/**************************************************************************/
/*  polygon_2d_editor_plugin.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.                  */
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/* Permission is hereby granted, free of charge, to any person obtaining  */
/* a copy of this software and associated documentation files (the        */
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/* without limitation the rights to use, copy, modify, merge, publish,    */
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/**************************************************************************/

#ifndef POLYGON_2D_EDITOR_PLUGIN_H
#define POLYGON_2D_EDITOR_PLUGIN_H

#include "editor/plugins/abstract_polygon_2d_editor.h"

class AcceptDialog;
class ButtonGroup;
class EditorZoomWidget;
class HScrollBar;
class HSlider;
class Label;
class MenuButton;
class Panel;
class ScrollContainer;
class SpinBox;
class TextureRect;
class ViewPanner;
class VScrollBar;

class Polygon2DEditor : public AbstractPolygon2DEditor {
	GDCLASS(Polygon2DEditor, AbstractPolygon2DEditor);

	enum Mode {
		MODE_EDIT_UV = MODE_CONT,
		UVEDIT_POLYGON_TO_UV,
		UVEDIT_UV_TO_POLYGON,
		UVEDIT_UV_CLEAR,
		UVEDIT_GRID_SETTINGS
	};

	enum UVMode {
		UV_MODE_CREATE,
		UV_MODE_CREATE_INTERNAL,
		UV_MODE_REMOVE_INTERNAL,
		UV_MODE_EDIT_POINT,
		UV_MODE_MOVE,
		UV_MODE_ROTATE,
		UV_MODE_SCALE,
		UV_MODE_ADD_POLYGON,
		UV_MODE_REMOVE_POLYGON,
		UV_MODE_PAINT_WEIGHT,
		UV_MODE_CLEAR_WEIGHT,
		UV_MODE_MAX
	};

	Button *uv_edit_mode[4];
	Ref<ButtonGroup> uv_edit_group;

	Polygon2D *node = nullptr;

	UVMode uv_mode;
	AcceptDialog *uv_edit = nullptr;
	Button *uv_button[UV_MODE_MAX];
	Button *b_snap_enable = nullptr;
	Button *b_snap_grid = nullptr;
	Panel *uv_edit_background = nullptr;
	Polygon2D *preview_polygon = nullptr;
	Control *uv_edit_draw = nullptr;
	EditorZoomWidget *zoom_widget = nullptr;
	HScrollBar *uv_hscroll = nullptr;
	VScrollBar *uv_vscroll = nullptr;
	MenuButton *uv_menu = nullptr;

	Ref<ViewPanner> uv_panner;
	void _uv_pan_callback(Vector2 p_scroll_vec, Ref<InputEvent> p_event);
	void _uv_zoom_callback(float p_zoom_factor, Vector2 p_origin, Ref<InputEvent> p_event);

	VBoxContainer *bone_scroll_main_vb = nullptr;
	ScrollContainer *bone_scroll = nullptr;
	VBoxContainer *bone_scroll_vb = nullptr;
	Button *sync_bones = nullptr;
	HSlider *bone_paint_strength = nullptr;
	SpinBox *bone_paint_radius = nullptr;
	Label *bone_paint_radius_label = nullptr;
	bool bone_painting;
	int bone_painting_bone = 0;
	Vector<float> prev_weights;
	Vector2 bone_paint_pos;
	AcceptDialog *grid_settings = nullptr;

	void _sync_bones();
	void _update_bone_list();

	Vector2 uv_draw_ofs;
	real_t uv_draw_zoom;
	Vector<Vector2> points_prev;
	Vector<Vector2> uv_create_uv_prev;
	Vector<Vector2> uv_create_poly_prev;
	Vector<Color> uv_create_colors_prev;
	int uv_create_prev_internal_vertices = 0;
	Array uv_create_bones_prev;
	Array polygons_prev;

	Vector2 uv_create_to;
	int point_drag_index;
	bool uv_drag;
	bool uv_create;
	Vector<int> polygon_create;
	UVMode uv_move_current;
	Vector2 uv_drag_from;

	AcceptDialog *error = nullptr;

	Button *button_uv = nullptr;

	bool use_snap;
	bool snap_show_grid;
	Vector2 snap_offset;
	Vector2 snap_step;

	virtual void _menu_option(int p_option) override;

	void _cancel_editing();
	void _update_polygon_editing_state();
	void _update_available_modes();

	void _center_view();
	void _update_zoom_and_pan(bool p_zoom_at_center);
	void _uv_input(const Ref<InputEvent> &p_input);
	void _uv_draw();
	void _uv_mode(int p_mode);

	void _set_use_snap(bool p_use);
	void _set_show_grid(bool p_show);
	void _set_snap_off_x(real_t p_val);
	void _set_snap_off_y(real_t p_val);
	void _set_snap_step_x(real_t p_val);
	void _set_snap_step_y(real_t p_val);

	void _uv_edit_mode_select(int p_mode);
	void _uv_edit_popup_show();
	void _uv_edit_popup_hide();
	void _bone_paint_selected(int p_index);

	int _get_polygon_count() const override;

protected:
	virtual Node2D *_get_node() const override;
	virtual void _set_node(Node *p_polygon) override;

	virtual Vector2 _get_offset(int p_idx) const override;

	virtual bool _has_uv() const override { return true; }
	virtual void _commit_action() override;

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

	Vector2 snap_point(Vector2 p_target) const;

public:
	Polygon2DEditor();
};

class Polygon2DEditorPlugin : public AbstractPolygon2DEditorPlugin {
	GDCLASS(Polygon2DEditorPlugin, AbstractPolygon2DEditorPlugin);

public:
	Polygon2DEditorPlugin();
};

#endif // POLYGON_2D_EDITOR_PLUGIN_H