/**************************************************************************/
/*  editor_object_selector.cpp                                            */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
/*                        https://godotengine.org                         */
/**************************************************************************/
/* 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  */
/* the following conditions:                                              */
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/* The above copyright notice and this permission notice shall be         */
/* included in all copies or substantial portions of the Software.        */
/*                                                                        */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
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/**************************************************************************/

#include "editor_object_selector.h"

#include "editor/editor_data.h"
#include "editor/editor_node.h"
#include "editor/editor_string_names.h"
#include "editor/multi_node_edit.h"
#include "editor/themes/editor_scale.h"
#include "scene/gui/margin_container.h"

Size2 EditorObjectSelector::get_minimum_size() const {
	Ref<Font> font = get_theme_font(SNAME("font"));
	int font_size = get_theme_font_size(SNAME("font_size"));
	return Button::get_minimum_size() + Size2(0, font->get_height(font_size));
}

void EditorObjectSelector::_add_children_to_popup(Object *p_obj, int p_depth) {
	if (p_depth > 8) {
		return;
	}

	List<PropertyInfo> pinfo;
	p_obj->get_property_list(&pinfo);
	for (const PropertyInfo &E : pinfo) {
		if (!(E.usage & PROPERTY_USAGE_EDITOR)) {
			continue;
		}
		if (E.hint != PROPERTY_HINT_RESOURCE_TYPE) {
			continue;
		}

		Variant value = p_obj->get(E.name);
		if (value.get_type() != Variant::OBJECT) {
			continue;
		}
		Object *obj = value;
		if (!obj) {
			continue;
		}

		Ref<Texture2D> obj_icon = EditorNode::get_singleton()->get_object_icon(obj);

		String proper_name = "";
		Vector<String> name_parts = E.name.split("/");

		for (int i = 0; i < name_parts.size(); i++) {
			if (i > 0) {
				proper_name += " > ";
			}
			proper_name += name_parts[i].capitalize();
		}

		int index = sub_objects_menu->get_item_count();
		sub_objects_menu->add_icon_item(obj_icon, proper_name, objects.size());
		sub_objects_menu->set_item_indent(index, p_depth);
		objects.push_back(obj->get_instance_id());

		_add_children_to_popup(obj, p_depth + 1);
	}
}

void EditorObjectSelector::_show_popup() {
	if (sub_objects_menu->is_visible()) {
		sub_objects_menu->hide();
		return;
	}

	sub_objects_menu->clear();

	Size2 size = get_size();
	Point2 gp = get_screen_position();
	gp.y += size.y;

	sub_objects_menu->set_position(gp);
	sub_objects_menu->set_size(Size2(size.width, 1));

	sub_objects_menu->take_mouse_focus();
	sub_objects_menu->popup();
}

void EditorObjectSelector::_about_to_show() {
	Object *obj = ObjectDB::get_instance(history->get_path_object(history->get_path_size() - 1));
	if (!obj) {
		return;
	}

	objects.clear();

	_add_children_to_popup(obj);
	if (sub_objects_menu->get_item_count() == 0) {
		sub_objects_menu->add_item(TTR("No sub-resources found."));
		sub_objects_menu->set_item_disabled(0, true);
	}
}

void EditorObjectSelector::update_path() {
	for (int i = 0; i < history->get_path_size(); i++) {
		Object *obj = ObjectDB::get_instance(history->get_path_object(i));
		if (!obj) {
			continue;
		}

		Ref<Texture2D> obj_icon;
		if (Object::cast_to<MultiNodeEdit>(obj)) {
			obj_icon = EditorNode::get_singleton()->get_class_icon(Object::cast_to<MultiNodeEdit>(obj)->get_edited_class_name());
		} else {
			obj_icon = EditorNode::get_singleton()->get_object_icon(obj);
		}

		if (obj_icon.is_valid()) {
			current_object_icon->set_texture(obj_icon);
		}

		if (i == history->get_path_size() - 1) {
			String name;
			if (obj->has_method("_get_editor_name")) {
				name = obj->call("_get_editor_name");
			} else if (Object::cast_to<Resource>(obj)) {
				Resource *r = Object::cast_to<Resource>(obj);
				if (r->get_path().is_resource_file()) {
					name = r->get_path().get_file();
				} else {
					name = r->get_name();
				}

				if (name.is_empty()) {
					name = r->get_class();
				}
			} else if (obj->is_class("EditorDebuggerRemoteObject")) {
				name = obj->call("get_title");
			} else if (Object::cast_to<Node>(obj)) {
				name = Object::cast_to<Node>(obj)->get_name();
			} else if (Object::cast_to<Resource>(obj) && !Object::cast_to<Resource>(obj)->get_name().is_empty()) {
				name = Object::cast_to<Resource>(obj)->get_name();
			} else {
				name = obj->get_class();
			}

			current_object_label->set_text(name);
			set_tooltip_text(obj->get_class());
		}
	}
}

void EditorObjectSelector::clear_path() {
	set_disabled(true);
	set_tooltip_text("");

	current_object_label->set_text("");
	current_object_icon->set_texture(nullptr);
	sub_objects_icon->hide();
}

void EditorObjectSelector::enable_path() {
	set_disabled(false);
	sub_objects_icon->show();
}

void EditorObjectSelector::_id_pressed(int p_idx) {
	ERR_FAIL_INDEX(p_idx, objects.size());

	Object *obj = ObjectDB::get_instance(objects[p_idx]);
	if (!obj) {
		return;
	}

	EditorNode::get_singleton()->push_item(obj);
}

void EditorObjectSelector::_notification(int p_what) {
	switch (p_what) {
		case NOTIFICATION_ENTER_TREE:
		case NOTIFICATION_THEME_CHANGED: {
			update_path();

			int icon_size = get_theme_constant(SNAME("class_icon_size"), EditorStringName(Editor));

			current_object_icon->set_custom_minimum_size(Size2(icon_size, icon_size));
			current_object_label->add_theme_font_override("font", get_theme_font(SNAME("main"), EditorStringName(EditorFonts)));
			sub_objects_icon->set_texture(get_theme_icon(SNAME("arrow"), SNAME("OptionButton")));
			sub_objects_menu->add_theme_constant_override("icon_max_width", icon_size);
		} break;

		case NOTIFICATION_READY: {
			connect(SceneStringName(pressed), callable_mp(this, &EditorObjectSelector::_show_popup));
		} break;
	}
}

void EditorObjectSelector::_bind_methods() {
}

EditorObjectSelector::EditorObjectSelector(EditorSelectionHistory *p_history) {
	history = p_history;

	MarginContainer *main_mc = memnew(MarginContainer);
	main_mc->set_anchors_and_offsets_preset(PRESET_FULL_RECT);
	main_mc->add_theme_constant_override("margin_left", 4 * EDSCALE);
	main_mc->add_theme_constant_override("margin_right", 6 * EDSCALE);
	add_child(main_mc);

	HBoxContainer *main_hb = memnew(HBoxContainer);
	main_mc->add_child(main_hb);

	current_object_icon = memnew(TextureRect);
	current_object_icon->set_stretch_mode(TextureRect::STRETCH_KEEP_ASPECT_CENTERED);
	current_object_icon->set_expand_mode(TextureRect::EXPAND_IGNORE_SIZE);
	main_hb->add_child(current_object_icon);

	current_object_label = memnew(Label);
	current_object_label->set_text_overrun_behavior(TextServer::OVERRUN_TRIM_ELLIPSIS);
	current_object_label->set_h_size_flags(SIZE_EXPAND_FILL);
	current_object_label->set_auto_translate_mode(AUTO_TRANSLATE_MODE_DISABLED);
	main_hb->add_child(current_object_label);

	sub_objects_icon = memnew(TextureRect);
	sub_objects_icon->hide();
	sub_objects_icon->set_stretch_mode(TextureRect::STRETCH_KEEP_CENTERED);
	main_hb->add_child(sub_objects_icon);

	sub_objects_menu = memnew(PopupMenu);
	sub_objects_menu->set_auto_translate_mode(AUTO_TRANSLATE_MODE_DISABLED);
	add_child(sub_objects_menu);
	sub_objects_menu->connect("about_to_popup", callable_mp(this, &EditorObjectSelector::_about_to_show));
	sub_objects_menu->connect("id_pressed", callable_mp(this, &EditorObjectSelector::_id_pressed));

	set_tooltip_text(TTR("Open a list of sub-resources."));
}