dojo.provide("dojotrader.widget.Context");
dojo.require("dojo.collections.*");
dojo.require("dojo.lang.timing.Timer");

dojotrader.widget.Context = function(userID){
	this._user = userID;
	this._quotesCache = new dojo.collections.Dictionary();
	this._quotesToUpdate = 0;
	this._updateTimer = null;
	
	
	this.startUpdateTimer = function(interval) {
		this._updateTimer = new dojo.lang.timing.Timer(interval);
		this._updateTimer.onTick = dojo.lang.hitch(this,this._updateQuotesCache);
		this._updateTimer.start();
	};
	
	this.stopUpdateTimer = function() {
		this._updateTimer.stop();
		this._updateTimer = null;
	};
	
	this._addQuoteToCache = function(quote) {
		this._quotesCache.add(quote.symbol, quote);
		//this.onQuoteAddComplete(quote);
	};
	
	this.getQuoteFromCache = function(symbol) {
		//alert("getQuoteFromCache");
		value = null;
		if (this._quotesCache.contains(symbol)){
			value = this._quotesCache.entry(symbol).value;
		} else {
			this._getQuoteFromServer(symbol);
		}
		
		return value;
	};
	
	this._getQuoteFromServer = function(symbol) {
		//alert("_getQuoteFromServer");
		dojo.io.bind({
    		method:  "GET",
    		//url: "/proxy/SoapProxy/getQuote?p1=" + symbol.value + "&format=json",
       		url: "/daytraderProxy/doProxy/getQuote?p1=" + symbol,
       		mimetype: "text/json",
    		load: dojo.lang.hitch(this, this._handleQuote),
    		error: dojo.lang.hitch(this, this._handleError),
    		useCache: false,
            preventCache: true
  		});
  	};
  	
  	this._getQuoteFromServerForUpdate = function(symbol) {
		//alert("_getQuoteFromServer");
		dojo.io.bind({
    		method:  "GET",
    		//url: "/proxy/SoapProxy/getQuote?p1=" + symbol.value + "&format=json",
       		url: "/daytraderProxy/doProxy/getQuote?p1=" + symbol,
       		mimetype: "text/json",
    		load: dojo.lang.hitch(this, this._handleQuoteUpdate),
    		error: dojo.lang.hitch(this, this._handleError),
    		useCache: false,
            preventCache: true
  		});
  	};
  	
  	this._handleQuote = function(type, data, evt) {
  		//alert("_handleQuote");
  		this._addQuoteToCache(data.getQuoteReturn);
  		this.onQuoteAddComplete(data.getQuoteReturn);
  		dojo.event.topic.publish("/quotes", {action: "add", quote: data.getQuoteReturn});
  	};
  	
  	this._handleQuoteUpdate = function(type, data, evt) {
  		//alert("_handleQuote");
  		newQuote = data.getQuoteReturn;
  		
  		// check for quote equality - only update if they are different
  		oldQuote = this._quotesCache.entry(newQuote.symbol).value;
  		if (oldQuote.price != newQuote.price || oldQuote.change != newQuote.change) {
  			this._addQuoteToCache(newQuote);
  			dojo.event.topic.publish("/quotes", {action: "update", quote: newQuote});
  		}
  		
  		this._quotesToUpdate++;
 			
 		if (this._quotesCache.count == this._quotesToUpdate) {
 			//alert("Refresh Complete: " + this._quotesCache.count + " - " + this._quotesToUpdate);
 			this.onQuotesUpdateComplete();
 		}
  	};
  	
  	this._updateQuotesCache = function() {
  		this._quotesToUpdate = 0;
			
		keys = this._quotesCache.getKeyList();
		for (idx = 0; idx < keys.length; idx++) {
			this._getQuoteFromServerForUpdate(keys[idx]);
		}
  	};
  	
  	this.onQuotesUpdateComplete = function() {};
  	
  	this.onQuoteAddComplete = function() {}
};