/**
 * jCalendar 0.7.2
 *
 * Some code based on jQuery Date Picker (http://kelvinluck.com/assets/jquery/datePicker/)
 *
 * Copyright (c) 2007 Theodore Serbinski (http://tedserbinski.com)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * Version 0.6 or above
 * Copyright (C) 2008 Augusto TMW (http://augustotmw.com.br)
 *
 *
 * $("container").jcalendar({< jcalendar options >},{dayClick: function(){}, monthClick: function(){}, end: function(){}})
 *
 * dayClick: function callback when you click in a day
 * monthClick: function callback when you click in a month navigation
 * end: function callback to be called at the end of the calendar's creation
 *
 *
 *
 */
jQuery.jcalendar = function() {
	var months = ['Janeiro', 'Fevereiro', 'Março', 'Abril', 'Maio', 'Junho', 'Julho', 'Agosto', 'Setembro', 'Outubro', 'Novembro', 'Dezembro'];
	var days = ['D', 'S', 'T', 'Q', 'Q', 'S', 'S'];
	var diasSemana = ['Domingo', 'Segunda-feira', 'Terça-feira', 'Quarta-feira', 'Quinta-feira', 'Sexta-feira', 'Sábado'];
	var navLinks = {p:'«', n:'»', t:'Hoje'};
	var _firstDayOfWeek;
	var _firstDate;
	var _lastDate;
	var _selectedDate;
	var _callback = {
			dayClick: function(){ },
			monthClick: function(){ },
			end: function(){ }
	};


	var _drawCalendar = function(dateIn, a, day, month, year) {
	  var today = new Date();
	  var d;
	  window._objDatas = new Array();

		if (dateIn == undefined) {
			// start from this month.
			d = new Date(today.getFullYear(), today.getMonth(), 1);
			year.val(today.getFullYear());
			month.val(today.getMonth()+1);
			day.val(today.getDate());
		}
		else {
			// start from the passed in date
			d = dateIn;
		  d.setDate(1);
		}

		// check that date is within allowed limits
		if ((d.getMonth() < _firstDate.getMonth() && d.getFullYear() == _firstDate.getFullYear()) || d.getFullYear() < _firstDate.getFullYear()) {
			d = new Date(_firstDate.getFullYear(), _firstDate.getMonth(), 1);
		}
		else if ((d.getMonth() > _lastDate.getMonth() && d.getFullYear() == _lastDate.getFullYear()) || d.getFullYear() > _lastDate.getFullYear()) {
			d = new Date(_lastDate.getFullYear(), _lastDate.getMonth(), 1);
		}

		var firstMonth = true;
		var firstDate = _firstDate.getDate();

		// create prev and next links
		if (!(d.getMonth() == _firstDate.getMonth() && d.getFullYear() == _firstDate.getFullYear())) {
			// not in first display month so show a previous link
			firstMonth = false;
			var lastMonth = d.getMonth() == 0 ? new Date(d.getFullYear()-1, 11, 1) : new Date(d.getFullYear(), d.getMonth()-1, 1);
			var prevLink = jQuery('<a href="" class="link-prev">'+ navLinks.p +'</a>').click(function() {
				jQuery.jcalendar.changeMonth(lastMonth, this, day, month, year);
				var mObj = {month: d.getMonth() < 1 ? 12 : d.getMonth(), year: d.getMonth() < 1 ? d.getFullYear()-1 : d.getFullYear()};
				_callback.monthClick(mObj);
				return false;
			});
		}

		var finalMonth = true;
		var lastDate = _lastDate.getDate();

		if (!(d.getMonth() == _lastDate.getMonth() && d.getFullYear() == _lastDate.getFullYear())) {
			// in the last month - no next link
			finalMonth = false;
			var nextMonth = new Date(d.getFullYear(), d.getMonth()+1, 1);
			var nextLink = jQuery('<a href="" class="link-next">'+ navLinks.n +'</a>').click(function() {
				jQuery.jcalendar.changeMonth(nextMonth, this, day, month, year);
				var mObj = {month: d.getMonth()+2 > 12 ? 1 : d.getMonth()+2, year: d.getMonth()+2 > 12 ? d.getFullYear()+1 : d.getFullYear()};
				_callback.monthClick(mObj);
				return false;
			});
		}

		var todayLink = jQuery('<a href="" class="link-today">'+ navLinks.t +'</a>').click(function() {
			day.val(today.getDate());
			jQuery.jcalendar.changeMonth(today, this, day, month, year);
			return false;
		});

    // update the year and month select boxes
  	year.val(d.getFullYear());
  	month.val(d.getMonth()+1);

		var headRow = jQuery("<tr></tr>");
		for (var i=_firstDayOfWeek; i<_firstDayOfWeek+7; i++) {
			var weekday = i%7;
			var wordday = days[weekday];
			headRow.append('<th scope="col" abbr="'+ wordday +'" title="'+ wordday +'" class="'+ (weekday == 0 || weekday == 6 ? 'weekend' : 'weekday') +'">'+ wordday +'</th>');
		}
		headRow = jQuery("<thead></thead>").append(headRow);

		var tBody = jQuery("<tbody></tbody>");
		var lastDay = (new Date(d.getFullYear(), d.getMonth()+1, 0)).getDate();
		var curDay = _firstDayOfWeek - d.getDay();
		if (curDay > 0) curDay -= 7;

		var todayDate = today.getDate();
		var thisMonth = d.getMonth() == today.getMonth() && d.getFullYear() == today.getFullYear();

    // render calendar
		do {
 		  var thisRow = jQuery("<tr></tr>");
  		for (var i=0; i<7; i++) {
  			var weekday = (_firstDayOfWeek + i) % 7;
  			var atts = {'class':(weekday == 0 || weekday == 6 ? 'weekend ' : 'weekday ')};

  			if (curDay < 0 || curDay >= lastDay) {
  				dayStr = ' ';
  			}
  			else if (firstMonth && curDay < firstDate-1) {
  				dayStr = curDay+1;
  				atts['class'] += 'inactive';
  			}
  			else if (finalMonth && curDay > lastDate-1) {
  				dayStr = curDay+1;
  				atts['class'] += 'inactive';
  			}
  			else {
  				d.setDate(curDay+1);

 				// attach a click handler to every day to select it if clicked
  				// we use the rel attribute to keep track of the day that is being clicked
  				//dayStr = jQuery('<a href="" rel="'+ d +'">'+ (curDay+1) +'</a>').click(function(e) {				
				//var idData = months[d.getMonth()]+ d.getFullYear()+'_'+(curDay+1);
				_objDatas[curDay] = {day: (curDay+1),month: (d.getMonth()+1),year: d.getFullYear()};
				var dataCompleta = diasSemana[d.getDay()]+', dia '+ (curDay+1)+' de '+months[d.getMonth()]+' de '+ d.getFullYear();
				
				dayStr = jQuery('<a href="" name="dia'+(curDay+1)+'" rel="'+ dataCompleta +'">'+ (curDay+1) +'</a>').click(function(e) {
            if (_selectedDate) {
               _selectedDate.removeClass('selected');
            }
      			_selectedDate = jQuery(this);
      			_selectedDate.addClass('selected');
		        day.val(new Date(_selectedDate.attr('rel')).getDate());
					return false;
  				});

  				// highlight the current selected day
  				if (day.val() == d.getDate()) {
  				  _selectedDate = dayStr;
  				  _selectedDate.addClass('selected');
  				}
  			}

  			if (thisMonth && curDay+1 == todayDate) {
  				atts['class'] += 'today';
  			}
  			thisRow.append(jQuery("<td></td>").attr(atts).append(dayStr));
  			curDay++;
      }

			tBody.append(thisRow);
		} while (curDay < lastDay);
		
		var mes = '<div class="mes">'+ months[d.getMonth()]+' '+d.getFullYear() +'</div>';

		jQuery('div.jcalendar').html('<div class="jcalendar-links"></div><table cellspacing="1"></table><div class="diaAtual"></div>');
		jQuery('div.jcalendar table').append(headRow, tBody);
		jQuery('div.jcalendar > div.jcalendar-links').append(prevLink, mes, nextLink);
		jQuery('div.jcalendar > div.diaAtual').append('Hoje '+diasSemana[today.getDay()]+', dia '+ todayDate +' de '+months[d.getMonth()]+' de '+ d.getFullYear());

		$('div.jcalendar table a').click(function(){
			$('div.jcalendar > div.diaAtual').html('<div class="diaAtual">'+ $(this).attr('rel') +'</div>');
			_callback.dayClick(_objDatas[parseInt(this.name.replace(/dia/gi,""))-1], this);
			return false;
		});

		$('div.jcalendar jcalendar-links a').click(function(){
			$('div.jcalendar > div.diaAtual').html('<div class="diaAtual">'+ $('div.jcalendar table a.selected').attr('rel') +'</div>');																 
		});
	_callback.end();
	};

	return {
		show: function(a, day, month, year) {
 			_firstDate = a._startDate;
			_lastDate = a._endDate;
			_firstDayOfWeek = a._firstDayOfWeek;

			// pass in the selected form date if one was set
			var selected;
			if (year.val() > 0 && month.val() > 0 && day.val() > 0) {
			  selected = new Date(year.val(), month.val()-1, day.val());

			}
			else {
			  selected = null;
			}
			_drawCalendar(selected, a, day, month, year);
		},
		changeMonth: function(d, e, day, month, year) {
			_drawCalendar(d, e, day, month, year);
		},
		/**
		* Function: setLanguageStrings
		*
		* Allows you to localise the calendar by passing in relevant text for the english strings in the plugin.
		*
		* Arguments:
		* days		-	Array, e.g. ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday']
		* months	-	Array, e.g. ['January', 'Febuary', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'];
		* navLinks	-	Object, e.g. {p:'Prev', n:'Next', c:'Close', b:'Choose date'}
		**/
		setLanguageStrings: function(aDays, aMonths, aNavLinks) {
			days = ['Domingo', 'Segunda-feira', 'Terça-feira', 'Quarta-feira', 'Quinta-feira', 'Sexta-feira', 'Sábado'];
			months = aMonths;
			navLinks = aNavLinks;
		},
		/**
		* Function: setDateWindow
		*
		* Used internally to set the start and end dates for a given date select
		*
		* Arguments:
		* i			-	The id of the INPUT element this date window is for
		* w			-	The date window - an object containing startDate and endDate properties
		*				e.g. {startDate:'24-11-1981', endDate:'25-12-2012}
		**/
		setDateWindow: function(i, w, year) {
			if (w == undefined) w = {};
			if (w.startDate == undefined) {
				// set the minimum browseable date equal to January of the min year in the select box
				// don't get the first option because that is an empty year

				// note we can't do this: year.find('option:eq(1)').val()
				// it doesn't work in 1.0 since find() is destructive
				// so we copy the object to a new var
				i._startDate = new Date($(year).find('option:eq(1)').val(), 0, 1);
			}
			else {
  			dateParts = w.startDate.split('-');
  			i._startDate = new Date(dateParts[2], Number(dateParts[1])-1, Number(dateParts[0]));
			}
			if (w.endDate == undefined) {
			  // set the maximum browseable date equal to December of the max year in the select box

			  // note we can't do this: year.find('option:last').val()
				// it doesn't work in 1.0 since find() is destructive
				// so we copy the object to a new var
				i._endDate = new Date($(year).find('option:last').val(), 11, 1);
			}
			else {
  			dateParts = w.endDate.split('-');
  			i._endDate = new Date(dateParts[2], Number(dateParts[1])-1, Number(dateParts[0]));
			}
			i._firstDayOfWeek = w.firstDayOfWeek == undefined ? 0 : w.firstDayOfWeek;
		},
		setCallback: function(a){
			_callback = $.extend(_callback, a);
		}
	};
}();

jQuery.fn.jcalendar = function(a, b) {
	this.each(function() {
    		var day = $(this).find('select.jcalendar-select-day');
    		var month = $(this).find('span.jcalendar-select-month');
    		var year = $(this).find('select.jcalendar-select-year');
    		$('div.jcalendar-selects').after('<div class="jcalendar"></div>');
		b = b == null || b == "undefined" ? {} : b;
		jQuery.jcalendar.setCallback(b);
		jQuery.jcalendar.setDateWindow(this, a, year);
		jQuery.jcalendar.show(this, day, month, year);
	});
	return this;
};