;
	SpinBox *edit_y = nullptr;
	Button *open_editor = nullptr;

	int selected_point;
	int selected_triangle;

	Control *blend_space_draw = nullptr;

	PanelContainer *error_panel = nullptr;
	Label *error_label = nullptr;

	bool updating;

	static AnimationNodeBlendSpace2DEditor *singleton;

	void _blend_space_gui_input(const Ref<InputEvent> &p_event);
	void _blend_space_draw();

	void _update_space();

	void _config_changed(double);
	void _labels_changed(String);
	void _snap_toggled();

	PopupMenu *menu = nullptr;
	PopupMenu *animations_menu = nullptr;
	Vector<String> animations_to_add;
	Vector2 add_point_pos;
	Vector<Vector2> points;

	bool dragging_selected_attempt;
	bool dragging_selected;
	Vector2 drag_from;
	Vector2 drag_ofs;

	Vector<int> making_triangle;

	void _add_menu_type(int p_index);
	void _add_animation_type(int p_index);

	void _tool_switch(int p_tool);
	void _update_edited_point_pos();
	void _update_tool_erase();
	void _erase_selected();
	void _edit_point_pos(double);
	void _open_editor();

	void _auto_triangles_toggled();

	StringName get_blend_position_path() const;

	EditorFileDialog *open_file = nullptr;
	Ref<AnimationNode> file_loaded;
	void _file_opened(const String &p_file);

	enum {
		MENU_LOAD_FILE = 1000,
		MENU_PASTE = 1001,
		MENU_LOAD_FILE_CONFIRM = 1002
	};

	void _blend_space_changed();

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

public:
	static AnimationNodeBlendSpace2DEditor *get_singleton() { return singleton; }
	virtual bool can_edit(const Ref<AnimationNode> &p_node) override;
	virtual void edit(const Ref<AnimationNode> &p_node) override;
	AnimationNodeBlendSpace2DEditor();
};

#endif // ANIMATION_BLEND_SPACE_2D_EDITOR_H