var Analytics = Class.create({
    subscribers : {},
    listeners : {},
    fromConfigListeners : [],
    seenMemoWithTag : {},
    isEnabled: false,
    enabledModules: new Array(),
    bvLoaded: 0,
    uniqueEvents: [],
    lastQVloc: '',
    lastQVkey: '',
    currentTags: [],

    RPC_METHODS_ALLOWED: new Hash({
        "prodcat" : 1,
        "generic" : 1,
        "cart" : 1,
        "rpc.form" : 1,
        "search" : 1,
        "email.signup" : 1
    }),

    initialize: function(modules,enabled){
        this._addStaticListeners();
    },
    addPendingTags: function(newTags ){
        this.pendingTags = newTags;
        this.execTags();
        return this;
    },
    _addStaticListeners: function(){
        var self = this;
        document.observe("dom:loaded", function(){

           self.isEnabled = (typeof ANALYTICS_ENABLED != "undefined") ? ANALYTICS_ENABLED : false;
           self.enabledModules = (typeof ANALYTICS_MODULES != "undefined" ) ? ANALYTICS_MODULES : [];

           // CONVERSION EVENTS - If conversion events exist add handler as directed and form input for location 
           self.jsEvents = (typeof CONVERSION_EVENTS != "undefined" ) ? CONVERSION_EVENTS : [];
           self.jsEvents = self.jsEvents.concat( (typeof JS_EVENTS != "undefined" ) ? JS_EVENTS : [] );  
           self.jsPixelEvents = (typeof JS_PIXEL_EVENTS != "undefined" ) ? JS_PIXEL_EVENTS : new Object();        

           if (Object.keys(self.jsPixelEvents).length > 0){                                                      
               Object.keys(self.jsPixelEvents).each(function(module){
                   self.jsPixelEvents[module].each(function(CEVENT){
                       self.jsEvents = self.jsEvents.concat( (typeof CEVENT != "undefined" ) ? CEVENT : [] );
                   });
               });
           }

            if (typeof self.jsEvents != "undefined"){
                self.jsEventsWaited = [];

                self.jsEvents.each(function(CEVENT){
                    CEVENT.hookIds = [];  // allow for mapping one event to many elements
                    //console.log("event on ", CEVENT); 
                    //Check for events to wait on, loading iframes, bv etc to be custom handled in static listeners
                    //if the ele is expected to exist on load, then the event handlers can be set up right away in addFrontendEvent

                    if (CEVENT.after){
                        self.jsEventsWaited.push(CEVENT);
                    }else{                    
                        self._addFrontendEvent(CEVENT); 
                    } 
                    
                }); 
            }
          
   
            $$('[locurl]').invoke('observe', 'click', function(e) {
                  params = {};
                  if (e.target){
                  loc = e.target.readAttribute('locurl');
                  if (loc){
                    location_params = loc.split(",");
                    params['TYPE_LOCATION'] = location_params[0];
                    params['PRODUCT_KEY'] = location_params[1];
                  }

                  if (params['TYPE_LOCATION']){
                      console.log("GOT LOC from attr in cart",e,params['TYPE_LOCATION']);
                      el.productView.reportProductView(params);
                  }else{
                     if (typeof Analytics == "object"){
                         loc = Analytics.findAttrUp(e.target,'locurl');
                         if (loc){
                             location_params = loc.split(",");
                             params['TYPE_LOCATION'] = location_params[0];
                             params['PRODUCT_KEY'] = location_params[1];
                             params['URL_CLICK'] = 1;
                             console.log("Prod view from loc attr",params['TYPE_LOCATION']);
                             el.productView.reportProductView(params);
                         }
                      }
                  }
               }

             });
           
 
        });

        //Search hook for frontend and soon Endeca
        document.observe("search:results", function(event){
            var res = event.memo;
            self.addPendingTags({"CoreMetrics":{"dom:loaded":[{"params":[res.pageid,res.keywords,res.cat,'"' + res.count +'"',null],"tag":"cmCreatePageviewTag"}]}});
        });

        // BV loaded and ready this is just a place to handle the event, tags come from the backend config. 
        document.observe("bv:loaded", function(){
            if (self.bvLoaded == 1){
               return;
            }else{
               self.bvLoaded = 1;
            }
            // console.log("BV IS LOADED",self.jsEventsWaited);
            self.jsEventsWaited.each(function(EVENT){
               if (EVENT.after && EVENT.after == 'bv:loaded'){
                   self._addFrontendEvent(EVENT); 
               } 
            }); 

        });
        document.observe("bv:created", function(){
              // console.log("BV CREATED IS LOADED",self.jsEventsWaited);
            self.jsEventsWaited.each(function(EVENT){
               if (EVENT.after && EVENT.after == 'bv:created'){
                   self._addFrontendEvent(EVENT);
               }
            });

        });
        document.observe("MPP:productQV", function(){
            // console.log("QV IS LOADED",self.jsEventsWaited);
            setTimeout("Analytics._pushBV()", 4000);
        });
        
        // our RPC hook
        document.observe('RPC:RESULT', function(obj){
            var rpcRequestArray, rpcResponseArray;
            var requestMethod, requestId;
            if (typeof obj.memo.request != "undefined") {
                rpcRequestArray = (obj.memo.request.parameters.JSONRPC != null) ?
                    obj.memo.request.parameters.JSONRPC.evalJSON() :
                    null;
                if (rpcRequestArray) {
                    rpcResponseArray = obj.memo.responseText.evalJSON();
                    if (rpcResponseArray) {
                        rpcRequestArray.each(function(rpcRequest){
                            requestMethod = rpcRequest.method;
                            requestId = rpcRequest.id;
                            // console.log("Analytics handling RPC request:  ", requestMethod, " with id: ", requestId);
                            // We can do special handlers for requests here or filter out non handled requests... 
                            if (!self.RPC_METHODS_ALLOWED.get(requestMethod)) {
                                // console.log("Analytics skipped ", requestMethod);
                            } else {
                                // Make sure we have the response for this request (id's must match).
                                var myRpcResponse = rpcResponseArray.find(function(rpcResponse){
                                    return rpcResponse.id == requestId
                                });
                                if (myRpcResponse && myRpcResponse.result != null) {
                                    //console.log("Analytics will handle ", myRpcResponse.result.data.Analytics);
                                    var newTags = myRpcResponse.result.data.Analytics;
                                    self.addPendingTags(newTags);
                                }
                            }
                        });
                    }
                }
            }
        });
    

        //Page data already exists hook
        document.observe('PAGEDATA:RESULT', function(obj){
            //console.log("GOT PAGE DATA ",obj);
            var catalog_path = obj.memo;
            var path = eval ('page_data.' + catalog_path);
            if (path.rpcdata){
                if (path.rpcdata.result){
                    if (path.rpcdata.result.Analytics){
                        var newTags = eval ('page_data.' + catalog_path + '.rpcdata.result.Analytics');
                         console.log("page data ",newTags);
                        self.addPendingTags(newTags);
                    }
                }
            }
         
        }); 
        document.observe('RPC:POPUP', function(obj){
          /* 
          $$('[loc]').invoke('observe', 'click', function(e) {
              //var loc = e.element.readAttribute('loc'); 
              console.log("GOT LOC from popup"); // should be relative to js temlates not document body??
          });
          var b = $$('[loc]');
          console.log("got POPUP ",b);
          */
        });
        
         
    },
    _pushBV: function(){
       Analytics.jsEventsWaited.each(function(EVENT){
               if (EVENT.after && EVENT.after == 'bv:loaded'){
                   Analytics._addFrontendEvent(EVENT);
               }
       });
   },
  

    addDynamicListener: function(taggingModule, myEvent, TagBlocks){
        var self = this;
        var id = "default";
        TagBlocks.each(function(tagBlock){
            if (typeof tagBlock.memo != "undefined") {
                id = tagBlock.memo;
            }
            if (!self.subscribers[id]) { self.subscribers[id] = {}; }
            if (!self.subscribers[id][taggingModule]) { self.subscribers[id][taggingModule] = {}; };
            if (!self.subscribers[id][taggingModule][myEvent]) {
                self.subscribers[id][taggingModule][myEvent] = new Array();
            } else {
                 //console.log( "Event is defined ", self.subscribers[id][taggingModule][myEvent] );
            }

            if (!self.seenMemoWithTag[id]) { self.seenMemoWithTag[id] = {}; }
            if (!self.seenMemoWithTag[id][tagBlock.tag]) {
                self.seenMemoWithTag[id][tagBlock.tag] = 1;
                self.subscribers[id][taggingModule][myEvent].push(tagBlock);
                console.log( "pushed Event for: id: ", id, " taggingModule: ", taggingModule, " event: ", myEvent, " -> ", self.subscribers[id][taggingModule][myEvent] );
            }

        });

        // Attach the listener for this event type.
        if (!self.listeners[myEvent]) {
            self.listeners[myEvent] = 1;
            document.observe(myEvent, function(evt){
                // console.log("running window event: ", myEvent, " with memo: ", evt.memo);

                var myId = evt.memo;
                self.enabledModules.each(function(taggingModule){
                     //console.log("for tagging module: ", taggingModule);
                    if (typeof self.subscribers[myId][taggingModule] != "undefined"){
                       if (self.subscribers[myId][taggingModule][myEvent]) {
                          if ( taggingModule.match("CoreMetrics") ) {
                             self.execEventTagBlocks( self.subscribers[myId][taggingModule][myEvent] );
                          }else{ 
                             self.execImageBlocks(  self.subscribers[myId][taggingModule][myEvent] ); 
                          } 
                       }
                    }
                });
            });
        }
    },
    execTags: function (){
        var self = this;
        if (typeof self.pendingTags == "object") {
            Object.keys(self.pendingTags).each(function(taggingModule){
                if (typeof taggingModule != "object" && self.pendingTags[taggingModule] == 'notag') {
                        return;
                }
                Object.keys(self.pendingTags[taggingModule]).each(function(myEvent){
                    // console.log("Analytics: module / event ", taggingModule, myEvent);
			        if (myEvent != 'dom:loaded'){
                        // register this event with our collection of listeners.
                        self.addDynamicListener(taggingModule, myEvent, self.pendingTags[taggingModule][myEvent]);
                    
                    } else {
                         // incoming tagging events under the 'dom:loaded' label can be executed straightaway.
                         if ( taggingModule.match("CoreMetrics") ) {
                            self.execEventTagBlocks( self.pendingTags[taggingModule][myEvent] );
                        }else{
                            self.execImageBlocks( self.pendingTags[taggingModule][myEvent] );
                        }
                    } 
                }); 
            });
        }
    },

    execImageBlocks: function(tagBlocks){
        // these often have a rnd number, gen that here to make sure it isn't used over and over as a global
        var axel = Math.random() + "";
        var num = axel * 1000000000000000000;
        tagBlocks.each(function(tagBlock){
            var tag_url = new Image();
            tagBlock = tagBlock.replace("rndnum",num);
            console.log("exec tag image ",tagBlock);
            tag_url.src = tagBlock;
        });

    },

    execEventTagBlocks: function(tagBlocks){
        tagBlocks.each(function(tagBlock){
            if (!tagBlock.params || !tagBlock.tag) { return; }
                 console.log( "Analytics.execEventTagBlocks about to execute tag: ", tagBlock.tag, " with params: ", tagBlock.params );
            if (typeof window[tagBlock.tag] == "undefined") {
                 console.log( "The Tagging Module function is not found: ", tagBlock.tag );
                return;
            }
            window[tagBlock.tag].apply(this, tagBlock.params);
        });
    },

    _addFrontendEvent: function(EVENT){
        var self = this;

        if ( $(EVENT.domID) == null && EVENT.event != "dom:loaded" ){
            //console.log("CM ELEMENT does not EXIST! ",EVENT.domID);
            // removed by not deleted yet EF 
            //return;
        } 

        if (EVENT.event == "dom:loaded"){
            self.execTagsbyType(EVENT);
        }else{
            if (EVENT.domID || (EVENT.attachAttr && EVENT.attachValue) ){
               self._attachFrontendEvent(EVENT);  
            }
        }
    },

    _attachFrontendEvent: function(EVENT){
        var self = this; 
            // EVENT.attachAttr && EVENT.attachValue are required unless EVENT.domID is specified(for legacy cases with email signups)

            if (EVENT.domID){
                 EVENT.attachAttr = 'id';
                 EVENT.attachValue = EVENT.domID;
            }  
            if (typeof EVENT.attachTag == "undefined"){
                 EVENT.attachTag = '';
            }
            if (EVENT.attachAttr && EVENT.attachValue){
               //console.log ( "got ",EVENT.attachTag,EVENT.attachAttr,EVENT.attachValue,EVENT.event);
               // console.log ( "got ",EVENT.attachTag,EVENT.attachAttr,EVENT.attachValue,EVENT.event);
               // console.log (EVENT);

               var theseListeners = [];
               $$(''+ EVENT.attachTag + '[' + EVENT.attachAttr + '="' + EVENT.attachValue + '"]').each(function (ele){
                    var dups = EVENT.hookIds.indexOf( $(ele).identify() );
                    if ( dups < 0 ){
                        EVENT.hookIds.push( $(ele).identify() ); // if id doesn't exist give it one to use for matching in event handlers  
                        self.fromConfigListeners.push(ele); // keep a full current list for ref
                        theseListeners.push(ele); // but don't dupilicate events
                    }
               });

                 theseListeners.each( function(ele){
                     //console.log("DOM ID IS ",EVENT.domID,EVENT,ele);
                     if (self.uniqueEvents.indexOf(ele) != -1){
                         return;
                     }
                     self.uniqueEvents.push(ele);

                     ele.observe(EVENT.event, function(evt){  
                        // console.log("running event ",evt);
                    
                        // which events match in the current list?  
                        var cevents;
                        self.jsEvents.each(function(CEVENT){
                             CEVENT.hookIds.each(function(hooks){
                                var nodecheck = null;
                                if (hooks == evt.target.parentNode.id){
                                   nodecheck = evt.target.parentNode.id; 
                                }
                                if (hooks == evt.target.id){
                                   nodecheck = evt.target.id;
                                } 
                                // check for all parents as event may have been down from the configured event
                                if (evt.target && typeof evt.target.up == "function") {
                                    var i=1;
                                    while (arr = evt.target.up(i)){
                                        if (hooks == arr.id){
                                            nodecheck = arr.id;
                                            break;
                                        }
                                        i = i+1;
                                    }
                                }
                                if (evt.target.parentNode && typeof evt.target.parentNode.up == "function") {
                                    var i=1;
                                    while (arr = evt.target.parentNode.up(i)){
                                        if (hooks == arr.id){
                                            nodecheck = arr.id;
                                            break;
                                        }
                                        i = i+1;
                                    }
                                }
                                if (nodecheck){
                                    cevents = CEVENT;
                                    // console.log("HOOK MATCHED ",hooks,CEVENT);
                                    // now we know the event and have the data, exec the tag according to type
                                    self.execTagsbyType(CEVENT);
                                }
                             });
                        });
                        //ele.stopObserving();
                     });
               });
            }
     },


    // tags specificly connected to user actions and tags more closely connected to frontend events vs backend data, like prodcat    
     /*
         cmCreatePageElementTag(elementID, elementCategory,attributes) 
         cmCreateManualPageviewTag(pageID, categoryID,DestinationURL,ReferringURL) 
         cmCreateManualLinkClickTag(href,name,pageID) 
         cmCreateManualImpressionTag(pageID, trackSP, trackRE) 
         cmCreateErrorTag(pageID, categoryID) 
     */
    execTagsbyType: function(CEVENT){

         // now config can use any JS var as param value.
        Object.keys(CEVENT).each(function(param){
                if ( param.match("_") ){
                    // console.log("match eval type param");
                    // console.log ( CEVENT[param]  );
                    newParam = param.replace(/_/,'');
                    CEVENT[newParam] = eval( CEVENT[param] );
                }
        });

        if (CEVENT.type == 'conversion_event'){
            if (CEVENT.points < 1){
                CEVENT.points = '"0"';
            }
            this.addPendingTags({"CoreMetrics":{"dom:loaded":[{"params":[CEVENT.eventID, CEVENT.actionType, CEVENT.cat, CEVENT.points,CEVENT.attributes],"tag":"cmCreateConversionEventTag"}]}});
        }
        if (CEVENT.type == 'element'){
            this.addPendingTags({"CoreMetrics":{"dom:loaded":[{"params":[CEVENT.elementID,CEVENT.elementCategory,CEVENT.attributes],"tag":"cmCreatePageElementTag"}]}});
        }
        if (CEVENT.type == 'mpageview'){
            this.addPendingTags({"CoreMetrics":{"dom:loaded":[{"params":[CEVENT.pageID,CEVENT.categoryID,CEVENT.DestinationURL,CEVENT.ReferringURL],"tag":"cmCreateManualPageviewTag"}]}});
        }
        if (CEVENT.type == 'mlinkclick'){
            this.addPendingTags({"CoreMetrics":{"dom:loaded":[{"params":[CEVENT.href,CEVENT.name,CEVENT.pageID],"tag":"cmCreateManualLinkClickTag"}]}});
        }
        if (CEVENT.type == 'mimpression'){
            this.addPendingTags({"CoreMetrics":{"dom:loaded":[{"params":[CEVENT.pageID,CEVENT.trackSP,CEVENT.trackRE],"tag":"cmCreateManualImpressionTag"}]}});
        }
        if (CEVENT.type == 'error'){
            this.addPendingTags({"CoreMetrics":{"dom:loaded":[{"params":[CEVENT.pageID,CEVENT.categoryID],"tag":"cmCreateErrorTag"}]}});
        }
        if (CEVENT.type == 'img'){
            // console.log("IMG EXISTS",CEVENT);
            this.execImageBlocks([CEVENT.src]);
        }

    },
    // find an attribute up from evt.target 
    findAttrUp : function(element,attr) {
   
        if (element && element != "undefined"){ 
            current_element = element;
            if ( current_element.parentNode ){
                if ( current_element.parentNode.hasAttribute(attr) ){
                    if ( current_element.parentNode.readAttribute(attr) ){
                        console.log("Analytics CURRENT node HAS ATTR ");
                        return current_element.parentNode.readAttribute(attr);
                    } 
                }
            }   
            // find element that contains attr
            var nodecheck;
            var i=1;                                   
            while (arr = current_element.up(i)){            
                if ( arr.readAttribute(attr) ){
                    nodecheck = arr;               
                    break;                            
                }                                         
                i = i+1;                               
           }                                          
           i=1;                                       
           while (arr = current_element.parentNode.up(i)){ 
               if ( arr.readAttribute(attr) ){                 
                   nodecheck = arr;               
                   break;                            
               }                                     
               i = i+1;                               
           }                                          
       }
       console.log("Analytics: loc node",nodecheck);
       return nodecheck;
    },

     // find element that contains attr
    findAttrDown : function(element,attr) {
        var nodecheck = [];
        i=0;
        while (arr = element.down(i)){
            if ( arr.readAttribute(attr) ){
                nodecheck.push(arr);
            }
            i = i + 1;
        }
        return nodecheck;
    },

    // Possible special funtions for front end (reserved for future use)
    onDivShow: function() {},
    onFrameUpdate: function() {},
    onJsRedirect: function() {},

    
    crossSellCallback : function() {
         // empty function
    },
    getCrossSellData : function(args) {
        // console.log("cross sell call data called");
        var zone = '';
        if (typeof args.callback === "function") {
            this.crossSellCallback = args.callback;
            console.log("CALL BACK IS ",args.callback);
        }
        
        if ( args.pageContext){
            if (args.pageContext == 'spp'){
                zone = 'ProdPage';
            }
            if (args.pageContext == 'cart'){
                zone ='CartPg1';
            }
        }else{
            return false;
        } 

     // if IO lib is not loaded, consider it disabled, as it likely is in the config. 
     if (typeof cmRecRequest=='function'){
        cmRecRequest(zone,PRODUCT_ID,CATEGORY_ID);
        cmDisplayRecs(); // calls either _ProdPage_zp or 
     }else{
         this.crossSellCallback();
     }

    },
    parseCrossSellData: function(rawCmDataArray) {
        // console.log("============rawCmDataArray=============");
        // console.dir(rawCmDataArray);
        // rawCmData --> parsedData (convert CM data to PG/BX JSON format)
        if (!Object.isArray(rawCmDataArray)) {
            return null;
        }
        var parsedProductData = {products:[]};
        for (var i=0, len=rawCmDataArray.length; i<len; i++) {
            var rawProductDataArray = rawCmDataArray[i];
            if (!Object.isArray(rawProductDataArray)) {
                continue;
            }
            var prod = { skus: [ {} ] };
            var rawProd = rawProductDataArray[4].split("|");
            var rawSku = rawProductDataArray[5].split("|");
            var rawUrl = rawProductDataArray[6].split("---");
            console.log("raw rec Url ", rawUrl);

            //if url is undef, it could be because of an old format product, skip to next rec as a last resort. 
            if (rawUrl == ""){
                continue;
            }

            prod.url = rawUrl[1];
 
            for (var j=0, jlen=rawProd.length; j<jlen; j++) {
                var keyVal = rawProd[j].split("---");
                prod[keyVal[0]] = keyVal[1];
            }

            for (var j=0, jlen=rawSku.length; j<jlen; j++) {
                var keyVal = rawSku[j].split("---");
                prod["skus"][0][keyVal[0]] = keyVal[1];
            }
           
            parsedProductData.products[i] = prod;
        }
        
        return parsedProductData;
    },
 

    _ProdPage_zp: function(a_product_ids, 
                  zone,
                  symbolic,
                  target_id,
                  category,
                  rec_attributes,
                  target_attributes,
                  target_header_txt) {

        if (symbolic !== '_NR_'){
            var parsedData = this.parseCrossSellData(rec_attributes);
            this.crossSellCallback(parsedData);
        }else{
            this.crossSellCallback();// no recs use defaults 
        }

   },

     _CartPg1_zp: function(a_product_ids,
                  zone,
                  symbolic,
                  target_id,
                  category,
                  rec_attributes,
                  target_attributes,
                  target_header_txt) {

        if (symbolic !== '_NR_'){
            var parsedData = this.parseCrossSellData(rec_attributes);
            this.crossSellCallback(parsedData);
            this.crossSellCallback();
        }else{
            this.crossSellCallback();// no recs use defaults
        }

     },
   
   assignLocEvents: function(element,attr) {

       if (typeof element != "object"){
           return;
       } 
       var nodecheck = Analytics.findAttrDown(element,attr);  
       if (typeof nodecheck == "undefined"){
           return;
       }
       nodecheck.each(function (element) { 
           element.observe('click', function(e) {
                  params = {};
                  if (e.target){
                  loc = e.target.readAttribute('loctmpl');
                  if (loc){
                    location_params = loc.split(",");
                    params['TYPE_LOCATION'] = location_params[0];
                    params['PRODUCT_KEY'] = location_params[1];
                  }

                  if (params['TYPE_LOCATION']){
                      el.productView.reportProductView(params);
                  }else{
                     if (typeof Analytics == "object"){
                         loc = Analytics.findAttrUp(e.target,'loctmpl');
                         if (loc){
                             location_params = loc.split(",");
                             params['TYPE_LOCATION'] = location_params[0];
                             params['PRODUCT_KEY'] = location_params[1];
                             params['URL_CLICK'] = 1;
                             el.productView.reportProductView(params);
                         }
                      }
                  }
               }

           });
       });
   }

});

Analytics = new Analytics();