/**************************************************************************/
/*  world_2d.cpp                                                          */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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#include "world_2d.h"

#include "core/config/project_settings.h"
#include "scene/2d/camera_2d.h"
#include "scene/2d/visible_on_screen_notifier_2d.h"
#include "scene/main/window.h"
#include "servers/navigation_server_2d.h"
#include "servers/physics_server_2d.h"
#include "servers/rendering_server.h"

RID World2D::get_canvas() const {
	return canvas;
}

RID World2D::get_space() const {
	if (space.is_null()) {
		space = PhysicsServer2D::get_singleton()->space_create();
		PhysicsServer2D::get_singleton()->space_set_active(space, true);
		PhysicsServer2D::get_singleton()->area_set_param(space, PhysicsServer2D::AREA_PARAM_GRAVITY, GLOBAL_GET("physics/2d/default_gravity"));
		PhysicsServer2D::get_singleton()->area_set_param(space, PhysicsServer2D::AREA_PARAM_GRAVITY_VECTOR, GLOBAL_GET("physics/2d/default_gravity_vector"));
		PhysicsServer2D::get_singleton()->area_set_param(space, PhysicsServer2D::AREA_PARAM_LINEAR_DAMP, GLOBAL_GET("physics/2d/default_linear_damp"));
		PhysicsServer2D::get_singleton()->area_set_param(space, PhysicsServer2D::AREA_PARAM_ANGULAR_DAMP, GLOBAL_GET("physics/2d/default_angular_damp"));
	}
	return space;
}

RID World2D::get_navigation_map() const {
	if (navigation_map.is_null()) {
		navigation_map = NavigationServer2D::get_singleton()->map_create();
		NavigationServer2D::get_singleton()->map_set_active(navigation_map, true);
		NavigationServer2D::get_singleton()->map_set_cell_size(navigation_map, GLOBAL_GET("navigation/2d/default_cell_size"));
		NavigationServer2D::get_singleton()->map_set_use_edge_connections(navigation_map, GLOBAL_GET("navigation/2d/use_edge_connections"));
		NavigationServer2D::get_singleton()->map_set_edge_connection_margin(navigation_map, GLOBAL_GET("navigation/2d/default_edge_connection_margin"));
		NavigationServer2D::get_singleton()->map_set_link_connection_radius(navigation_map, GLOBAL_GET("navigation/2d/default_link_connection_radius"));
	}
	return navigation_map;
}

PhysicsDirectSpaceState2D *World2D::get_direct_space_state() {
	return PhysicsServer2D::get_singleton()->space_get_direct_state(get_space());
}

void World2D::_bind_methods() {
	ClassDB::bind_method(D_METHOD("get_canvas"), &World2D::get_canvas);
	ClassDB::bind_method(D_METHOD("get_space"), &World2D::get_space);
	ClassDB::bind_method(D_METHOD("get_navigation_map"), &World2D::get_navigation_map);

	ClassDB::bind_method(D_METHOD("get_direct_space_state"), &World2D::get_direct_space_state);

	ADD_PROPERTY(PropertyInfo(Variant::RID, "canvas", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NONE), "", "get_canvas");
	ADD_PROPERTY(PropertyInfo(Variant::RID, "space", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NONE), "", "get_space");
	ADD_PROPERTY(PropertyInfo(Variant::RID, "navigation_map", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NONE), "", "get_navigation_map");
	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "direct_space_state", PROPERTY_HINT_RESOURCE_TYPE, "PhysicsDirectSpaceState2D", PROPERTY_USAGE_NONE), "", "get_direct_space_state");
}

void World2D::register_viewport(Viewport *p_viewport) {
	viewports.insert(p_viewport);
}

void World2D::remove_viewport(Viewport *p_viewport) {
	viewports.erase(p_viewport);
}

World2D::World2D() {
	canvas = RenderingServer::get_singleton()->canvas_create();
}

World2D::~World2D() {
	ERR_FAIL_NULL(RenderingServer::get_singleton());
	ERR_FAIL_NULL(PhysicsServer2D::get_singleton());
	ERR_FAIL_NULL(NavigationServer2D::get_singleton());
	RenderingServer::get_singleton()->free(canvas);
	if (space.is_valid()) {
		PhysicsServer2D::get_singleton()->free(space);
	}
	if (navigation_map.is_valid()) {
		NavigationServer2D::get_singleton()->free(navigation_map);
	}
}