/**
 * GameLib.D3.Shadow.Spot
 * @param graphics GameLib.GraphicsRuntime
 * @param apiSpotShadow
 * @constructor
 */
GameLib.D3.Shadow.Spot = function(
	graphics,
	apiSpotShadow
) {

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

    if (GameLib.Utils.UndefinedOrNull(apiSpotShadow)) {
        apiSpotShadow = {
            shadowType : GameLib.D3.API.Shadow.SHADOW_TYPE_SPOT
        };
    }

    GameLib.D3.API.Shadow.Spot.call(
        this,
        apiSpotShadow
    );

    if (this.camera instanceof GameLib.D3.API.Camera.Perspective) {
        this.camera = new GameLib.D3.Camera.Perspective(
            this.graphics,
            this.camera
        )
    }

    GameLib.D3.Shadow.call(
        this,
        this.graphics,
        apiSpotShadow
    );

};

GameLib.D3.Shadow.Spot.prototype = Object.create(GameLib.D3.Shadow.prototype);
GameLib.D3.Shadow.Spot.prototype.constructor = GameLib.D3.Shadow.Spot;

/**
 * Creates a shadow instance
 * @returns {*}
 */
GameLib.D3.Shadow.Spot.prototype.createInstance = function() {

    this.instance = {};

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

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

    if (property === 'camera') {

        console.warn('todo: updateInstance for directional shadow camera instance');

        return;
    }

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

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

    var apiShadow = GameLib.D3.Shadow.prototype.toApiObject.call(this);

    var apiSpotShadow = new GameLib.D3.API.Shadow.Spot(
        apiShadow
    );

    return apiSpotShadow;
};