/**
 * checks if Date d1 is <= Date d2
 * by checking day of the month/year
 * only, (hours/min/sec/mil are ignored)
 *
 * ex
 * var d1 = new Date(); d1.setFullYear(2004);
 * var d2 = new Date(); d1.setFullYear(2005);
 * date(LTEQ(d1, d2)); // true
 * date(LTEQ(d2, d1)); // false
 */
jive.model.dateLTEQ = function(d1, d2){
	return (d1.getFullYear() < d2.getFullYear() || d1.getFullYear() == d2.getFullYear() && (
	        d1.getMonth() < d2.getMonth()  || d1.getMonth() == d2.getMonth() && (
	        d1.getDate() <= d2.getDate())));
}
jive.model.dateLT = function(d1, d2){
	return (d1.getFullYear() < d2.getFullYear() || d1.getFullYear() == d2.getFullYear() && (
	        d1.getMonth() < d2.getMonth()  || d1.getMonth() == d2.getMonth() && (
	        d1.getDate() < d2.getDate())));
}


jive.model.dateGT = function(d1, d2){
	return jive.model.dateLT(d2, d1);
}
jive.model.dateGTEQ = function(d1, d2){
	return jive.model.dateLTEQ(d2, d1);
}
/*
 * compares if two dates have equal month and year
 */
jive.model.monthYearEQ = function(d1, d2){
	return d1.getMonth() == d2.getMonth() &&
	        d1.getFullYear() == d2.getFullYear();
}
jive.model.dateEQ = function(d1, d2){
	return (d1.getDate() == d2.getDate() &&
	        d1.getMonth() == d2.getMonth() &&
	        d1.getFullYear() == d2.getFullYear());
}
/*
 * compares if two dates are equal (including time HH:MM only)
 */
jive.model.datetimeEQ = function(d1, d2){
	return (d1.getFullYear() == d2.getFullYear() &&
	        d1.getMonth() == d2.getMonth() &&
	        d1.getDate() == d2.getDate() &&
		d1.getHours() == d2.getHours() &&
		d1.getMinutes() == d2.getMinutes());
}
/*
 * compares if two dates are less than or equal (including time HH:MM only)
 */
jive.model.datetimeLTEQ = function(d1, d2){
	return (d1.getFullYear() < d2.getFullYear() || (d1.getFullYear() == d2.getFullYear() &&
	        (d1.getMonth() < d2.getMonth() || d1.getMonth() == d2.getMonth() &&
	        (d1.getDate() < d2.getDate() || d1.getDate() == d2.getDate() &&
		(d1.getHours() < d2.getHours() || d1.getHours() == d2.getHours() &&
		d1.getMinutes() <= d2.getMinutes())))));
}
/**
 * this subtracts one month from a date
 *
 * THIS FIXES A SAFARI BUG (OR 'FEATURE' :)
 *
 * this also fixes subtracting a month if the date >= 29
 * ie, if it's march 29th - 1 month = feb 29th = march 1st :(
 * instead, it'll subtract a month, and if the month is still the same
 * it'll subtract 1 day until it's different
 */
jive.model.dateMinusMonth = function(d){
	var m = d.getMonth();
	if(d.getMonth() == 0){
		d.setFullYear(d.getFullYear() - 1);
		d.setMonth(11);
	}else{
		d.setMonth(d.getMonth()-1);
	}
	while(d.getMonth() == m){
		d.setDate(d.getDate() - 1);
	}
}
/**
 * this subtracts one week from a date
 *
 * THIS FIXES A SAFARI BUG (OR 'FEATURE' :)
 */
jive.model.dateMinusWeek = function(d){
	d.setDate(d.getDate()-7);
}
/**
 * this subtracts one day from a date
 *
 * THIS FIXES A SAFARI BUG (OR 'FEATURE' :)
 */
jive.model.dateMinusDay = function(d){
	if(d.getDate() == 0 && d.getDate() == 1){
		d.setFullYear(d.getFullYear() - 1);
		d.setMonth(11);
		d.setDate(31);
	}else{
		d.setDate(d.getDate()-1);
	}
}


/**
 * helps format common date strings
 */
jive.model.DateHelper = function(control){

	var settings = control.getSettingsManager();
	var lm = control.getLanguageManager();
	var that = this;

//	var shortDayNames = new Array("Sun","Mon","Tue","Wed","Thu","Fri","Sat");
//	var dayNames = new Array("Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday");
//	var longMonth = new Array("January","February","March","April","May","June","July","August","September","October","November","December");
//	var shortMonth = new Array("Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec");


	/**
	 * returns the human readable difference
	 * between 2 datetimes
	 * ie, 2 days, or about an hour
	 *
	 * it should be able to complete the sentance:
	 * the event starts _________
	 * "in 4 minutes"
	 * "15 minutes ago"
	 */
	this.readableDifference = function(d1, d2){
		var secs = d1.getTime() - d2.getTime();
		secs = secs / 1000;

		var ago = false;
		if(secs <= 0){
			ago = true;
			secs = -1 * secs;
		}

		var ret = "";

		if(secs < 10){
			return "just now";
		}else if(secs < 20){
			ret = "a few seconds";
		}else if(secs < 60){
			ret = "less than a minute";
		}else if(secs < 90){
			ret = "about a minute";
		}else{
			var mins = Math.ceil(secs / 60.0);
			if(mins <=50){
				var s = (mins == 1) ? "" : "s";
				ret = mins + " minute" + s;
			}else{
				var hours = Math.ceil(mins / 60.0);
				if(hours < 20){
					var s = (hours == 1) ? "" : "s";
					ret = hours + " hour" + s;
				}else{
					var days = Math.round(hours / 24.0);
					if(days < 7){
						var s = (days == 1) ? "" : "s";
						ret = days + " day" + s;
					}else{
						var weeks = Math.ceil(days / 7.0);
						var s = (weeks == 1) ? "" : "s";
						ret = weeks + " week" + s;
					}
				}
			}
		}

		if(ago){
			return ret + " ago";
		}else{
			return "in " + ret;
		}
	}


	/**
	 * returns the human readable difference
	 * between 2 datetimes
	 * ie, 2 days (in days/weeks, not hours/minutes)
	 *
	 * it should be able to complete the sentance:
	 * the event starts _________
	 * "in 4 days"
	 * "15 weeks ago"
	 */
	this.readableDateDifference = function(d11, d22){

		var d1 = new Date();
		d1.setTime(d11.getTime());
		d1.setHours(0);
		d1.setMinutes(0);
		d1.setSeconds(0);
		d1.setMilliseconds(0);

		var d2 = new Date();
		d2.setTime(d22.getTime());
		d2.setHours(0);
		d2.setMinutes(0);
		d2.setSeconds(0);
		d2.setMilliseconds(0);


		var secs = d1.getTime() - d2.getTime();
		secs = secs / 1000;

		var ago = false;
		if(jive.model.dateLT(d1, d2)){
			ago = true;
		}
		secs = Math.abs(secs);

		var ret = "";

			var mins = Math.ceil(secs / 60.0);
			var hours = Math.ceil(mins / 60.0);
			var days = Math.floor(hours / 24.0);
			if(days == 0){
				ret = "today";
			}else if(days == 1 && ago){
				ret = "yesterday";
			}else if(days == 1 && !ago){
				ret = "tomorrow";
			}else if(days < 7){
				var s = (days == 1) ? "" : "s";
				ret = days + " day" + s;
				if(ago){
					ret = ret + " ago";
				}else{
					ret = "in " + ret;
				}
			}else{
				var weeks = Math.ceil(days / 7.0);
				var s = (weeks == 1) ? "" : "s";
				ret = weeks + " week" + s;
				if(ago){
					ret = ret + " ago";
				}else{
					ret = "in " + ret;
				}
			}
		return ret;
	}

	/**
	 * returns time formatted
	 * yyyy-mm-dd hh:ii:ss
	 */
	this.formatToDateTime = function(d){
		var year = d.getFullYear();
		var month = d.getMonth() + 1;
		if(month < 10) month = "0" + month;
		var day = d.getDate();
		if(day < 10) day = "0" + day;

		var hour = d.getHours();
		if(hour < 10) hour = "0" + hour;
		var minute = d.getMinutes();
		if(minute < 10) minute = "0" + minute;
		var second = d.getSeconds();
		if(second < 10) second = "0" + second;

		return year + "-" + month + "-" + day + " " + hour + ":" + minute + ":" + second;
	}

	/**
	 * returns time formatted
	 * as [h]h:mma
	 */
	this.formatTo12HourTime = function(d){
		var format = settings.getTimeFormat();
		if(format == "3:00p"){
			var hour = d.getHours();
			var minute = d.getMinutes();
			if(minute < 10) minute = "0" + minute;
			var ampm = "a";

			if(hour >= 12){
				ampm = "p";
				hour -= 12;
			}
			if(hour == 0){
				hour = 12;
			}
			return hour + ":" + minute + ampm;
		}else{ // 15:00
			var hour = d.getHours();
			var minute = d.getMinutes();
			if(minute < 10) minute = "0" + minute;
			return hour + ":" + minute;
		}
	}

	/**
	 * returns time formatted
	 * as [h]ha
	 */
	this.formatToHourTime = function(d){
		var format = settings.getTimeFormat();
		if(format == "3:00p"){
			var hour = d.getHours();
			var ampm = "a";

			if(hour >= 12){
				ampm = "p";
				hour -= 12;
			}
			if(hour == 0){
				hour = 12;
			}
			return hour + ampm;
		}else{ // 15
			var hour = d.getHours();
			return hour;
		}
	}

	/**
	 * returns time formatted
	 * yyyy-mm-dd
	 */
	this.formatToStandardTime = function(d){
		var year = "" + d.getFullYear();
		var month = d.getMonth() + 1;
		if(month < 10) month = "0" + month;
		var day = d.getDate();
		if(day < 10) day = "0" + day;

		var hour = d.getHours();
		if(hour < 10) hour = "0" + hour;
		var minute = d.getMinutes();
		if(minute < 10) minute = "0" + minute;
		var second = d.getSeconds();
		if(second < 10) second = "0" + second;
		return year + "-" + month + "-" + day;
	}

	/**
	 * returns date formatted
	 * as mm/dd
	 */
	this.formatToShortDate = function(d){
		var month = d.getMonth()+1;
		var day = d.getDate();

		var format = settings.getDateFormat();
		if(format == "4/30"){
			return month + "/" + day;
		}else{ // 30/4
			return day + "/" + month;
		}
	}

	/**
	 * returns date formatted
	 * as Monday, February 14th, 2005
	 */
	this.formatToLongDate = function(d){
		var tlang = lm.getActiveLanguage();
		var str = tlang.longDay(d.getDay()) + ", ";

		var month = tlang.longMonth(d.getMonth());
		var day = d.getDate();


		var format = settings.getDateFormat();
		if(format == "4/30"){
			if(d.getDate() == 1 || d.getDate() == 21 || d.getDate() == 31){
				day += "st";
			}else
			if(d.getDate() == 2 || d.getDate() == 22){
				day += "nd";
			}else
			if(d.getDate() == 3 || d.getDate() == 23){
				day += "rd";
			}else{
				day += "th";
			}
			str += month + " " + day;
		}else{ // 30/4
			str += day + " " + month;
		}
		str += ", " + d.getFullYear();

		return str;
	}

	/**
	 * returns date formatted
	 * as Mon, Feb 14th, 2005
	 */
	this.formatToMediumDate = function(d){
		var str = that.formatToMediumDateNoYear(d);
		str += ", " + d.getFullYear();

		return str;
	}

	/**
	 * returns date formatted
	 * as Mon, Feb 14th
	 */
	this.formatToMediumDateNoYear = function(d){
		var tlang = lm.getActiveLanguage();
		var str = tlang.shortDay(d.getDay()) + ", ";

		var month = tlang.shortMonth(d.getMonth());
		var day = d.getDate();


		var format = settings.getDateFormat();
		if(format == "4/30"){
			if(d.getDate() == 1 || d.getDate() == 21 || d.getDate() == 31){
				day += "st";
			}else
			if(d.getDate() == 2 || d.getDate() == 22){
				day += "nd";
			}else
			if(d.getDate() == 3 || d.getDate() == 23){
				day += "rd";
			}else{
				day += "th";
			}
			str += month + " " + day;
		}else{ // 30/4
			str += day + " " + month;
		}

		return str;
	}

	/**
	 * returns date formatted
	 * as Feb 14th
	 */
	this.formatToMedDate = function(d){
		var tlang = lm.getActiveLanguage();

		var month = tlang.shortMonth(d.getMonth());
		var day = d.getDate();
		var str = "";
		var format = settings.getDateFormat();
		if(format == "4/30"){
			var sfx = "";
			if(d.getDate() == 1 || d.getDate() == 21 || d.getDate() == 31){
				sfx = "st";
			}else
			if(d.getDate() == 2 || d.getDate() == 22){
				sfx = "nd";
			}else
			if(d.getDate() == 3 || d.getDate() == 23){
				sfx = "rd";
			}else{
				sfx = "th";
			}
			str = month + " " + day + sfx;
		}else{
			str = day + " " + month;
		}

		return str;
	}

	/**
	 * returns date formatted
	 * as Febuary 14th
	 */
	this.formatToMedLongDate = function(d){
		var tlang = lm.getActiveLanguage();

		var month = tlang.longMonth(d.getMonth());
		var day = d.getDate();
		var str = "";
		var format = settings.getDateFormat();
		if(format == "4/30"){
			var sfx = "";
			if(d.getDate() == 1 || d.getDate() == 21 || d.getDate() == 31){
				sfx = "st";
			}else
			if(d.getDate() == 2 || d.getDate() == 22){
				sfx = "nd";
			}else
			if(d.getDate() == 3 || d.getDate() == 23){
				sfx = "rd";
			}else{
				sfx = "th";
			}
			str = month + " " + day + sfx;
		}else{
			str = day + " " + month;
		}

		return str;
	}

	this.getMonthName = function(d){
		var tlang = lm.getActiveLanguage();
		return tlang.longMonth(d.getMonth());
	}
}