/*************************************************************************/
/*  bone_map_editor_plugin.h                                             */
/*************************************************************************/
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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 BONE_MAP_EDITOR_PLUGIN_H
#define BONE_MAP_EDITOR_PLUGIN_H

#include "editor/editor_node.h"
#include "editor/editor_plugin.h"
#include "editor/editor_properties.h"

#include "modules/modules_enabled.gen.h" // For regex.
#ifdef MODULE_REGEX_ENABLED
#include "modules/regex/regex.h"
#endif

#include "scene/3d/skeleton_3d.h"
#include "scene/gui/color_rect.h"
#include "scene/gui/dialogs.h"
#include "scene/resources/bone_map.h"
#include "scene/resources/texture.h"

class BoneMapperButton : public TextureButton {
	GDCLASS(BoneMapperButton, TextureButton);

public:
	enum BoneMapState {
		BONE_MAP_STATE_UNSET,
		BONE_MAP_STATE_SET,
		BONE_MAP_STATE_MISSING,
		BONE_MAP_STATE_ERROR
	};

private:
	StringName profile_bone_name;
	bool selected = false;
	bool require = false;

	TextureRect *circle;

	void fetch_textures();

protected:
	void _notification(int p_what);

public:
	StringName get_profile_bone_name() const;
	void set_state(BoneMapState p_state);

	bool is_require() const;

	BoneMapperButton(const StringName p_profile_bone_name, bool p_require, bool p_selected);
	~BoneMapperButton();
};

class BoneMapperItem : public VBoxContainer {
	GDCLASS(BoneMapperItem, VBoxContainer);

	int button_id = -1;
	StringName profile_bone_name;

	Ref<BoneMap> bone_map;

	EditorPropertyText *skeleton_bone_selector;
	Button *picker_button;

	void _update_property();
	void _open_picker();

protected:
	void _notification(int p_what);
	static void _bind_methods();
	virtual void _value_changed(const String &p_property, Variant p_value, const String &p_name, bool p_changing);
	virtual void create_editor();

public:
	void assign_button_id(int p_button_id);

	BoneMapperItem(Ref<BoneMap> &p_bone_map, const StringName &p_profile_bone_name = StringName());
	~BoneMapperItem();
};

class BonePicker : public AcceptDialog {
	GDCLASS(BonePicker, AcceptDialog);

	Skeleton3D *skeleton = nullptr;
	Tree *bones = nullptr;

public:
	void popup_bones_tree(const Size2i &p_minsize = Size2i());
	bool has_selected_bone();
	StringName get_selected_bone();

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

	void _confirm();

private:
	void create_editors();
	void create_bones_tree(Skeleton3D *p_skeleton);

public:
	BonePicker(Skeleton3D *p_skeleton);
	~BonePicker();
};

class BoneMapper : public VBoxContainer {
	GDCLASS(BoneMapper, VBoxContainer);

	Skeleton3D *skeleton;
	Ref<BoneMap> bone_map;

	EditorPropertyResource *profile_selector;

	Vector<BoneMapperItem *> bone_mapper_items;

	Button *clear_mapping_button;

	VBoxContainer *mapper_item_vbox;

	int current_group_idx = 0;
	int current_bone_idx = -1;

	AspectRatioContainer *bone_mapper_field;
	EditorPropertyEnum *profile_group_selector;
	ColorRect *profile_bg;
	TextureRect *profile_texture;
	Vector<BoneMapperButton *> bone_mapper_buttons;

	void create_editor();
	void recreate_editor();
	void clear_items();
	void recreate_items();
	void update_group_idx();
	void _update_state();

	/* Bone picker */
	BonePicker *picker = nullptr;
	StringName picker_key_name;
	void _pick_bone(const StringName &p_bone_name);
	void _apply_picker_selection();
	void _clear_mapping_current_group();

#ifdef MODULE_REGEX_ENABLED
	/* For auto mapping */
	enum BoneSegregation {
		BONE_SEGREGATION_NONE,
		BONE_SEGREGATION_LEFT,
		BONE_SEGREGATION_RIGHT
	};
	int search_bone_by_name(Skeleton3D *p_skeleton, Vector<String> p_picklist, BoneSegregation p_segregation = BONE_SEGREGATION_NONE, int p_parent = -1, int p_child = -1, int p_children_count = -1);
	BoneSegregation guess_bone_segregation(String p_bone_name);
	void auto_mapping_process(Ref<BoneMap> &p_bone_map);
	void _run_auto_mapping();
#endif // MODULE_REGEX_ENABLED

protected:
	void _notification(int p_what);
	static void _bind_methods();
	virtual void _value_changed(const String &p_property, Variant p_value, const String &p_name, bool p_changing);
	virtual void _profile_changed(const String &p_property, Variant p_value, const String &p_name, bool p_changing);

public:
	void set_current_group_idx(int p_group_idx);
	int get_current_group_idx() const;
	void set_current_bone_idx(int p_bone_idx);
	int get_current_bone_idx() const;

	BoneMapper(Skeleton3D *p_skeleton, Ref<BoneMap> &p_bone_map);
	~BoneMapper();
};

class BoneMapEditor : public VBoxContainer {
	GDCLASS(BoneMapEditor, VBoxContainer);

	Skeleton3D *skeleton;
	Ref<BoneMap> bone_map;
	BoneMapper *bone_mapper;

	void fetch_objects();
	void clear_editors();
	void create_editors();

protected:
	void _notification(int p_what);

public:
	BoneMapEditor(Ref<BoneMap> &p_bone_map);
	~BoneMapEditor();
};

class EditorInspectorPluginBoneMap : public EditorInspectorPlugin {
	GDCLASS(EditorInspectorPluginBoneMap, EditorInspectorPlugin);
	BoneMapEditor *editor;

public:
	virtual bool can_handle(Object *p_object) override;
	virtual void parse_begin(Object *p_object) override;
};

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

public:
	virtual String get_name() const override { return "BoneMap"; }
	BoneMapEditorPlugin();
};

#endif // BONE_MAP_EDITOR_PLUGIN_H