// 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-7 + "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+16 + "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]);
        });

        var li = document.createElement("li");
        li.className = "indexsearchfirst";
        li.innerHTML = "<span><b>IHRE SUCHERGEBNISSE</b></span>";
        ul.appendChild(li);
        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");
            if (i == (num - 1)) {
                li.className = "indexsearchlast";
            }
            li.innerHTML = "<span>"+(i+1)+". "+formatItem(row, i, num)+"</span>";
            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 });
});