jQuery.fn.highlight = function(pat) {
    function innerHighlight(node, pat) {
        var skip = 0;
        if (node.nodeType == 3) {
            var pos = node.data.toUpperCase().indexOf(pat);
            if (pos >= 0) {
                var spannode = document.createElement('span');
                spannode.className = 'search-highlight';
                var middlebit = node.splitText(pos);
                var endbit = middlebit.splitText(pat.length);
                var middleclone = middlebit.cloneNode(true);
                spannode.appendChild(middleclone);
                middlebit.parentNode.replaceChild(spannode, middlebit);
                skip = 1;
            }
        }
        else if (node.nodeType == 1 && node.childNodes && !/(script|style)/i.test(node.tagName)) {
            for (var i = 0; i < node.childNodes.length; ++i) {
                i += innerHighlight(node.childNodes[i], pat);
            }
        }
        return skip;
    }
    return this.each(function() {
        innerHighlight(this, pat.toUpperCase());
    });
};

jQuery.fn.addAutocompleteBehaviour = function(area) {
    return this.each(function() {
        $(this).autocomplete({
            source: function(request, response) {
                $.ajax({
                    url: "/banka/portlets/adv_search/autocomplete.jsp?area=" + area,
                    data: request,
                    dataType: "json",
                    success: function(data) {
                        response(data);
                    },
                    error: function() {
                        response([]);
                    }
                });
            },
            minLength: 2
        })
    });
}

$(document).ready(function () {

    var contentPathPrefix = "/banka/content/inet/";
    var contentSelector = "div.document-content,div.clanek";
    var searchQueryPrefixes = ["basicSearchText=", "%7BactionForm.searchText%7D="];

    var parsePath = function(pathPrefix) {
        if (location.pathname.indexOf(pathPrefix) == 0) {
            var docPath = location.pathname.substring(pathPrefix.length);
            var docIdStr = docPath.split("/", 3);
            return {
                objectName: docIdStr[2],
                langCode: docIdStr[1],
                portal: docIdStr[0]
            }
        } else {
            return false;
        }
    }

    var getSearchQuery = function(referrer, queryPrefix) {
        var startPos = referrer.indexOf(queryPrefix);
        if ((startPos < 0) || (startPos + queryPrefix.length == referrer.length)) {
            return false;
        }
        var endPos = referrer.indexOf("&", startPos);
        if (endPos < 0) {
            endPos = referrer.length;
        }
        return referrer.substring(startPos + queryPrefix.length, endPos);
    }

    var docID = parsePath(contentPathPrefix);
    if (! docID) {
        return false;
    }

    var referrer = document.referrer;
    if (! referrer) {
        return false;
    }

    var searchQuery;
    for (var i in searchQueryPrefixes) {
        searchQuery = getSearchQuery(referrer, searchQueryPrefixes[i]);
        if (searchQuery) {
            break;
        }
    }
    if (! searchQuery) {
        return false;
    }

    $.ajax({
        url: "/banka/portlets/adv_search/highlighter.jsp",
        data: "searchQuery=" + searchQuery + "&docON=" + docID.objectName + "&docLang=" + docID.langCode + "&docPortal=" + docID.portal,
        dataType: "json",
        success: function(highlightTerms) {
            $.each(highlightTerms, function(i, hlTerm) {
                $(contentSelector).highlight(hlTerm);
            });
        }
    });
});