// Slightly modified jQuery plugin taken from http://www.dyve.net/jquery/?autocomplete

jQuery.indexedsearchAutocomplete = function(input, options) {
        // Create a link to self
        var me = this;

        // Create jQuery object for input element
        var $input = jQuery(input).attr("autocomplete", "off");;

        // Apply inputClass if necessary
        if (options.inputClass) $input.addClass(options.inputClass);

        // Create results
        var results = document.createElement("div");
        // Create jQuery object for results
        var $results = jQuery(results);
        // Set default values for results
        var pos = findPos(input);

        options.mustMatch = options.mustMatch || 0;

        $results.hide().addClass(options.resultsClass).css({
                position: "absolute",
                top: (pos.y + input.offsetHeight) + "px",
                left: pos.x + "px"
        });

        // Lets see if we can find it
        var readWidth = parseInt(jQuery("input[name='tx_indexedsearch[sword]']").get(0).clientWidth);
        if(readWidth > 0) {
                $results.css({
                                width: readWidth + "px"
                });
        }

        // Add to body element
        jQuery("body").append(results);

        input.autocompleter = me;
        input.lastSelected = $input.val();

        var timeout = null;
        var prev = "";
        var active = -1;
        var cache = {};
        var keyb = false;

        $input
        .keydown(function(e) {
                switch(e.keyCode) {
                        case 38: // up
                                e.preventDefault();
                                moveSelect(-1);
                                break;
                        case 40: // down
                                e.preventDefault();
                                moveSelect(1);
                                break;
                        case 9:  // tab
                        case 13: // return
                                if (selectCurrent()) {
                                        e.preventDefault();
                                }
                                break;
                        default:
                                active = -1;
                                if (timeout) clearTimeout(timeout);
                                timeout = setTimeout(onChange, options.delay);
                                break;
                }
        })
        .blur(function() {
                hideResults();
        });

        hideResultsNow();

        function onChange() {
                var v = $input.val();
                if (v == prev) return;
                prev = v;
                if (v.length >= options.minChars) {
                        $input.addClass(options.loadingClass);
                        requestData(v);
                } else {
                        $input.removeClass(options.loadingClass);
                        $results.hide();
                }
        };

         function moveSelect(step) {

                var lis = jQuery("li", results);
                if (!lis) return;

                active += step;

                if (active < 0) {
                        active = 0;
                } else if (active >= lis.size()) {
                        active = lis.size() - 1;
                }

                lis.removeClass("over");

                jQuery(lis[active]).addClass("over");

                // Weird behaviour in IE
                // if (lis[active] && lis[active].scrollIntoView) {
                //         lis[active].scrollIntoView(false);
                // }

        };

        function selectCurrent() {
                var li = jQuery("li.over", results)[0];
                if (!li) {
                        var $li = jQuery("li", results);
                        if (options.selectOnly) {
                                if ($li.length == 1) li = $li[0];
                        } else if (options.selectFirst) {
                                li = $li[0];
                        }
                }
                if (li) {
                        selectItem(li);
                        return true;
                } else {
                        return false;
                }
        };

        function selectItem(li) {
                if (!li) {
                        li = document.createElement("li");
                        li.extra = [];
                        li.selectValue = "";
                }
                var v = jQuery.trim(li.selectValue ? li.selectValue : li.innerHTML);
                input.lastSelected = v;
                prev = v;
                $results.html("");
                $input.val(v);
                hideResultsNow();
                setTimeout(function() { onItemSelect(li) }, 1);
        };

        function hideResults() {
                if (timeout) clearTimeout(timeout);
                timeout = setTimeout(hideResultsNow, 200);
        };

        function hideResultsNow() {
                if (timeout) clearTimeout(timeout);
                $input.removeClass(options.loadingClass);
                if ($results.is(":visible")) {
                        $results.hide();
                }
                if (options.mustMatch) {
                        var v = $input.val();
                        if (v != input.lastSelected) {
                                selectItem(null);
                        }
                }
        };

        function receiveData(q, data) {
                if (data) {
                        $input.removeClass(options.loadingClass);
                        results.innerHTML = "";
                        if (jQuery.browser.msie) {
                                // we put a styled iframe behind the calendar so HTML SELECT elements don't show through
                                $results.append(document.createElement('iframe'));
                        }
                        results.appendChild(dataToDom(data));
                        $results.show();
                } else {
                        hideResultsNow();
                }
        };

        function parseData(data) {
                if (!data) return null;
                var parsed = [];
                var rows = data.split(options.lineSeparator);
                for (var i=0; i < rows.length; i++) {
                        var row = jQuery.trim(rows[i]);
                        if (row) {
                                parsed[parsed.length] = row.split(options.cellSeparator);
                        }
                }
                return parsed;
        };

        function dataToDom(data) {
                var ul = document.createElement("ul");
                var num = data.length;

                data.sort(function(a,b) {
                        return parseInt(b[1]) - parseInt(a[1]);
                });

                for (var i=0; i < num; i++) {
                        var row = data[i];
                        if (!row) continue;

                        if (typeof cb_indexsearch_autocomplete !== 'undefined' && typeof cb_indexsearch_autocomplete.maxResults !== 'undefined')
                        {
                                if (i >= cb_indexsearch_autocomplete.maxResults)
                                {
                                        break;
                                }
                        }
                        var li = document.createElement("li");
                        li.innerHTML = formatItem(row, i, num);
                        li.selectValue = row[0];
                        var extra = null;
                        if (row.length > 1) {
                                extra = [];
                                for (var j=1; j < row.length; j++) {
                                        extra[extra.length] = row[j];
                                }
                        }
                        li.extra = extra;
                        ul.appendChild(li);
                        jQuery(li).hover(
                                function() { jQuery("li", ul).removeClass("over"); jQuery(this).addClass("over"); },
                                function() { jQuery(this).removeClass("over"); }
                        ).click(function(e) { e.preventDefault(); e.stopPropagation(); selectItem(this) });
                }
                return ul;
        };

        function requestData(q) {
                if (!options.matchCase) q = q.toLowerCase();
                var data = options.cacheLength ? loadFromCache(q) : null;
                if (data) {
                        receiveData(q, data);
                } else {
                        jQuery.get(makeUrl(q), function(data) {
                                data = parseData(data)
                                addToCache(q, data);
                                receiveData(q, data);
                        });
                }
        };

        function makeUrl(q) {
                var url = options.url + "&sw=" + q;
                for (var i in options.extraParams) {
                        url += "&" + i + "=" + options.extraParams[i];
                }
                return url;
        };

        function loadFromCache(q) {
                if (!q) return null;
                if (cache[q]) return cache[q];
                if (options.matchSubset) {
                        for (var i = q.length - 1; i >= options.minChars; i--) {
                                var qs = q.substr(0, i);
                                var c = cache[qs];
                                if (c) {
                                        var csub = [];
                                        for (var j = 0; j < c.length; j++) {
                                                var x = c[j];
                                                var x0 = x[0];
                                                if (matchSubset(x0, q)) {
                                                        csub[csub.length] = x;
                                                }
                                        }
                                        return csub;
                                }
                        }
                }
                return null;
        };

        function matchSubset(s, sub) {
                if (!options.matchCase) s = s.toLowerCase();
                var i = s.indexOf(sub);
                if (i == -1) return false;
                return i == 0 || options.matchContains;
        };

        this.flushCache = function() {
                cache = {};
        };

        this.setExtraParams = function(p) {
                options.extraParams = p;
        };

        function addToCache(q, data) {
                if (!data || !q || !options.cacheLength) return;
                if (!cache.length || cache.length > options.cacheLength) {
                        cache = {};
                        cache.length = 1; // we know we're adding something
                } else if (!cache[q]) {
                        cache.length++;
                }
                cache[q] = data;
        };

        function findPos(obj) {
                var curleft = obj.offsetLeft || 0;
                var curtop = obj.offsetTop || 0;
                while (obj = obj.offsetParent) {
                        curleft += obj.offsetLeft
                        curtop += obj.offsetTop
                }
                return {x:curleft,y:curtop};
        }

        function onItemSelect(li) {
                var thefield = $input;
                var theForm = thefield.parent();
                var i = 0;

                // Find the parent form, if not buried too deeply
                while(!theForm.is('FORM') && i < 20) {
                        theForm = theForm.parent();
                        i++;
                }

                if(theForm.is('FORM')) {
                        var doAutoSubmit = typeof cb_indexsearch_autocomplete !== 'undefined' && typeof cb_indexsearch_autocomplete.autoSubmit !== 'undefined' && cb_indexsearch_autocomplete.autoSubmit;
                        if (doAutoSubmit)
                        {
                                jQuery(theForm).get(0).submit();
                        }
                }
        }

        function formatItem(row) {
                var label = typeof cb_indexsearch_autocomplete !== 'undefined' && typeof cb_indexsearch_autocomplete.altResultsLabel !== 'undefined' ? cb_indexsearch_autocomplete.altResultsLabel : 'results';
                if(parseInt(row[1]) == 1) {
                        label = typeof cb_indexsearch_autocomplete !== 'undefined' && typeof cb_indexsearch_autocomplete.altResultLabel !== 'undefined' ? cb_indexsearch_autocomplete.altResultLabel : 'result';
                }
                return row[0] + " (" + row[1] + " " + label + ")";
        }
}

jQuery.fn.indexedsearchAutocomplete = function(url, options) {
        // Make sure options exists
        options = options || {};
        // Set url as option
        options.url = url;
        // Set default values for required options
        options.inputClass = options.inputClass || "ac_input";
        options.resultsClass = options.resultsClass || "ac_results";
        options.lineSeparator = options.lineSeparator || "\n";
        options.cellSeparator = options.cellSeparator || "|";
        options.minChars = options.minChars || 1;
        options.delay = options.delay || 400;
        options.matchCase = options.matchCase || 0;
        options.matchSubset = options.matchSubset || 1;
        options.matchContains = options.matchContains || 0;
        options.cacheLength = options.cacheLength || 1;
        options.mustMatch = options.mustMatch || 0;
        options.extraParams = options.extraParams || {};
        options.loadingClass = options.loadingClass || "ac_loading";
        options.selectFirst = options.selectFirst || false;
        options.selectOnly = options.selectOnly || false;

        this.each(function() {
                var input = this;
                new jQuery.indexedsearchAutocomplete(input, options);
        });

        // Don't break the chain
        return this;
}

jQuery(document).ready(function() {
        jQuery("input[name='tx_indexedsearch[sword]']").indexedsearchAutocomplete("http://" + top.location.host + top.location.pathname + "?eID=cb_indexedsearch_autocomplete&sr=" + sr + "&sh=" + sh + "", { minChars:3, matchSubset:1, matchContains:1, cacheLength:10, selectOnly:1 });
});