var EXANIMO = EXANIMO || {};
(function()
{
	EXANIMO.managers = EXANIMO.managers || {};
	var _initialized = false;
	var _checkInterval;
	var _method;
	var _swf;
	var _oldStateID;
	var _preventPageRefresh = false;
	var _iframeID = 'EXANIMO-managers-StateManager-iFrame';
	var _e;
	function _self()
	{
		return EXANIMO.managers.StateManager;
	}
	var _method = navigator.appName.indexOf('Microsoft Internet') != -1 ? 'IFRAME' : navigator.userAgent.indexOf('Safari') != -1 ? 'LINK' : 'HASH';
    function _getStateID()
    {

        return document.location.href.split('#')[1] || _self().defaultStateID;
    }; 		 		 		 		
	function _getSWF()
	{
		var tags = ['object', 'embed'];
		for (var i = 0; i < tags.length; i++)
		{
			var a = document.getElementsByTagName(tags[i]);
			for (var j = 0; j < a.length; j++)
			{
				if (a[j].dispatchStateChangeEvents)
				{
					return a[j];
				}			
			}	
		}
	};
    function _dispatchEvent(stateID, manual)
    {
 stateID = stateID || _self().defaultStateID;

        if (!_swf)
        {
        	//
        	// AJAX mode
        	//
        
	        _e = {id: stateID};
	        var f;

	        // If a handler is set, call it.
	        if (f = _self().onstatechange)
	        {
	        	_e.type = 'stateChange';
	            f(_e);
	        }
	
	        if (manual)
	        {
	            if (f = _self().onstateset)
	            {
	            	_e.type = 'stateSet';
	                f(_e);
	            }
	        }
	        else
	        {
	            if (f = _self().onstaterevisit)
	            {
	            	_e.type = 'stateRevisit';
	                f(_e);
	            }
	        }

	        _e = null;
	    }
        else if (!manual)
		{
			//
			// SWF mode
			//
            //alert(stateID);
			_swf.dispatchStateChangeEvents(stateID);
        }

       
    };

	var _setHash = (function()
	{
    	switch(_method)
        {
            case 'HASH':

				return function(stateID)
				{
                	document.location.hash = stateID == _self().defaultStateID ? '#' : stateID;
                	_oldStateID = stateID;
                };

            case 'IFRAME':

				return function(stateID)
				{
					_preventPageRefresh = true;
            		var iframe = document.getElementById(_iframeID);
                    frames[_iframeID].document.open();
                    frames[_iframeID].document.write('<script>parent.document.location.hash = "' + (stateID == _self().defaultStateID ? '#' : stateID) + '"; /* Wait for IE to impose its title before setting ours. */ setTimeout( function(){ parent.EXANIMO.managers.StateManager._updateIFrame("' + stateID + '"); }, 20);</script>');
                    frames[_iframeID].document.close();
				};

            case 'LINK':

				return function(stateID)
				{
                    _preventPageRefresh = true;

                    var a = document.createElement('a');
                    a.setAttribute('href', stateID == _self().defaultStateID ? '#' : '#' + stateID);

                    var evt = document.createEvent('MouseEvents');
                    evt.initEvent('click', true, true);
                    a.dispatchEvent(evt);

                    document.location.EXANIMO.managers.StateManager.stateList.push(stateID);
                };
        }
	})();
    EXANIMO.managers.StateManager = {

        CHECK_RATE: 500,
        onstatechange: null,
        onstateset: null,
        onstaterevisit: null,
        DEFAULT_STATE: 'defaultState',
        defaultStateID: 'defaultState',
        initialize: function(swf)
        {
        	if (_initialized) return;
            _initialized = true;
			_swf = swf == true ? _getSWF() : swf;

            switch(_method)
            {
                case 'HASH':

                    _oldStateID = _getStateID() == _self().defaultStateID ? _self().defaultStateID : null;
                    var checkForHashChange = function()
                    {
                        var stateID = _getStateID();

                        if (stateID != _oldStateID)
                        {
                            _oldStateID = stateID;
                            _dispatchEvent(stateID);
                        }
                    }

                    _checkInterval = setInterval(checkForHashChange, _self().CHECK_RATE);

                    break;

                case 'IFRAME':
					_preventPageRefresh = true;
                    var iframe = document.createElement('iframe');
                    iframe.setAttribute('src', 'about:blank');
                    iframe.setAttribute('name', _iframeID);
                    iframe.setAttribute('id', _iframeID);
                    iframe.style.visibility = 'hidden';
                    iframe.style.width = '0';
                    iframe.style.height = '0';
                    iframe.style.position = 'absolute';
                    iframe.style.overflow = 'hidden';
                    document.body.appendChild(iframe);
                    var stateID = _getStateID();
                    if (stateID != _self().defaultStateID)
                    {
                        setTimeout(
                            function()
                            {
                                _dispatchEvent(stateID)
                            },
                            0
                        );
                    }
                    frames[_iframeID].document.open();
                    if (stateID)
                        frames[_iframeID].document.write('<script>parent.document.location.hash = "' + (stateID == _self().defaultStateID ? '' : stateID) + '"; parent.EXANIMO.managers.StateManager._updateIFrame("' + stateID + '");</script>');
                    else
                        frames[_iframeID].document.write('<script>parent.document.location.hash = ""; parent.EXANIMO.managers.StateManager._updateIFrame();</script>');
                    frames[_iframeID].document.close();

                    break;

                case 'LINK':
                    document.location.EXANIMO = document.location.EXANIMO || {};
                    document.location.EXANIMO.managers = document.location.EXANIMO.managers || {};
                    document.location.EXANIMO.managers.StateManager = document.location.EXANIMO.managers.StateManager || {};
                    var loc = document.location.EXANIMO.managers.StateManager;
                    window.onunload = function()
                    {
                        loc.oldHistoryLength = -1;
                    }

                    if (loc.deepLink && loc.deepLink != _self().defaultStateID)
                    {
                    	loc.oldHistoryLength = -1;
						loc.deepLink = null;                   	
                    }
                    if (typeof loc.stateList == 'undefined')
                    {
                        loc.stateList = [_getStateID() || _self().defaultStateID];
                        loc.deepLink = loc.stateList[0];

                        loc.offset = history.length - 1;
                        while (loc.offset)
                        {
                            loc.stateList.unshift(null);
                            loc.offset--;
                        }
                        delete loc.offset;

                        loc.oldHistoryLength = document.location.hash ? -1 : history.length;

                    }
                   var checkForHistoryLengthChange = function() 
                    {
                        var loc = document.location.EXANIMO.managers.StateManager;

                        if (_preventPageRefresh)
                        {
                            _preventPageRefresh = false;
                            loc.oldHistoryLength = history.length;
                            return;
                        }

                        if (history.length != loc.oldHistoryLength)
                        {
                            var stateID = loc.stateList[history.length - 1];

                            _dispatchEvent(stateID)
                            loc.oldHistoryLength = history.length;
                        }
                    }

                    _checkInterval = setInterval(checkForHistoryLengthChange, _self().CHECK_RATE);

                    break;

            }
        },
        setState: function(stateID, title)
        {
            _self().setTitle('GESUNDHEIT UND WELLNESS 2010');
            if (_e) return;
        	_setHash(stateID);     			
        	_dispatchEvent(stateID, true);
        },		


        setTitle: function(title)
        {
            window.document.title = title || ' ';
        },


        _updateIFrame: function(stateID)
        {
			if (!_preventPageRefresh)
			{
				_dispatchEvent(stateID);
			}
			
			_preventPageRefresh = false;
        }

    }

})();