/**
 * Game Runtime
 * @param graphics GameLib.D3.Graphics
 * @param apiGame GameLib.D3.API.Game
 * @constructor
 */
GameLib.D3.Game = function (
    graphics,
    apiGame
) {

    this.graphics = graphics;
    this.graphics.isNotThreeThrow();
    
    GameLib.D3.API.Game.call(
        this,
		apiGame.id,
		apiGame.name,
		apiGame.gameType,
		apiGame.width,
		apiGame.height,
		apiGame.scenes,
		apiGame.cameras,
		apiGame.renderers,
		apiGame.composers,
		apiGame.systems,
		apiGame.entityManager,
		apiGame.mouse,
		apiGame.raycaster,
		apiGame.activeCameraIndex,
		apiGame.activeRendererIndex,
		apiGame.parentEntity
    );

    this.scenes = this.scenes.map(
        function(apiScene) {
            return GameLib.D3.Scene(
                this.graphics,
                apiScene
            )
        }.bind(this)
    );

    this.entityManager.entities.map(
        function (entity) {
            this.idToObject[entity.id] = entity;
            entity.components.map(
                function(component) {
                    if (component instanceof GameLib.Component) {
                        this.idToObject[component.id] = component;
                    }
                }.bind(this)
            )
        }.bind(this)
    );

    this.entityManager.linkObjects(this.idToObject);

    this.scenes = {};
};

GameLib.D3.Game.GAME_TYPE_VR_PONG   = 0x1;
GameLib.D3.Game.GAME_TYPE_VR_RACER  = 0x2;

GameLib.D3.Game.prototype.addScene = function(
    scene,
    identifer
) {
    this.scenes[identifer] = scene;
};

GameLib.D3.Game.prototype.processPhysics = function (
    dt
) {
    for(var s in this.scenes) {
        var scene = this.scenes[s];

        for(var w in scene.worlds) {
            var world = scene.worlds[w];
            world.step(dt);
        }
    }
};

GameLib.D3.Game.prototype.render = function(
    dt,
    renderer
) {
    for(var s in this.scenes) {
        var scene = this.scenes[s];
        scene.render(dt, renderer);
    }
};

GameLib.D3.Game.prototype.update = function(
    dt,
    fixedDt
) {
    for(var s in this.scenes) {
        var scene = this.scenes[s];

        for(var w in scene.worlds) {
            var world = scene.worlds[w];
            // NOTE: We are calling the step function with a variable timestep!
            world.step(fixedDt, dt);
        }

        scene.update(dt);
        scene.lateUpdate(dt);
    }
};