/**
 * GameLib.D3.Camera.Stereo
 * @param graphics GameLib.GraphicsRuntime
 * @param apiStereoCamera
 * @constructor
 */
GameLib.D3.Camera.Stereo = function(
	graphics,
	apiStereoCamera
) {

    this.graphics = graphics;
    this.graphics.isNotThreeThrow();

    if (GameLib.Utils.UndefinedOrNull(apiStereoCamera)) {
        apiStereoCamera = {
            cameraType : GameLib.D3.API.Camera.CAMERA_TYPE_STEREO
        };
    }

    GameLib.D3.API.Camera.Stereo.call(
        this,
        apiStereoCamera,
        apiStereoCamera.stereoMode
    );

    GameLib.D3.Camera.call(
        this,
        this.graphics,
        this
    );
    
};

GameLib.D3.Camera.Stereo.prototype = Object.create(GameLib.D3.Camera.prototype);
GameLib.D3.Camera.Stereo.prototype.constructor = GameLib.D3.Camera.Stereo;

/**
 * Creates a camera instance
 * @returns {*}
 */
GameLib.D3.Camera.Stereo.prototype.createInstance = function() {

    this.instance = new THREE.PerspectiveCamera();

    var instance = new THREE.StereoCamera();

    for (var property in instance) {
        if (
            instance.hasOwnProperty(property) ||
            typeof instance[property] === 'function'
        ) {
            this.instance[property] = instance[property];
        }
    }

    GameLib.D3.Camera.prototype.createInstance.call(this);
};

/**
 * Updates the instance with the current state
 */
GameLib.D3.Camera.Stereo.prototype.updateInstance = function(property) {

    if (property === 'stereoMode') {
        console.warn('todo: update stereo mode');
        return;
    }

    GameLib.D3.Camera.prototype.updateInstance.call(this, property);
};

/**
 * Converts a GameLib.D3.Camera to a GameLib.D3.API.Camera
 * @returns {GameLib.D3.API.Camera}
 */
GameLib.D3.Camera.Stereo.prototype.toApiObject = function() {

    var apiCamera = GameLib.D3.Camera.prototype.toApiObject.call(this);

    var apiStereoCamera = new GameLib.D3.API.Camera.Stereo(
        apiCamera,
        this.stereoMode
    );

    return apiStereoCamera;
};