/**
* Animation
*
* An Animation instance contains a single animation and the controls to play it.
* It is created by the AnimationManager and belongs to Game Objects such as Sprite.
*
* @package    Phaser.Animation
* @author     Richard Davey <rich@photonstorm.com>
* @copyright  2013 Photon Storm Ltd.
* @license    https://github.com/photonstorm/phaser/blob/master/license.txt  MIT License
*
* @param parent {Sprite} Owner sprite of this animation.
* @param frameData {FrameData} The FrameData object contains animation data.
* @param name {string} Unique name of this animation.
* @param frames {number[]/string[]} An array of numbers or strings indicating what frames to play in what order.
* @param delay {number} Time between frames in ms.
* @param looped {bool} Whether or not the animation is looped or just plays once.
*/
Phaser.Animation = function (game, parent, frameData, name, frames, delay, looped) {

	this.game = game;
	this._parent = parent;
	this._frames = frames;
	this._frameData = frameData;
	this.name = name;
	this.delay = 1000 / delay;
	this.looped = looped;
	this.isFinished = false;
	this.isPlaying = false;
	this._frameIndex = 0;
	this.currentFrame = this._frameData.getFrame(this._frames[this._frameIndex]);
	
};

Phaser.Animation.prototype = {

	/**
    * Play this animation.
    * @param frameRate {number} FrameRate you want to specify instead of using default.
    * @param loop {bool} Whether or not the animation is looped or just plays once.
    */
    play: function (frameRate, loop) {

        frameRate = frameRate || null;
        loop = loop || null;

        if (frameRate !== null)
        {
            this.delay = 1000 / frameRate;
        }

        if (loop !== null)
        {
            //  If they set a new loop value then use it, otherwise use the default set on creation
            this.looped = loop;
        }

        this.isPlaying = true;
        this.isFinished = false;

        this._timeLastFrame = this.game.time.now;
        this._timeNextFrame = this.game.time.now + this.delay;

        this._frameIndex = 0;

        this.currentFrame = this._frameData.getFrame(this._frames[this._frameIndex]);
		this._parent.setTexture(PIXI.TextureCache[this.currentFrame.uuid]);
        this._parent.events.onAnimationStart.dispatch(this._parent, this);

        return this;

    },

	/**
    * Play this animation from the first frame.
    */
    restart: function () {

        this.isPlaying = true;
        this.isFinished = false;

        this._timeLastFrame = this.game.time.now;
        this._timeNextFrame = this.game.time.now + this.delay;

        this._frameIndex = 0;

        this.currentFrame = this._frameData.getFrame(this._frames[this._frameIndex]);

    },

	/**
    * Stop playing animation and set it finished.
    */
    stop: function () {

        this.isPlaying = false;
        this.isFinished = true;

    },

	/**
    * Update animation frames.
    */
    update: function () {

        if (this.isPlaying == true && this.game.time.now >= this._timeNextFrame)
        {
            this._frameIndex++;

            if (this._frameIndex == this._frames.length)
            {
                if (this.looped)
                {
                    this._frameIndex = 0;
                    this.currentFrame = this._frameData.getFrame(this._frames[this._frameIndex]);
                    this._parent.setTexture(PIXI.TextureCache[this.currentFrame.uuid]);
                    this._parent.events.onAnimationLoop.dispatch(this._parent, this);
                }
                else
                {
                    this.onComplete();
                }
            }
            else
            {
                this.currentFrame = this._frameData.getFrame(this._frames[this._frameIndex]);
				this._parent.setTexture(PIXI.TextureCache[this.currentFrame.uuid]);
            }

            this._timeLastFrame = this.game.time.now;
            this._timeNextFrame = this.game.time.now + this.delay;

            return true;
        }

        return false;

    },

	/**
    * Clean up animation memory.
    */
    destroy: function () {

        this.game = null;
        this._parent = null;
        this._frames = null;
        this._frameData = null;
        this.currentFrame = null;
        this.isPlaying = false;

    },

	/**
    * Animation complete callback method.
    */
    onComplete: function () {

        this.isPlaying = false;
        this.isFinished = true;
        this._parent.events.onAnimationComplete.dispatch(this._parent, this);

    }

};

Object.defineProperty(Phaser.Animation.prototype, "frameTotal", {

    get: function () {
        return this._frames.length;
    },

    enumerable: true,
    configurable: true

});

Object.defineProperty(Phaser.Animation.prototype, "frame", {

    get: function () {

        if (this.currentFrame !== null)
        {
            return this.currentFrame.index;
        }
        else
        {
            return this._frameIndex;
        }

    },

    set: function (value) {

        this.currentFrame = this._frameData.getFrame(value);

        if (this.currentFrame !== null)
        {
            this._frameIndex = value;
			this._parent.setTexture(PIXI.TextureCache[this.currentFrame.uuid]);
        }

    },

    enumerable: true,
    configurable: true

});