function SimpleMVCController()
{
};

var cachedViews = new Array();
var ViewsEnum = {START_VIEW: "startView", 
				FLIGHTS_FORM: "FlightsForm", 
				CONNECTING_FLIGHTS_FORM: "ConnectingFlightsForm",
				CONNECTING_FLIGHTS_RESULT: "ConnectingFlightsResult",
				FLIGHTS_NO_RESULT: "FlightsNoResults",
				FLIGHTS_ONE_RESULT: "FlightsOneResult",
				FLIGHTS_MULTIPLE_RESULTS: "FlightsMultipleResults"};

				
var data = {};
var currentMonth;
var wt_controller = new SimpleMVCController();
data.searchByFlight = true;
data.flightType = "arrival";

var wtCities;
var todaysDate;
var latestDate;

//The id of the div where everything will be repainted
wt_controller.resultsContainer = "whichTerminalMainContainer";

/**
 * Attaches an autocompleter component with a field showing matching cities after
 * 3 characters are entered.
 */
wt_controller.fillCities = function(cityList, el)
{
	wtCities = cityList;
	
	var tokens = wtCities;
    
	
	var completer1 = new Autocompleter.Local(el, tokens, {
		'minLength': 3,
		'delay': 0,
		'filterTokens': function() {
			var regex = new RegExp('.*' + this.queryValue.escapeRegExp() + '.*', 'i');
			return this.tokens.filter(function(token){
				return (regex.test(token));
			});
		},
		'injectChoice': function(choice) {
			var el = new Element('li').setHTML(this.markQueryValue(choice));
			el.inputValue = choice;
			this.addChoiceEvents(el).injectInside(this.choices);
		}
	});
	
};

wt_controller.GotCities = function(cities)
{
	alert(cities);
};

/**
 * Retrieves a list of cities to be  used by autocompleter components
 */
wt_controller.loadAutocompleterCities = function(citiesField)
{
	if(!wtCities)
	{
		AjaxTerminalFinderHelper.getCities(wtAirportCode,{
										  callback: function(cityList) {
										  	
										    wt_controller.fillCities(cityList, citiesField);
										  }
										  });
	}
	else
	{
		wt_controller.fillCities(wtCities, citiesField);
	}
};



/**
 * Injects the result html into the resultsContainer div
 */
wt_controller.showResults = function(result)
{
		document.getElementById(wt_controller.resultsContainer).innerHTML = result;	
		wt_controller.attachTips();
};

/**
 * Go back to the  page
 */
wt_controller.showStartPage = function(result)
{
	document.getElementById(wt_controller.resultsContainer).innerHTML = result;
	if(!cachedViews[ViewsEnum.START_VIEW])
	{
		cachedViews[ViewsEnum.START_VIEW] = result;
	}
};

/**
 * Hides the hideDiv component and displays the displayDiv component
 * This is for use in the form where the user can either choose to 
 * enter a flight number or a destination.
 */
wt_controller.swapDivs = function(displayDiv, hideDiv)
{
	document.getElementById(displayDiv).style.display = "";
	document.getElementById(hideDiv).style.display = "none";
};

/**
 * Searches for arrival flights based on the date and either 
 * the flight number or the airport arriving from.
 */
wt_controller.searchFlights = function()
{
	wt_controller.displayLoadingImage(true);
	if(wt_controller.validateFlightForm())
	{
		data.errors = [];
		var flightDate = new Date();
		var dateStr = document.forms["wt_flightForm"].elements["hiddenDateField"].value;
		var splitDateStr = dateStr.split("/");
		
		var monthYearStr = splitDateStr[1].split(",");
		
		flightDate.setDate(splitDateStr[0]);
		flightDate.setMonth(monthYearStr[0]-1);
		flightDate.setFullYear(monthYearStr[1]);
		
		var flightCode = "";
		var flightDest = "";
		
		if(data.searchByFlight)
		{
			flightCode = document.forms["wt_flightForm"].elements["wt_flightNumber"].value;
			data.flightCode = flightCode;
		}
		else
		{
			flightDest = document.forms["wt_flightForm"].elements["wt_flyingLocation"].value;
			data.flightDest = flightDest;
		}
		if(data.flightType == "arrival")
		{
			AjaxTerminalFinderHelper.searchFlights(wtAirportCode, "A", flightDate, flightCode, flightDest, wt_controller.showFlightSearchResult);
		}
		if(data.flightType == "departure")
		{
			AjaxTerminalFinderHelper.searchFlights(wtAirportCode, "D", flightDate, flightCode, flightDest, wt_controller.showFlightSearchResult);
		}
		if(data.flightType == "connectingInbound")
		{
			AjaxTerminalFinderHelper.searchFlights(wtAirportCode, "A", flightDate, flightCode, flightDest, wt_controller.showFlightSearchResult);
		}
		if(data.flightType == "connectingOutbound")
		{
			AjaxTerminalFinderHelper.searchFlights(wtAirportCode, "D", flightDate, flightCode, flightDest, wt_controller.showFlightSearchResult);
		}
		
	}
	else
	{
		if(data.flightType == "connectingInbound" || data.flightType == "connectingOutbound")
		{
			wt_controller.getView(ViewsEnum.CONNECTING_FLIGHTS_FORM,wt_controller.showFlightsForm);
		}
		else
		{
			wt_controller.getView(ViewsEnum.FLIGHTS_FORM,wt_controller.showFlightsForm);	
		}
		
		wt_controller.displayLoadingImage(false);

	}
	
};

wt_controller.showFlightNoResults = function(result)
{
	wt_controller.processAndDisplay(result, ViewsEnum.FLIGHTS_NO_RESULT);
};

/**
 * Validates that the given date is between today and six months.
 */
wt_controller.validateFlightForm = function()
{
	var errors = new Array();
	var dateStr = document.forms["wt_flightForm"].elements["hiddenDateField"].value;
	
	var splitStr = dateStr.split("/");
	var day = splitStr[0];
	var monthYearStr = splitStr[1].split(",");
	var month = monthYearStr[0];
	var year = monthYearStr[1];
	
	
	if(!wt_controller.checkBeforeToday(year, month, day))
	{
		errors.push("Date is in the past");
	}
	var date = new Date();
	date.setFullYear(year);
	date.setMonth((month*1)-1);
	date.setDate(day);
	
	// entry date must be less than maximum date (13 months ahead)
	if( date.print("%Y%m") > wt_controller.getMaxMonthDate().print("%Y%m") ) {
		errors.push("Flight information held up to "+wt_controller.getMaxMonthDate().print("%m/%Y")+". Please select a date within the range.");
	}
	
	//need to also see if the destination is chosen, is it valid.
	if(!data.searchByFlight)
	{
		var arrivalFrom = document.forms["wt_flightForm"].elements["wt_flyingLocation"].value;
		if(arrivalFrom.length >0)
		{
			var found = false;
			
			for(var i=0;i<wtCities.length;i++)
			{
				var city = wtCities[i];
				if(city.toUpperCase().indexOf(arrivalFrom.toUpperCase())>-1)
				{
					found = true;
					break;
				}
				
			}
			
			if(!found)
			{
			   if(data.flightType=="arrival" || data.flightType=="connectingInbound")
			   {
				errors.push("Departure airport not found.  Please double check.");
			   }
			   if(data.flightType=="departure" || data.flightType=="connectingOutbound")
			   {
				errors.push("Destination not found.  Please double check.");
			   }

				//errors.push("Search airport not found. Please double check.");
			}
		}
		else
		{
			errors.push("Please specify an airport.");
		}
	}
	else
	{
		
		var flightCode = document.forms["wt_flightForm"].elements["wt_flightNumber"].value;
		if(flightCode == document.forms["wt_flightForm"].elements["wt_flightNumber"].title)
		{
			errors.push("Please enter a flight number.");
		}	
	}
	
	if(errors.length>0)
	{
		data.errors = errors;
		return false;
	}
	else
		return true;
	
};

/**
 * Display the first arriving/departure flights form and set up associated components
 * like the calendar and the autocompleter.  This also caches the javascript
 * template for the arriving/departure flights form for future use.
 */
wt_controller.showFlightsForm = function(template)
{
			
		var result2 = template.process(data);
		document.getElementById(wt_controller.resultsContainer).innerHTML = result2;
		wt_controller.displayLoadingImage(false);
		Calendar.setup({
			    date           :    todaysDate,
			    inputField     :    "flightDateHiddenField",     // id of the input field
			    ifFormat       :    "%e/%m,%Y",     // format of the input field (even if hidden, this format will be honored)
			    button         :    "flightCalendar",  // trigger button (well, IMG in our case)
			    align          :    "Tr",           // alignment (defaults to "Bl")
			    singleClick    :    true,
			    dateStatusFunc :    wt_controller.dateStatusHandler
			    
			});
		if(!(data.flightType == "connectingOutbound"))
		{
			//set date to today's date.
			wt_controller.setDateNow("wt_flightForm", new Date());	
		}
		else
		{
			//set date to selected inbound flight
			var selectedDate = data.selectedInboundFlight.scheduledStart;
			wt_controller.setDateNow("wt_flightForm", selectedDate);
		}
			
		new TextBoxHint("wt_flightNumber", "e.g. BA1234" );
		new TextBoxHint("wt_flyingLocation", "Enter city or airport" );
        
		wt_controller.loadAutocompleterCities(document.forms["wt_flightForm"].elements["wt_flyingLocation"]);
		
		if(data.flightType == "connectingInbound" || data.flightType == "connectingOutbound")
		{
			if(!cachedViews[ViewsEnum.CONNECTING_FLIGHTS_FORM])
			{
				cachedViews[ViewsEnum.CONNECTING_FLIGHTS_FORM] = template;
			}	
		}
		else
		{
			if(!cachedViews[ViewsEnum.FLIGHTS_FORM])
			{
				cachedViews[ViewsEnum.FLIGHTS_FORM] = template;
			}	
		}
		
			
		wt_controller.attachTips();
};

wt_controller.updateFlightDateHiddenField = function(formName)
{
	var day = document.forms[formName].elements["termDay"].value;
	var monthYear = document.forms[formName].elements["termMonth"].value;
	var dateStr = day+"/"+monthYear;
	
	document.forms[formName].elements["hiddenDateField"].value = dateStr;	
	
};

wt_controller.updateMonthDays = function()
{
	var monthSelect = document.getElementById("termMonth");
	var monthString = monthSelect.options[monthSelect.selectedIndex].value;
	var monthStringSplit = monthString.split(",");
	var month = monthStringSplit[0]*1;
	var yearStr = monthStringSplit[1];
	var year = yearStr*1;
	
	var maxDays = wt_controller.daysInMonth(month, year);
	var daySelect = document.getElementById("termDay");
	var selectedDay = daySelect.selectedIndex;
	//removeAllOptions(daySelect);
	daySelect.length = 0;
	
	for(var i=1; i<=maxDays; i++)
	{
		wt_controller.addOption(daySelect,i,i);
	}
	daySelect.selectedIndex = selectedDay;
	
};


/**
 * Validator for the Calendar component that disables certain dates
 * Here, no dates before and after 6 months ares selectable
 */
wt_controller.dateStatusHandler = function(date, y, m, d)
{
    
	// entry date cannot be before today
	if(wt_controller.checkBeforeToday(y,m+1,d) == false) {
		return true;
	}
    
    
	// entry date must be less than maximum date (13 months ahead)
	//if( date.print("%Y%m") > wt_controller.getMaxMonthDate().print("%Y%m") ) {
	//	return true;
	//}
		
	if(date.getTime() > latestDate.getTime())
	{
		return true;
	}
	
	return false;

};

/**
 *	Checks whether the given date is before today
 *
 */
wt_controller.checkBeforeToday = function(yearStr, monthStr, dayStr)
{
	monthStr = monthStr - 1;

	var theDate = new Date();
	
	
	theDate.__msh_oldSetFullYear( yearStr, monthStr, dayStr);
	
	if ( theDate.print("%Y%m%d") < new Date().print("%Y%m%d") ) {
	  return false;
	} 
	else {
	  return true;
	}

};

/**
 * Sets the appropriate form date elements to today's date. 
 */
wt_controller.setDateNow = function(formName, date)
{

		//var now = new Date();
	    
	
		document.forms[formName].elements['hiddenDateField'].value = date.print("%e/%m,%Y");
		
		document.forms[formName].elements['termMonth'].value = date.print("%m,%Y");
	    //document.forms['carparkquote'].elements['dd'].selectedIndex=now.getDate() - 2;
		
		document.forms[formName].elements['termDay'].value = date.getDate();
		
};

/**
 * Calculates the latest date possible that can be chosen using the calendar component
 */
wt_controller.getMaxMonthDate = function()
{
	var maxMonth = data.flightMonths[data.flightMonths.length-1].value;
	
	var maxMonthMySplit = maxMonth.split(",");	
	var monthStr = maxMonthMySplit[0];
	var yearStr = maxMonthMySplit[1];

	var maxMonthDate = new Date();
	maxMonthDate.__msh_oldSetFullYear( yearStr, monthStr-1, 1);
	
	return maxMonthDate;
};

/**
 * Gets a given javascript view template from the server and calls the given callback function.
 * Takes care to cache the view if it has been loaded from the server already.
 *
 */
wt_controller.getView = function(viewName, callBackFunc)
{
	
	//check local cache first
	if(cachedViews[viewName])
	{
		callBackFunc(cachedViews[viewName]);
	}
	else
	{
		//get from server
		AjaxTerminalFinderHelper.getViewTemplate(viewName, callBackFunc);
	}
};

/**
 * Navigate from the start view to the arrival flights form
 *
 */
wt_controller.goToArrivalFlights = function()
{
	data.flightType = "arrival";
	wt_controller.clearMatchingData();
	wt_controller.displayLoadingImage(true);
	wt_controller.getView(ViewsEnum.FLIGHTS_FORM,wt_controller.showFlightsForm);
};

wt_controller.goToDepartureFlights = function()
{
	data.flightType = "departure";
	wt_controller.clearMatchingData();
	wt_controller.displayLoadingImage(true);
	wt_controller.getView(ViewsEnum.FLIGHTS_FORM,wt_controller.showFlightsForm);
};

wt_controller.goToConnectingInboundFlights = function()
{
	data.flightType = "connectingInbound";
	wt_controller.clearMatchingData();
	wt_controller.displayLoadingImage(true);
	wt_controller.getView(ViewsEnum.CONNECTING_FLIGHTS_FORM,wt_controller.showFlightsForm);
	
};

wt_controller.goToConnectingOutboundFlights = function()
{
	data.flightType = "connectingOutbound";
	wt_controller.clearMatchingData();
	wt_controller.displayLoadingImage(true);
	wt_controller.getView(ViewsEnum.CONNECTING_FLIGHTS_FORM,wt_controller.showFlightsForm);
	
};

wt_controller.goToStart = function()
{
	data.errors = [];
	data.searchByFlight = true;
	wt_controller.clearMatchingData();
	wt_controller.getView(ViewsEnum.START_VIEW, wt_controller.showStartPage);
	$("whichTerminalMainContainer").style.display = "";
};

wt_controller.clearMatchingData = function()
{
    data.matchingFlights = null;
    data.matchingFlight = null;
}

/**
 * Adds a given number of months to a date and returns it.
 * 
 */
wt_controller.addMonthsToDate = function(startDate, numMonths){
    var addYears = Math.floor(numMonths/12);
    var addMonths = numMonths - (addYears * 12);
    var newMonth = startDate.getMonth() + addMonths;
    if (startDate.getMonth() + addMonths > 11) {
      ++addYears;
      newMonth = startDate.getMonth() + addMonths - 12;
    }
    var newDate = new Date(startDate.getFullYear()+addYears,newMonth,startDate.getDate(),startDate.getHours(),startDate.getMinutes(),startDate.getSeconds());

    // adjust to correct month
    while (newDate.getMonth() != newMonth) {
      newDate = wt_controller.addDaysToDate(newDate, -1);
    }

    return newDate;
};

/** 
 * Adds a given number of days to a date and returns it
 */
wt_controller.addDaysToDate = function(myDate,days) {
    return new Date(myDate.getTime() + (days*24*60*60*1000));
};

/**
 * Calculates the number of days in a month
 */
wt_controller.daysInMonth = function(iMonth, iYear)
{
	return 32 - new Date(iYear, iMonth-1, 32).getDate();
};

/**
 * Event to notify form date elements that a date has been changed by the calendar
 *
 */
wt_controller.dateChanged = function(formName, dateValue)
{
    var dates = dateValue.split("/");
	// dates[0] = 31
	// dates[1] = 08,07 (August 2007)
	
	document.forms[eval("\""+formName+"\"")].elements["termDay"].selectedIndex = dates[0]-1;
	document.forms[eval("\""+formName+"\"")].elements["termMonth"].value = dates[1];
	wt_controller.updateMonthDays();
    
};

/**
 * component for implementing a hint in a textbox.  The hint disappears when the focus is set to the textbox 
 * and reappears when focus is removed.
 */
function TextBoxHint(inputBox, textHint)
{
	if(!document.getElementById) return false;				// If browser does not understand, get out now!
	if(!document.getElementById(inputBox)) return false;	// If text box is not found get out!
	var inputBoxId = document.getElementById(inputBox);		// Assign the hbw_postcode to postCodeBox
	inputBoxId.value = textHint;
	
	$(inputBox).addEvent("focus", function()							// When the user clicks in the box
	{
		if(inputBoxId.value == textHint)					// If the value is the default value
			inputBoxId.value = '';							// Clear the box
	});
	$(inputBox).addEvent("blur", function()
	{
	if(inputBoxId.value == '')							// If the box is empty
			inputBoxId.value = textHint;					// Fill the box with instruction
	});
	
};

/*
 * Initialize the date and month data to be used by the calendars
 *
 */
wt_controller.init = function()
{		
		
		dwr.engine.setHttpMethod("GET");
        data.regex = /[^a-z]{2,}\s+?([A-Z]{2,})+?|[A-Z]+/;
		data.errors = [];
		todaysDate = new Date();
		
		var daysInMonth = wt_controller.daysInMonth(todaysDate.getMonth()+1,todaysDate.getFullYear());
		var flightDays = new Array(daysInMonth);
		
		var tempDate = new Date();
	
		for(var i=1;i<=daysInMonth;i++)
		{
			tempDate.setDate(i);  
			flightDays[i] = { value: tempDate.print("%e"), display: tempDate.print("%d")};
		}
		
		var flightMonths = new Array(6);
		
		flightMonths[0] = {value: todaysDate.print("%m,%Y"), display: todaysDate.print("%b %Y")};
		
		latestDate = wt_controller.addDaysToDate(todaysDate, 180);
		var numberOfMonths = 0;
		if(latestDate.getMonth()<tempDate.getMonth())
		{
			numberOfMonths = latestDate.getMonth()+12 - tempDate.getMonth();
		}
		else
		{
			numberOfMonths = latestDate.getMonth() - tempDate.getMonth();
		}
		
		for(i=1;i<=numberOfMonths;i++)
		{
			tempDate = wt_controller.addMonthsToDate(todaysDate,i);
			flightMonths[i] = {value: tempDate.print("%m,%Y"), display: tempDate.print("%b %Y")};
		}
		
		data.flightDays = flightDays;
		data.flightMonths = flightMonths;
		
		wt_controller.goToStart();
	
};

/**
 * Displays the page with just one result.
 */
wt_controller.showFlightOneResult = function(result)
{
	wt_controller.processAndDisplay(result, ViewsEnum.FLIGHTS_ONE_RESULT);
};

/** Displays a list of the matching flights for the search criteria.
 * 
 */
wt_controller.showFlightMultipleResults = function(result)
{
	wt_controller.processAndDisplay(result,ViewsEnum.FLIGHTS_MULTIPLE_RESULTS);
};


/**
 * Displays the page with no results and explanation for why no
 * results are displaying.
 * 
 */
wt_controller.showFlightSearchResult = function(results)
{
	
	if(results.length==0)
	{
		//go to no results page
		wt_controller.getView(ViewsEnum.FLIGHTS_NO_RESULT,wt_controller.showFlightNoResults);
	}
	if(results.length == 1)
	{
		//go to single result page
		data.matchingFlight = results.pop();
		data.matchingFlights = [data.matchingFlight];
		wt_controller.getView(ViewsEnum.FLIGHTS_ONE_RESULT,wt_controller.showFlightOneResult);	
			
	}
	if(results.length > 0)
	{
		data.matchingFlights = results;
		wt_controller.getView(ViewsEnum.FLIGHTS_MULTIPLE_RESULTS,wt_controller.showFlightMultipleResults);	
		
	}
};

wt_controller.showFlightDetails = function(flightCode)
{
	wt_controller.displayLoadingImage(true);
	for(f in data.matchingFlights)
	{
		if(data.matchingFlights[f].flightCode == flightCode)
		{
			data.matchingFlight = data.matchingFlights[f];
			break;
		}
	}
	wt_controller.getView(ViewsEnum.FLIGHTS_ONE_RESULT,wt_controller.showFlightOneResult);	
	wt_controller.attachTips();
};

Array.prototype.findProperty = function(property, value)
{
	var result = null;
	var i = 0;
	for(i=0;i<this.length;i++)
	{
		if(this[i][property] && this[i][property] == value)
		{
			result = this[i];
			break;
		}
	}
	
	return result;
}

wt_controller.selectInboundAndContinue = function(flightCode)
{
	wt_controller.displayLoadingImage(true);
//	for(f in data.matchingFlights)
//	{
//		if(data.matchingFlights[f].flightCode == flightCode)
//		{
//			data.selectedInboundFlight = data.matchingFlights[f];
//			break;
//		}
//	}
    data.selectedInboundFlight = data.matchingFlights.findProperty("flightCode", flightCode);
	
	wt_controller.goToConnectingOutboundFlights();
};



wt_controller.handleGetData = function (str) {
	data.flightConnectionsLink = str;
	wt_controller.getConnectingFlightResults();
}

wt_controller.selectOutboundAndContinue = function(flightCode)
{
	wt_controller.displayLoadingImage(true);
	data.selectedOutboundFlight = data.matchingFlights.findProperty("flightCode", flightCode);
	AjaxTerminalFinderHelper.generateFlightConnectionsLink(data.selectedInboundFlight.terminalName, data.selectedInboundFlight.otherAirportCode, data.selectedInboundFlight.otherAirportCountryCode, data.selectedOutboundFlight.terminalName, data.selectedOutboundFlight.otherAirportCode, data.selectedOutboundFlight.otherAirportCountryCode,wt_controller.handleGetData);	
};

wt_controller.getConnectingFlightResults = function()
{
	wt_controller.getView(ViewsEnum.CONNECTING_FLIGHTS_RESULT, wt_controller.showConnectingFlightResult);
};

wt_controller.showConnectingFlightResult = function(result)
{
	wt_controller.processAndDisplay(result, ViewsEnum.CONNECTING_FLIGHTS_RESULT);
};

wt_controller.attachTips = function()
{
	var Tips3 = new Tips($$('.Tips3'), {
			showDelay: 400,
			hideDelay: 400,
			fixed: true
		});
	
};

wt_controller.processAndDisplay = function(result, viewName)
{
	cachedViews[viewName] = result;
	var resultHTML = result.process(data);
	document.getElementById(wt_controller.resultsContainer).innerHTML = resultHTML;
	wt_controller.displayLoadingImage(false);
	wt_controller.attachTips();
	
};

wt_controller.displayLoadingImage = function(show)
{
	if(show)
	{
		document.getElementById("wt_loadingImage").style.display = "";
	}
	else
	{
		document.getElementById("wt_loadingImage").style.display = "none";
	}
};

wt_controller.addOption = function(selectbox,text,value )
{
    var optn = document.createElement("OPTION");
    optn.text = text;
    optn.value = value;
    selectbox.options.add(optn);
}

/**
 * Calls the init method upon load of the browser.
 */
window.addEvent("load", wt_controller.init);