/*
Yetii - Yet (E)Another Tab Interface Implementation
version 1.2
http://www.kminek.pl/lab/yetii/
Copyright (c) 2007-2008 Grzegorz Wojcik
Code licensed under the BSD License:
http://www.kminek.pl/bsdlicense.txt
*/

function Yetii() {
	this.defaults = {
		id: null,
		active: 1,
		interval: null,
		wait: null,
		tabclass: 'tab',
		activeclass: 'active',
		callback: null
	};

	for (var n in arguments[0]) { this.defaults[n] = arguments[0][n]; }

	this.getTabs = function() {
		var retnode = [];
		var elem = document.getElementById(this.defaults.id).getElementsByTagName('*');

		var regexp = new RegExp("(^|\\s)" + this.defaults.tabclass.replace(/\-/g, "\\-") + "(\\s|$)");

		for (var i = 0; i < elem.length; i++) {
			if (regexp.test(elem[i].className)) { retnode.push(elem[i]); }
		}

		return retnode;
	};

	this.links = document.getElementById(this.defaults.id + '-nav').getElementsByTagName('a');

	this.show = function(number) {
	        for (var i = 0; i < this.tabs.length; i++) {
			this.tabs[i].style.display = ((i+1)==number) ? 'block' : 'none';
			this.links[i].className = ((i+1)==number) ? this.defaults.activeclass : '';
		}

		this.defaults.active = number;
		if (this.defaults.callback) { this.defaults.callback(number); }
	};

	this.rotate = function(interval) {
		this.show(this.defaults.active);
		this.defaults.active++;

		if(this.defaults.active > this.tabs.length) { this.defaults.active = 1; }

	        var self = this;

		if (this.defaults.wait) { clearTimeout(this.timer2); }

		this.timer1 = setTimeout(function(){self.rotate(interval);}, interval*1000);
	};
	
	this.next = function() {
		this.defaults.active++;
		if (this.defaults.active > this.tabs.length) { this.defaults.active = 1; }
		this.show(this.defaults.active);
	};

	this.previous = function() {

		this.defaults.active--;
		if (!this.defaults.active) { this.defaults.active = this.tabs.length; }
		this.show(this.defaults.active);
	};

	this.tabs = this.getTabs();
	this.show(this.defaults.active);

	this.lol = function() {
		self.rotate(self.defaults.interval);
	};

	var self = this;
	for (var i = 0; i < this.links.length; i++) {
		this.links[i].customindex = i+1;
		this.links[i].onclick = function() { 
			if (self.timer1) { clearTimeout(self.timer1); }
			if (self.timer2) { clearTimeout(self.timer2); }

			self.show(this.customindex);

			if (self.defaults.wait) {
				self.timer2 = setTimeout(self.lol, self.defaults.wait*1000);
			}

			return false;
		};
	}

	if (this.defaults.interval) { this.rotate(this.defaults.interval); }

}