/*
*  Ajax Autocomplete for jQuery, version 1.1
*  (c) 2009 Tomas Kirda
*
*  Ajax Autocomplete for jQuery is freely distributable under the terms of an MIT-style license.
*  For details, see the web site: http://www.devbridge.com/projects/autocomplete/jquery/
*
*  Last Review: 09/27/2009
*/
(function ($) {
    var reEscape = new RegExp("(\\" + ["/", ".", "*", "+", "?", "|", "(", ")", "[", "]", "{", "}", "\\"].join("|\\") + ")", "gi");

    function fnFormatResult(value, data, currentValue) {
        var pattern = "(" + currentValue.replace(reEscape, "\\$1") + ")";
        return value.replace(new RegExp(pattern, "gi"), "<strong>$1</strong>");
    }
    function Autocomplete(el, options) {
        this.el = $(el);
        this.suggestions = [];
        this.data = [];
        this.badQueries = [];
        this.selectedIndex = -1;
        this.currentValue = this.el.val();
        this.intervalId = 0;
        this.cachedResponse = [];
        this.onChangeInterval = null;
        this.ignoreValueChange = false;
        this.serviceUrl = options.serviceUrl;
        this.isLocal = false;
        this.options = {
            autoSubmit: false,
            minChars: 1,
            maxHeight: 300,
            deferRequestBy: 0,
            width: 0,
            highlight: true,
            params: {},
            fnFormatResult: fnFormatResult,
            delimiter: null,
            zIndex: 9999
        };
        this.initialize();
        this.setOptions(options);
    }
    $.fn.autocomplete = function (options) {
        return new Autocomplete(this.get(0), options);
    };
    Autocomplete.prototype = {
        killerFn: null,
        initialize: function () {
            var me, uid, autocompleteElId;
            me = this;
            uid = new Date().getTime();
            autocompleteElId = "Autocomplete_" + uid;
            this.killerFn = function (e) {
                if ($(e.target).parents(".autocomplete").size() === 0) {
                    me.killSuggestions();
                    me.disableKillerFn();
                }
            };
            if (!this.options.width) {
                this.options.width = this.el.width();
            }
            this.mainContainerId = "AutocompleteContainter_" + uid;
            $('<div id="' + this.mainContainerId + '" style="position:absolute;z-index:9999;" class="autoSuggestElem"><div class="autocomplete-w1"><div class="autocomplete" id="' + autocompleteElId + '" style="display:none; width:300px;"></div></div></div>').appendTo("body");
            this.container = $("#" + autocompleteElId);
            this.fixPosition();
            if (window.opera) {
                this.el.keypress(function (e) {
                    me.onKeyPress(e);
                });
            } else {
                this.el.keydown(function (e) {
                    me.onKeyPress(e);
                });
            }
            this.el.keyup(function (e) {
                me.onKeyUp(e);
            });
            this.el.blur(function () {
                me.enableKillerFn();
            });
            this.el.focus(function () {
                me.fixPosition();
            });
        },
        setOptions: function (options) {
            var o = this.options;
            $.extend(o, options);
            if (o.lookup) {
                this.isLocal = true;
                if ($.isArray(o.lookup)) {
                    o.lookup = {
                        suggestions: o.lookup,
                        data: []
                    };
                }
            }
            $("#" + this.mainContainerId).css({
                zIndex: o.zIndex
            });
            this.container.css({
                maxHeight: o.maxHeight + "px",
                width: o.width
            });
        },
        clearCache: function () {
            this.cachedResponse = [];
            this.badQueries = [];
        },
        disable: function () {
            this.disabled = true;
        },
        enable: function () {
            this.disabled = false;
        },
        fixPosition: function () {
            var offset = this.el.offset();
            $("#" + this.mainContainerId).css({
                top: (offset.top + this.el.innerHeight()) + "px",
                left: offset.left + "px"
            });
        },
        enableKillerFn: function () {
            var me = this;
            $(document).bind("click", me.killerFn);
        },
        disableKillerFn: function () {
            var me = this;
            $(document).unbind("click", me.killerFn);
        },
        killSuggestions: function () {
            var me = this;
            this.stopKillSuggestions();
            this.intervalId = window.setInterval(function () {
                me.hide();
                me.stopKillSuggestions();
            }, 300);
        },
        stopKillSuggestions: function () {
            window.clearInterval(this.intervalId);
        },
        onKeyPress: function (e) {
            if (this.disabled || !this.enabled) {
                return;
            }
            switch (e.keyCode) {
            case 27:
                this.el.val(this.currentValue);
                this.hide();
                break;
            case 9:
            case 13:
                if (this.selectedIndex === -1) {
                    this.hide();
                    return;
                }
                this.select(this.selectedIndex);
                if (e.keyCode === 9) {
                    return;
                }
                break;
            case 38:
                this.moveUp();
                break;
            case 40:
                this.moveDown();
                break;
            default:
                return;
            }
            e.stopImmediatePropagation();
            e.preventDefault();
        },
        onKeyUp: function (e) {
            if (this.disabled) {
                return;
            }
            switch (e.keyCode) {
            case 38:
            case 40:
                return;
            }
            clearInterval(this.onChangeInterval);
            if (this.currentValue !== this.el.val()) {
                if (this.options.deferRequestBy > 0) {
                    var me = this;
                    this.onChangeInterval = setInterval(function () {
                        me.onValueChange();
                    }, this.options.deferRequestBy);
                } else {
                    this.onValueChange();
                }
            }
        },
        onValueChange: function () {
            clearInterval(this.onChangeInterval);
            this.currentValue = this.el.val();
            var q = this.getQuery(this.currentValue).toLowerCase();
            this.selectedIndex = -1;
            if (this.ignoreValueChange) {
                this.ignoreValueChange = false;
                return;
            }
            if (q === "" || q.length < this.options.minChars) {
                this.hide();
            } else {
                this.getSuggestions(q);
            }
        },
        getQuery: function (val) {
            var d, arr;
            d = this.options.delimiter;
            if (!d) {
                return $.trim(val);
            }
            arr = val.split(d);
            return $.trim(arr[arr.length - 1]);
        },
        getSuggestionsLocal: function (q) {
            var ret, arr, len, val, i;
            arr = this.options.lookup;
            len = arr.suggestions.length;
            ret = {
                suggestions: [],
                data: []
            };
            q = q.toLowerCase();
            for (i = 0; i < len; i++) {
                val = arr.suggestions[i];
                if (val.toLowerCase().indexOf(q) === 0) {
                    ret.suggestions.push(val);
                    ret.data.push(arr.data[i]);
                }
            }
            return ret;
        },
        getSuggestions: function (q) {
            var cr, me;
            cr = this.isLocal ? this.getSuggestionsLocal(q) : this.cachedResponse[q];
            if (cr && $.isArray(cr.suggestions)) {
                this.suggestions = cr.suggestions;
                this.data = cr.data;
                this.suggest();
            } else {
                if (!this.isBadQuery(q)) {
                    me = this;
                    me.options.params.query = q;
                    $.get(this.serviceUrl, me.options.params, function (txt) {
                        me.processResponse(txt);
                    }, "text");
                }
            }
        },
        isBadQuery: function (q) {
            var i = this.badQueries.length;
            while (i--) {
                if (q.indexOf(this.badQueries[i]) === 0) {
                    return true;
                }
            }
            return false;
        },
        hide: function () {
            this.enabled = false;
            this.selectedIndex = -1;
            this.container.hide();
        },
        suggest: function () {
            if (this.suggestions.length === 0) {
                this.hide();
                return;
            }
            var me, len, div, f, v, i, s, mOver, mClick;
            me = this;
            len = this.suggestions.length;
            f = this.options.fnFormatResult;
            v = this.getQuery(this.currentValue);
            mOver = function (xi) {
                return function () {
                    me.activate(xi);
                };
            };
            mClick = function (xi) {
                return function () {
                    me.select(xi);
                };
            };
            this.container.hide().empty();
            for (i = 0; i < len; i++) {
                s = this.suggestions[i];
                div = $((me.selectedIndex === i ? '<div class="selected"' : "<div") + ' title="' + s + '">' + f(s, this.data[i], v) + "</div>");
                div.mouseover(mOver(i));
                div.click(mClick(i));
                this.container.append(div);
            }
            this.enabled = true;
            this.container.show();
        },
        processResponse: function (text) {
            var response;
            try {
                response = eval("(" + text + ")");
            } catch (err) {
                return;
            }
            if (!$.isArray(response.data)) {
                response.data = [];
            }
            this.cachedResponse[response.query] = response;
            if (response.suggestions.length === 0) {
                this.badQueries.push(response.query);
            }
            //if (response.query === this.getQuery(this.currentValue)) {
                this.suggestions = response.suggestions;
                this.data = response.data;
                this.suggest();
            //}
        },
        activate: function (index) {
            var divs, activeItem;
            divs = this.container.children();
            if (this.selectedIndex !== -1 && divs.length > this.selectedIndex) {
                $(divs.get(this.selectedIndex)).attr("class", "");
            }
            this.selectedIndex = index;
            if (this.selectedIndex !== -1 && divs.length > this.selectedIndex) {
                activeItem = divs.get(this.selectedIndex);
                $(activeItem).attr("class", "selected");
            }
            return activeItem;
        },
        deactivate: function (div, index) {
            div.className = "";
            if (this.selectedIndex === index) {
                this.selectedIndex = -1;
            }
        },
        select: function (i) {
            var selectedValue, f;
            selectedValue = this.suggestions[i];
            if (selectedValue) {
                this.el.val(selectedValue);
                if (this.options.autoSubmit) {
                    f = this.el.parents("form");
                    if (f.length > 0) {
                        f.get(0).submit();
                    }
                }
                this.ignoreValueChange = true;
                this.hide();
                this.onSelect(i);
            }
        },
        moveUp: function () {
            if (this.selectedIndex === -1) {
                return;
            }
            if (this.selectedIndex === 0) {
                this.container.children().get(0).className = "";
                this.selectedIndex = -1;
                this.el.val(this.currentValue);
                return;
            }
            this.adjustScroll(this.selectedIndex - 1);
        },
        moveDown: function () {
            if (this.selectedIndex === (this.suggestions.length - 1)) {
                return;
            }
            this.adjustScroll(this.selectedIndex + 1);
        },
        adjustScroll: function (i) {
            var activeItem, offsetTop, upperBound, lowerBound;
            activeItem = this.activate(i);
            offsetTop = activeItem.offsetTop;
            upperBound = this.container.scrollTop();
            lowerBound = upperBound + this.options.maxHeight - 25;
            if (offsetTop < upperBound) {
                this.container.scrollTop(offsetTop);
            } else {
                if (offsetTop > lowerBound) {
                    this.container.scrollTop(offsetTop - this.options.maxHeight + 25);
                }
            }
        },
        onSelect: function (i) {
            var me, onSelect, getValue, s, d;
            me = this;
            onSelect = me.options.onSelect;
            getValue = function (value) {
                var del, currVal, arr;
                del = me.options.delimiter;
                if (!del) {
                    return value;
                }
                currVal = me.currentValue;
                arr = currVal.split(del);
                if (arr.length === 1) {
                    return value;
                }
                return currVal.substr(0, currVal.length - arr[arr.length - 1].length) + value;
            };
            s = me.suggestions[i];
            d = me.data[i];
            me.el.val(getValue(s));
            if ($.isFunction(onSelect)) {
                onSelect(s, d);
            }
        }
    };
}(jQuery));