/**
 * Скрипт для фильтра топиков
 */

var Day;
var Month;
var MinYear = 2005;
var curYear;
var Year;
var DaysArr = new Array(
	31,28,31,30,31,30,31,31,30,31,30,31
);

var Filter_sort = 'p';
var Filter_rating = 'all';
var Filter_type = 'all';

function getCurDay() {
	var lsToday = new Date();
	this.curYear = lsToday.getFullYear();
	if(this.setFilterDay !== undefined) {
		this.Day = this.setFilterDay;
	} else {
		this.Day = lsToday.getDate();
	}
	if(this.setFilterMonth !== undefined) {
		this.Month = this.setFilterMonth - 1;
	} else {
		this.Month = lsToday.getMonth();
	}
	if(this.setFilterYear !== undefined) {
		this.Year = this.setFilterYear;
	} else {
		this.Year = this.curYear;
	}
	if(this.setFilterSort !== undefined) {
		$('filter_sort_value').value = this.setFilterSort;
		this.Filter_sort = this.setFilterSort;
	}
	if(this.setFilterRating !== undefined) {
		$('filter_rating_value').value = this.setFilterRating;
		this.Filter_rating = this.setFilterRating;
	}
	if(this.setFilterType !== undefined) {
		$('filter_type_value').value = this.setFilterType;
		this.Filter_type = this.setFilterType;
	}

	this.setDate();

	$('filter_month_prev').addEvent('click', function(event){
		changeDate('m','-1');
	});

	$('filter_month_next').addEvent('click', function(event){
		changeDate('m','1');
	});

	$('filter_year_prev').addEvent('click', function(event){
		changeDate('y','-1');
	});

	$('filter_year_next').addEvent('click', function(event){
		changeDate('y','1');
	});

	$('filter_sort_value').addEvent('change', function(event){
		changeSort();
	});

	$('filter_rating_value').addEvent('change', function(event){
		changeRating();
	});

	$('filter_type_value').addEvent('change', function(event){
		changeType();
	});

}

function buttonClick() {
	document.location = DIR_WEB_ROOT + '/filter/' + this.Year + '-' + (this.Month+1) +(this.setFilterDay !== undefined ? '-' + this.Day : '') + '/' + this.Filter_sort + '/' + this.Filter_rating + '/' + this.Filter_type;
}

/**
 * Установка дней в феврале в зависимости от високосности года
 */
function setFebDays() {
	if(this.Year % 4 == 0) {
		this.DaysArr[1] = 29;
	} else {
		this.DaysArr[1] = 28;
	}
}


function setDate() {
	month_value = '<a href="' + DIR_WEB_ROOT + '/filter/' + this.Year + '-' + (this.Month+1) + '/' + this.Filter_sort + '/' + this.Filter_rating + '/' + this.Filter_type + '">' + this.MonthArr[this.Month] + '</a>';
	$('filter_month_value').innerHTML = month_value;
	$('filter_year_value').innerHTML = this.Year;
	this.setFebDays();
	this.setDays();
}

function setDays() {
	DaysNum = this.DaysArr[this.Month] + 1;
	result = '';
	for (var i=1;i<DaysNum; i++) {
		result += '<a href="' + DIR_WEB_ROOT + '/filter/' + this.Year + '-' + (this.Month+1) + '-' + i + '/' + this.Filter_sort + '/' + this.Filter_rating + '/' + this.Filter_type + '"' + ((this.setFilterDay !== undefined && i == this.Day) ? ' class="active"' : '') +'>' + i + '</a>';
	}
	$('filter_days').innerHTML = result;
}

function changeDate(type,value) {
	switch (type) {
		case 'y':
			if(value < 0 && this.Year > this.MinYear) {
				this.Year--;
			} else if (value > 0 && this.Year < this.curYear) {
				this.Year++;
			}
			break;
		case 'm':
			if(value < 0) {
				this.Month--;
				if(this.Month < 0) {
					this.Month = 11;
				}
			} else {
				this.Month++;
				if(this.Month > 11) {
					this.Month = 0;
				}
			}
			break;
	}
	this.setDate();
	if (this.Year == this.curYear) {
		$('filter_year_next').removeClass('active');
		$('filter_year_next').addClass('default');
	} else {
		$('filter_year_next').removeClass('default');
		$('filter_year_next').addClass('active');
	}
	if (this.Year == this.MinYear) {
		$('filter_year_prev').removeClass('active');
		$('filter_year_prev').addClass('default');
	} else {
		$('filter_year_prev').removeClass('default');
		$('filter_year_prev').addClass('active');
	}
}



function changeSort() {
	this.Filter_sort = $('filter_sort_value').value;
	this.setDate();
}

function changeRating() {
	this.Filter_rating = $('filter_rating_value').value;
	this.setDate();
}

function changeType() {
	this.Filter_type = $('filter_type_value').value;
	this.setDate();
}

getCurDay();