/*
 *	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
 *
 */

var globalRequestCounter = 0;
(function($) {

	$.suggest = function(input, options) {

		var $input = $(input).attr("autocomplete", "off");
		var $results = $(document.createElement("ul"));
        var $resultsId = $input.id + '-results';
        $results.id = $resultsId;
        var $requestSeqNumber = 0; 

        /* vybrat na focus cely obsah fieldu */
        $input.focus(function(){this.select()});
        
        if ($input.id)
            $results.id = $input.id + '-results';

		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() { hideResults(); }, 200);
		});
		
		$input.focus(function(){
			resetPosition();
		})

        if (options.enableFocus) {
            $input.focus(function(e) {
                if (e.preventDefault)
	                e.preventDefault();
				if (e.stopPropagation)
	                e.stopPropagation();
                suggest(true, 'focus');
            });
        }
        if (options.enableDblclick) {
            $input.dblclick(function(e) {
                if (e.preventDefault)
	                e.preventDefault();
				if (e.stopPropagation)
	                e.stopPropagation();
                suggest(true, 'dblClicked');
            });
        }
        $input.bind("manualTriggered", function(e) {
            if (e.preventDefault)
                e.preventDefault();
            if (e.stopPropagation)
                e.stopPropagation();
            resetPosition();
            suggest(true, 'externalTriggered');
        });
        $input.bind("manualTriggered2", function(e) {
            if (e.preventDefault)
                e.preventDefault();
            if (e.stopPropagation)
                e.stopPropagation();
            resetPosition();
            suggest(true, 'externalTriggered2');
        });
		
		
		// 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
		



		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|^9$/.test(e.keyCode) && $results.is(':visible')) ||
				(/^13$$/.test(e.keyCode) && getCurrentResult())) {

                if (e.keyCode != 9) {
                    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 13: // return
						selectCurrentResult();
                        if (options.cummulative) {
                            $input.focus();
                            var val = $input.val()
                            $input.val('');
                            $input.val(val);
                        }
						break;
                
					case 9:  // tab
                        $('ul.ac_results').hide();
                        break;
					case 27: //	escape
						hideResults();
						break;

				}
				
			} else if ($input.val().length != prevLength) {

				if (timeout) 
					clearTimeout(timeout);
				timeout = setTimeout(suggest, options.delay);
				prevLength = $input.val().length;
			}			
				
			
		}
		function suggest() {
            suggest(false, null);
        }
		
		function suggest(force, eventName) {
            $input.addClass("loading");
            $requestSeqNumber = ++globalRequestCounter

            options.eventName = eventName;
            var sug = options;

			var q = $.trim(formQuery($input.val()));
			if (q.length >= options.minchars || force) {
				//cached = checkCache(q);
				
				if (false && cached) {
				
					displayItems(cached['items']);
					
				} else {
                    var addParams = '';
                    var url = options.source;
                    if (options.callBack) {
                        addParams = options.callBack(options, $input);
                    } else if (options.paramName) {
                        addParams += "&" + options.paramName + "=" + q;
                    }
                    if (addParams)
                        url += addParams;
					$.get(url, {q: q}, function(txt) {
                        /* is this the newest request? if not, don't do anything */
                        if ($requestSeqNumber < globalRequestCounter) {
                            $input.removeClass("loading");
                            return;
                        }
						hideResults();
						
						var items = parseTxt(txt, q, false);
                        
                        if (items[0] == 'OK-SINGLE' && options.autoSelectSingleResult) {
                            $input.val(parseValueFromResult(items[1]));
                            $input.removeClass("loading");
                            hideResults();
                            if (options.onSelect) {
					            options.onSelect.apply($input[0]);
                            }
                            $input.trigger('suggestionSelected');
                        } else {
                            items = parseTxt(txt, q, true);
						    displayItems(items);
						    addToCache(q, items, txt.length);
                        }
					});
					
				}
				
			} else {
				hideResults();
				
			}
				
		}

        function formQuery(val) {
            if (!val) {
                return val;
            }
            var index = val.lastIndexOf(",");
            if (index == -1) {
                return val;
            }
            var query = val.substr(index + 1, val.length);
            query = query.trim();
            if (!query) {
                return '';
            }

            return query;
        }

		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) {
				return;
			}
			var statusOK = isOk(items[0]);
			var html = '';
            /* first should be always a status message */
			for (var i = 1; i < items.length; i++) {
                if (statusOK)
				    html += '<li>' + items[i] + '</li>';
                else
                    html += '<li class="nonactive">' + items[i] + '</li>';
            }
            /*$('ul.ac_results').each(function(i){
                var currentFieldSuggestionId = $input.id;
                if (this.id != currentFieldSuggestionId + '-results') {
                    $(this).hide();
                }
            });*/
			$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 hideResults() {
            $results.hide();
            $input.removeClass("loading");
        }

        function isOk(code) {
            return (code == 'OK') || (code == 'OK-SINGLE');
        }
		
		function parseTxt(txt, q, highlight) {
			
			var items = [];
			var tokens = txt.split(options.delimiter);
			// parse returned data for non-empty items
			for (var i = 0; i < tokens.length; i++) {
                //lets look at the status
                var statusOk = true;
                if (i == 0) {
                    var isStatusToken = tokens[0].indexOf("__STATUS=") != -1;
                    if ( isStatusToken) {
                        // cut the '__STATUS=' from token and get just the code
                        var statusCode = tokens[0].substring(9, tokens[0].length);
                        items[0] = statusCode;
                        statusOk = isOk(statusCode);
                        continue;
                    }
                }

                var token = $.trim(tokens[i]);
                /* highlighting only, if status is ok */
                if (token && statusOk && highlight) {
                        token = token.replace(
                        new RegExp(q, 'ig'),
                            function(q) { return '<span class="' + options.matchClass + '">' + q + '</span>' }
                            );
                        items[items.length] = token;
                } else {
                    items[items.length] = token;
                }
			}
			return items;
		}
		
		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();
            var tmp = $currentResult;
            if (tmp.hasClass("nonactive")) return;
			if ($currentResult) {
                var plaintextRes = $currentResult.text();
                if (options.parseValueFromResult) {
                    plaintextRes = parseValueFromResult(plaintextRes);
                }

				$input.val(insertVal(plaintextRes));
				$('ul.ac_results').hide();
				
				$input.trigger('blur');

				if (options.onSelect)
					options.onSelect.apply($input[0]);
				$input.trigger('suggestionSelected');
                /* user has selected text, now chechk if we can autosuggest another field */
                
               /* if (options.autoSuggestField) {
                    var anotherField = $(options.autoSuggestField);
                    alert(anotherField);
                    anotherField.autoSuggest();
                }*/
					
			}
		
		}

        function insertVal(val) {
            if (!options.cummulative) {
                return val;
            }
            var inputVal = $input.val().trim();
            var index = inputVal.lastIndexOf(',');

            if (index == -1) {
                return val;
            }
            var firstPart = inputVal.substr(0, index);
            return firstPart + ', ' + val.trim();
        }

        function parseValueFromResult(text) {
            var splittedText = text.split(options.resultValueDelimiter);
            if (splittedText[0]) {
                return $.trim(splittedText[0]);
            } else {
                return splittedText[0];
            }
        }
		
		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 ($currentResult)
			if ($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;
		options = options || {};
		options.source = source;
		options.delay = options.delay || 200;
		options.resultsClass = options.resultsClass || 'ac_results';
		options.selectClass = options.selectClass || 'ac_over';
		options.matchClass = options.matchClass || 'ac_match';
		options.minchars = options.minchars || 2;
		options.delimiter = options.delimiter || '\n';
		options.onSelect = options.onSelect || false;
		options.maxCacheSize = options.maxCacheSize || 65536;
		options.parseValueFromResult = options.parseValueFromResult || true;
		options.resultValueDelimiter = options.resultValueDelimiter || "|";
        options.cummulative = options.cummulative || false;

		this.each(function() {
            new $.suggest(this, options);
		});

		return this;
		
	};

    $.fn.suggestWithCallback = function(source, options, callBack) {
		if (!source)
			return;
        
        options = options || {};
		options.source = source;
		options.delay = options.delay || 200;
		options.resultsClass = options.resultsClass || 'ac_results';
		options.selectClass = options.selectClass || 'ac_over';
		options.matchClass = options.matchClass || 'ac_match';
		options.minchars = options.minchars || 2;
		options.delimiter = options.delimiter || '\n';
		options.onSelect = options.onSelect || false;
		options.maxCacheSize = options.maxCacheSize || 65536;
		options.parseValueFromResult = options.parseValueFromResult || true;
		options.resultValueDelimiter = options.resultValueDelimiter || "|";
        options.callBack = callBack;
        options.cummulative = options.cummulative || false;
        
		this.each(function() {
            new $.suggest(this, options);
		});

		return this;

	};
	
})(jQuery);