/*  Copyright Mihai Bazon, 2002, 2003  |  http://dynarch.com/mishoo/
 * ---------------------------------------------------------------------------
 *
 * The DHTML Calendar
 *
 * Details and latest version at:
 * http://dynarch.com/mishoo/calendar.epl
 *
 * This script is distributed under the GNU Lesser General Public License.
 * Read the entire license text here: http://www.gnu.org/licenses/lgpl.html
 *
 * This file defines helper functions for setting up the calendar.  They are
 * intended to help non-programmers get a working calendar on their site
 * quickly.  This script should not be seen as part of the calendar.  It just
 * shows you what one can do with the calendar, while in the same time
 * providing a quick and simple method for setting it up.  If you need
 * exhaustive customization of the calendar creation process feel free to
 * modify this code to suit your needs (this is recommended and much better
 * than modifying calendar.js itself).
 */

// $Id: calendar-setup.js,v 1.25 2005/03/07 09:51:33 mishoo Exp $

/**
 *  This function "patches" an input field (or other element) to use a calendar
 *  widget for date selection.
 *
 *  The "params" is a single object that can have the following properties:
 *
 *    prop. name   | description
 *  -------------------------------------------------------------------------------------------------
 *   inputField    | the ID of an input field to store the date
 *   displayArea   | the ID of a DIV or other element to show the date
 *   button        | ID of a button or other element that will trigger the calendar
 *   eventName     | event that will trigger the calendar, without the "on" prefix (default: "click")
 *   ifFormat      | date format that will be stored in the input field
 *   daFormat      | the date format that will be used to display the date in displayArea
 *   singleClick   | (true/false) wether the calendar is in single click mode or not (default: true)
 *   firstDay      | numeric: 0 to 6.  "0" means display Sunday first, "1" means display Monday first, etc.
 *   align         | alignment (default: "Br"); if you don't know what's this see the calendar documentation
 *   range         | array with 2 elements.  Default: [1900, 2999] -- the range of years available
 *   weekNumbers   | (true/false) if it's true (default) the calendar will display week numbers
 *   flat          | null or element ID; if not null the calendar will be a flat calendar having the parent with the given ID
 *   flatCallback  | function that receives a JS Date object and returns an URL to point the browser to (for flat calendar)
 *   disableFunc   | function that receives a JS Date object and should return true if that date has to be disabled in the calendar
 *   onSelect      | function that gets called when a date is selected.  You don't _have_ to supply this (the default is generally okay)
 *   onClose       | function that gets called when the calendar is closed.  [default]
 *   onUpdate      | function that gets called after the date is updated in the input field.  Receives a reference to the calendar.
 *   date          | the date that the calendar will be initially displayed to
 *   showsTime     | default: false; if true the calendar will include a time selector
 *   timeFormat    | the time format; can be "12" or "24", default is "12"
 *   electric      | if true (default) then given fields/date areas are updated for each move; otherwise they're updated only on close
 *   step          | configures the step of the years in drop-down boxes; default: 2
 *   position      | configures the calendar absolute position; default: null
 *   cache         | if "true" (but default: "false") it will reuse the same calendar object, where possible
 *   showOthers    | if "true" (but default: "false") it will show days from other months too
 *
 *  None of them is required, they all have default values.  However, if you
 *  pass none of "inputField", "displayArea" or "button" you'll get a warning
 *  saying "nothing to setup".
 */
 
 	
 
Calendar.setup = function (params) {
	function param_default(pname, def) { if (typeof params[pname] == "undefined") { params[pname] = def; } };

	param_default("inputField",     null);
	param_default("displayArea",    null);
	param_default("button",         null);
	param_default("eventName",      "click");
	param_default("ifFormat",       "%Y/%m/%d");
	param_default("daFormat",       "%Y/%m/%d");
	param_default("singleClick",    true);
	param_default("disableFunc",    null);
	param_default("dateStatusFunc", params["disableFunc"]);	// takes precedence if both are defined
	param_default("dateText",       null);
	param_default("firstDay",       null);
	param_default("align",          "Br");
	param_default("range",          [1900, 2999]);
	param_default("weekNumbers",    true);
	param_default("flat",           null);
	param_default("flatCallback",   null);
	param_default("onSelect",       null);
	param_default("onClose",        null);
	param_default("onUpdate",       null);
	param_default("date",           null);
	param_default("showsTime",      false);
	param_default("timeFormat",     "24");
	param_default("electric",       true);
	param_default("step",           2);
	param_default("position",       null);
	param_default("cache",          false);
	param_default("showOthers",     false);
	param_default("multiple",       null);
	param_default("calstyle",       "calendar");


	var tmp = ["inputField", "displayArea", "button"];
	for (var i in tmp) {
		if (typeof params[tmp[i]] == "string") {
			params[tmp[i]] = document.getElementById(params[tmp[i]]);
		}
	}
	if (!(params.flat || params.multiple || params.inputField || params.displayArea || params.button)) {
		alert("Calendar.setup:\n  Nothing to setup (no fields found).  Please check your code");
		return false;
	}

	function onSelect(cal) {
		var p = cal.params;		
		var update = (cal.dateClicked || p.electric);
		if (update && p.inputField) {
			p.inputField.value = cal.date.print(p.ifFormat);
			if (typeof p.inputField.onchange == "function")
				p.inputField.onchange();
		}
		if (update && p.displayArea)
			p.displayArea.innerHTML = cal.date.print(p.daFormat);
		if (update && typeof p.onUpdate == "function")
			p.onUpdate(cal);
		if (update && p.flat) {
			if (typeof p.flatCallback == "function")
				p.flatCallback(cal);
		}
		if (update && p.singleClick && cal.dateClicked)
			cal.callCloseHandler();
	};

	if (params.flat != null) {
		if (typeof params.flat == "string")
			params.flat = document.getElementById(params.flat);
		if (!params.flat) {
			alert("Calendar.setup:\n  Flat specified but can't find parent.");
			return false;
		}

		var cal = new Calendar(params.firstDay, params.date, params.onSelect || onSelect, params.calstyle);
		cal.showsOtherMonths = params.showOthers;
		cal.showsTime = params.showsTime;
		cal.time24 = (params.timeFormat == "24");
		cal.params = params;
		cal.weekNumbers = params.weekNumbers;
		cal.setRange(params.range[0], params.range[1]);
		cal.setDateStatusHandler(params.dateStatusFunc);
		cal.getDateText = params.dateText;
		if (params.ifFormat) {
			cal.setDateFormat(params.ifFormat);
		}
		if (params.inputField && typeof params.inputField.value == "string") {
			cal.parseDate(params.inputField.value);
		}
		cal.create(params.flat);
		cal.show();
		return false;
	}

	var triggerEl = params.button || params.displayArea || params.inputField;
	triggerEl["on" + params.eventName] = function() {
		var dateEl = params.inputField || params.displayArea;
		var dateFmt = params.inputField ? params.ifFormat : params.daFormat;
		var mustCreate = false;
		var cal = window.calendar;
		if (dateEl)
			params.date = Date.parseDate(dateEl.value || dateEl.innerHTML, dateFmt);
		if (!(cal && params.cache)) {
			window.calendar = cal = new Calendar(params.firstDay,
							     params.date,
							     params.onSelect || onSelect,
							     params.onClose || function(cal) { cal.hide(); }, params.calstyle);
			cal.showsTime = params.showsTime;
			cal.time24 = (params.timeFormat == "24");
			cal.weekNumbers = params.weekNumbers;
			mustCreate = true;
		} else {
			if (params.date)
				cal.setDate(params.date);
			cal.hide();
		}
		if (params.multiple) {
			cal.multiple = {};
			for (var i = params.multiple.length; --i >= 0;) {
				var d = params.multiple[i];
				var ds = d.print("%Y%m%d");
				cal.multiple[ds] = d;
			}
		}
		cal.showsOtherMonths = params.showOthers;
		cal.yearStep = params.step;
		cal.setRange(params.range[0], params.range[1]);
		cal.params = params;
		cal.setDateStatusHandler(params.dateStatusFunc);
		cal.getDateText = params.dateText;
		cal.setDateFormat(dateFmt);
		if (mustCreate)
			cal.create();
		cal.refresh();
		if (!params.position)
			cal.showAtElement(params.button || params.displayArea || params.inputField, params.align);
		else
			cal.showAt(params.position[0], params.position[1]);
		return false;
	};

	return cal;
};


Calendar.fillSelect = function (type)
{
	//window.document.getElementById("output").appendChild(document.createTextNode("fillSelect "+type +" "));
	
	var cal = new Calendar();
	cal.setRange(2009,2010);
	var d = window.document.getElementById(type+'Date').value;
	//window.document.getElementById("output").appendChild(document.createTextNode("date: "+d + " "));

	var dateParts = d.split(".");
	rd = new Date(dateParts[2],dateParts[1]-1,dateParts[0]-1,0,0,0);

	var year=dateParts[2];
	var month=dateParts[1]-1;
	var mday=dateParts[0]-1;

	cal.date=rd;


	var selectMonthYear = window.document.getElementById(type+'SelectMonthYear');
	
	if ( selectMonthYear.hasChildNodes() )
	{
	    while ( selectMonthYear.childNodes.length >= 1 )
	    {
	        selectMonthYear.removeChild( selectMonthYear.firstChild );
	    }
	}


	var range = cal.getRange().split(" ");

	var idx = 0 ;
	var sel = "";
	
	var numMonths = 0;
	
	
	for (var j=0;j<range.length;j++)	
	for(var i=0;i<Calendar._MN.length;i++)
	{		
		currentYear = range[j];

		newOption = document.createElement('option');
		newText=document.createTextNode(Calendar._MN[i]+" "+currentYear);
		newOption.appendChild(newText);
		newOption.setAttribute("value",currentYear+" "+(i+1));
		
		/*
		if (currentYear==(new Date()).getFullYear() && i < (new Date()).getMonth())		
			newOption.style.visibility = "hidden";
		*/		
		
		if ((i)==month)
		{
			if(currentYear==year)
			{
				//idx = j*12 + i;
				idx = numMonths;
				sel = newOption;
			}
		}	
		if (!(currentYear==(new Date()).getFullYear() && i < (new Date()).getMonth()))
		{
			selectMonthYear.appendChild(newOption);
			numMonths = numMonths+1;
		}
	}
		
		selectMonthYear.selectedIndex = idx;
		if (sel != "" )
			sel.setAttribute("selected","selected");
		
	//window.document.getElementById("output").appendChild(document.createTextNode("selectmonthyear idx "+idx + " "));
	
	
	var numDays = cal.getDaysInMonth(year,month,mday);
	
	
	var selectDay = window.document.getElementById(type+'SelectDay');
	if ( selectDay.hasChildNodes() )
	{
	    while ( selectDay.childNodes.length >= 1 )
	    {
	        selectDay.removeChild( selectDay.firstChild );
	    }
	}

	idx=0;
	for(var i=0;i<numDays;i++)
	{

		var currentDay = i+1;
		if (currentDay < 10)
		{
			currentDay = "0"+String(currentDay);
		}
		
		newOption = document.createElement('option');
		newText=document.createTextNode(currentDay);
		newOption.appendChild(newText);
		newOption.setAttribute("value",currentDay);
		if ((i)==mday)
		{
			idx = i;	
			sel=newOption;		
		}

		selectDay.appendChild(newOption);

		
	}
	selectDay.selectedIndex = idx;   	   	
	sel.setAttribute("selected","selected");	
	//window.document.getElementById("output").appendChild(document.createTextNode(selectDay.selectedIndex + " "));                         
	
};


Calendar.updateDate = function(type)
{
	//window.document.getElementById("output").appendChild(document.createTextNode("updateDate "+type +" "));
	
	var dID = type+'SelectDay';
	var myID = type+'SelectMonthYear';
	var elemID = type+'Date';

	var d = window.document.getElementById(dID).value;
	var my = window.document.getElementById(myID).value.split(" ");
	
	
	var newMonth = my[1];
	var newDay = d;
	var newYear = my[0];
	
	var cal = new Calendar();
	var numDays = cal.getDaysInMonth(newYear,newMonth-1,1);	
	
	if (numDays < newDay)
		newDay=1;

	
	window.document.getElementById(elemID).value = newDay+"."+newMonth+"."+newYear;
	Calendar.fillSelect(type);	

	
};


Calendar.catcalcFromDropDown = function()
{	
	//alert("catcalcFromDropDown");
	
	var oldDepDateParts = window.document.getElementById('depDate').value.split(".");
	var oldDepDate = new Date(oldDepDateParts[2],oldDepDateParts[1]-1,oldDepDateParts[0],0,0,0);
	//alert("oldDepDate "+oldDepDate)
	
	var d = window.document.getElementById('depSelectDay').value;
	var my = window.document.getElementById('depSelectMonthYear').value.split(" ");
	var newMonthDep = my[1];
	var newDayDep = d;
	var newYearDep = my[0];
	var newDepDate = new Date(newYearDep,newMonthDep-1,newDayDep,0,0,0);
	//alert("newDepDate "+newDepDate)
	
	var difference = oldDepDate.getTime() - newDepDate.getTime();




	var retDateParts = window.document.getElementById('retDate').value.split(".");
	var oldRetDate = new Date(retDateParts[2],retDateParts[1]-1,retDateParts[0],0,0,0);
	var newRetDate = new Date(oldRetDate.getTime()-difference);
	
			
	var cal = new Calendar();
	cal.setRange(2009,2010);
	var range = cal.getRange().split(" ");
	if (newRetDate.getFullYear()>range[1])
	{
		newRetDate = new Date(range[1],11,31);		
	}

	window.document.getElementById('depDate').value = newDepDate.print("%d.%m.%Y");
	window.document.getElementById('retDate').value = newRetDate.print("%d.%m.%Y");
	
	Calendar.fillSelect("dep");	
	Calendar.fillSelect("ret");

};

Calendar.catcalcFromCalendar = function(cal)
{	
	//alert("catcalcFromCalendar");
	
	var dID = 'depSelectDay';
	var myID = 'depSelectMonthYear';
	var elemID = 'depDate';

	var d = window.document.getElementById(dID).value;
	var my = window.document.getElementById(myID).value.split(" ");
	
	var oldMonthDep = my[1];
	var oldDayDep = d;
	var oldYearDep = my[0];
	
	var oldDepDate = new Date(oldYearDep,oldMonthDep-1,oldDayDep,0,0,0);
			
	var newDepDate = cal.date;
			
	var difference = oldDepDate.getTime() - newDepDate.getTime();	
	
	var retDateParts = window.document.getElementById('retDate').value.split(".");
	var oldRetDate = new Date(retDateParts[2],retDateParts[1]-1,retDateParts[0],0,0,0);
		
	var newRetDate = new Date(oldRetDate.getTime()-difference);
	
	
	var cal = new Calendar();
	cal.setRange(2009,2010);
	var range = cal.getRange().split(" ");
	if (newRetDate.getFullYear()>range[1])
	{
		newRetDate = new Date(range[1],11,31);		
	}	
		
	window.document.getElementById('retDate').value = newRetDate.print("%d.%m.%Y");
	
	Calendar.fillSelect("dep");	
	Calendar.fillSelect("ret");
};

Calendar.catcalc = function(cal)
{
	//window.document.getElementById("output").appendChild(document.createTextNode("catcalc "));
	alert("catcalc");
	
	
	
	
	var d = window.document.getElementById('depDate').value;
	var dateParts = d.split(".");	
	var oldDepDate = new Date(dateParts[2],dateParts[1]-1,dateParts[0]-1,0,0,0);
	alert("oldDepDate "+oldDepDate);
	var newDepDate = cal.date;
	alert("newDepDate "+newDepDate);
	
	d = window.document.getElementById('retDate').value;
	dateParts = d.split(".");	
	var oldRetDate = new Date(dateParts[2],dateParts[1]-1,dateParts[0]-1,0,0,0);
	alert("oldRetDate "+oldRetDate);
	var difference = (oldDepDate.getTime() - newDepDate.getTime())/24/60/60/1000;
	alert("difference: "+difference);
	var newRetDate = Calendar.calcForward(oldRetDate,difference);
	alert("newRetDate "+newRetDate);

	window.document.getElementById('retDate').value=newRetDate.print("%d.%m.%Y");
	
	
	var date = cal.date;
	var time = date.getTime();
	var field = document.getElementById("retDate");
	
	/*
		var d = window.document.getElementById('depDate').value;
		var dateParts = d.split(".");
		var ddOld = new Date(dateParts[2],dateParts[1]-1,dateParts[0]-1,0,0,0);
*/
	
	field.value = date.print("%d.%m.%Y");	
	Calendar.fillSelect("dep");
	
	/*
	var numDays = ddOld.getTime() - cal.getTime();
	var newRetDate = calcForward()
	window.document.getElementById('retDate').value = ;
	*/
	
	
	Calendar.fillSelect("ret");
};

Calendar.fillSelects = function()
{      
	//window.document.getElementById("output").appendChild(document.createTextNode("fillSelects "));
	Calendar.fillSelect("dep");
	Calendar.fillSelect("ret");
	
}

Calendar.mainSetup = function()
{
	//window.document.getElementById("output").appendChild(document.createTextNode("mainSetup "));
	
	var position = "";

/*	
	if (navigator.userAgent.toLowerCase().indexOf("gecko") > -1)
		position = "[35,295]";	
	else
		position = "[10,10]";
	*/
	
	
	Calendar.setup(
	{
	  inputField    : "depDate",
	  ifFormat    	: "%d.%m.%Y",
	  range					: [2009,2010],
	  firstDay			: 1,
	  weekNumbers		: 0,
	  showsTime			: false,
	  showOthers		: false,
	  onUpdate    	: Calendar.catcalcFromCalendar,
	  calstyle			: "calendar",
	  button      	: "depDateCalButton",
	  position : [35,303]
	});


	Calendar.setup(
	{
		inputField   : "retDate",
		ifFormat     : "%d.%m.%Y",
		range		 : [2009,2010],
		firstDay	 : 1,
		weekNumbers	 : 0,
		showsTime	 : false,
		showOthers	 : false,
		calstyle	 : "calendar",
		onUpdate     : Calendar.fillSelects,
		button       : "retDateCalButton",
	position : [235,303]
	});

	//Calendar.buildSelects();
	Calendar.fillSelects();	
}

Calendar.addDatesToForm = function(pos)
{
	
	//window.document.getElementById("output").appendChild(document.createTextNode("addDatesToForm "));
	var cellDep = document.getElementById('depDate');
	var cellRet = document.getElementById('retDate');
	
	document.getElementById(pos).appendChild(cellDep);
	document.getElementById(pos).appendChild(cellRet);
}

Calendar.calcForward = function(originalDate, numDays)
{        
	
	//window.document.getElementById("output").appendChild(document.createTextNode("calcForward "));
	var oTime = originalDate.getTime();
	var duration = numDays*24*60*60*1000;
	var dTime = oTime + duration;
	
	var destDate = new Date();
	destDate.setTime(dTime);
	
	return destDate;
}

Calendar.setInitialValues = function()
{	
	//window.document.getElementById("output").appendChild(document.createTextNode("setInitialValues "));
	
	var start;
	var duration;
	

	
	if (document.getElementById('homeFormPauschalTab').checked)
	{
		
		start = 14;
		duration = 14;
	}
	else if (document.getElementById('homeFormDPTab').checked)  
	{
		
		start = 28;
		duration = 7;
	}
	else if (document.getElementById('homeFormHotelTab').checked)
	{
		start = 28;
		duration = 2;
	}
	else if (document.getElementById('homeFormFlightTab').checked)
	{
		start = 28;
		duration = 7;
	}
	else if (document.getElementById('homeFormCarTab').checked)
	{
		start = 26;
		duration = 7;
	}
	else
	{
		start = 1;
		duration = 7;
	}
   
   
   
  var departureDate = Calendar.calcForward(new Date(),start);
  var returnDate = Calendar.calcForward(departureDate,duration);
  
  
	var formattedDepartureDate = departureDate.getDate() + "." + (departureDate.getMonth()+1) + "." + departureDate.getFullYear();
	var formattedReturnDate = returnDate.getDate() + "." + (returnDate.getMonth()+1) + "." + returnDate.getFullYear();
	
	
	document.getElementById('depDate').value = formattedDepartureDate;	
	document.getElementById('retDate').value = formattedReturnDate;			
	
	
			  
}