/**
 * jCalendar 0.5
 *
 * 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.
 */
if (!Array.prototype.indexOf) {
    Array.prototype.indexOf = function (elt /*, from*/ ) {
        var len = this.length;

        var from = Number(arguments[1]) || 0;
        from = (from < 0) ? Math.ceil(from) : Math.floor(from);
        if (from < 0) from += len;

        for (; from < len; from++) {
            if (from in this && this[from] === elt) return from;
        }
        return -1;
    };
}

var scriptSource = (function (scripts) {
    var scripts = document.getElementsByTagName('script'),
        script = scripts[scripts.length - 1];

    if (script.getAttribute.length !== undefined) {
        return script.src
    }

    return script.getAttribute('src', -1)
}());

jQuery.jcalendar = function () {
    var months = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'];
    var days = ['S', 'M', 'T', 'W', 'T', 'F', 'S'];
    var navLinks = {
        p: 'Prev',
        n: 'Next',
        t: 'Today'
    };
    var _firstDayOfWeek;
    var _firstDate;
    var _lastDate;
    var _selectedDate;

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

            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">&lsaquo; ' + navLinks.p + '</a>').click(function () {
                    jQuery.jcalendar.changeMonth(lastMonth, this, day, month, year);
                    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 + ' &rsaquo;</a>').click(function () {
                    jQuery.jcalendar.changeMonth(nextMonth, this, day, month, year);
                    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 daysToHL = "hello";
            jQuery.ajax({
                url: scriptSource.replace('jcalendar.js', '') + "getdates.php",
                data: "year=" + d.getFullYear() + "&month=" + (d.getMonth() + 1),
                dataType: 'json',
                async: false,
                success: function (data) {
                    daysToHL = data;
                }
            });
            // update the header
            var monthNames = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];


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


            var titleCell = jQuery("<th colspan='7'>" + monthNames[d.getMonth()] + " - " + d.getFullYear() + "</th>");
            var titleRow = jQuery("<tr></tr>");
            titleRow.append(titleCell);
            headRow.prepend(titleRow);

            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 day' : 'weekday day')
                    };

                    if (daysToHL.indexOf("" + (curDay + 1)) > -1) {
                        atts['class'] += ' highlighted';
                    }

                    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 + '">&nbsp;' + (curDay + 1) + '&nbsp;</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';
                    }
                    
                    var isMouseover = false;
                    var isAnimating = false;
                    function slideDisclosure(thisEl, isUp){
                    	var disEl = thisEl.parent().find('.disclosure');
                    	if(disEl.length){
	                    	isAnimating = true;
	                    	if(isUp){
	                    		disEl.slideUp('fast', function(){
	                    			isAnimating = false;
	                    			// mouse is out, let see if its over again
	                    			if(isMouseover==thisEl.text()){
	                    				// should be down now
	                    				slideDisclosure(thisEl, false);
	                    			}
	                    		});
	                    	}
	                    	else {
		                    	thisEl.parent().find('.disclosure').slideDown('fast', function(){
									isAnimating = false;
									// mouse is over lets see if its out now
									if(isMouseover!=thisEl.text()){
										slideDisclosure(thisEl, true);
									}
	                    		});
	                    	}
	                    }
                    }
                    
                    var thisCell = jQuery("<div />").addClass('inner').append(dayStr)
                    	.hover(function(){
                    		oldMouseover = isMouseover;
                    		isMouseover = jQuery(this).text();
                    		if(!isAnimating || oldMouseover!=jQuery(this).text()){
                    			// not animating
                    			// lets slide it
                    			slideDisclosure(jQuery(this),false);
	                        }
                        },
                        function(){
                    		isMouseover = false;
                    		if(!isAnimating){
                    			// not animating
                    			// lets slide it
                    			slideDisclosure(jQuery(this),true);
	                        }
                        });
                        
                    if(daysToHL.indexOf("" + (curDay + 1)) > -1){
                    	//alert(scriptSource.replace('jcalendar.js', '')+'getmeetingsfordate.php?year='+d.getFullYear()+'&month='+(d.getMonth()+1)+'&day='+(curDay+1));
                    	thisCell.append(jQuery('<div />').addClass('disclosure').load(scriptSource.replace('jcalendar.js', '')+'getmeetingsfordate.php?year='+d.getFullYear()+'&month='+(d.getMonth()+1)+'&day='+(curDay+1)));
                    }
                    
                    thisRow.append(jQuery('<td></td>').attr(atts).append(thisCell));
                    curDay++;
                }

                tBody.append(thisRow);
            } while (curDay < lastDay);

            jQuery('div.jcalendar').html('<table cellspacing="0" cellpadding="0" id="eventCalendar"></table><div class="jcalendar-links"></div>');
            jQuery('div.jcalendar table').append(headRow, tBody);
            jQuery('div.jcalendar > div.jcalendar-links').append(prevLink, todayLink, nextLink);
        };

    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 = aDays;
            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(jQuery(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(jQuery(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;
        }
    };
}();

jQuery.fn.jcalendar = function (a) {
    this.each(function () {
        var day = jQuery(this).find('select.jcalendar-select-day');
        var month = jQuery(this).find('select.jcalendar-select-month');
        var year = jQuery(this).find('select.jcalendar-select-year');
        jQuery('div.jcalendar-selects').after('<div class="jcalendar"></div>');
        jQuery.jcalendar.setDateWindow(this, a, year);
        jQuery.jcalendar.show(this, day, month, year);

        day.change(function () {
            // only if a valid day is selected
            if (this.value > 0) {
                d = new Date(year.val(), month.val() - 1, this.value);
                jQuery.jcalendar.changeMonth(d, a, day, month, year);
            }
        });

        month.change(function () {
            // only if a valid month is selected
            if (this.value > 0) {
                d = new Date(year.val(), this.value - 1, 1);
                jQuery.jcalendar.changeMonth(d, a, day, month, year);
            }
        });

        year.change(function () {
            // only if a valid year is selected
            if (this.value > 0) {
                d = new Date(this.value, month.val() - 1, 1);
                jQuery.jcalendar.changeMonth(d, a, day, month, year);
            }
        });

    });
    return this;
};