(function ($) {
    var self = null;

    $.fn.autoComplete = function (o) {
        o = jQuery.extend({
            valueSep: ';',
            minchars: 1,
            meth: "get",
            varname: "input",
            className: "autocomplete",
            timeout: 5000,
            delay: 100,
            offsety: -5,
            shownoresults: false,
            noresults: "No results were found.",
            maxheight: 250,
            cache: true,
            maxentries: 25,
            onAjaxError: null,
            setWidth: false,
            minWidth: 100,
            maxWidth: 200,
            useNotifier: true
        }, o);
        return this.each(function () {
            new $.autoComplete(this, o);
        });
    };

    $.autoComplete = function (e, o) {
        this.field = $(e);
        this.options = jQuery.extend(o, this.options);
        this.KEY_UP = 38;
        this.KEY_DOWN = 40;
        this.KEY_ESC = 27;
        this.KEY_RETURN = 13;
        this.KEY_TAB = 9;

        this.init();
    };

    $.autoComplete.prototype = {
        init: function () {
            var self = this;

            this.sInp = ""; 	// input value 
            this.nInpC = 0; // input value length
            this.aSug = []; 	// suggestions array 
            this.iHigh = 0; // level of list selection 

            if (this.options.useNotifier) this.field.addClass('ac_field');

            this.field.keypress(function (e) {
                if (!e) e = window.event;
                var key = e.keyCode || e.which;


                switch (key) {
                    case self.KEY_RETURN:
                        self.setHighlightedValue();
                        e.stopPropagation();
                        break;
                    case self.KEY_TAB:
                        self.setHighlightedValue();
                        break;
                    case self.KEY_ESC:
                        self.clearSuggestions();
                        break;
                }
                return true;
            });
            this.field.keyup(function (e) {

                if (!e) e = window.event;
                var key = e.keyCode || e.which;

                if (key == self.KEY_UP || key == self.KEY_DOWN) // KEY UP OR KEY DOWN
                {
                    if ($('#' + this.acID))
                        self.changeHighlight(key);
                }
                else {
                    self.getSuggestions(self.field.val());
                };

                return true;

            });
            this.field.blur(function () { self.resetTimeout(); return true; });
            this.field.attr('Autocomplete', 'off');
        },
        getSuggestions: function (val) {
            var self = this;

            if (val == this.sInp) return false;

            if ($('#' + this.acID)) $('#' + this.acID).remove();

            this.sInp = val;

            if (val.length < this.options.minchars) {
                this.aSug = [];
                this.nInpC = val.length;
                return false;
            }
            var ol = this.nInpC;
            this.nInpC = val.length ? val.length : 0;
            var l = this.aSug.length;
            /*if(this.options.cache && (this.nInpC > ol) && l && (l < this.options.maxentries))
            {
            alert('here');
            var arr = new Array();
            var oldval = '';
            $(this.aSug).each(function(i){
            if(oldval == this.value) return true;
            oldval = this.value;
            if(this.value.toLowerCase().indexOf(val.toLowerCase()) != -1)
            arr.push(this);
            });	
            this.aSug = arr;
            this.createList(this.aSug);
            }
            else 
            {*/
            clearTimeout(this.ajID);
            this.ajID = setTimeout(function () { self.doAjaxRequest(self.sInp) }, this.options.delay);
            //}
            document.helper = this;
            return false;
        },
        getLastInput: function (str) {
            var ret = str;
            if (undefined != this.options.valueSep) {
                var idx = ret.lastIndexOf(this.options.valueSep);
                ret = idx == -1 ? ret : ret.substring(idx + 1, ret.length);
            }
            return ret;
        },
        doAjaxRequest: function (input) {
            if ($.trim(input) == '') return false;

            var self = this;

            if (this.options.useNotifier) this.field.removeClass('ac_field').addClass('ac_field_busy');

            if (input != this.field.val())
                return false;
            this.sInp = this.getLastInput(this.sInp);

            if (typeof this.options.script == 'undefined')
                throw ('You have to specify a server script to make ajax calls!');
            else if (typeof this.options.script == 'function')
                var url = this.options.script(encodeURIComponent(this.sInp));
            else
                var url = this.options.script + this.options.varname + '=' + encodeURIComponent(this.sInp);

            if (!url) return false;

            var options = {
                url: url,
                type: self.options.meth,
                success: function (req) {
                    try {

                        if (self.options.useNotifier) {
                            self.field.removeClass('ac_field_busy').addClass('ac_field');

                        }

                        self.setSuggestions(req, input);
                    }
                    catch (e) {
                        //console.log(e);
                    }
                },
                error: (typeof self.options.onAjaxError == 'function') ? function (status) {
                    if (self.options.useNotifier) {
                        self.field.removeClass('ac_field_busy').addClass('ac_field');
                    }
                    self.options.onAjaxError(status);
                } : function (status) {
                    if (self.options.useNotifier) {
                        self.field.removeClass('ac_field_busy').addClass('ac_field');

                    }
                    //alert('AJAX error: '+status);
                }
            }
            $.ajax(options);
        },
        setSuggestions: function (req, input) {
            if (input != this.field.val())
                return false;
            if (this.options.json) {

                var jsondata = eval('(' + req + ')');
                this.aSug = jsondata.results;
            } else {
                var results = req.getElementsByTagName('results')[0].childNodes;
                this.aSug = [];
                for (var i = 0; i < results.length; i++) {
                    if (results[i].hasChildNodes())
                        this.aSug.push({ 'id': results[i].getAttribute('id'), 'value': results[i].childNodes[0].nodeValue, 'info': results[i].getAttribute('info') });
                }

            }
            this.acID = 'ac_' + this.field.attr('id');
            this.createList(this.aSug);
        },
        createList: function (arr) {
            var self = this;
            if ($('#' + this.acID)) $('#' + this.acID).remove();

            this.killTimeout();

            if (arr.length == 0 && !this.options.shownoresults) return false;

            var div = $('<div></div>').addClass(this.options.className).attr('id', this.acID);
            var hcorner = $('<div></div>').addClass('ac_corner');
            var hbar = $('<div></div>').addClass('ac_bar');
            var header = $('<div></div>').addClass('ac_header');
            header.append(hcorner).append(hbar);
            div.append(header);

            var ul = $('<ul></ul>').attr('id', 'ac_ul');


            var bookHeader = $('<span></span>').html("Search for  '" + this.sInp + "'");

            var a = $('<a></a>').attr('href', '/search/?q=' + this.sInp);

            a.append(bookHeader);

            var li = $('<li></li>').html(a);

            ul.append(li);


            for (var i = 0; i < arr.length; i++) {

                var val = arr[i].id;
                var st = val.toLowerCase().indexOf(this.sInp.toLowerCase());
                var output = val.substring(0, st) + '<em>' + val.substring(st, st + this.sInp.length) + '</em>' + val.substring(st + this.sInp.length);

                var span = $('<span></span>').html(output);
                span.addClass('nodeVal');

                /*if(this.info != '')
                {
                var br = $('<br/>');
                span.append(br);
                var small = $('<small></small>').html(arr[i].info);
                span.append(small);	
                }*/

                var a = $('<a></a>').attr('href', '/search/?q=' + val);
                a.attr('onmouseover', 'clearTimeout(this.ajID);');
                // USE THE FOLLOWING IF YOU WANT TO PUT TITLES TO ELEMENTS (YOU COULD USE THE SAME AS WE DID WITH INFO ABOVE)
                var tl = $('<span></span>').addClass('tl').html('&nbsp;');
                var tr = $('<span></span>').addClass('tr').html('&nbsp;');

                a.append(tl);
                a.append(tr);
                a.append(span).attr('rel', i);

                //a.click(function(e){self.setHighlightedValue(); return false;});
                //a.mouseover(function(e){self.setHighlight($(this).attr('rel'));});

                var li = $('<li></li>').html(a);
                ul.append(li);
            };

            div.append(ul);
            var fcorner = $('<div></div>').addClass('ac_corner');
            var fbar = $('<div></div>').addClass('ac_bar');
            var footer = $('<div></div>').addClass('ac_footer');
            footer.append(fcorner).append(fbar);
            div.append(footer);

            var pos = this.field.offset();

            var w =
		    (
		      this.options.setWidth && this.field.width() < this.options.minWidth
		    )
		    ? this.options.minWidth :
		    (
		      this.options.setWidth && this.field.width() > this.options.maxWidth
		    )
		    ? this.options.maxWidth :
		    this.field.width();

            //div.left(pos.left).top(pos.top + this.field.height()).width(w).mouseover(function(){self.killTimeout();}).mouseout(function(){self.resetTimeout();});

            div.css({ "position": "absolute",
                "zIndex": "5000", "left": (pos.left) + "px", "top": "75px"
            });

            $(document.body).append(div);
            this.setHighlight(0);
            this.toID = setTimeout(function () { self.clearSuggestions(); }, this.options.timeout);
        },
        changeHighlight: function (key) {
            var list = $('#ac_ul');

            if (!list) return false;

            var n = (key == this.KEY_TAB || key == this.KEY_DOWN) ? this.iHigh + 1 : this.iHigh - 1;

            n = (n >= list.children().length) ? list.children().length - 1 : ((n < 0) ? 0 : n);

            this.setHighlight(n);
        },
        setHighlight: function (n) {

            var list = $('#ac_ul');

            if (!list) return false;

            var valNum = 0;

            //valNum = Number(n) + 1;

            this.iHigh = Number(n);

            list.children().removeClass('ac_highlight').eq(this.iHigh).addClass('ac_highlight');

            this.killTimeout();
        },
        clearHighlight: function () {
            var list = $('#ac_ul');

            if (!list) return false;
            list.children().removeClass('ac_highlight');
            this.iHigh = 0;
        },
        setHighlightedValue: function () {

            if (this.iHigh >= 0) {
                if (!this.aSug[this.iHigh]) return;
                if (null != this.options.valueSep) {
                    var str = this.getLastInput(this.field.val());
                    var idx = this.field.val().lastIndexOf(str);
                    str = this.aSug[this.iHigh].value + this.options.valueSep;
                    this.sInp = idx == -1 ? str : this.field.val().substring(0, idx) + str;

                    var val = $('li[class="ac_highlight"] a span[class="nodeVal"]').html();

                    //val = val.replace("<em>", "");

                    //val = val.replace("</em>", "");
                    val = val.replace(/\<\/em\>/gi, "");

                    val = val.replace(/\<em\>/gi, "");

                    this.field.val(val);
                }
                else {
                    var str = this.getLastInput(this.field.val());
                    var idx = this.field.val().lastIndexOf(str);
                    str = this.aSug[this.iHigh].value;
                    this.sInp = idx == -1 ? str : this.field.val().substring(0, idx) + str;

                    var val = $('li[class="ac_highlight"] a span[class="nodeVal"]').html();

                    //val = val.replace("<em>", "");

                    //val = val.replace("</em>", "");
                    val = val.replace(/\<\/em\>/gi, "");

                    val = val.replace(/\<em\>/gi, "");

                    this.field.val(val);
                }
                this.field.focus();
                if (this.field.selectionStart) {
                    this.field.setSelectionRange(this.sInp.length, this.sInp.length);
                }
                this.clearSuggestions();
                if (typeof this.options.callback == 'function')
                    this.options.callback(this.aSug[this.iHigh]);
            }
        },
        killTimeout: function () {
            clearTimeout(this.toID);
        },
        resetTimeout: function () {
            this.killTimeout();
            var self = this;
            this.toID = setTimeout(function () { self.clearSuggestions() }, self.options.timeout);
        },
        clearSuggestions: function () {
            this.killTimeout();
            if ($('#' + this.acID)) {
                $('#' + this.acID).fadeOut('fast', function () { $(this).remove(); });
            }
        }

    }
})(jQuery);