/*
 *	jquery.suggest 1.1 - 2007-08-06
 *	
 *	Uses code and techniques from following libraries:
 *	1. http://www.dyve.net/jquery/?autocomplete
 *	2. http://dev.jquery.com/browser/trunk/plugins/interface/iautocompleter.js	
 *
 *	All the new stuff written by Peter Vulgaris (www.vulgarisoip.com)	
 *	Feel free to do whatever you want with this file
 *
 */
	
	(function($) {
		$.suggest = function(input, options) {
			var $input = $(input).attr("autocomplete", "off");
			var $results = $(document.createElement("ul"));

			var timeout = false;		// hold timeout ID for suggestion results to appear	
			var prevLength = 0;			// last recorded length of $input.val()
			var cache = [];				// cache MRU list
			var cacheSize = 0;			// size of cache in chars (bytes?)
			
			$results.addClass(options.resultsClass).appendTo('body');
				
			resetPosition();
			$(window)
				.load(resetPosition)		// just in case user is changing size of page while loading
				.resize(resetPosition);

			$input.blur(function() {
				setTimeout(function() { $results.hide() }, 200);
			});

			// I really hate browser detection, but I don't see any other way
			if ($.browser.opera)
				$input.keypress(processKey);	// onkeypress repeats arrow keys in Opera
			else
				$input.keydown(processKey);		// onkeydown repeats arrow keys in Mozilla/IE/Safari
			
			function resetPosition() {
				// requires jquery.dimension plugin
				var offset = $input.offset();
				$results.css({
					top: (offset.top + input.offsetHeight) + 'px',
					left: offset.left + 'px'
				});
			}
			
			function processKey(e) {
				// handling up/down/escape requires results to be visible
				// handling enter/tab requires that AND a result to be selected
				if ((/27$|38$|40$/.test(e.keyCode) && $results.is(':visible')) ||
					(/^13$|^9$/.test(e.keyCode) && getCurrentResult())) {
		            
		            if (e.preventDefault)
		                e.preventDefault();
					if (e.stopPropagation)
		                e.stopPropagation();

					e.cancelBubble = true;
					e.returnValue = false;
				
					switch(e.keyCode) {
						case 38: // up
							prevResult();
							break;
						case 40: // down
							nextResult();
							break;
						case 9:  // tab
						case 13: // return
							selectCurrentResult();
							break;
						case 27: //	escape
							$results.hide();
							break;
	
					}
				} else if ($input.val().length != prevLength) {
					if (timeout) clearTimeout(timeout);
					timeout = setTimeout(suggest, options.delay);
					prevLength = $input.val().length;
				}			
			}
			
			function suggest() {
				var q = $.trim($input.val());
				
				//alert($input.val());
				
				if (q.length >= options.minchars) {
					cached = checkCache(q);
					if (cached) {
						displayItems(cached['items']);
					} else {
						var obj = new Object();
						obj.action = options.action;
						obj.q = q;
						$.post(options.source, obj, function(res) {
							$results.hide();
							var items = parseTxt(res.item, q);
							displayItems(items);
							addToCache(q, items, getSize(items));
						}, 'json');
					}
				} else {
					$results.hide();
				}
			}
			
			//calc size array for cache
			function getSize(items) {
				var str = items.join(' ');
				return str.length;
			}			
			
			function checkCache(q) {
				for (var i = 0; i < cache.length; i++)
					if (cache[i]['q'] == q) {
						cache.unshift(cache.splice(i, 1)[0]);
						return cache[0];
					}
				
				return false;
			}
			
			function addToCache
				(q, items, size) {
				while (cache.length && (cacheSize + size > options.maxCacheSize)) {
					var cached = cache.pop();
					cacheSize -= cached['size'];
				}
				
				cache.push({
					q: q,
					size: size,
					items: items
					});
					
				cacheSize += size;
			}
			
			function displayItems(items) {
				if (!items) return;
					
				if (!items.length) {
					$results.hide();
					return;
				}


				var html = '';
				for (var i = 0; i < items.length; i++) html += '<li style="display:block; overflow:hidden; zoom:1" ><div class="sug_text" style="float:left;">' + items[i].name + '</div><div style="float:right">' + items[i].cnt + '</div></li>';
					
				//fix bgiframe
				try{
					$results.html(html).show().bgiframe();
				} catch(e){
					$results.html(html).show();
				}
					
				$results
					.children('li')
					.mouseover(function() {
						$results.children('li').removeClass(options.selectClass);
						$(this).addClass(options.selectClass);
					})
					.click(function(e) {
						e.preventDefault(); 
						e.stopPropagation();
						selectCurrentResult();
					});
			}
			
			function parseTxt(item, q) {
				var items = [];
				// parse returned data for non-empty items
				for (var i = 0; i < item.length; i++) {
					//var token = $.trim(item[i].name);
					var token = item[i].name;
					if (token) {
						token = token.replace(
							new RegExp(q, 'ig'), 
							function(q) { return '<span class="' + options.matchClass + '">' + q + '</span>' }
							);
						items[items.length] = {'name': token, 'cnt': item[i].cnt};
					}
				}
				return items;
			}
			
			function getCurrentResult() {
				if (!$results.is(':visible'))
					return false;

				var $currentResult = $results.children('li.' + options.selectClass).children('div.sug_text');
				
				if (!$currentResult.length)
					$currentResult = false;
					
				return $currentResult;
			}
			
			function selectCurrentResult() {
				$currentResult = getCurrentResult();
			
				if ($currentResult) {
					$input.val($currentResult.text());
					$results.hide();
					
					if(options.load_photo)
						load_product_photo();

					if (options.onSelect)
						options.onSelect.apply($input[0]);
						
				}
			}
			
			function nextResult() {
				$currentResult = getCurrentResult();
				//alert($currentResult);
				if ($currentResult)
				{
					$currentResult.parent().removeClass(options.selectClass).next().addClass(options.selectClass);
					//alert($currentResult.attr('style'));
				}else{
				//	alert($results.children('li:first').attr('style'));
					$results.children('li:first').addClass(options.selectClass);
				}
					
			}
			
			function prevResult() {
				$currentResult = getCurrentResult();
			
				if ($currentResult)
					$currentResult.parent()
						.removeClass(options.selectClass)
						.prev()
							.addClass(options.selectClass);
				else
					$results.children('li:last').addClass(options.selectClass);
			
			}
		}
		
		$.fn.suggest = function(source, options) {
			if (!source)
				return;
		
			options = options || {};
			options.source = source;
			options.delay = options.delay || 100;
			options.resultsClass = options.resultsClass || 'ac_results';
			options.selectClass = options.selectClass || 'ac_over';
			options.matchClass = options.matchClass || 'ac_match';
			options.minchars = options.minchars || 2;
			options.onSelect = options.onSelect || false;
			options.maxCacheSize = options.maxCacheSize || 65536;
			options.action = options.action || 'SuggestProduct'; 
	
			this.each(function() {
				new $.suggest(this, options);
			});
	
			return this;
		};
		
	})(jQuery);