/*
	 *	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?)
			var input_id = null;
			
			$results.addClass(options.resultsClass).insertAfter($(input));//appendTo('body');

			resetPosition();
			
			$(window)
				.load(resetPosition)		// just in case user is changing size of page while loading
				.resize(resetPosition)
				.scroll(resetPosition);

			$input.blur(function() {
				setTimeout(function() { $results.hide() }, 200);
			});
			$(window).resize(function() { $results.hide() }).scroll(function() { $results.hide() });
			
			
			// 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
			
			
			// checking if replace options is true
			if(options.isReplace) {
				// adding action to the cancel button
				if(options.inputIdName != '') {
					input_id = $(options.inputIdName);
				} else {
					input_id = $('#'+$input.attr('id')+'_id');
				}
				if(input_id.length) {
					input_id.next().click(cancelReplace);
				}
			}

			function resetPosition() {
				// requires jquery.dimension plugin
				var offset = $input.position();//$input.offset();
				var d = parseInt($input.css('margin-left'));
				d = d?d:0;
				$results.css({
					top: (offset.top + $input.outerHeight({ margin: true })) + 'px',
					left: (offset.left + d) + 'px'
				});
			}
			
			function cancelReplace(e){
				e.preventDefault();
				
				if(!options.isReplace) return;

				// cleaning value
				input_id.val(0);
				$input.val('');
				
				// removing action for clicking
				//input_id.next().unbind('click');
				
				// hidding selected item
				input_id.parent().hide();
				
				// showing edit input for suggesting
				$input.parent().show();
				// checking if previous of edit is info then showing info
				if($input.parent().prev().hasClass('info')) {
					$input.parent().prev().show();
				}
				$input.focus();
			}
			
			
			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());

				if (q.length >= options.minChars) {
					$input.addClass(options.loadingClass);					
					cached = checkCache(q);
					
					if (cached) {
					
						displayItems(cached['items']);
						
					} else {
					
						vstr = '';
						
						// checking if multiple parameters
						if(options.v) {
							if(!isArray(options.v)){
								vstr = $(options.v).val();
							} else {
								for(var i=0;i<options.v.length;i++) {
									if($(options.v[i]))
										vstr += "," + $(options.v[i]).val();
								}
							}
						}

			            // AJAX request
			            $.ajax({
			            	url: options.source,
			            	type: 'POST',
			            	dataType: 'json',
			            	data: { q: q, v: vstr },
			            	success: function(data) {
								$input.removeClass(options.loadingClass);

			            		if(data.status != 'ok') return;

								$results.hide();
								
								var items = data.result;
								
								if(items && !items.length) {
									items = [{id: 0, name: items}]; 
								}
								
								displayItems(items);
								addToCache(q, items, items.length);
			            	},
			            	error: function() {
								$input.removeClass(options.loadingClass);
			            	},
			            	timeout: function() {
								$input.removeClass(options.loadingClass);
			            	}
			            });
						
					}
					
				} else {
					$input.removeClass(options.loadingClass);
					$results.hide();
				}
					
			}
			
			
			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) {
				
				$input.removeClass(options.loadingClass);
				if (!items)
					return;
					
				if (!items.length) {
					$results.hide();
					return;
				}
				
				resetPosition();
				
				var html = '';
				for (var i = 0; i < items.length; i++) {
					html += '<li rel="'+items[i].id+'">' + items[i].name + '</li>';
				}

				$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 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();
			
				$results.hide();
				if ($currentResult) {
					if(options.isReplace && $currentResult.attr('rel')) {
						// hidding edit
						$input.parent().hide();

						// checking if previous of edit is info then hiding info
						if($input.parent().prev().hasClass('info')) {
							$input.parent().prev().hide();
						}
						
						// showing selected
						input_id.parent().show();
						input_id.val($currentResult.attr('rel'));
						//input_id.next().click(cancelReplace);
						input_id.next().next().html($currentResult.html());
					} else {
						if (options.onSelect) {
							options.onSelect($currentResult.attr('rel'), $currentResult.text(), $input, $currentResult.html());
						} else {
							$input.val($currentResult.text());
						}
					}
				}
			
			}
			
			function nextResult() {
			
				$currentResult = getCurrentResult();
			
				if ($currentResult)
					$currentResult
						.removeClass(options.selectClass)
						.next()
							.addClass(options.selectClass);
				else
					$results.children('li:first-child').addClass(options.selectClass);
			
			}
			
			function prevResult() {
				$currentResult = getCurrentResult();
			
				if ($currentResult) {
					$currentResult
						.removeClass(options.selectClass)
						.prev()
						.addClass(options.selectClass);
				} else {
					$results.children('li:last-child').addClass(options.selectClass);
				}
			}
	
		}
		
		$.fn.suggest = function(source, options) {
		
			if (!source) return;
				
			var options = $.extend({
				delay: 100,
				resultsClass: 'ac_results',
				selectClass: 'ac_over',
				matchClass: 'ac_match',
				loadingClass: 'ac_loading',
				minChars: 2,
				delimiter: '\n',
				onSelect: false,
				maxCacheSize: 65536,
				isReplace: true,
				inputIdName: ''
			}, options);
			
			options.source = source;
		
			this.each(function() {
				new $.suggest(this, options);
			});
	
			return this;
			
		};
		
	})(jQuery);