/*
 *	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 = $("#suggestResults");
		if (!$results.length) {
			$(document.body).append('<ul id="suggestResults"></ul>');
			$results=$("#suggestResults");
		}
		
		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?)
		
		
		function resetCache(){
			cache=[];
			cacheSize=0;
		}
		
		$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() {
			if (timeout) clearTimeout(timeout);
			if (options.directSuggest) resultHide();
			else setTimeout(function() { resultHide() }, 200);
		});
		
		// help IE users if possible
		try {
			$results.bgiframe();
		} catch(e) { }

		// I really hate browser detection, but I don't see any other way
		if ($.browser.mozilla)
			$input.keypress(processKey);	// onkeypress repeats arrow keys in Mozilla/Opera
		else
			$input.keydown(processKey);		// onkeydown repeats arrow keys in IE/Safari
		
		if (options.directSuggest) $input.focus( function(){
			if (timeout) clearTimeout(timeout);
			timeout = setTimeout(suggest, options.delay);
		});
		
		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
						resultHide();
						break;

				}
				
			} else if ($input.val().length != prevLength) {
				if (timeout) clearTimeout(timeout);
				timeout = setTimeout(suggest, options.delay);
				prevLength = $input.val().length;
			}
			
		}
		
		
		function suggest() {
		
			var aranan = $.trim($input.val());
			if ( (!options.data) && ($input.attr("resetted")=="resetted") ) {
				resetCache();
				$input.removeAttr("resetted");
			};
			
			if (aranan.length >= options.minchars) {
				if (options.data) {
					displayItems(parseData(aranan));
				}else{
					cached = checkCache(aranan);
					if (cached) {
						displayItems(cached['items']);
					} else {
						$.get(options.source, {aranan: aranan, tip:options.tip, istekId:options.istekId}, function(txt) {
							resultHide();
							
							var items = parseTxt(txt, aranan);
							
							displayItems(items);
							addToCache(aranan, items, txt.length);
						});
					}
				}
			} else {
				resultHide();
			}
		}
		
		function checkCache(aranan) {
			for (var i = 0; i < cache.length; i++)
				if (cache[i]['aranan'] == aranan) {
					cache.unshift(cache.splice(i, 1)[0]);
					return cache[0];
				}
			
			return false;
		}
		
		function addToCache(aranan, items, size) {
		
			while (cache.length && (cacheSize + size > options.maxCacheSize)) {
				var cached = cache.pop();
				cacheSize -= cached['size'];
			}
			
			cache.push({
				aranan: aranan,
				size: size,
				items: items
				});
				
			cacheSize += size;
		
		}
		
		function displayItems(items) {
			if (!items)
				return;
				
			if (!items.length) {
				resultHide();
				return;
			}
			
			var html = '';
			for (var i = 0; i < items.length; i++) {
				html += '<li><span class="label"><b>' + items[i][0] + '</b></span>' + ((items[i][1])?': '+items[i][1]:'') +'</li>';
			}
			$results.html(html).children('li').click(function(e) {
				e.preventDefault(); 
				e.stopPropagation();
				selectCurrentResult();
			});
			if (!options.disableMouseOver) {
				$results.children('li').mouseover(function() { 
					$results.children('li').removeClass(options.selectClass);
					$(this).addClass(options.selectClass);
				})
			}
			resultShow();
		}
		
		function parseData(aranan) {
			var items = [];
			
			// parse returned data for non-empty items
			$.each(options.data, function(key, description){
				if (!options.disableFilterResults && key.indexOf(aranan)==-1) return;
				var token = [key, description];
				token[0] = token[0].replace( new RegExp(aranan, 'ig'), function(aranan) {
					return '<span class="' + options.matchClass + '">' + aranan + '</span>';
				});
				items.push(token);
			});
			return items;
		}
		
		function parseTxt(txt, aranan) {
			var items = [];
			var tokens = txt.split(options.delimiter);
			
			// parse returned data for non-empty items
			for (var i = 0; i < tokens.length; i++) {
				var token = $.trim(tokens[i]).split(",");
				if (token[0]) {
					token[0] = token[0].replace( new RegExp(aranan, 'ig'), function(aranan) {
						return '<span class="' + options.matchClass + '">' + aranan + '</span>'
					});
					items.push(token);
				}
			}
			return items;
		}
		
		function resultShow(){
			resetPosition();
			$results.show();
			checkSelected();
		}
		
		function resultHide(){
			$results.hide();
			checkSelected();
		}
		
		function checkSelected(){
			$input.attr("itemSelected",(getCurrentResult())?"1":"0");
		}
		
		function getCurrentResult() {
		
			if (!$results.is(':visible'))
				return false;
		
			var $currentResult = $results.children('li.' + options.selectClass);
			
			if (!$currentResult.length)
				$currentResult = false;
				
			return $currentResult;

		}
		
		function selectCurrentResult() {
		
			$currentResult = getCurrentResult();
		
			if ($currentResult) {
				$input.val($currentResult.find(".label").text());
				$input.attr("itemId", $currentResult.find(".itemId").text());
				$input.attr("itemType", $currentResult.find(".itemType").text());
				resultHide();
				
				if (options.onSelect) options.onSelect.apply($input[0]);
			}
		
		}
		
		function nextResult() {
		
			$currentResult = getCurrentResult();
		
			if ($currentResult)
				$currentResult
					.removeClass(options.selectClass)
					.next()
						.addClass(options.selectClass);
			else
				$results.children('li:first-child').addClass(options.selectClass);
			
			checkSelected();
		}
		
		function prevResult() {
		
			$currentResult = getCurrentResult();
		
			if ($currentResult)
				$currentResult
					.removeClass(options.selectClass)
					.prev()
						.addClass(options.selectClass);
			else
				$results.children('li:last-child').addClass(options.selectClass);
		
			checkSelected();
		}

	}
	
	$.fn.suggest = function(source, options) {
	
		if ( (!source) && (!options.data) ) return;
	
		options = options || {};
		options.source = source;
		options.data = options.data || false; //eklenti.
		options.istekId = options.istekId || ''; //eklenti.
		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.disableMouseOver = options.disableMouseOver || false;
		options.delimiter = options.delimiter || '\n';
		options.onSelect = options.onSelect || false;
		options.directSuggest = options.directSuggest || false;
		options.disableFilterResults = options.disableFilterResults || false;
		options.maxCacheSize = options.maxCacheSize || 65536;
		
		this.each(function() {
			if ($(this).attr("readonly")!="readonly") new $.suggest(this, options);
		});
		
		return this;
	};
	
})(jQuery);