/*************************************************************************/
/*  editor_path.cpp                                                      */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2017 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:                                             */
/*                                                                       */
/* 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  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/
#include "editor_path.h"
#include "editor_scale.h"
#include "editor_node.h"

void EditorPath::_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 (List<PropertyInfo>::Element *E=pinfo.front();E;E=E->next()) {

		if (!(E->get().usage&PROPERTY_USAGE_EDITOR))
			continue;
		if (E->get().hint!=PROPERTY_HINT_RESOURCE_TYPE)
			continue;

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

		Ref<Texture> icon;

		if (has_icon(obj->get_class(),"EditorIcons"))
			icon=get_icon(obj->get_class(),"EditorIcons");
		else
			icon=get_icon("Object","EditorIcons");

		int index = popup->get_item_count();
		popup->add_icon_item(icon,E->get().name.capitalize(),objects.size());
		popup->set_item_h_offset(index,p_depth*10*EDSCALE);
		objects.push_back(obj->get_instance_ID());

		_add_children_to_popup(obj,p_depth+1);
	}
}

void EditorPath::_input_event(const InputEvent& p_event) {

	if (p_event.type==InputEvent::MOUSE_BUTTON && p_event.mouse_button.button_index==BUTTON_LEFT && p_event.mouse_button.pressed) {


		Object *obj = ObjectDB::get_instance(history->get_path_object( history->get_path_size()-1));
		if (!obj)
			return;



		objects.clear();
		popup->clear();
		_add_children_to_popup(obj);
		popup->set_pos( get_global_pos() + Vector2(0,get_size().height));
		popup->set_size( Size2(get_size().width,1));
		popup->popup();
	}
}

void EditorPath::_notification(int p_what) {


	switch(p_what) {

		case NOTIFICATION_MOUSE_ENTER: {
			mouse_over=true;
			update();
		} break;
		case NOTIFICATION_MOUSE_EXIT: {
			mouse_over=false;
			update();
		} break;
		case NOTIFICATION_DRAW: {

			RID ci=get_canvas_item();
			Ref<Font> label_font = get_font("font","Label");
			Size2i size = get_size();
			Ref<Texture> sn = get_icon("SmallNext","EditorIcons");
			Ref<StyleBox> sb = get_stylebox("pressed","Button");


			int ofs=sb->get_margin(MARGIN_LEFT);

			if (mouse_over) {
				draw_style_box(sb,Rect2(Point2(),get_size()));
			}

			for(int i=0;i<history->get_path_size();i++) {

				Object *obj = ObjectDB::get_instance(history->get_path_object(i));
				if (!obj)
					continue;

				String type = obj->get_class();

				Ref<Texture> icon;

				if (has_icon(obj->get_class(),"EditorIcons"))
					icon=get_icon(obj->get_class(),"EditorIcons");
				else
					icon=get_icon("Object","EditorIcons");


				icon->draw(ci,Point2i(ofs,(size.height-icon->get_height())/2));

				ofs+=icon->get_width();

				if (i==history->get_path_size()-1) {
					//add name
					ofs+=4;
					int left = size.width - ofs;
					if (left<0)
						continue;
					String name;
					if (obj->cast_to<Resource>()) {

						Resource *r = obj->cast_to<Resource>();
						if (r->get_path().is_resource_file())
							name=r->get_path().get_file();
						else
							name=r->get_name();

						if (name=="")
							name=r->get_class();
					} else if (obj->cast_to<Node>()) {

						name=obj->cast_to<Node>()->get_name();
					} else if (obj->cast_to<Resource>() && obj->cast_to<Resource>()->get_name()!="") {
						name=obj->cast_to<Resource>()->get_name();
					} else {
						name=obj->get_class();
					}

					set_tooltip(obj->get_class());


					label_font->draw(ci,Point2i(ofs,(size.height-label_font->get_height())/2+label_font->get_ascent()),name,Color(1,1,1),left);
				} else {
					//add arrow

					//sn->draw(ci,Point2i(ofs,(size.height-sn->get_height())/2));
					//ofs+=sn->get_width();
					ofs+=5; //just looks better! somehow

				}
			}

		} break;
	}
}

void EditorPath::update_path() {


	update();
}

void EditorPath::_popup_select(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 EditorPath::_bind_methods() {

	ClassDB::bind_method("_input_event",&EditorPath::_input_event);
	ClassDB::bind_method("_popup_select",&EditorPath::_popup_select);
}

EditorPath::EditorPath(EditorHistory *p_history) {

	history=p_history;
	mouse_over=false;
	popup = memnew( PopupMenu );
	popup->connect("item_pressed",this,"_popup_select");
	add_child(popup);


}