/*************************************************************************/
/*  animation_blend_space_2d_editor.h                                    */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
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/*************************************************************************/

#ifndef ANIMATION_BLEND_SPACE_2D_EDITOR_H
#define ANIMATION_BLEND_SPACE_2D_EDITOR_H

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

class AnimationNodeBlendSpace2DEditor : public AnimationTreeNodeEditorPlugin {

	GDCLASS(AnimationNodeBlendSpace2DEditor, AnimationTreeNodeEditorPlugin);

	Ref<AnimationNodeBlendSpace2D> blend_space;

	PanelContainer *panel;
	ToolButton *tool_blend;
	ToolButton *tool_select;
	ToolButton *tool_create;
	ToolButton *tool_triangle;
	VSeparator *tool_erase_sep;
	ToolButton *tool_erase;
	ToolButton *snap;
	SpinBox *snap_x;
	SpinBox *snap_y;
	OptionButton *interpolation;

	ToolButton *auto_triangles;

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

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

	int selected_point;
	int selected_triangle;

	Control *blend_space_draw;

	PanelContainer *error_panel;
	Label *error_label;

	bool updating;

	UndoRedo *undo_redo;

	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;
	PopupMenu *animations_menu;
	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 _removed_from_graph();

	void _auto_triangles_toggled();

	StringName get_blend_position_path() const;

	EditorFileDialog *open_file;
	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);
	virtual void edit(const Ref<AnimationNode> &p_node);
	AnimationNodeBlendSpace2DEditor();
};

#endif // ANIMATION_BLEND_SPACE_2D_EDITOR_H
