var calcms = (function($) {
    // define this
    var my = {};

    // calcms base functions
    // event handlers are customized at herbstradio.org

    my.updateContainer = function updateContainer(id, url, onLoading, callback) {
        if (id == null)
            return;
        if ($("#" + id).length == 0)
            return;
        // if (onLoading)document.getElementById(id).innerHTML="lade ...";
        $("#" + id).load(url, null, callback);
    }

    my.load = function load(url) {
        window.location.href = url;
        // $(window).load(url);
        // $('html').load(url);
    }

    my.postContainer = function postContainer(url, parameters, callback) {
        if (url != '')
            $.post(url, parameters, callback);
    }

    // get calcms setting
    my.get = function get(name) {
        if (calcms_settings[name] == null)
            return '';
        return calcms_settings[name];
    }

    // set calcms setting
    my.set = function set(name, value) {
        calcms_settings[name] = value;
    }

    // get select box value
    my.selectValue = function selectValue(element) {
        value = element.options[element.selectedIndex].value;
        return value;
    }

    my.selectFirstOption = function selectFirstOption(id) {
        if ($(id) && $(id).length > 0)
            $(id)[0].selectedIndex = 0;
    }

    my.contains = function contains(s, t) {
        if (s == false)
            return false;
        if (t == false)
            return false;
        return s.indexOf(t) != -1;
    }

    my.getJsName = function getJsName(s) {
        s = s.replace(/[^a-zA-Z\_0-9]/g, '_');
        s = s.replace(/_+/g, '_');
        return s;
    }

    my.isArchive = function isArchive() {
        if ($('#calcms_archive:checked').length == 0)
            return 0;
        return 1;
    }

    my.getSearchElement = function getSearchElement() {
        return $("#calcms_search input[name='search']");
    }

    my.resetSearch = function resetSearch() {
        $("#calcms_search_field").val('');
    }

    // set calcms_settings to parameters from URL
    my.evaluateParametersFromUrl = function evaluateParametersFromUrl() {
        var location = new String(window.location);

        if (!location.match(my.get("base_url")))
            return;

        if (window.location.search != "") {
            var parameters = window.location.search.split("?")[1].split("&");
            for (var i = 0; i < parameters.length; i++) {
                var pair = parameters[i];
                var name_values = pair.split("=");
                if (name_values != null) {
                    // alert(name_values[0]+"="+name_values[1]);
                    // set(name_values[0],name_values[1]);
                    var element = document.getElementById(name_values[0]);
                    if (element != null)
                        element.value = name_values[1];
                }
            }
        }

        var sendung = /\/sendung\/(\d+)\//;
        sendung.exec(location);

        if (RegExp.$1 != null && RegExp.$1 != '') {
            // alert(RegExp.$1);
            set('event_id', RegExp.$1);
            set('last_event_id', my.get('event_id'));
        } else {

            var sendungen = /\/sendungen\/(\d{4}\-\d{2}\-\d{2})\/(\d{4}\-\d{2}\-\d{2})\/(\d)\//;
            sendungen.exec(location);
            if (RegExp.$1 != '' && RegExp.$2 != '' && RegExp.$3 != '') {
                set('from_date', RegExp.$1);
                set('till_date', RegExp.$2);
                set('weekday', RegExp.$3);
            } else {

                var sendungen = /\/sendungen\/(\d{4}\-\d{2}\-\d{2})\/(\d{4}\-\d{2}\-\d{2})\//;
                sendungen.exec(location);
                if (RegExp.$1 != '' && RegExp.$2 != '') {
                    set('from_date', RegExp.$1);
                    set('till_date', RegExp.$2);
                } else {
                    var sendungen = /\/sendungen\/(\d{4}\-\d{2}\-\d{2})\//;
                    sendungen.exec(location);
                    if (RegExp.$1 != '') {
                        set('date', RegExp.$1);
                    }
                }

            }

            var kalender = /\/kalender\/(\d{4}\-\d{2}\-\d{2})\/(\d{4}\-\d{2}\-\d{2})\//;
            kalender.exec(location);
            if (RegExp.$1 != '' && RegExp.$2 != '') {
                set('from_date', RegExp.$1);
                set('till_date', RegExp.$2);
            } else {
                var kalender = /\/kalender\/(\d{4}\-\d{2}\-\d{2})\//;
                kalender.exec(location);
                if (RegExp.$1 != '') {
                    set('date', RegExp.$1);
                }
            }
        }
    }

    // return URL from calcms_settings
    // parameters can be overwritten by field and value
    // This handles main controller interaction logics
    my.setAndGetUrlParameters = function setAndGetUrlParameters(field, value) {

        // overwrite fields by field and value
        if (field != null && value != null && field != '') {
            // alert(target+" "+field+" "+value);
            set(field, value);
        }

        // read fields
        var debug = my.get('debug');
        var from_date = my.get('from_date');
        var till_date = my.get('till_date');
        var date = my.get('date');
        var month = my.get('month');
        var weekday = my.get('weekday');
        var time_of_day = '';
        var time = '';
        var program = my.get('program');
        var series_name = my.get('series_name');
        var category = my.get('category');
        var tag = my.get('tag');
        var search_field = my.get('search');

        // delete filters by current action
        if ((field == 'search' && search_field != '')
                || (field == 'category' && category != '')
                || (field == 'series_name' && series_name != '')
                || (field == 'program' && program != '') || (field == 'tag')
                && tag != '') {
            weekday = '';
            date = '';
            from_date = '';
            till_date = '';
        }

        if (field == 'search') {
            category = '';
            series_name = '';
            program = '';
        }

        if (field == 'category') {
            search_field = '';
            series_name = '';
            program = '';
        }

        if (field == 'program') {
            search_field = '';
            series_name = '';
            category = '';
        }

        if (field == 'series_name') {
            search_field = '';
            program = '';
            category = '';
        }

        if (field == 'month') {
            if (month != '') {
                from_date = month;
                till_date = month.substring(0, month.length - 2) + "31";
            }
            weekday = '';
            date = '';
            category = '';
            program = '';
            series_name = '';
            tags = '';
            search_field = '';
        }

        if (field == 'week') {
            weekday = '';
            date = '';
            category = '';
            program = '';
            series_name = '';
            tags = '';
            search_field = '';
        }

        if (field == 'weekday') {
            /*
             * if (month != ''){ from_date=month;
             * till_date=month.substring(0,month.length-2)+"31" ; }
             */
            category = '';
            program = '';
            series_name = '';
            tags = '';
            search_field = '';
        }

        if (field == 'date') {
            weekday = '';
            from_date = '';
            till_date = '';
            category = '';
            program = '';
            series_name = '';
            tags = '';
            search_field = '';
        }

        if (field == 'time') {
            if (time == 'null') {
                return

                

                                

                

            } else {
                weekday = '';
                time_of_day = '';
            }
        }

        if (field == 'month' || field == 'week' || field == 'weekday'
                || field == 'time_of_day') {
            time = '';
        }

        // build target URL
        var url = '';

        if (field == 'month' || field == 'week') {
            if (from_date != '')
                url += '/' + from_date;
            if (till_date != '')
                url += '/' + till_date;
        } else if (weekday != '') {
            if (from_date != '')
                url += '/' + from_date;
            if (till_date != '')
                url += '/' + till_date;
            url += '/' + weekday;
        } else if (date != '') {
            if (date == 'today') {
                url += '/heute/';
            } else {
                url += '/' + date;
            }
        }

        if (search_field != '') {
            url += "/suche/" + search_field;
        }

        if (category != null && category != '') {
            url += "/kategorie/" + category;
        }

        if (series_name != null && series_name != '') {
            url += "/sendereihe/" + series_name;
        }

        if (url.substr(url.length - 1, url.length) != '/') {
            url += '/';
        }

        if (time_of_day != '') {
            url += "&time_of_day=" + time_of_day;
        } else if (time != '' && time != 'null') {
            url += "&" + time;
        }

        if (tag != null && tag != '') {
            url += "&tag=" + tag;
        }

        if (program != null && program != '') {
            url += "&program=" + program;
        }

        if (field == 'print') {
            url += "&print=1";
        }

        if (debug != '') {
            url += '&debug=' + debug;
        }

        return url;
    }

    // show current project categories
    my.showProjectCategories = function showProjectCategories(project) {
        var projectJsName = calcms.getJsName(project);
        $('#calcmsCategoryForm select').each(function() {
            var id = $(this).attr('id');
            if (id == "calcms_category_" + projectJsName) {
                if ($(this).css('display') == 'none')
                    $(this).show();
            } else {
                if ($(this).css('display') != 'none')
                    $(this).hide();
            }
        });
    }

    // show current series categories
    my.showProjectSeriesNames = function showProjectSeriesNames(project) {
        var projectJsName = calcms.getJsName(project);
        $('#calcmsSeriesNamesForm select').each(function() {
            var id = $(this).attr('id');
            if (id == "calcms_series_name_" + projectJsName) {
                if ($(this).css('display') == 'none')
                    $(this).show();
            } else {
                if ($(this).css('display') != 'none')
                    $(this).hide();
            }
        });
    }

    // get current project
    my.getProject = function getProject() {
        var project = $('#calcms_project');
        if (project.length == 0)
            return 'all';
        return project.val();
    }

    // remove projects from form without categories and series_names
    my.removeEmptyProjects = function removeEmptyProjects() {
        $('#calcms_project option').each(
                function() {
                    var project = $(this).val();
                    var hasCategories = $('#calcms_category_'
                            + calcms.getJsName(project)).length;
                    var hasSeries = $('#calcms_series_name_'
                            + calcms.getJsName(project)).length;
                    if ((hasCategories == 0) && (hasSeries == 0)) {
                        $(this).remove();
                    }
                });
    }

    my.clearOnChangeArchive = function clearOnChangeArchive() {
        $('#calcms_archive').off();
    }

    // register action on changing archive
    my.registerOnChangeArchive = function registerOnChangeArchive(action) {
        my.clearOnChangeArchive();
        $('#calcms_archive').on('click', action);
    }

    // show all events for a given project
    my.showSearchResultsByProject = function showSearchResultsByProject(
            project, value, archive) {
        if (value != null && value != '') {
            var url = my.get('search_url');
            if (project != '' && project != null)
                url += escape(project) + '/';
            else
                url += 'all/';
            if (value != '' && value != null)
                url += escape(value) + '/';
            if (archive != null && archive == 0)
                url += 'kommende/';
            if (archive != null && archive == 1)
                url += 'vergangene/';
            my.updateContainer('calcms_list', url, 1);
        }
    }

    // show all events for a given category
    my.showEventsByCategory = function showEventsByCategory(value) {
        if (value != '' && value != null) {
            my.updateContainer('calcms_list', my.get('search_category_url')
                    + escape(value) + '/', 1);
        }
    }

    // show all events for a given project and category
    my.showEventsByProjectAndCategory = function showEventsByProjectAndCategory(
            project, category, archive) {
        if (category != '' && category != null) {
            var url = my.get('search_category_url');
            if (project != '' && project != null)
                url += escape(project) + '/';
            if (category != '' && category != null)
                url += escape(category) + '/';
            if (archive != null && archive == 0)
                url += 'kommende/';
            if (archive != null && archive == 1)
                url += 'vergangene/';
            my.updateContainer('calcms_list', url, 1);
        }
    }

    // show all events for a given project and series
    my.showEventsByProjectAndSeriesName = function showEventsByProjectAndSeriesName(
            project, seriesName, archive) {
        if (seriesName != '' && seriesName != null) {
            var url = my.get('search_series_name_url');
            if (project != '' && project != null)
                url += escape(project) + '/';
            if (seriesName != '' && seriesName != null)
                url += escape(seriesName) + '/';
            if (archive != null && archive == 0)
                url += 'kommende/';
            if (archive != null && archive == 1)
                url += 'vergangene/';
            my.updateContainer('calcms_list', url, 1);
        }
    }

    // show all events for a given series
    my.showEventsBySeriesName = function showEventsBySeriesName(value) {
        if (value != '' && value != null) {
            my.updateContainer('calcms_list', my.get('search_series_name_url')
                    + escape(value) + '/', 1);
        }
    }

    // show all events for a given program
    my.showEventsByProgram = function showEventsByProgram(value) {
        var events_url = my.get('events_url');
        var url = my.setAndGetUrlParameters('program', value);
        if (value != '' && value != null) {
            // my.updateContainer('calcms_list', events_url+url, 1);
            my.updateContainer('calcms_list', url, 1);
        }
    }

    // show next event of a given series
    my.showNextSeriesEvent = function showNextSeriesEvent(value) {
        var events_url = my.get('next_series_url');
        my.load(events_url + '/' + value + '.html');
    }

    // show previous event of a given series
    my.showPrevSeriesEvent = function showPrevSeriesEvent(value) {
        var events_url = my.get('prev_series_url');
        my.load(events_url + '/' + value + '.html');
    }

    my.showMenuAndList = function showMenuAndList(target, field, value) {

        var events_url = my.get('events_url');
        var menu_url = my.get('menu_url');
        var event_id = my.get('event_id');

        var url = my.setAndGetUrlParameters(field, value);

        if (target == 'window') {
            window.location.href = events_url + url;
        } else {
            my.updateContainer('calcms_menu', menu_url + url, 1);

            if (event_id != '' && event_id != null && Number(event_id) != 'NaN') {
                // load list selected by url
                my.showEvents(event_id, '');
                my.set('event_id', '');
            } else {
                // load event list
                my.updateContainer('calcms_list', events_url + url, 1);
                my.set('last_list_url', events_url + url);
            }

        }
        return false;
    }

    // load given event details into list
    my.showEvents = function showEvents(event_id, view) {
        if (view == null || view == '')
            view = 'list_url';
        if (event_id != '') {
            var url = my.get(view) + '/' + event_id + '/';
            my.updateContainer('calcms_list', url, 1);
        } else {
            document.getElementById('calcms_list').innerHTML = 'keine Sendung gefunden...';
        }
    }

    // load given event details into list
    my.showEvent = function showEvent(event_id) {
        var old_url = my.get('last_list_url');
        var url = my.get('list_url') + '/' + event_id + '/';
        if (url != old_url) {
            my.set('last_event_id', event_id);
            my
                    .updateContainer(
                            'calcms_list',
                            url,
                            1,
                            function(responseText, textStatus, XMLHttpRequest) {
                                var back_link = '<a href="#" onclick="updateContainer(\'calcms_list\',\''
                                        + old_url
                                        + '\');return false;">zur&uuml;ck</a>';
                                document.getElementById('calcms_list').innerHTML = back_link
                                        + document
                                                .getElementById('calcms_list').innerHTML
                                        + '<p><hr/>' + back_link;
                            });
        }
    }

    // Calendar actions

    // update menu and list by given date
    my.showEventsByDate = function showEventsByDate(date) {
        // my.set('date',date);
        my.showMenuAndList('', 'date', date);
        return false;

    };

    // update menu and list by events from weekday at given date range
    my.showEventsByWeekday = function showEventsByWeekday(from, till, weekday) {
        my.set('from_date', from);
        my.set('till_date', till);
        my.set('weekday', weekday);
        my.showMenuAndList('', 'weekday');
        return false;

    };

    // update menu and list by events from given date range
    my.showEventsByDateRange = function showEventsByDateRange(from, till) {
        my.set('from_date', from);
        my.set('till_date', till);
        my.showMenuAndList('', 'week');
        return false;
    };

    // load calendar content
    my.showCalendar = function showCalendar(target, field) {
        var calendar_debug = my.get('calendar_debug');
        var calendar_url = my.get('calendar_url');
        var debug = my.get('debug');
        var date = my.get('month');

        var url = calendar_url;

        if (field == 'month') {
            url += '/' + date + '/';
        }
        if (debug != '') {
            url += '&debug=' + debug;
        }

        if (target == 'window') {
            window.location.href = events_url + url;
        } else {
            my.updateContainer('calcms_calendar', url);
        }

        if (calendar_debug != null) {
            calendar_debug.innerHTML = url;
        }
        return false;
    }

    // update menu, list and calendar widget by entries of given month YYYY-MM
    // (current day)
    my.showTodaysCalendarAndEvents = function showTodaysCalendarAndEvents(month) {
        my.set('month', month);
        // my.set(date,'today');
        my.showMenuAndList('', 'date', 'today');
        my.showCalendar('', 'month');
        return false;

    };

    // update menu, list and calendar widget by entries of given month YYYY-MM
    my.showCalendarAndEventsByMonth = function showCalendarAndEventsByMonth(
            month) {
        my.set('month', month);
        my.showMenuAndList('', 'month');
        my.showCalendar('', 'month');
        return false;

    };

    // update menu, list and calendar widget by entries of given date YYYY-MM-DD
    my.showCalendarAndEventsByDate = function showCalendarAndEventsByDate(date) {
        my.set('date', date);
        my.showMenuAndList('', 'date');

        my.set('month', date);
        my.showCalendar('', 'month');
        return false;

    };

    // end of Calendar actions

    // show comment for given event id and start time
    my.showCommentsByEventIdOrEventStart = function showCommentsByEventIdOrEventStart(
            event_id, event_start) {
        var url = my.get('comments_url') || '/agenda/kommentare/';
        if (event_id == '' || event_start == '' || url == '')
            return false;
        console.log("showCommentsByEventIdOrEventStart url="+url);

        my.set('comments_event_start', event_start);
        my.set('comments_event_id', event_id);

        url += event_id + '/' + event_start + '/';

        my.updateContainer('calcms_comments', url);
    }

    // add a comment to a event
    my.addComment = function addComment(id, comment) {
        var url = my.get('add_comment_url');
        if (url != '')
            $.post(url, $("#" + id).serialize(), function(data) {
                my.showCommentsByEventIdOrEventStart(my
                        .get('comments_event_id'), my
                        .get('comments_event_start'));

            });
        return false;
    }

    // insert new comment form
    my.showCommentForm = function showCommentForm(id, parent_id, event_id,
            event_start) {
        var response = '<div>';
        if (parent_id != '') response += 'Deine Anwort:';
        var html = response
        html += '<form id="add_comment_' + parent_id +'"'
        html += ' action="/agenda/kommentar_neu/?" method="post"'
        html += ' onsubmit="calcms.addComment(\'add_comment_'+parent_id+'\',this);return false;"'
        html += '>'
        html += 'Mit dem Absenden Ihres Kommentars erklären Sie sich mit der Veröffentlichung der Daten einverstanden.<br> ';
        html += 'Die Email-Addresse ist optional, dient privaten Antworten und wird nicht veröffentlicht.<br> '
        html += 'Details siehe <a href="/datenschutzerklaerung/">Datenschutzerklärung und Widerrufshinweise</a>.<br>'
        html += '<input name="author" maxlength="40" placeholder="Nickname"/><br />'
        html += '<textarea name="content" cols="60" rows="10"'
        html += ' onkeyup="javascript:if (this.value.length>1000) this.value=this.value.substr(0,1000)"'
        html += ' placeholder="Was ich sagen will, ist..."'
        html += ' ></textarea><br />'
        html += '<input name="email" maxlength="40" placeholder="Email-Addresse f&uuml;r R&uuml;ckmeldungen"/><br />'
        html += '<input type="submit" value="absenden!" style="color:#000"/>'
        html += '<input name="event_id"    value="' + event_id + '" type="hidden" />'
        html += '<input name="parent_id"    value="' + parent_id + '" type="hidden" />'
        html += '<input name="event_start" value="' + event_start + '" type="hidden" />'
        html += '</form>'
        html += '</div>';

        document.getElementById(id).innerHTML = html

        my.show(id);
    }
    // end of Comment actions

    // used to embed playlist in external pages
    my.showPlaylist = function showPlaylist() {
        var url = my.get('playlist_url');
        my.updateContainer('calcms_playlist', url);
    }

    // load comments into #calcms_newest_comments if not embedded yet
    my.showNewestComments = function showNewestComments() {
        if (my.get('preloaded') == '') {
            var url = my.get('newest_comments_url');
            my.updateContainer('calcms_newest_comments', url);
        }
        return false;
    }

    // export selected events to ical
    my.exportSelectedToICal = function exportSelectedToICal() {
        window.location = my.get('ical_url') + my.setAndGetUrlParameters();
        ;
        return false;
    }

    // init search interface: load search form content if not loaded yet
    my.initSearch = function initSearch(target, field) {
        if (my.get('preloaded') == '') {
            var category_url = my.get('category_url');
            var program_url = my.get('program_url');
            var series_name_url = my.get('series_name_url');
            var debug = my.get('debug');

            if (category_url != null && category_url != '')
                my.updateContainer('calcms_categories', category_url, 1);
            if (program_url != null && program_url != '')
                my.updateContainer('calcms_programs', program_url, 1);
            if (series_name_url != null && series_name_url != '')
                my.updateContainer('calcms_series_names', series_name_url, 1);
        }
        return false;
    }

    // wrapper to show an id
    my.show = function show(id) {
        $("#" + id).show("drop");
        document.getElementById(id).style.visibility = "visible";
        // document.getElementById(id).style.display="block";
    }

    // wrapper to hide an id
    my.hide = function hide(id) {
        $("#" + id).hide("drop");
        document.getElementById(id).style.visibility = "hidden";
        // document.getElementById(id).style.display="none";
    }

    // return max date
    my.setDateIfBefore = function setDateIfBefore(date1, date2) {
        if (date1 < date2)
            return date2;
        return date1;
    }

    // return min date
    my.setDateIfAfter = function setDateIfAfter(date1, date2) {
        if (date1 > date2)
            return date2;
        return date1;
    }

    // remove Drupal header for currently playing entry at topic overview page
    my.removeCurrentPlayingHeader = function removeCurrentPlayingHeader() {
        $("h2 a[href$='/testing']").each(function() {
            $(this).css("display", "none");
        });
    }

    // return instance
    return my;
}(jQuery));