/*************************************************************************/
/*  area_2d.cpp                                                          */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* 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:                                             */
/*                                                                       */
/* 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,  */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/
#include "area_2d.h"
#include "scene/scene_string_names.h"
#include "servers/physics_2d_server.h"
void Area2D::set_space_override_mode(SpaceOverride p_mode) {

	space_override=p_mode;
	Physics2DServer::get_singleton()->area_set_space_override_mode(get_rid(),Physics2DServer::AreaSpaceOverrideMode(p_mode));


}
Area2D::SpaceOverride Area2D::get_space_override_mode() const{

	return space_override;
}

void Area2D::set_gravity_is_point(bool p_enabled){

	gravity_is_point=p_enabled;
	Physics2DServer::get_singleton()->area_set_param(get_rid(),Physics2DServer::AREA_PARAM_GRAVITY_IS_POINT,p_enabled);

}
bool Area2D::is_gravity_a_point() const{

	return gravity_is_point;
}

void Area2D::set_gravity_vector(const Vector2& p_vec){

	gravity_vec=p_vec;
	Physics2DServer::get_singleton()->area_set_param(get_rid(),Physics2DServer::AREA_PARAM_GRAVITY_VECTOR,p_vec);

}
Vector2 Area2D::get_gravity_vector() const{

	return gravity_vec;
}

void Area2D::set_gravity(real_t p_gravity){

	gravity=p_gravity;
	Physics2DServer::get_singleton()->area_set_param(get_rid(),Physics2DServer::AREA_PARAM_GRAVITY,p_gravity);
}
real_t Area2D::get_gravity() const{

	return gravity;
}

void Area2D::set_density(real_t p_density){

	density=p_density;
	Physics2DServer::get_singleton()->area_set_param(get_rid(),Physics2DServer::AREA_PARAM_DENSITY,p_density);
}
real_t Area2D::get_density() const{

	return density;
}

void Area2D::set_priority(real_t p_priority){

	priority=p_priority;
	Physics2DServer::get_singleton()->area_set_param(get_rid(),Physics2DServer::AREA_PARAM_PRIORITY,p_priority);
}
real_t Area2D::get_priority() const{

	return priority;
}


void Area2D::_body_enter_tree(ObjectID p_id) {

	Object *obj = ObjectDB::get_instance(p_id);
	Node *node = obj ? obj->cast_to<Node>() : NULL;
	ERR_FAIL_COND(!node);

	Map<ObjectID,BodyState>::Element *E=body_map.find(p_id);
	ERR_FAIL_COND(!E);
	ERR_FAIL_COND(E->get().in_tree);

	E->get().in_tree=true;
	emit_signal(SceneStringNames::get_singleton()->body_enter,node);
	for(int i=0;i<E->get().shapes.size();i++) {

		emit_signal(SceneStringNames::get_singleton()->body_enter_shape,p_id,node,E->get().shapes[i].body_shape,E->get().shapes[i].area_shape);
	}

}

void Area2D::_body_exit_tree(ObjectID p_id) {

	Object *obj = ObjectDB::get_instance(p_id);
	Node *node = obj ? obj->cast_to<Node>() : NULL;
	ERR_FAIL_COND(!node);
	Map<ObjectID,BodyState>::Element *E=body_map.find(p_id);
	ERR_FAIL_COND(!E);
	ERR_FAIL_COND(!E->get().in_tree);
	E->get().in_tree=false;
	emit_signal(SceneStringNames::get_singleton()->body_exit,node);
	for(int i=0;i<E->get().shapes.size();i++) {

		emit_signal(SceneStringNames::get_singleton()->body_exit_shape,p_id,node,E->get().shapes[i].body_shape,E->get().shapes[i].area_shape);
	}

}

void Area2D::_body_inout(int p_status,const RID& p_body, int p_instance, int p_body_shape,int p_area_shape) {

	bool body_in = p_status==Physics2DServer::AREA_BODY_ADDED;
	ObjectID objid=p_instance;

	Object *obj = ObjectDB::get_instance(objid);
	Node *node = obj ? obj->cast_to<Node>() : NULL;

	Map<ObjectID,BodyState>::Element *E=body_map.find(objid);

	ERR_FAIL_COND(!body_in && !E);

	locked=true;

	if (body_in) {
		if (!E) {

			E = body_map.insert(objid,BodyState());
			E->get().rc=0;
			E->get().in_tree=node && node->is_inside_tree();
			if (node) {
				node->connect(SceneStringNames::get_singleton()->enter_tree,this,SceneStringNames::get_singleton()->_body_enter_tree,make_binds(objid));
				node->connect(SceneStringNames::get_singleton()->exit_tree,this,SceneStringNames::get_singleton()->_body_exit_tree,make_binds(objid));
				if (E->get().in_tree) {
					emit_signal(SceneStringNames::get_singleton()->body_enter,node);
				}
			}

		}
		E->get().rc++;
		if (node)
			E->get().shapes.insert(ShapePair(p_body_shape,p_area_shape));


		if (!node || E->get().in_tree) {
			emit_signal(SceneStringNames::get_singleton()->body_enter_shape,objid,node,p_body_shape,p_area_shape);
		}

	} else {

		E->get().rc--;

		if (node)
			E->get().shapes.erase(ShapePair(p_body_shape,p_area_shape));

		bool eraseit=false;

		if (E->get().rc==0) {

			if (node) {
				node->disconnect(SceneStringNames::get_singleton()->enter_tree,this,SceneStringNames::get_singleton()->_body_enter_tree);
				node->disconnect(SceneStringNames::get_singleton()->exit_tree,this,SceneStringNames::get_singleton()->_body_exit_tree);
				if (E->get().in_tree)
					emit_signal(SceneStringNames::get_singleton()->body_exit,obj);

			}

			eraseit=true;

		}
		if (!node || E->get().in_tree) {
			emit_signal(SceneStringNames::get_singleton()->body_exit_shape,objid,obj,p_body_shape,p_area_shape);
		}

		if (eraseit)
			body_map.erase(E);

	}

	locked=false;


}


void Area2D::_clear_monitoring() {

	if (locked) {
		ERR_EXPLAIN("This function can't be used during the in/out signal.");
	}
	ERR_FAIL_COND(locked);

	Map<ObjectID,BodyState> bmcopy = body_map;
	body_map.clear();
	//disconnect all monitored stuff

	for (Map<ObjectID,BodyState>::Element *E=bmcopy.front();E;E=E->next()) {

		Object *obj = ObjectDB::get_instance(E->key());
		Node *node = obj ? obj->cast_to<Node>() : NULL;
		ERR_CONTINUE(!node);
		if (!E->get().in_tree)
			continue;

		for(int i=0;i<E->get().shapes.size();i++) {

			emit_signal(SceneStringNames::get_singleton()->body_exit_shape,E->key(),node,E->get().shapes[i].body_shape,E->get().shapes[i].area_shape);
		}

		emit_signal(SceneStringNames::get_singleton()->body_exit,obj);

		node->disconnect(SceneStringNames::get_singleton()->enter_tree,this,SceneStringNames::get_singleton()->_body_enter_tree);
		node->disconnect(SceneStringNames::get_singleton()->exit_tree,this,SceneStringNames::get_singleton()->_body_exit_tree);
	}

}

void Area2D::_notification(int p_what) {

	switch(p_what) {

		case NOTIFICATION_EXIT_TREE: {

			_clear_monitoring();
		} break;
	}

}


void Area2D::set_enable_monitoring(bool p_enable) {

	if (locked) {
		ERR_EXPLAIN("This function can't be used during the in/out signal.");
	}
	ERR_FAIL_COND(locked);

	if (p_enable==monitoring)
		return;

	monitoring=p_enable;

	if (monitoring) {

		Physics2DServer::get_singleton()->area_set_monitor_callback(get_rid(),this,"_body_inout");
	} else {
		Physics2DServer::get_singleton()->area_set_monitor_callback(get_rid(),NULL,StringName());
		_clear_monitoring();

	}
}

bool Area2D::is_monitoring_enabled() const {

	return monitoring;
}

Array Area2D::get_overlapping_bodies() const {

	ERR_FAIL_COND_V(!monitoring,Array());
	Array ret;
	ret.resize(body_map.size());
	int idx=0;
	for (const Map<ObjectID,BodyState>::Element *E=body_map.front();E;E=E->next()) {
		Object *obj = ObjectDB::get_instance(E->key());
		if (!obj) {
			ret.resize( ret.size() -1 ); //ops
		} else {
			ret[idx++]=obj;
		}

	}

	return ret;
}


void Area2D::_bind_methods() {

	ObjectTypeDB::bind_method(_MD("_body_enter_tree","id"),&Area2D::_body_enter_tree);
	ObjectTypeDB::bind_method(_MD("_body_exit_tree","id"),&Area2D::_body_exit_tree);

	ObjectTypeDB::bind_method(_MD("set_space_override_mode","enable"),&Area2D::set_space_override_mode);
	ObjectTypeDB::bind_method(_MD("get_space_override_mode"),&Area2D::get_space_override_mode);

	ObjectTypeDB::bind_method(_MD("set_gravity_is_point","enable"),&Area2D::set_gravity_is_point);
	ObjectTypeDB::bind_method(_MD("is_gravity_a_point"),&Area2D::is_gravity_a_point);

	ObjectTypeDB::bind_method(_MD("set_gravity_vector","vector"),&Area2D::set_gravity_vector);
	ObjectTypeDB::bind_method(_MD("get_gravity_vector"),&Area2D::get_gravity_vector);

	ObjectTypeDB::bind_method(_MD("set_gravity","gravity"),&Area2D::set_gravity);
	ObjectTypeDB::bind_method(_MD("get_gravity"),&Area2D::get_gravity);

	ObjectTypeDB::bind_method(_MD("set_density","density"),&Area2D::set_density);
	ObjectTypeDB::bind_method(_MD("get_density"),&Area2D::get_density);

	ObjectTypeDB::bind_method(_MD("set_priority","priority"),&Area2D::set_priority);
	ObjectTypeDB::bind_method(_MD("get_priority"),&Area2D::get_priority);

	ObjectTypeDB::bind_method(_MD("set_enable_monitoring","enable"),&Area2D::set_enable_monitoring);
	ObjectTypeDB::bind_method(_MD("is_monitoring_enabled"),&Area2D::is_monitoring_enabled);

	ObjectTypeDB::bind_method(_MD("get_overlapping_bodies"),&Area2D::get_overlapping_bodies);

	ObjectTypeDB::bind_method(_MD("_body_inout"),&Area2D::_body_inout);


	ADD_SIGNAL( MethodInfo("body_enter_shape",PropertyInfo(Variant::INT,"body_id"),PropertyInfo(Variant::OBJECT,"body"),PropertyInfo(Variant::INT,"body_shape"),PropertyInfo(Variant::INT,"area_shape")));
	ADD_SIGNAL( MethodInfo("body_exit_shape",PropertyInfo(Variant::INT,"body_id"),PropertyInfo(Variant::OBJECT,"body"),PropertyInfo(Variant::INT,"body_shape"),PropertyInfo(Variant::INT,"area_shape")));
	ADD_SIGNAL( MethodInfo("body_enter",PropertyInfo(Variant::OBJECT,"body")));
	ADD_SIGNAL( MethodInfo("body_exit",PropertyInfo(Variant::OBJECT,"body")));

	ADD_PROPERTYNZ( PropertyInfo(Variant::INT,"space_override",PROPERTY_HINT_ENUM,"Disabled,Combine,Replace"),_SCS("set_space_override_mode"),_SCS("get_space_override_mode"));
	ADD_PROPERTY( PropertyInfo(Variant::BOOL,"gravity_point"),_SCS("set_gravity_is_point"),_SCS("is_gravity_a_point"));
	ADD_PROPERTY( PropertyInfo(Variant::VECTOR2,"gravity_vec"),_SCS("set_gravity_vector"),_SCS("get_gravity_vector"));
	ADD_PROPERTY( PropertyInfo(Variant::REAL,"gravity",PROPERTY_HINT_RANGE,"-1024,1024,0.01"),_SCS("set_gravity"),_SCS("get_gravity"));
	ADD_PROPERTY( PropertyInfo(Variant::REAL,"density",PROPERTY_HINT_RANGE,"0,1024,0.001"),_SCS("set_density"),_SCS("get_density"));
	ADD_PROPERTYNZ( PropertyInfo(Variant::INT,"priority",PROPERTY_HINT_RANGE,"0,128,1"),_SCS("set_priority"),_SCS("get_priority"));
	ADD_PROPERTY( PropertyInfo(Variant::BOOL,"monitoring"),_SCS("set_enable_monitoring"),_SCS("is_monitoring_enabled"));

}

Area2D::Area2D() : CollisionObject2D(Physics2DServer::get_singleton()->area_create(),true) {

	space_override=SPACE_OVERRIDE_DISABLED;
	set_gravity(98);;
	set_gravity_vector(Vector2(0,1));
	gravity_is_point=false;
	density=0.1;
	locked=false;
	priority=0;
	monitoring=false;
	set_enable_monitoring(true);

}

Area2D::~Area2D() {


}