/**
 * "History" -- a wrapper class for unfocus's HistoryKeeper.  We use flash, and unfocus is
 * cool.  The FlashSuite is way too complicated, especially since ExternalInterface is on
 * the scene.  So, using ExternalInterface, and HistoryKeeper, we now have a super clean,
 * super easy to use Flash-Based-History-System.
 *
 * Thanks unfocus-history-keeper Team!
 *
 * Requirements:
 * 	unFocusHistory-p.js -- or any derivative of unfocus HistoryKeeper
 * 	History.js -- this javascript file
 * 	History.as -- the actionscript 2.0 class file
 *
 * Issues:
 *	safari dosent work.  bookmarking works fine, but setting unFocus.History.addHistory();
 *	does not register history states when it comes from flash.
 */

if(typeof thetainteractive == "undefined") var thetainteractive = new Object();
if(typeof thetainteractive.utilities == "undefined") thetainteractive.utilities = new Object();
if (typeof thetainteractive.utilities.History == "undefined") new function() {
    thetainteractive.utilities.History = this;
    /**
    * private _SWFID: String
    *	the id in the html for the flash object
    */
    var _SWFID;
    /**
    * private getSWFObject
    *	this is the recommended Macromedia method for finding the swf object for use
    *	with ExternalInterface
    *
    * @return Object
    *	returns the html entity that is the swf object that controls the history
    */
    function getSWFObject() {
        if (navigator.appName.indexOf("Microsoft") != -1) {
            //alert(_SWFID);
            return document[_SWFID];
        }
        else {
            //alert(_SWFID);
            return document[_SWFID];
        }
    }
    /**
    * private setBrowserState
    *	this sets the current state of the browser and flash
    *
    * @param hash:String
    *	the new hash string for the url
    */
    function setBrowserState(hash) {
        if (hash == "" || hash == "null" || hash == null || hash == undefined) return;
        getSWFObject().thetainteractive_utilities_History_setHistory(hash);
    }
    /**
    * public SWFID
    *	sets the id of the swf
    *
    * @param id:String
    *	the element id for the swf that controls the history
    */
    this.SWFID = function(id) {

        _SWFID = id;
    }
    /**
    * public listener
    *	event that listens to the history object
    *
    * @param hash:String
    *	the new hash string for the url
    */
    this.listener = function(hash) {
        setBrowserState(hash);
    };
    /**
    * public setHistory
    *	add a history state to the history.  this will in turn fire the listener
    *
    * @param hash:String
    *	the new hash string for the url
    */
    this.setHistory = function(hash) {
        if (hash == "" || hash == "null" || hash == null || hash == undefined) return;
        unFocus.History.addHistory(hash);
    };
    /**
    * public getHistory
    *	add a history state to the history.  this will in turn fire the listener
    *
    * @return:String
    *	the new hash string for the url
    */
    this.getHistory = function(hash) {
        return unFocus.History.getCurrent();
    };
    /**
    * subscribe to the historyChange event
    */
    unFocus.History.addEventListener('historyChange', this.listener);
}

/**
 * create a shortcut for this class
 */
var History = thetainteractive.utilities.History;