/*  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 1.26 2006/02/11 12:32:59 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".
 */

var globalFrom,globalTo;
var differenceDays;

function setupDependentCalendar(fldFrom,fldTo,diff){
	globalFrom = fldFrom;
	globalTo = fldTo;
	
	Calendar.setup({
		inputField 			: globalFrom,
		ifFormat 			: "%d-%m-%Y",
		onUpdate			: fixcalc,
		button 				: globalFrom+"_button"
	});
	
	Calendar.setup({
		inputField     		: globalTo,
		ifFormat       		: "%d-%m-%Y",
		onUpdate			: fixcalc,
		button         		: globalTo+"_button"
	});
	
	if(!diff){differenceDays = 365;}else{differenceDays=diff;}
	
}

function setupSingleCalendar(item){
	Calendar.setup({
		inputField 			: item,
		ifFormat 			: "%d-%m-%Y",
		onUpdate			: singleSplitDate,
		button 				: item+"_button"
	});
}

function fixcalc(cal){
	var date = cal.date;
	var time = date.getTime();
	var diff = 60 * 60 * 24 * differenceDays * 1000; // 180 days
	var temp = new Array();
	var cal1 = document.getElementById(globalFrom);
	var cal2 = document.getElementById(globalTo);

	// If date "from" has been set, but not date "to"
	if(cal1){
		if(cal1.value!='' && cal2.value==''){
			time += diff;
			var date2 = new Date(time);
			cal2.value = date2.print("%d-%m-%Y");
		}
	}
	// If date "to" has been set, but not date "from"
	if(cal2){
		if(cal1.value=='' && cal2.value!=''){
			time -= diff;
			var date1 = new Date(time);
			cal1.value = date1.print("%d-%m-%Y");
		}
	}
	
	splitDates();
	setTimeout("validDates();", 500);
}

function splitDates(){

	var cal1 = document.getElementById(globalFrom);
	var cal2 = document.getElementById(globalTo);
	
	var cal1_day = document.getElementById(globalFrom+'_day');
	var cal1_month = document.getElementById(globalFrom+'_month');
	var cal1_year = document.getElementById(globalFrom+'_year');
	
	var cal2_day = document.getElementById(globalTo+'_day');
	var cal2_month = document.getElementById(globalTo+'_month');
	var cal2_year = document.getElementById(globalTo+'_year');
	
	// Split date "from"
	if(cal1){
		if(cal1.value!=''){
			temp = cal1.value.split("-"); 
			cal1_day.value = temp[0];
			cal1_month.value = temp[1];
			cal1_year.value = temp[2];
		}
	}
	// Split date "to"
	if(cal2){
		if(cal2.value!=''){
			temp = cal2.value.split("-");
			cal2_day.value = temp[0];
			cal2_month.value = temp[1];
			cal2_year.value = temp[2];
		}
	}

}

function singleSplitDate(cal){
	var calId = cal.params.inputField.id;
	var cal1 = document.getElementById(calId);
	var cal1_day = document.getElementById(calId+'_day');
	var cal1_month = document.getElementById(calId+'_month');
	var cal1_year = document.getElementById(calId+'_year');
	
	var date = cal.date;
	var time = date.getTime();
	var date1 = new Date(time);
	cal1.value = date1.print("%d-%m-%Y");
	
	// Split date
	if(cal1){
		if(cal1.value!=''){
			var temp = cal1.value.split("-");
			cal1_day.value = temp[0];
			cal1_month.value = temp[1];
			cal1_year.value = temp[2];
		}
	}

}

function validDates(){
	var temp = new Array();
	var error = document.getElementById('dates_error');
	var cal1_day = document.getElementById(globalFrom+'_day');
	var cal1_month = document.getElementById(globalFrom+'_month');
	var cal1_year = document.getElementById(globalFrom+'_year');
	var cal2_day = document.getElementById(globalTo+'_day');
	var cal2_month = document.getElementById(globalTo+'_month');
	var cal2_year = document.getElementById(globalTo+'_year');
	
	// Date format is correct, if date "from" is larger than date "to"
	if(cal1_day.value!='' && cal1_month.value!='' && cal1_year.value!='' && cal2_day.value!='' && cal2_month.value!='' && cal2_year.value!=''){
		var cal1_diff = cal1_year.value + cal1_month.value + cal1_day.value;
		var cal2_diff = cal2_year.value + cal2_month.value + cal2_day.value;
		if(cal1_diff!=''){cal1_diff=parseInt(cal1_diff);}
		if(cal2_diff!=''){cal2_diff=parseInt(cal2_diff);}

		if(cal1_diff<cal2_diff){
			if(error){error.style.display = 'none';}
			if(Boolean(typeof customDatesCheck != 'undefined') && typeof(customDatesCheck)=='function')
			{
			    customDatesCheck(globalFrom,globalTo);
			}
			else
			{
			    datesCheck(globalFrom,false);
			    datesCheck(globalTo,true);
			}
		}else{
			if(error){error.style.display = 'block';}
		}
	}
}

function resetPeriodsFields(){
	var error = document.getElementById('dates_error');
	var cal1 = document.getElementById(globalFrom);
	var cal2 = document.getElementById(globalTo);
	var cal1_day = document.getElementById(globalFrom+'_day');
	var cal1_month = document.getElementById(globalFrom+'_month');
	var cal1_year = document.getElementById(globalFrom+'_year');
	var cal2_day = document.getElementById(globalTo+'_day');
	var cal2_month = document.getElementById(globalTo+'_month');
	var cal2_year = document.getElementById(globalTo+'_year');

	//ALPHACODE
	var today_day = (new Date).getDate();
	if(today_day < 10)
	    today_day = "0" + today_day.toString();
	var today_month = (new Date).getMonth() + 1;
	if(today_month < 10)
	    today_month = "0" + today_month.toString();
	var today_year = (new Date).getFullYear();
	
	if(cal1){cal1.value=today_day + '-' + today_month + '-' + today_year.toString()}
	if(cal1_day){cal1_day.value=today_day;}
	if(cal1_month){cal1_month.value=today_month;}
	if(cal1_year){cal1_year.value=today_year.toString();}
	
	today_year += 10;
	
	if(cal2){cal2.value=today_day + '-' + today_month + '-' + today_year.toString()}
	if(cal2_day){cal2_day.value=today_day;}
	if(cal2_month){cal2_month.value=today_month;}
	if(cal2_year){cal2_year.value=today_year.toString();}
	
	if(error){error.style.display = 'none';}
}

function resetPeriods()
{  
    resetPeriodsFields();
    if(Boolean(typeof customResetPeriods != 'undefined') && typeof(customResetPeriods)=='function')
    {
        customResetPeriods();
    }
    else
    {
        datesCheck('fromdate', false);
	    datesCheck('todate', true);
	}
}


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("dateTooltipFunc", null);
	param_default("dateText",        null);
	param_default("firstDay",        1);
	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",        false);
	param_default("step",            2);
	param_default("position",        null);
	param_default("cache",           false);
	param_default("showOthers",      false);
	param_default("multiple",        null);

	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);
		cal.setDateToolTipHandler(params.dateTooltipFunc);
		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(); });
			cal.setDateToolTipHandler(params.dateTooltipFunc);
			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;
};