import { $gettext } from "./gettext";
import eventBus from "./event-bus.ts";

eventBus.on('studip:set-locale', () => {
    Forum.warning_text = $gettext('Wenn Sie die Seite verlassen, gehen ihre Änderungen verloren!');
});

const Forum = {
    confirmDialog: null,
    current_area_id: null,
    current_category_id: null,
    seminar_id: null,
    warning_text: 'Wenn Sie die Seite verlassen, gehen ihre Änderungen verloren!',
    clipboard: {},

    getTemplate: _.memoize(function(name) {
            return _.template(jQuery("script." + name).html());
    }),

    init: function () {
        jQuery('html').addClass('forum');

        // make categories and areas sortable
        jQuery('#sortable_areas').sortable({
            axis: 'y',
            items: ">*.movable",
            handle: 'caption',
            stop: function () {
                var categories = {};
                categories.categories = {};
                jQuery(this).find('table').each(function () {
                    var name = jQuery(this).data('category-id');
                    categories.categories[name] = name;
                });

                jQuery.ajax({
                    type: 'POST',
                    url: STUDIP.URLHelper.getURL('dispatch.php/course/forum/index/savecats?cid=' + STUDIP.Forum.seminar_id),
                    data: categories
                });
            }
        });

        jQuery('tbody.sortable').sortable({
            axis: 'y',
            items: ">*:not(.sort-disabled)",
            connectWith: 'tbody.sortable',
            handle: '.drag-handle',
            helper: function (e, ui) {
                ui.children().each(function () {
                    jQuery(this).width(jQuery(this).width());
                });
                return ui;
            },

            stop: function () {
                STUDIP.Forum.saveAreaOrder();
            }
        });

        STUDIP.Forum.confirmDialog = STUDIP.Forum.getTemplate('confirm_dialog');

        STUDIP.Forum.attachEventHandlers();
    },

    approveDelete: function () {
        if (STUDIP.Forum.current_area_id) {
            // hide the area in the dom
            jQuery('tr[data-area-id=' + STUDIP.Forum.current_area_id + ']').remove();
            STUDIP.Forum.closeDialog();

            // ajax call to make the deletion permanent
            jQuery.ajax(STUDIP.URLHelper.getURL('dispatch.php/course/forum/index/delete_entry/'
                + STUDIP.Forum.current_area_id + '?cid=' + STUDIP.Forum.seminar_id), {
                method: 'post',
                data: {'security_token' : STUDIP.CSRF_TOKEN.value},
                success: function (html) {
                    jQuery('#message_area').html(html);
                }
            });

            STUDIP.Forum.current_area_id = null;
        }

        if (STUDIP.Forum.current_category_id) {
            // hide the table in the dom
            jQuery('table[data-category-id=' + STUDIP.Forum.current_category_id + ']').fadeOut();
            STUDIP.Forum.closeDialog();

            // move all areas to the default category
            jQuery('table[data-category-id=' + STUDIP.Forum.current_category_id + '] tr.movable').each(function () {
                jQuery('table[data-category-id=' + STUDIP.Forum.seminar_id + ']').append(jQuery(this));
            });

            // ajax call to make the deletion permanent
            jQuery.ajax(STUDIP.URLHelper.getURL('dispatch.php/course/forum/index/remove_category/'
                + STUDIP.Forum.current_category_id + '?cid=' + STUDIP.Forum.seminar_id), {
                method: 'post',
                data: {'security_token' : STUDIP.CSRF_TOKEN.value},
                success: function (html) {
                    jQuery('#message_area').html(html);
                }
            });

            STUDIP.Forum.current_category_id = null;
        }
    },

    deleteCategory: function (category_id) {
        STUDIP.Forum.showDialog($gettext('Sind sie sicher, dass Sie diese Kategorie entfernen möchten? ')
            + $gettext('Alle Bereiche werden dann nach "Allgemein" verschoben!'),
            'javascript:STUDIP.Forum.approveDelete()',
            'table[data-category-id=' + category_id +'] td.areaentry');

        STUDIP.Forum.current_category_id = category_id;
    },

    editCategoryName: function (category_id) {
        var template = STUDIP.Forum.getTemplate('edit_category');

        jQuery('table[data-category-id=' + category_id + '] span.category_name').hide()
            .parent().append(template({
                category_id : category_id,
                name : jQuery('table[data-category-id=' + category_id + '] span.category_name').text().trim()
            }));
        // jQuery('table[data-category-id=' + category_id + '] span.heading_edit').show();
    },

    cancelEditCategoryName: function (category_id) {
        jQuery('table[data-category-id=' + category_id + '] span.edit_category').remove();
        jQuery('table[data-category-id=' + category_id + '] span.category_name').show();

        // reset the input field with the unchanged name
        jQuery('table[data-category-id=' + category_id + '] span.heading_edit input[type=text]').val(
            jQuery('table[data-category-id=' + category_id + '] span.category_name').text().trim()
        );
    },

    saveCategoryName: function (category_id) {
        var name = {};
        name.name = jQuery('table[data-category-id=' + category_id + '] span.edit_category input[type=text]').val();

        if (!jQuery.trim(name.name).length) {
            jQuery('table[data-category-id=' + category_id + '] span.edit_category input[type=text]').val('');
            return;
        }

        // display the new name immediately
        jQuery('table[data-category-id=' + category_id + '] span.category_name').text(name.name);

        jQuery('table[data-category-id=' + category_id + '] span.edit_category').remove();
        jQuery('table[data-category-id=' + category_id + '] span.category_name').show();

        jQuery.ajax(STUDIP.URLHelper.getURL('dispatch.php/course/forum/index/edit_category/' + category_id + '?cid=' + STUDIP.Forum.seminar_id), {
            type: 'POST',
            data: name
        });
    },

    saveAreaOrder: function() {
        // iterate over each category and get the areas there
        var areas = {};
        areas.areas = {};
        jQuery('#sortable_areas').find('table').each(function () {
            var category_id = jQuery(this).data('category-id');

            areas.areas[category_id] = {};

            jQuery(this).find('tr').each(function () {
                var area_id = jQuery(this).data('area-id');
                areas.areas[category_id][area_id] = area_id;
            });
        });

        jQuery.ajax({
            type: 'POST',
            url: STUDIP.URLHelper.getURL('dispatch.php/course/forum/area/save_order?cid=' + STUDIP.Forum.seminar_id),
            data: areas
        });
    },

    deleteArea: function (element, area_id) {
        STUDIP.Forum.showDialog($gettext('Sind sie sicher, dass Sie diesen Bereich löschen möchten? ')
            + $gettext('Es werden auch alle Beiträge in diesem Bereich gelöscht!'),
            'javascript:STUDIP.Forum.approveDelete()',
            'tr[data-area-id=' + area_id +'] td.areaentry');

        STUDIP.Forum.current_area_id = area_id;
    },

    addArea: function (category_id) {
        var template = STUDIP.Forum.getTemplate('add_area');

        this.cancelAddArea();

        jQuery('table[data-category-id=' + category_id + '] tr.add_area').hide();

        $(template({
            category_id : category_id,
        })).appendTo('table[data-category-id=' + category_id + ']');

        // #FIXME: there should be a better way to initialize a single form
        STUDIP.Forms.initialize();
    },

    doAddArea: function() {
        // store the area only if the validity check has passed
        var values = $(this).serializeObject();

        // disable submit and cancel buttons, there is no turning back now
        $('.button', this).prop('disabled', true);

        jQuery.ajax(STUDIP.URLHelper.getURL('dispatch.php/course/forum/area/add/' + values.category_id + '?cid=' + STUDIP.Forum.seminar_id), {
            type: 'POST',
            data: values,
            success: function(data) {
                // remove the add-form and enable the addition of another area
                $('table[data-category-id=' + values.category_id +'] tr.new_area').remove();
                $('table[data-category-id=' + values.category_id +'] tr.add_area').show();

                // insert the new area at the end of the list (more precisely: add the exact position where the add-form has been)
                $(data).appendTo('table[data-category-id=' + values.category_id + ']');

                STUDIP.Forum.saveAreaOrder();
            }
        });

        return false;
    },

    cancelAddArea: function () {
        jQuery('tr.new_area').remove();
        jQuery('tr.add_area').show();
    },

    editArea: function (area_id) {

        var template = STUDIP.Forum.getTemplate('edit_area');

        // disable iconbar
        STUDIP.ActionMenu.closeAll();
        jQuery('tr[data-area-id=' + area_id + '] .action-menu').hide();

        // show edit form
        jQuery('tr[data-area-id=' + area_id + '] span.areadata').hide()
            .parent().append(template({
                area_id : area_id,
                name : jQuery('tr[data-area-id=' + area_id + '] span.areaname').text().trim(),
                content : jQuery('tr[data-area-id=' + area_id + '] div.areacontent').data('content')
            }));
    },

    cancelEditArea: function (area_id) {
        jQuery('tr[data-area-id=' + area_id + '] span.edit_area').remove();
        jQuery('tr[data-area-id=' + area_id + '] span.areadata').show();

        // enable iconbar
        jQuery('tr[data-area-id=' + area_id + '] .action-menu').show();
    },

    saveArea: function (area_id) {
        var name = {};
        name.name = jQuery('tr[data-area-id=' + area_id + '] span.edit_area input[type=text]').val();
        name.content = jQuery('tr[data-area-id=' + area_id + '] span.edit_area textarea').val();

        // display the new name immediately
        jQuery('tr[data-area-id=' + area_id + '] span.areaname').text(name.name);

        // store the modified raw-content used for possible subsequent edits
        jQuery('tr[data-area-id=' + area_id + '] div.areacontent').data('content', name.content);

        // store the modified area and get formatted content-text from server
        jQuery.ajax(STUDIP.URLHelper.getURL('dispatch.php/course/forum/area/edit/' + area_id + '?cid=' + STUDIP.Forum.seminar_id), {
            type: 'POST',
            data: name,
            success: function(data)  {
                // shorten the description to 150 chars max
                if (data.content.length > 150) {
                    jQuery('tr[data-area-id=' + area_id + '] div.areacontent').text(data.content.substr(0, 150)).append('…');
                } else {
                    jQuery('tr[data-area-id=' + area_id + '] div.areacontent').text(data.content);
                }

                jQuery('tr[data-area-id=' + area_id + '] span.areaname_edit').hide();
                jQuery('tr[data-area-id=' + area_id + '] span.areaname').parent().parent().show();

                // remove edit form
                jQuery('tr[data-area-id=' + area_id + '] span.edit_area').remove();

                // enable iconbar
                jQuery('tr[data-area-id=' + area_id + '] .action-icons').show();
            }
        });

    },

    saveEntry: function(topic_id) {
        var $ = jQuery;

        var spanSelector = 'span[data-edit-topic=' + topic_id +']';

        var name = $(spanSelector + ' input[name=name]');
        name.data('reset', name.val());

        var textarea = $(spanSelector + ' textarea[name=content]');

        // make sure HTML stays HTML
        // usually the wysiwyg editor does this automatically,
        // but since there is no submit event the editor does not
        // get notified
        textarea.val(STUDIP.wysiwyg.markAsHtml(textarea.val()));

        // remember current textarea value
        textarea.data('reset', textarea.val());

        jQuery.ajax(STUDIP.URLHelper.getURL('dispatch.php/course/forum/index/update_entry/' + topic_id + '?cid=' + STUDIP.Forum.seminar_id), {
            type: 'POST',
            data: jQuery('form[data-topicid='+ topic_id +']').serializeObject(),

            error: function(data) {
                alert('Server meldet: ' + data.statusText);
            },

            success: function (data) {
                var json = jQuery.parseJSON(data);
                // set the new name and content
                jQuery('span[data-topic-name=' + topic_id +']').html(json.name);
                jQuery('span[data-topic-content=' + topic_id +']').html(json.content);
                STUDIP.Markup.element('span[data-topic-content=' + topic_id +']');

                // hide the other stuff
                jQuery('span[data-edit-topic=' + topic_id +']').hide();
                jQuery('span[data-show-topic=' + topic_id +']').show();

            }
        });
    },

    editEntry: function (topic_id) {
        jQuery('span[data-edit-topic]').hide();
        jQuery('span[data-show-topic]').show();

        jQuery('span[data-show-topic=' + topic_id +']').hide();
        jQuery('span[data-edit-topic=' + topic_id +']').show().find('textarea').focus();
    },

    cancelEditEntry: function (topic_id) {
        jQuery('span[data-edit-topic=' + topic_id +'] input[name=name]').val(
            jQuery('span[data-edit-topic=' + topic_id +'] input[name=name]').data('reset')
        );

        jQuery('span[data-edit-topic=' + topic_id +'] textarea[name=content]').val(
            jQuery('span[data-edit-topic=' + topic_id +'] textarea[name=content]').data('reset')
        );

        jQuery('span[data-edit-topic=' + topic_id +']').hide();
        jQuery('span[data-show-topic=' + topic_id +']').show();
    },

    newEntry: function() {
        jQuery('#new_entry_button').hide();

        jQuery('body').animate({scrollTop: jQuery('div.forum_new_entry').offset().top - 40}, 'slow');
        jQuery('html').animate({scrollTop: jQuery('div.forum_new_entry').offset().top - 40}, 'slow');
    },

    cancelNewEntry: function(callback) {
        $(window).off('beforeunload');

        if ($('div.forum_new_entry').length) {
            STUDIP.Dialog.confirm(
                $gettext('Sind sie sicher, dass Sie ihren bisherigen Beitrag verwerfen wollen?'),
                function() {
                    $('div.forum_new_entry').remove();
                    callback();
                },
                function() {}
            );
        } else {
            callback();
        }

        jQuery('#new_entry_button').show();

        return false;
    },

    answerEntry: function() {
        $(window).on('beforeunload', function() {
            return STUDIP.Forum.warning_text;
        });

        if (!$('div[data-id=global]').length) {
            STUDIP.Forum.cancelNewEntry(function() {
                var tmpl = STUDIP.Forum.getTemplate('new_entry_box');
                jQuery('#new_entry_button').parent().append(tmpl({
                    topic_id: 'global'
                }));

                STUDIP.Forum.newEntry();
            });
        }
    },

    citeEntry: function(topic_id) {
        $(window).on('beforeunload', function() {
            return STUDIP.Forum.warning_text;
        });

        /* Only recreate input-form, if it is different than the current one */
        if (!$('div[data-id=' + topic_id + ']').length) {
            STUDIP.Forum.cancelNewEntry(function() {
                var tmpl = STUDIP.Forum.getTemplate('new_entry_box');
                $('#forumposting_'+ topic_id).parent().append(tmpl({
                    topic_id: topic_id
                }));

                // watch out for anonymous postings
                var anonymous = jQuery('.anonymous_post[data-profile=' + topic_id + ']').length > 0;

                var name = anonymous
                    ? $gettext('Anonym')
                    : jQuery('span.username[data-profile=' + topic_id + ']').text().trim();

                // add content from cited posting in [quote]-tags
                var originalContent = jQuery(
                    'span[data-edit-topic=' + topic_id +'] textarea[name=content]'
                ).val();

                var content = STUDIP.Forum.quote(originalContent, name);

                var box = jQuery('div.forum_new_entry[data-id=' + topic_id + ']');
                $(box).find('textarea').val(content);
                $(box).insertAfter('form[data-topicid=' + topic_id + ']');
                $(box).addClass('cite_box');

                $(box).find('input[type=hidden][name=parent]').val(topic_id);

                STUDIP.Forum.newEntry();
            });
        }
    },

    quote: function(text, name) {
        // If quoting is changed update these functions:
        // - StudipFormat::markupQuote
        //   lib/classes/StudipFormat.php
        // - quotes_encode lib/visual.inc.php
        // - STUDIP.Forum.citeEntry > quote
        //   public/plugins_packages/core/Forum/javascript/forum.js
        // - studipQuotePlugin > insertStudipQuote
        //   public/assets/javascripts/ckeditor/plugins/studip-quote/plugin.js

        var author = '';
        if (name) {
            var writtenBy = $gettext('%s hat geschrieben:');
            author = '<div class="author">'
                + writtenBy.replace('%s', name)
                + '</div>';
        }
        return '<blockquote>' + author + text + '</blockquote><p>&nbsp;</p>';
    },

    forwardEntry: function(topic_id) {
        var title   = 'WG: ' + jQuery('span[data-edit-topic=' + topic_id +'] [name=name]').attr('value');
        var content = jQuery('span[data-edit-topic=' + topic_id +'] textarea[name=content]').val().trim();
        var is_html = STUDIP.wysiwyg.isHtml(content);
        var nl      = is_html ? '<br>' : "\n";
        var text    = $gettext('Die Senderin/der Sender dieser Nachricht möchte Sie auf den folgenden Beitrag aufmerksam machen. ')
                    + nl + nl
                    + $gettext('Link zum Beitrag: ')
                    + nl
                    + STUDIP.URLHelper.getURL('dispatch.php/course/forum/index/index/'
                    + topic_id + '?cid=' + STUDIP.Forum.seminar_id + '&again=yes#' + topic_id)
                    + nl + nl
                    + content
                    + nl + nl;
        if (is_html) {
            text = STUDIP.wysiwyg.markAsHtml(text);
        }
        STUDIP.Dialog.fromURL(STUDIP.URLHelper.getURL('dispatch.php/messages/write'), {
            data: {
                default_body: text,
                default_subject: title
            },
            method: 'post'
        });
    },

    postToUrl: function(path, params) {
        // create a form
        var form = jQuery('<form method="post" action="' + path + '" style="display: none">');
        for (var key in params) {
            jQuery(form).append('<textarea name="' + key + '">' + params[key] + '</textarea>');
        }

        // append it to the body-element
        jQuery('body').append(form);

        // submit it
        jQuery(form).submit();
    },

    moveThreadDialog: function (topic_id) {
        var element = jQuery('tr[data-area-id=' + topic_id +'] td.areaentry').addClass('selected'),
            content = jQuery('#dialog_' + topic_id).html();

        STUDIP.Dialog.show(content, {
            title: $gettext('Beitrag verschieben'),
            width: 400,
            height: 400,
            origin: element
        });

        element.on('dialog-close', function () {
            $(this).removeClass('selected').off('dialog-close');
        });
    },

    loadAction: function(element, action) {
        jQuery(element).load(STUDIP.URLHelper.getURL('dispatch.php/course/forum/index/'
            + action + '?cid=' + STUDIP.Forum.seminar_id))
    },

    showDialog: function(question, confirm, highlight_element) {
        if (highlight_element !== null) {
            // STUDIP.Forum.highlightedElement = highlight_element;
            jQuery(highlight_element).addClass('selected');
        }

        jQuery('body').append(STUDIP.Forum.confirmDialog({
            question: question,
            confirm: confirm
        }));
    },

    closeDialog: function() {
        jQuery('#forum td.selected').removeClass('selected');
        jQuery('div.modaloverlay').remove();
    },

    setFavorite: function(topic_id) {
        jQuery('#favorite_' + topic_id).load(STUDIP.URLHelper.getURL('dispatch.php/course/forum/index/set_favorite/'
            + topic_id + '?cid=' + STUDIP.Forum.seminar_id));
        jQuery('a.marked[data-topic-id=' + topic_id +']').show();
        return false;
    },

    unsetFavorite: function(topic_id) {
        jQuery('#favorite_' + topic_id).load(STUDIP.URLHelper.getURL('dispatch.php/course/forum/index/unset_favorite/'
            + topic_id + '?cid=' + STUDIP.Forum.seminar_id));
        jQuery('a.marked[data-topic-id=' + topic_id +']').hide();
        return false;
    },

    adminLoadChilds: function(topic_id) {
        // if there is already data present, remove it (to "close" the current node in the tree)
        if (jQuery('li[data-id=' + topic_id + '] ul').length) {
            jQuery('li[data-id=' + topic_id + '] ul').remove();
            return;
        }

        // jQuery('li[data-id=' + topic_id + '] > a.tooltip2').showAjaxNotification();

        // load children from server and show them
        jQuery.ajax(STUDIP.URLHelper.getURL('dispatch.php/course/forum/admin/childs/' + topic_id), {
            dataType: 'html',
            success: function(response) {
                jQuery('li[data-id=' + topic_id + ']').append(response);

                // jQuery('li[data-id=' + topic_id + '] a.tooltip2').hideAjaxNotification();

                // clean up icons
                STUDIP.Forum.checkCutPaste();
            }
        });
    },

    cut : function(topic_id) {
        // remove all childs from clipboard
        jQuery('li[data-id=' + topic_id +'] li.selected').each(function(){
            var tid = jQuery(this).data('id');
            jQuery(this).removeClass('selected');
            delete STUDIP.Forum.clipboard[tid];
        });

        // add this element to clipboard and mark it as selected
        jQuery('li[data-id=' + topic_id +']').addClass('selected');
        jQuery('li[data-id=' + topic_id + '] > a[data-role=cut]').hide();
        jQuery('li[data-id=' + topic_id + '] > a[data-role=cancel_cut]').show();
        STUDIP.Forum.clipboard[topic_id] = topic_id;

        // iterate over every li and remove the paste icon from all li's in the clipboard'
        jQuery('#forum li').each(function() {
            var tid = jQuery(this).data('id');
            if (tid !== null && !STUDIP.Forum.clipboard[tid]) {
                jQuery(this).find('a[data-role=paste]').show();
            } else {
                jQuery(this).find('a[data-role=paste]').hide();
            }
        });

        // clean up icons (if necessary)
        STUDIP.Forum.checkCutPaste();
    },

    cancelCut: function(topic_id) {
        // remove the selected element from the clipboard and unmark it
        jQuery('li[data-id=' + topic_id +']').removeClass('selected');
        jQuery('li[data-id=' + topic_id + '] a[data-role=cut]').show();
        jQuery('li[data-id=' + topic_id + '] > a[data-role=cancel_cut]').hide();

        delete STUDIP.Forum.clipboard[topic_id];

        // all children are now valid paste-targets again
        jQuery('li[data-id=' + topic_id + '] a[data-role=paste]').show();

        if (Object.keys(STUDIP.Forum.clipboard).length == 0) {
            jQuery('a[data-role=paste]').hide();
        }

        // clean up icons (if necessary)
        STUDIP.Forum.checkCutPaste();
    },

    paste: function(topic_id) {
        // jQuery('li[data-id=' + topic_id + '] > a.tooltip2').showAjaxNotification();

        jQuery.ajax(STUDIP.URLHelper.getURL('dispatch.php/course/forum/admin/move/' + topic_id), {
            data : {
                'topics' : STUDIP.Forum.clipboard
            },
            type: 'POST',
            success: function() {
                // jQuery('li[data-id=' + topic_id + '] a.tooltip2').hideAjaxNotification();

                // remove all pasted entries, they are now elsewhere
                for (var id in STUDIP.Forum.clipboard) {
                    jQuery('li[data-id=' + id + ']').remove();
                }

                // reload childs after succesful moving
                jQuery('li[data-id=' + topic_id + '] ul').remove();
                STUDIP.Forum.adminLoadChilds(topic_id);
                // reset icons after succesful moving
                STUDIP.Forum.clipboard = {};
                jQuery('a[data-role=cut]').show();
                jQuery('a[data-role=cancel_cut]').hide();
                jQuery('a[data-role=paste]').hide();
                jQuery('li.selected').removeClass('selected');
            }
        });
    },

    checkCutPaste: function() {
        jQuery('li.selected').find('li').each(function(){
            var tid = jQuery(this).data('id');
            delete STUDIP.Forum.clipboard[tid];

            jQuery(this).removeClass('selected');
            jQuery(this).find('a[data-role=cut]').hide();
            jQuery(this).find('a[data-role=cancel_cut]').hide();
            jQuery(this).find('a[data-role=paste]').hide();
        });
    },

    wrapActionElementText: function (element) {
        if (jQuery('span', element).length > 0) {
            return;
        }
        var img  = jQuery('img', element).remove();
        var text = jQuery(element).text().trim();
        var span = jQuery('<span>').text(text);

        $(element).empty().append(img, span);
    },

    openThreadFromOverview: function(topic_id, parent_topic_id, page) {
        var buttonText = $gettext('Thema schließen');
        var element = jQuery('#closeButton-' + topic_id);

        STUDIP.Forum.wrapActionElementText(element);

        jQuery('img', element).attr('src', STUDIP.ASSETS_URL + 'images/icons/blue/lock-locked.svg');
        jQuery('span', element).text(buttonText);
        jQuery(element).attr('onclick', 'STUDIP.Forum.closeThreadFromOverview("' + topic_id + '", "' + parent_topic_id + '", ' + page + '); return false;');
        jQuery('#img-locked-' + topic_id).hide();

        STUDIP.Forum.openThread(topic_id, parent_topic_id, page, false);

        STUDIP.ActionMenu.closeAll();
    },

    openThreadFromThread: function(topic_id, page) {
        var buttonText = $gettext('Thema schließen');
        jQuery('.closeButtons').text(buttonText);
        jQuery('.closeButtons').attr('onclick', 'STUDIP.Forum.closeThreadFromThread("' + topic_id + '", ' + page + '); return false;');
        jQuery('.closeButtons').closest("li").css('background-image', "url(" + STUDIP.ASSETS_URL + 'images/icons/blue/lock-locked.svg' + ")");
        jQuery('.hideWhenClosed').show();

        STUDIP.Forum.openThread(topic_id, topic_id, page, true);
    },

    openThread: function(topic_id, redirect, page, showSuccessMessage) {
        jQuery.ajax({
            type: 'GET',
            url: STUDIP.URLHelper.getURL('dispatch.php/course/forum/index/open_thread/' + topic_id + '/' + redirect + '/' + page),
            success: function(data) {
                if (showSuccessMessage == true) {
                    jQuery('#message_area').html(data);
                }
            }
        });

        return false;
    },

    closeThreadFromOverview: function(topic_id, parent_topic_id, page) {
        var buttonText = $gettext('Thema öffnen');
        var element = jQuery('#closeButton-' + topic_id);

        STUDIP.Forum.wrapActionElementText(element);

        jQuery('img', element).attr('src', STUDIP.ASSETS_URL + 'images/icons/blue/lock-unlocked.svg');
        jQuery('span', element).text(buttonText);
        jQuery(element).attr('onclick', 'STUDIP.Forum.openThreadFromOverview("' + topic_id + '", ' + page + '); return false;');

        jQuery('#img-locked-' + topic_id).show();

        STUDIP.Forum.closeThread(topic_id, parent_topic_id, page, false);

        STUDIP.ActionMenu.closeAll();
    },

    closeThreadFromThread: function(topic_id, page) {
        var buttonText = $gettext('Thema öffnen');
        jQuery('.closeButtons').text(buttonText);
        jQuery('.closeButtons').attr('onclick', 'STUDIP.Forum.openThreadFromThread("' + topic_id + '", '+ page +'); return false;');
        jQuery('.closeButtons').closest("li").css('background-image', "url(" + STUDIP.ASSETS_URL + 'images/icons/blue/lock-unlocked.svg' + ")");
        jQuery('.hideWhenClosed').hide();

        STUDIP.Forum.cancelNewEntry();

        STUDIP.Forum.closeThread(topic_id, topic_id, page, true);
    },

    closeThread: function(topic_id, redirect, page, showSuccessMessage) {

        jQuery.ajax({
            type: 'GET',
            url: STUDIP.URLHelper.getURL('dispatch.php/course/forum/index/close_thread/' + topic_id + '/' + redirect + '/' + page),
            success: function(data) {
                if (showSuccessMessage == true) {
                    jQuery('#message_area').html(data);
                }
            }
        });

        return false;
    },

    makeThreadStickyFromThread: function(topic_id) {
        jQuery.ajax({
            type: 'GET',
            url: STUDIP.URLHelper.getURL('dispatch.php/course/forum/index/make_sticky/' + topic_id + '/' + topic_id + '/0'),
            success: function(data) {
                jQuery('#message_area').html(data);
                var linkText = $gettext('Hervorhebung aufheben');
                jQuery('#stickyButton').text(linkText);
                jQuery('#stickyButton').attr('onclick', 'STUDIP.Forum.makeThreadUnstickyFromThread("' + topic_id + '"); return false;');
            }
        });

        return false;
    },

    makeThreadUnstickyFromThread: function(topic_id) {
        jQuery.ajax({
            type: 'GET',
            url: STUDIP.URLHelper.getURL('dispatch.php/course/forum/index/make_unsticky/' + topic_id + '/' + topic_id + '/0'),
            success: function(data) {
                jQuery('#message_area').html(data);
                var linkText = $gettext('Thema hervorheben');
                jQuery('#stickyButton').text(linkText);
                jQuery('#stickyButton').attr('onclick', 'STUDIP.Forum.makeThreadStickyFromThread("' + topic_id + '"); return false;');
            }
        });

        return false;
    },
    attachEventHandlers: function () {
        $(document).on('submit', 'form.add_area_form', STUDIP.Forum.doAddArea);
    }
};


// TODO: make TIC and add this to the Stud.IP-Core
/**
 * found at stackoverflow.com
 * http://stackoverflow.com/questions/946534/insert-text-into-textarea-with-jquery/946556#946556
 */
jQuery.fn.extend({
    insertAtCaret: function (myValue) {
        return this.each(function () {
            if (document.selection) {
                //For browsers like Internet Explorer
                this.focus();
                var sel = document.selection.createRange();
                sel.text = myValue;
                this.focus();
            } else if (this.selectionStart || this.selectionStart === '0') {
                //For browsers like Firefox and Webkit based
                var startPos = this.selectionStart;
                var endPos = this.selectionEnd;
                var scrollTop = this.scrollTop;
                this.value = this.value.substring(0, startPos) + myValue
                    + this.value.substring(endPos, this.value.length);
                this.focus();
                this.selectionStart = startPos + myValue.length;
                this.selectionEnd = startPos + myValue.length;
                this.scrollTop = scrollTop;
            } else {
                this.value += myValue;
                this.focus();
            }
        });
    }
});

/**
 * Thanks to Tobias Cohen for this function
 * http://stackoverflow.com/questions/1184624/convert-form-data-to-js-object-with-jquery
 */
jQuery.fn.serializeObject = function() {
    var o = {};
    var a = this.serializeArray();
    jQuery.each(a, function() {
        if (o[this.name] !== undefined) {
            if (!o[this.name].push) {
                o[this.name] = [o[this.name]];
            }
            o[this.name].push(this.value || '');
        } else {
            o[this.name] = this.value || '';
        }
    });
    return o;
};

export default Forum;