/****************************************************************************
 Copyright (c) 2010-2012 cocos2d-x.org
 Copyright (c) 2008-2010 Ricardo Quesada
 Copyright (c) 2011      Zynga Inc.

 http://www.cocos2d-x.org

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
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 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:

 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.

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 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 ****************************************************************************/

/**
 * @class
 * @extends cc.Class
 */
cc.ActionTweenDelegate = cc.Class.extend(/** @lends cc.ActionTweenDelegate */{
     updateTweenAction:function(value, key){

     }
});

/**
 * cc.ActionTween
 * cc.ActionTween is an action that lets you update any property of an object.
 *
 * @class
 * @extends cc.ActionInterval
 * @example
 * //For example, if you want to modify the "width" property of a target from 200 to 300 in 2 seconds, then:
 *  var modifyWidth = cc.ActionTween.create(2,"width",200,300)
 *  target.runAction(modifyWidth);
 *
 * //Another example: cc.ScaleTo action could be rewriten using cc.PropertyAction:
 * // scaleA and scaleB are equivalents
 * var scaleA = cc.ScaleTo.create(2,3);
 * var scaleB = cc.ActionTween.create(2,"scale",1,3);
 */
cc.ActionTween = cc.ActionInterval.extend(/** @lends cc.ActionTween */{
    key:"",
    from:0,
    to:0,
    delta:0,

    ctor:function(){
        cc.ActionInterval.prototype.ctor.call(this);
        this.key = "";
        this.from = 0;
        this.to = 0;
        this.delta = 0;
    },

    /**
     * initializes the action with the property name (key), and the from and to parameters.
     * @param {Number} duration
     * @param {String} key
     * @param {Number} from
     * @param {Number} to
     * @return {Boolean}
     */
    initWithDuration:function (duration, key, from, to) {
        if (cc.ActionInterval.prototype.initWithDuration.call(this, duration)) {
            this.key = key;
            this.to = to;
            this.from = from;
            return true;
        }
        return false;
    },
    /**
     * @param {cc.Node} target
     */
    startWithTarget:function (target) {
        if(!target || !target.updateTweenAction)
            throw "cc.ActionTween.startWithTarget(): target must be non-null, and target must implement updateTweenAction function";
        cc.ActionInterval.prototype.startWithTarget.call(this, target);
        this.delta = this.to - this.from;
    },
    /**
     * @param {Number} dt
     */
    update:function (dt) {
        this._target.updateTweenAction(this.to - this.delta * (1 - dt), this.key);
    },
    /**
     * @return {cc.ActionTween}
     */
    reverse:function () {
        return cc.ActionTween.create(this.duration, this.key, this.to, this.from);
    },

    clone:function(){
        var action = new cc.ActionTween();
        action.initWithDuration(this._duration, this.key, this.from, this.to);
        return action;
    }
});

/**
 * Creates an initializes the action with the property name (key), and the from and to parameters.
 * @param {Number} duration
 * @param {String} key
 * @param {Number} from
 * @param {Number} to
 * @return {cc.ActionTween}
 */
cc.ActionTween.create = function (duration, key, from, to) {
    var ret = new cc.ActionTween();
    if (ret.initWithDuration(duration, key, from, to))
        return ret;
    return null;
};