/**
 * GtfwAjax, wraps AdvAjax
 */
var GtfwAjaxBase = Base.extend( {
   replaceContent: function(el_id, content) {
      try {
         var el = document.getElementById(el_id);
         //to make any fade in
         anime.element = el_id;
      } catch(exp) {
         alert('Security issue: Unable to get element object(' + el_id + ')');
      }

      if (el) {
         // aplly JS, since it won't be automatically exec'd

				//$("div").filter("."+el_id).fadeOut(300,function(){anime.fadeIn();});
				//anime.fadeOut();
				anime.alpha(0);
			   el.innerHTML = content;
			   anime.fadeIn();
        
            
         this.applyXHRJs(el_id);
         // apply Behaviour
         if (Behaviour) // behaviour support, reapply rules for new content
            Behaviour.apply();

         // hides baloon
         if (BaloonManager)
            BaloonManager.hideBaloon();
      } else
         alert('cannot found: <div id="'+el_id+'">');
   },
   replaceContentWithUrl: function(el_id, url, headers) {
      if (!headers)
         headers = 'html';

      var self = this;
      self.el_id = el_id;
      eval('var this_callback = function(obj) { self.replaceContent("' + self.el_id + '", obj.responseText); }');
      this.xhrPost(url, this_callback, headers);
   },
   postFormReplace: function(el_id, dest_id) {
      var el = document.getElementById(el_id);
      var self = this;
      self.dest_id = dest_id;
      eval('var this_callback = function(obj) { self.replaceContent("' + self.dest_id + '", obj.responseText); }');

      advAJAX.submit(document.getElementById(el_id), {
         onInitialization: function() {
            // loading status support
            if (XhrStatus)
               XhrStatus.start('loading-box-active', 50);
         },
         mimeType: 'text/plain',
         onSuccess: function(obj) {
            // loading status support
            if (XhrStatus) XhrStatus.stop("loading-box-active", 100);
            this_callback(obj);
         },
         onError: function(obj) {
            // unauthorized or cookie has been expired
            if (obj.status == 401) {
               var redir = obj.xmlHttpRequest.getResponseHeader('Location');
               if (redir) {
                  document.location.href = redir;
               } else {
                  alert('Sorry, we encountered an HTTP 401 Unauthorized access!');
               }
            }
         },
         headers: {'X-GtfwXhrRequestSignature': new Date().toString()}
      });
   },
   postForm: function(el_id, callback, headers) {      
      var el = document.getElementById(el_id);
      if (!headers)
         headers = {'X-GtfwModuleType': 'html'};
      else
         headers = {'X-GtfwModuleType': headers}

      headers['X-GtfwXhrRequestSignature'] = new Date().toString();
      
      //History.saveState(src)

      if (callback) {
         advAJAX.submit(document.getElementById(el_id), {
            onInitialization : function() {
               // loading status support
               if (XhrStatus)
                  XhrStatus.start('loading-box-active', 50);
            },
            headers: headers,
            mimeType: 'text/plain',
            onSuccess: function(obj) {
               // loading status support
               if (XhrStatus) XhrStatus.stop("loading-box-active", 100);
               eval(callback + '(obj);');
            },
            onError: function(obj) {
               // unauthorized or cookie has been expired
               if (obj.status == 401) {
                  var redir = obj.xmlHttpRequest.getResponseHeader('Location');
                  if (redir) {
                     document.location.href = redir;
                  } else {
                     alert('Sorry, we encountered an HTTP 401 Unauthorized access!');
                  }
               }
            }
         });
      } else {
         advAJAX.submit(document.getElementById(el_id), {
            onInitialization : function() {
               // loading status support
               if (XhrStatus)
                  XhrStatus.start('loading-box-active', 50);
            },
            headers: headers,
            mimeType: 'text/plain',
            onSuccess: function(obj) {
               // loading status support
               if (XhrStatus) XhrStatus.stop("loading-box-active", 100);
               GtfwAjax.defCallback(obj);
            },
            onError: function(obj) {
               // unauthorized or cookie has been expired
               if (obj.status == 401) {
                  var redir = obj.xmlHttpRequest.getResponseHeader('Location');
                  if (redir) {
                     document.location.href = redir;
                  } else {
                     alert('Sorry, we encountered an HTTP 401 Unauthorized access!');
                  }
               }
            }
         });
      }
   },
   xhrGet: function(src, the_callback, str_headers) {
      GtfwAjax.__xhrGet(src, the_callback, str_headers);
      //if (typeof History == 'object')
        // History.pushStack(this, this.__xhrGet, [src, the_callback, str_headers], src);
   },
   __xhrGet: function(src, the_callback, str_headers) {
      var headers = new Object();
      
      if (!str_headers)
         headers = {'X-GtfwModuleType': 'html'};
      else
         headers = {'X-GtfwModuleType': str_headers};

      headers['X-GtfwXhrRequestSignature'] = new Date().toString();

      advAJAX.get({
         url: src,
         onInitialization: function() {
            // loading status support
            if (XhrStatus)
               XhrStatus.start('loading-box-active', 50);
         },
         headers: headers,
         mimeType: 'text/plain',
         onSuccess: function(obj) {
            the_callback(obj);
            // loading status support
            if (XhrStatus) XhrStatus.stop("loading-box-active", 100);
         },
         onError: function(obj) {
            // unauthorized or cookie has been expired
            if (obj.status == 401) {
               var redir = obj.xmlHttpRequest.getResponseHeader('Location');
               if (redir) {
                  document.location.href = redir;
               } else {
                  alert('Sorry, we encountered an HTTP 401 Unauthorized access!');
               }
            }
         }
      });
   },
   xhrPost: function(src, the_callback, str_headers) {
      
      this.__xhrPost(src, the_callback, str_headers);
      //if (typeof History == 'object')
        // History.pushStack(this, this.__xhrPost, [src, the_callback, str_headers], src);
   },
   __xhrPost: function(src, the_callback, str_headers) {
      var headers = new Object();
      if (!str_headers)
         headers = { 'X-GtfwModuleType' : 'html'};
      else
         headers = { 'X-GtfwModuleType' : str_headers};

      headers['X-GtfwXhrRequestSignature'] = new Date().toString();

      advAJAX.post({
         url: src,
         onInitialization: function() {
            // loading status support
            if (XhrStatus)
               XhrStatus.start('loading-box-active', 50);
         },
         headers: headers,
         mimeType: 'text/plain',
         onSuccess: function(obj) {
               the_callback(obj);
               // loading status support
               if (XhrStatus) XhrStatus.stop("loading-box-active", 100);
         },
         onError: function(obj) {
            // unauthorized or cookie has been expired
            if (obj.status == 401) {
               var redir = obj.xmlHttpRequest.getResponseHeader('Location');
               if (redir) {
                  document.location.href = redir;
               } else {
                  alert('Sorry, we encountered an HTTP 401 Unauthorized access!');
               }
            }
         }
      });
   },
   applyXHRJs: function(el_id) {
      var bSaf = (navigator.userAgent.indexOf('Safari') != -1);
      var bOpera = (navigator.userAgent.indexOf('Opera') != -1);
      var bMoz = (navigator.appName == 'Netscape');
      var node = document.getElementById(el_id);
      var st = node.getElementsByTagName('SCRIPT');
      var strExec;

      /* http://microformats.org/wiki/rest/ahah with eval tips from: http://service.zimki.com/user/blog/tomi/2006/08/07/javascript-eval
      /// NOTICE:
      /// Always use "/ * * /" comment instead of "//" within loaded html/js since it will be eval'd in one line.
      */

      for(var i = 0; i<st.length; i++) {
         if (bSaf) {
            strExec = st[i].innerHTML;
         }
         else if (bOpera) {
            strExec = st[i].text;
         }
         else if (bMoz) {
            strExec = st[i].textContent;
         }
         else {
            strExec = st[i].text;
         }
         try {
            self.eval(strExec);
         } catch(e) {
            alert(e + "\nMake sure you have use \\* *\\ style of comment instead of \\\\");
            alert('code was: ' + strExec);
         }
      }
   },
   defCallback: function(obj) {            
      eval("result = " + obj.responseText + ";");
      if (result['exec']) {
         eval(result['exec'] + ";");
      }
   },
   loadUrl: function(theurl, the_callback, headers) {
      if (!headers)
         headers = { 'X-GtfwModuleType' : 'html'};
      else
         headers = { 'X-GtfwModuleType' : headers};

      headers['X-GtfwXhrRequestSignature'] = new Date().toString();

      //History.saveState(src);

      if (the_callback) {
         advAJAX.get({
            url: theurl,
            onInitialization: function() {
               // loading status support
               if (XhrStatus)
                  XhrStatus.start('loading-box-active', 50);
            },
            headers: headers,
            mimeType: 'text/plain',
            onSuccess: function(obj) {
               // loading status support
               if (XhrStatus) XhrStatus.stop("loading-box-active", 100);
               the_callback(obj);
            },
            onError: function(obj) {
               // unauthorized or cookie has been expired
               if (obj.status == 401) {
                  var redir = obj.xmlHttpRequest.getResponseHeader('Location');
                  if (redir) {
                     document.location.href = redir;
                  } else {
                     alert('Sorry, we encountered an HTTP 401 Unauthorized access!');
                  }
               }
            }
         });
      } else {
         advAJAX.get({
            url: theurl,
            onInitialization: function() {
               // loading status support
               if (XhrStatus)
                  XhrStatus.start('loading-box-active', 50);
            },
            headers: headers,
            mimeType: 'text/plain',
            onSuccess: function(obj) {
               // loading status support
               if (XhrStatus) XhrStatus.stop("loading-box-active", 100);
               GtfwAjax.defCallback(obj);
            },
            onError: function(obj) {
               // unauthorized or cookie has been expired
               if (obj.status == 401) {
                  var redir = obj.xmlHttpRequest.getResponseHeader('Location');
                  if (redir) {
                     document.location.href = redir;
                  } else {
                     alert('Sorry, we encountered an HTTP 401 Unauthorized access!');
                  }
               }
            }
         });
      }
   },
   waitOn: function(elm) {
      var el = document.getElementById(elm);
      var org_src = document.getElementById("loading-box-active");
      if (el) {
         el.innerHTML = '<div id="loading-box-active"/>&nbsp;</div><b>WAITING...</b>' + org_src.innerHTML; /// FIXME: hardcoded wait signal
      }
   }
}
);

var GtfwAjax = new GtfwAjaxBase();

/**
 * XhrStatus, shows XHR status
 */
var XhrStatus = {
   taskCount: 0,
   isFadingOut: false,
   isFadingIn: false,
   fadeStage: 0,
   increaseTask: function() {
      this.taskCount += 1;
   },
   decreaseTask: function() {
      this.taskCount -= 1;
   },
   start: function(el_id, delay) {
      this.increaseTask();
      if (this.taskCount == 1)
         this.fadeStage = 0;
      var el = document.getElementById(el_id);
      if (el) {
         // fade out
         if (this.taskCount == 1) { // init loading
            //setTimeout('xhrFadeOut("' + el_id + '", '+ delay +')', delay);
            setTimeout('XhrStatus.fadeOut("' + el_id + '", '+ delay +')', delay);
            this.isFadingOut = true;
         }
      }
   },
   fadeOut: function(el_id, delay) {
	   var rad = 1.5707963267948966;
      if (this.fadeStage>100) {
         this.fadeStage = 0;
         this.isFadingOut = false;
      } else if (this.taskCount > 0) {
         var el = document.getElementById(el_id);
		   el.style.opacity=Math.sin((this.fadeStage/100)*rad);
         el.style.visibility = "visible";
         this.fadeStage+=10;
         //setTimeout('xhrFadeOut("' + el_id + '", '+ delay +')', delay);
         setTimeout('XhrStatus.fadeOut("' + el_id + '", '+ delay +')', delay);
      }
   },
   stop: function(el_id, delay) {
      var self = this;
      this.decreaseTask();
      var el = document.getElementById(el_id);
      if (el) {
         if (this.taskCount == 0) {
            //setTimeout('xhrFadeIn("' + el_id + '", '+ delay +')', delay);
            setTimeout('XhrStatus.fadeIn("' + el_id + '", '+ delay +')', delay);
            this.isFadingIn = true;
         }
      }
   },
   fadeIn: function(el_id, delay) {
      var self = this;
      var el = document.getElementById(el_id);
      if (this.fadeStage > 100) {
         this.fadeStage = 0;
         this.isFadingIn = false;
      } else if (this.taskCount < 1) {
         el.style.opacity= (100 - this.fadeStage) / 100;
         this.fadeStage+=10;
         //setTimeout('xhrFadeIn("' + el_id + '", '+ delay +')', delay);
         setTimeout('XhrStatus.fadeIn("' + el_id + '", '+ delay +')', delay);
      }
   }
}

/*
Back Button Fixxerrrr
was http://codinginparadise.org/weblog/2005/08/ajax-tutorial-saving-session-across.html
but later changed into anchor based history
*/

var HistoryBase = Base.extend( {
   currentState: 0,
   maxState: 0,
   HistoryStack: [],
   isJumping: false,
   log: function(msg) {
      if (console)
         console.log('GtfwJsLog>> ' + msg);
   },
   initialize: function () {
      if (this.observe()) // handl bookmark like URL
         return;

      var initObj = {setLocation: function(x) {/*alert('0');*/ document.location.href = x;}};
      this.log('initialize: ' + document.location.href.replace(/#.*/, ''));
      this.pushStack(initObj, initObj.setLocation, [document.location.href.replace(/#.*/, '')], document.location.href.replace(/#.*/, ''));

   },
   pushStack: function(obj, func, args, unique_url) {
      this.currentState++;
      this.HistoryStack[this.currentState] = { 'obj': obj, 'func': func, 'args': args, unique: unique_url };
      this.maxState = this.currentState;
      this.saveState({state: this.currentState, data: unique_url});
   },
   execCurrentStack: function (stack_idx) {
      //this.HistoryStack[this.currentState].func.apply(this.HistoryStack[this.currentState].obj, this.HistoryStack[this.currentState].args);
      if (typeof this.HistoryStack[stack_idx] == 'object')
         this.HistoryStack[this.currentState].func.apply(this.HistoryStack[stack_idx].obj, this.HistoryStack[stack_idx].args);
      else
         this.log('nothing to exec in HistoryStack[' + stack_idx + ']');
   },
   saveState: function (message) {
      // url hash history
      var url =document.location.href;
      this.log('saveState::currentURL = ' + url);
      //alert('iframe: ' + url)
      var hash = this.createHash(message.state, message.data);
//       if (/#/.test(url))
//          url = url.replace(/#.*/, '#' + hash);
//       else
         url = url.replace(/#.*/, '');
         url += '#' + hash;

      this.log('saveState: ' + url);
      document.location.href = url;
   },
   observe: function() {
      if (this.isJumping) {
         this.log("Is jumping, don't observe yet!");
         return;
      }
      var url =document.location.href;
      if (/#/.test(url)) {
         var hash = /(.*?)#(.*)/.exec(url);
         if (hash != null) {
            var newState = this.extractHash(hash[2]);
            if (newState != false) {
               this.notify(newState[0], newState[1]);
               return true;
            }
         }
      }
      return false;
   },
   notify: function(state, unique_url) {
      //this.log('HistoryStack[state]: ' + this.HistoryStack[state]);
      if ((this.HistoryStack[state] == null) || (this.HistoryStack[state].unique != unique_url)) {
         // Bookmark jump!!!
         //this.log('HistoryStack unique_url: ' + this.HistoryStack[state].unique);
         this.log('should jump to: ' + unique_url);
         //var hash = this.extractHash(unique_url);

         unique_url = unique_url.replace(/ascomponent=\d+/, '');
         this.isJumping = true; // don't observe while jumping;
         document.location.href = unique_url;
         return;
      } else
      if (state != this.currentState) {
         this.currentState = state;
         this.log('Should exec state: #'+state);
         this.execCurrentStack(state);
      }
   },
   extractHash: function(str) {
      var match = /hash=(.*)&data=(.*)/.exec(str);
      if (match != null) {
         return [match[1], unescape(match[2])];
      } else
         return false;
   },
   createHash: function(state, data) {
      // remove ascomponent from data
      //data = data.replace(/ascomponent=\d+/, '');
      var hash = 'hash=' + state + '&data=' + escape(data);
      this.log('creating hash: ' + hash);
      return hash;
   }
});

//var History =  new HistoryBase();

function initFunc () {
//    alert('doc loaded');
   History.initialize();
   window.setInterval('History.observe()', 1500);
}

// FormHelperManager.addLoadEvent(initFunc);