(function ($) {
	$.fn.text_slider = function (options) {
		/*** Default Settings ***/
		var settings = $.extend(
			{
				timeout: 5000,
				slide_time: 750,
				img_path: 'img',
				css_path: 'css',
			},
			options 
		);
		var next_item;
		var current_item = 0;
		var count = 0;
		var max_height = 0;
		var list_obj = this;
		var play_loop = true;
		var timeout_obj = null;
		
		/*** Load Stylesheet ***/
		if (document.createStyleSheet) {
			document.createStyleSheet(settings.css_path + '/text_slider.css');
		} else {
			$("head").append($('<link rel="stylesheet" href="' + settings.css_path + '/text_slider.css" type="text/css" media="screen" />'));
		}

		this.addClass('ts_container');
		/*
		this.css({
			position: 'relative',
			listStyleType: 'none',
			padding: 0,
		});
		*/
		
		this.append('<div class="ts_arrow_left"><span class="ts_helper"></span><img class="ts_control" src="' + settings.img_path + '/gallery_arrow_left.png" alt="arrow left" onclick="transition2(-1);" /></div>');
		this.append('<div class="ts_arrow_right"><span class="ts_helper"></span><img class="ts_control" src="' + settings.img_path + '/gallery_arrow_right.png" alt="arrow right" /></div>');
		this.append('<div class="ts_control"><img class="ts_control" id="ts_play_control" src="' + settings.img_path + '/gallery_button_pause.png" alt="pause play" /></div>');
		this.append('<div class="ts_slide_next"></div>');
		this.append('<div class="ts_slide_current"></div>');
		
		$('.ts_arrow_right').click(function(e) {
			e.preventDefault();
			//clearTimeout(timeout_obj);
			transition(+1);
		});
		$('.ts_arrow_left').click(function(e) {
			e.preventDefault();
			//clearTimeout(timeout_obj);
			transition(-1);
		});
		$('#ts_play_control').click(function() {
			if (play_loop) {
				$(this).attr('src', settings.img_path + '/gallery_button_play.png');
				clearTimeout(timeout_obj);
				play_loop = false;
			} else {
				$(this).attr('src', settings.img_path + '/gallery_button_pause.png');
				timeout_obj = setTimeout(transition, settings.timeout);
				play_loop = true;
			}
		});

		
		this.children('li').each(
			function () {
				$(this).addClass('slide-' + (count)).addClass('ts_item');
				count++;
			}
		);
		/*
		this.children('li').each(
			function () {
				$(this).addClass('slide-' + (count)).css({
							opacity: 0,
							whiteSpace: 'normal',
							position: 'absolute',
							top: 0,
							left: 0,
							right: 0,
				});
				count++;
			}
		);
		
		setTimeout(function() {
			list_obj.children('li').each(
				function () {
					if ($(this).outerHeight(true) > max_height) {
						max_height = $(this).outerHeight(true);
					}
					//*** vertically center text ***
					$(this).css({
						height: $(this).outerHeight(true) + 'px',
						bottom: 0,
						margin: 'auto',
					});
				}
			);
			
			list_obj.css({
				height: max_height + 'px',
			});
		}, 500);
		*/

		function first_slide() {
			//$('.slide-' + current_item).animate({opacity: 1 }, settings.slide_time);
			$('.ts_slide_current').html('<div class="ts_helper"></div><div class="ts_slide_inner">' + $('.slide-' + current_item).html() + '</div>');
			timeout_obj = setTimeout(transition, settings.timeout);
		}

		function transition(offset) {
			if ($('.ts_slide_current').first().is(':animated')) {
				return;
			}
			clearTimeout(timeout_obj);
			offset = offset || 1;
			next_item = parseInt (current_item + offset);
			if (next_item >= count) {
				next_item = 0;
			} else if (next_item < 0) {
				next_item = count - 1;
			}
			var start_offset = offset * 100;
			var start_offset = start_offset + '%';
			var end_offset = offset * 100 * -1;
			var end_offset = end_offset + '%';
			var elem_current = $('.ts_slide_current').first();
			var elem_next = $('.ts_slide_next').first();
			$('.ts_slide_next').html('<div class="ts_helper"></div><div class="ts_slide_inner">' + $('.slide-' + next_item).html() + '</div>').css({left: start_offset});
			$('.ts_slide_current').first().animate({left: end_offset}, settings.slide_time, function() {
			});
			$('.ts_slide_next').first().animate({left: 0}, settings.slide_time, function() {
				elem_current.toggleClass('ts_slide_next');
				elem_current.toggleClass('ts_slide_current');
				elem_next.toggleClass('ts_slide_next');
				elem_next.toggleClass('ts_slide_current');
			});
			current_item = next_item;
			if (play_loop) {
				timeout_obj = setTimeout(transition, settings.timeout);
			}
		}
		
		return first_slide ();
	};
}(jQuery));