/*************************************************************************/
/*  room_instance.cpp                                                    */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2015 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 "room_instance.h"

#include "servers/visual_server.h"
 
#include "geometry.h"
#include "globals.h"
#include "scene/resources/surface_tool.h"


void Room::_notification(int p_what) {

	switch(p_what) {
		case NOTIFICATION_ENTER_WORLD: {
			// go find parent level
			Node *parent_room=get_parent();
			level=0;

			while(parent_room) {

				Room *r = parent_room->cast_to<Room>();
				if (r) {

					level=r->level+1;
					break;
				}

				parent_room=parent_room->get_parent();
			}


			if (sound_enabled)
				SpatialSoundServer::get_singleton()->room_set_space(sound_room,get_world()->get_sound_space());

		} break;
		case NOTIFICATION_TRANSFORM_CHANGED: {
			SpatialSoundServer::get_singleton()->room_set_transform(sound_room,get_global_transform());
		} break;
		case NOTIFICATION_EXIT_WORLD: {

			if (sound_enabled)
				SpatialSoundServer::get_singleton()->room_set_space(sound_room,RID());


		 } break;
	}

}


RES Room::_get_gizmo_geometry() const {

	DVector<Face3> faces;
	if (!room.is_null())
		faces=room->get_geometry_hint();

	int count=faces.size();
	if (count==0)
		return RES();

	DVector<Face3>::Read facesr=faces.read();

	const Face3* facesptr=facesr.ptr();

	DVector<Vector3> points;

	Ref<SurfaceTool> surface_tool( memnew( SurfaceTool ));

	Ref<FixedMaterial> mat( memnew( FixedMaterial ));

	mat->set_parameter( FixedMaterial::PARAM_DIFFUSE,Color(0.2,0.8,0.9,0.3) );
	mat->set_line_width(4);
	mat->set_flag(Material::FLAG_DOUBLE_SIDED,true);
	mat->set_flag(Material::FLAG_UNSHADED,true);
//	mat->set_hint(Material::HINT_NO_DEPTH_DRAW,true);

	surface_tool->begin(Mesh::PRIMITIVE_LINES);
	surface_tool->set_material(mat);

	for (int i=0;i<count;i++) {

		surface_tool->add_vertex(facesptr[i].vertex[0]);
		surface_tool->add_vertex(facesptr[i].vertex[1]);

		surface_tool->add_vertex(facesptr[i].vertex[1]);
		surface_tool->add_vertex(facesptr[i].vertex[2]);

		surface_tool->add_vertex(facesptr[i].vertex[2]);
		surface_tool->add_vertex(facesptr[i].vertex[0]);

	}

	return surface_tool->commit();
}



AABB Room::get_aabb() const {

	if (room.is_null())
		return AABB();

	return room->get_bounds().get_aabb();
}
DVector<Face3> Room::get_faces(uint32_t p_usage_flags) const {

	return DVector<Face3>();

}

void Room::set_room( const Ref<RoomBounds>& p_room ) {

	room=p_room;
	update_gizmo();

	if (room.is_valid()) {

		set_base(room->get_rid());
	} else {
		set_base(RID());
	}

	if (!is_inside_tree())
		return;


	propagate_notification(NOTIFICATION_AREA_CHANGED);
	update_gizmo();

	if (room.is_valid())
		SpatialSoundServer::get_singleton()->room_set_bounds(sound_room,room->get_bounds());


}

Ref<RoomBounds> Room::get_room() const {

	return room;
}

void Room::_parse_node_faces(DVector<Face3> &all_faces,const Node *p_node) const {

	const VisualInstance *vi=p_node->cast_to<VisualInstance>();

	if (vi) {
		DVector<Face3> faces=vi->get_faces(FACES_ENCLOSING);

		if (faces.size()) {
			int old_len=all_faces.size();
			all_faces.resize( all_faces.size() + faces.size() );
			int new_len=all_faces.size();
			DVector<Face3>::Write all_facesw=all_faces.write();
			Face3 * all_facesptr=all_facesw.ptr();

			DVector<Face3>::Read facesr=faces.read();
			const Face3 * facesptr=facesr.ptr();

			Transform tr=vi->get_relative_transform(this);

			for(int i=old_len;i<new_len;i++) {

				Face3 f=facesptr[i-old_len];
				for (int j=0;j<3;j++)
					f.vertex[j]=tr.xform(f.vertex[j]);
				all_facesptr[i]=f;
			}
		}
	}


	for (int i=0;i<p_node->get_child_count();i++) {

		_parse_node_faces(all_faces,p_node->get_child(i));
	}

}

void Room::compute_room_from_subtree() {


	DVector<Face3> all_faces;
	_parse_node_faces(all_faces,this);


	if (all_faces.size()==0)
		return;
	float error;
	DVector<Face3> wrapped_faces = Geometry::wrap_geometry(all_faces,&error);


	if (wrapped_faces.size()==0)
		return;

	BSP_Tree tree(wrapped_faces,error);

	Ref<RoomBounds> room( memnew( RoomBounds ) );
	room->set_bounds(tree);
	room->set_geometry_hint(wrapped_faces);

	set_room(room);

}



void Room::set_simulate_acoustics(bool p_enable) {

	if (sound_enabled==p_enable)
		return;

	sound_enabled=p_enable;
	if (!is_inside_world())
		return; //nothing to do

	if (sound_enabled)
		SpatialSoundServer::get_singleton()->room_set_space(sound_room,get_world()->get_sound_space());
	else
		SpatialSoundServer::get_singleton()->room_set_space(sound_room,RID());


}

void Room::_bounds_changed() {

	update_gizmo();
}

bool Room::is_simulating_acoustics() const {

	return sound_enabled;
}



RID Room::get_sound_room() const {

	return RID();
}

void Room::_bind_methods() {

	ObjectTypeDB::bind_method(_MD("set_room","room:Room"),&Room::set_room );
	ObjectTypeDB::bind_method(_MD("get_room:Room"),&Room::get_room );
	ObjectTypeDB::bind_method(_MD("compute_room_from_subtree"),&Room::compute_room_from_subtree);



	ObjectTypeDB::bind_method(_MD("set_simulate_acoustics","enable"),&Room::set_simulate_acoustics );
	ObjectTypeDB::bind_method(_MD("is_simulating_acoustics"),&Room::is_simulating_acoustics );



	ADD_PROPERTY( PropertyInfo( Variant::OBJECT, "room/room", PROPERTY_HINT_RESOURCE_TYPE, "Area" ), _SCS("set_room"), _SCS("get_room") );
	ADD_PROPERTY( PropertyInfo( Variant::BOOL, "room/simulate_acoustics"), _SCS("set_simulate_acoustics"), _SCS("is_simulating_acoustics") );
}


Room::Room() {

	sound_enabled=false;
	sound_room=SpatialSoundServer::get_singleton()->room_create();

	level=0;

}


Room::~Room() {

	SpatialSoundServer::get_singleton()->free(sound_room);
}