/**
 * @author Mat Groves http://matgroves.com/ @Doormat23
 */

/**
 * A MovieClip is a simple way to display an animation depicted by a list of textures.
 *
 * @class MovieClip
 * @extends Sprite
 * @constructor
 * @param textures {Array<Texture>} an array of {Texture} objects that make up the animation
 */
PIXI.MovieClip = function(textures)
{
    PIXI.Sprite.call(this, textures[0]);

    /**
     * The array of textures that make up the animation
     *
     * @property textures
     * @type Array
     */
    this.textures = textures;

    /**
     * The speed that the MovieClip will play at. Higher is faster, lower is slower
     *
     * @property animationSpeed
     * @type Number
     * @default 1
     */
    this.animationSpeed = 1;

    /**
     * Whether or not the movie clip repeats after playing.
     *
     * @property loop
     * @type Boolean
     * @default true
     */
    this.loop = true;

    /**
     * Function to call when a MovieClip finishes playing
     *
     * @property onComplete
     * @type Function
     */
    this.onComplete = null;

    /**
     * [read-only] The MovieClips current frame index (this may not have to be a whole number)
     *
     * @property currentFrame
     * @type Number
     * @default 0
     * @readOnly
     */
    this.currentFrame = 0;

    /**
     * [read-only] Indicates if the MovieClip is currently playing
     *
     * @property playing
     * @type Boolean
     * @readOnly
     */
    this.playing = false;
};

// constructor
PIXI.MovieClip.prototype = Object.create( PIXI.Sprite.prototype );
PIXI.MovieClip.prototype.constructor = PIXI.MovieClip;

/**
* [read-only] totalFrames is the total number of frames in the MovieClip. This is the same as number of textures
* assigned to the MovieClip.
*
* @property totalFrames
* @type Number
* @default 0
* @readOnly
*/
Object.defineProperty( PIXI.MovieClip.prototype, 'totalFrames', {
	get: function() {

		return this.textures.length;
	}
});


/**
 * Stops the MovieClip
 *
 * @method stop
 */
PIXI.MovieClip.prototype.stop = function()
{
    this.playing = false;
};

/**
 * Plays the MovieClip
 *
 * @method play
 */
PIXI.MovieClip.prototype.play = function()
{
    this.playing = true;
};

/**
 * Stops the MovieClip and goes to a specific frame
 *
 * @method gotoAndStop
 * @param frameNumber {Number} frame index to stop at
 */
PIXI.MovieClip.prototype.gotoAndStop = function(frameNumber)
{
    this.playing = false;
    this.currentFrame = frameNumber;
    var round = (this.currentFrame + 0.5) | 0;
    this.setTexture(this.textures[round % this.textures.length]);
};

/**
 * Goes to a specific frame and begins playing the MovieClip
 *
 * @method gotoAndPlay
 * @param frameNumber {Number} frame index to start at
 */
PIXI.MovieClip.prototype.gotoAndPlay = function(frameNumber)
{
    this.currentFrame = frameNumber;
    this.playing = true;
};

/*
 * Updates the object transform for rendering
 *
 * @method updateTransform
 * @private
 */
PIXI.MovieClip.prototype.updateTransform = function()
{
    PIXI.Sprite.prototype.updateTransform.call(this);

    if(!this.playing)return;

    this.currentFrame += this.animationSpeed;

    var round = (this.currentFrame + 0.5) | 0;

    if(this.loop || round < this.textures.length)
    {
        this.setTexture(this.textures[round % this.textures.length]);
    }
    else if(round >= this.textures.length)
    {
        this.gotoAndStop(this.textures.length - 1);
        if(this.onComplete)
        {
            this.onComplete();
        }
    }
};
