/*************************************************************************/
/*  editor_resource_picker.h                                             */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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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 EDITOR_RESOURCE_PICKER_H
#define EDITOR_RESOURCE_PICKER_H

#include "scene/gui/box_container.h"
#include "scene/gui/button.h"
#include "scene/gui/popup_menu.h"
#include "scene/gui/texture_rect.h"

class EditorFileDialog;
class EditorQuickOpen;

class EditorResourcePicker : public HBoxContainer {
	GDCLASS(EditorResourcePicker, HBoxContainer);

	static HashMap<StringName, List<StringName>> allowed_types_cache;

	String base_type;
	Ref<Resource> edited_resource;

	bool editable = true;
	bool dropping = false;

	Vector<String> inheritors_array;

	Button *assign_button = nullptr;
	TextureRect *preview_rect = nullptr;
	Button *edit_button = nullptr;
	EditorFileDialog *file_dialog = nullptr;
	EditorQuickOpen *quick_open = nullptr;

	Size2i assign_button_min_size = Size2i(1, 1);

	enum MenuOption {
		OBJ_MENU_LOAD,
		OBJ_MENU_QUICKLOAD,
		OBJ_MENU_EDIT,
		OBJ_MENU_CLEAR,
		OBJ_MENU_MAKE_UNIQUE,
		OBJ_MENU_SAVE,
		OBJ_MENU_COPY,
		OBJ_MENU_PASTE,
		OBJ_MENU_SHOW_IN_FILE_SYSTEM,

		TYPE_BASE_ID = 100,
		CONVERT_BASE_ID = 1000,
	};

	PopupMenu *edit_menu = nullptr;

	void _update_resource_preview(const String &p_path, const Ref<Texture2D> &p_preview, const Ref<Texture2D> &p_small_preview, ObjectID p_obj);

	void _resource_selected();
	void _file_quick_selected();
	void _file_selected(const String &p_path);

	void _update_menu();
	void _update_menu_items();
	void _edit_menu_cbk(int p_which);

	void _button_draw();
	void _button_input(const Ref<InputEvent> &p_event);

	void _get_allowed_types(bool p_with_convert, HashSet<String> *p_vector) const;
	bool _is_drop_valid(const Dictionary &p_drag_data) const;
	bool _is_type_valid(const String p_type_name, HashSet<String> p_allowed_types) const;

	Variant get_drag_data_fw(const Point2 &p_point, Control *p_from);
	bool can_drop_data_fw(const Point2 &p_point, const Variant &p_data, Control *p_from) const;
	void drop_data_fw(const Point2 &p_point, const Variant &p_data, Control *p_from);

	void _ensure_resource_menu();

protected:
	virtual void _update_resource();

	Button *get_assign_button() { return assign_button; }
	static void _bind_methods();
	void _notification(int p_what);

	void set_assign_button_min_size(const Size2i &p_size) {
		assign_button_min_size = p_size;
		assign_button->set_custom_minimum_size(assign_button_min_size);
	}

	GDVIRTUAL1(_set_create_options, Object *)
	GDVIRTUAL1R(bool, _handle_menu_selected, int)

public:
	static void clear_caches();

	void set_base_type(const String &p_base_type);
	String get_base_type() const;
	Vector<String> get_allowed_types() const;

	void set_edited_resource(Ref<Resource> p_resource);
	Ref<Resource> get_edited_resource();

	void set_toggle_mode(bool p_enable);
	bool is_toggle_mode() const;
	void set_toggle_pressed(bool p_pressed);

	void set_editable(bool p_editable);
	bool is_editable() const;

	virtual void set_create_options(Object *p_menu_node);
	virtual bool handle_menu_selected(int p_which);

	EditorResourcePicker(bool p_hide_assign_button_controls = false);
};

class EditorScriptPicker : public EditorResourcePicker {
	GDCLASS(EditorScriptPicker, EditorResourcePicker);

	enum ExtraMenuOption {
		OBJ_MENU_NEW_SCRIPT = 10,
		OBJ_MENU_EXTEND_SCRIPT = 11
	};

	Node *script_owner = nullptr;

protected:
	static void _bind_methods();

public:
	virtual void set_create_options(Object *p_menu_node) override;
	virtual bool handle_menu_selected(int p_which) override;

	void set_script_owner(Node *p_owner);
	Node *get_script_owner() const;

	EditorScriptPicker();
};

class EditorShaderPicker : public EditorResourcePicker {
	GDCLASS(EditorShaderPicker, EditorResourcePicker);

	enum ExtraMenuOption {
		OBJ_MENU_NEW_SHADER = 10,
	};

	ShaderMaterial *edited_material = nullptr;
	int preferred_mode = -1;

public:
	virtual void set_create_options(Object *p_menu_node) override;
	virtual bool handle_menu_selected(int p_which) override;

	void set_edited_material(ShaderMaterial *p_material);
	ShaderMaterial *get_edited_material() const;
	void set_preferred_mode(int p_preferred_mode);

	EditorShaderPicker();
};

class EditorAudioStreamPicker : public EditorResourcePicker {
	GDCLASS(EditorAudioStreamPicker, EditorResourcePicker);

	uint64_t last_preview_version = 0;
	Control *stream_preview_rect = nullptr;

	enum {
		MAX_TAGGED_FRAMES = 8
	};
	float tagged_frame_offsets[MAX_TAGGED_FRAMES];
	uint32_t tagged_frame_offset_count = 0;

	void _preview_draw();
	virtual void _update_resource() override;

protected:
	void _notification(int p_what);

public:
	EditorAudioStreamPicker();
};

#endif // EDITOR_RESOURCE_PICKER_H