// jQuery Month Calendar Plugin 1.0 Copyright 2009 Jarrett Vance http://jvance.com/pages/jQueryMonthCalPlugin.xhtml
(function ($) {
  $.fn.calendar = function (options) {
    var opts = $.extend({}, $.fn.calendar.defaults, options);
    return this.each(function () {
      var $this = $(this);
      $this.find('td')
        .hover(function () { $(this).addClass('hover') }, function () { $(this).removeClass('hover') })
        .click(function () { return changeDay($this, $(this), new Date($(this).find('a').attr('alt')), opts); });
      $this.find('a[rel=prev], a[rel=next]').click(function () {
        changeMonth($this, opts, ($(this).attr('rel') == 'next'));
        return false;
      });
      refreshCal($this, opts);
    });
  }

  function changeMonth($cal, opts, next) {
    if (next && opts.month == 11) {
      opts.year = opts.year + 1;
      opts.month = 0;
    } else if (!next && opts.month == 0) {
      opts.year = opts.year - 1;
      opts.month = 11;
    } else {
      opts.month = next ? opts.month + 1 : opts.month - 1;
    }
    refreshCal($cal, opts);
  }

  function changeDay($cal, $cell, date, opts) {
    opts.current = date;
    opts.year = date.getFullYear();
    opts.month = date.getMonth();
    refreshCal($cal, opts);
    //allow outside cancel
    return opts.dateChanged(date);
  };

  function refreshCal($cal, opts) {
    var monthNames = ['Enero', 'Febrero', 'Marzo', 'Abril', 'Mayo', 'Junio', 'Julio', 'Agosto', 'Septiembre', 'Octubre', 'Noviembre', 'Diciembre'];
    $cal.find('.month').text(monthNames[opts.month] + ' ' + opts.year);
    $cal.find('td').removeClass('out').removeClass('today').removeClass('current').removeClass('event');
    var days = getDaysInMonthForDate(opts.year, opts.month, opts.current, opts.events);
    var tds = $cal.find('td');
    for (j = 0; j < 42; j++) {
      $(tds[j]).find('a').text(days[j].date.getDate())
        .attr('alt', days[j].date.toDateString())
        .attr('title', formatDate(days[j].date.toDateString()))
        .attr('href', getUrl(days[j].date, opts));
      if (days[j].out) $(tds[j]).addClass('out');
      if (days[j].current) $(tds[j]).addClass('current');
      if (days[j].today) $(tds[j]).addClass('today');
      if (days[j].event) $(tds[j]).addClass('event');
    }
  }

  function getUrl(date, opts) {
    var url = opts.templateUrl;
    url = url.replace(opts.templateYear, date.getFullYear());
    url = url.replace(opts.templateMonth, ((date.getMonth() + 1) < 10 ? "0" : "") + (date.getMonth() + 1));
    url = url.replace(opts.templateDay, (date.getDate() < 10 ? "0" : "") + date.getDate());
    return url;
  }


  function getDaysInMonthForDate(year, month, current, events) {
    var today = new Date();
    var first = new Date(year, month, 1);
    first.setDate(first.getDate() - first.getDay());

    var days = new Array(42);
    for (j = 0; j < 42; j++) {
      var d = new Date(first);
      d.setDate(first.getDate() + j);
      days[j] = {
        date: d,
        out: !(d.getFullYear() == year && d.getMonth() == month),
        today: d.getFullYear() == today.getFullYear() && d.getMonth() == today.getMonth() && d.getDate() == today.getDate(),
        current: d.getFullYear() == current.getFullYear() && d.getMonth() == current.getMonth() && d.getDate() == current.getDate(),
        event: checkEvent(d, events)
      }
    }
    return days;
  };

  function checkEvent(d, events) {
    hasEvent = false;
    for (i = 0; i < events.length; i++) {
      eventYear     = formatTsToDate(events[i]).split("-")[0];
      eventMonth    = formatTsToDate(events[i]).split("-")[1];
      eventDate     = formatTsToDate(events[i]).split("-")[2];
      dateFullDate  = d.getFullYear().toString() + (d.getMonth()+1).toString() + d.getDate().toString();
      eventFullDate = eventYear + eventMonth + eventDate;

      if(dateFullDate == eventFullDate) {
        hasEvent = true;
        break;
      }
    }

    return hasEvent;
  }

  function formatDate(date) {
    date = new Date(date);
    var month = date.getMonth() + 1;
    var day = date.getDate();
    var year = date.getFullYear();
    return day + "/" + month + "/" + year;
  }
  
  function formatTsToDate(timestamp) {
    date = timestamp.toString().split(" ")[0];
    var year  = date.split("-")[0];
    var month = date.split("-")[1];
    var day   = date.split("-")[2];
    
    formatMonth = month.split("0");
    
    if(formatMonth.length > 1) {
      if(formatMonth[1] == "") {
      	month = formatMonth[0] + "0";
      } else {
        month = formatMonth[1];
      }
    } else {
      month = formatMonth;
    }
    
    formatDay = day.split("0");
    
    if(formatDay.length > 1) {
      if(formatDay[1] == "") {
      	day = formatDay[0] + "0";
      } else {
        day = formatDay[1];
      }
    } else {
      day = formatDay;
    }
    
    return year + "-" + month + "-" + day;
  }

  $.fn.calendar.defaults = {
    current: new Date(),
    year: new Date().getFullYear(),
    month: new Date().getMonth(),
    templateYear: 'year',
    templateMonth: 'month',
    templateDay: 'day',
    templateUrl: '/year/month/day',
    dateChanged: function (date) { return true; }
  };
})(jQuery);