/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; under version 2
 * of the License (non-upgradable).
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * Copyright (c) 2016-2021 (original work) Open Assessment Technlogies SA
 *
 */
define(['lodash', 'jquery', 'tpl!taoQtiItem/qtiCreator/tpl/notifications/deletingInfoBox'], function (
    _,
    $,
    deletingInfoTpl
) {
    'use strict';

    const _timeout = 10000;
    let undoDeleting = false;

    const _destroy = function _destroy($messageBox) {
        $('body').off('.deleting');
        $messageBox.remove();
        undoDeleting = false;
    };

    const undo = function undo($messageBox) {
        undoDeleting = true;
        $messageBox.trigger('undo.deleting');
        _destroy($messageBox);
    };

    const _confirmDeletion = function ($messageBox, fadeDelay) {
        //only allow deletion if the message has not already been deleted yet
        if (!undoDeleting && $messageBox.length && $.contains(document, $messageBox[0])) {
            $messageBox.trigger('confirm.deleting');
            $messageBox.fadeOut(fadeDelay, function () {
                _destroy($messageBox);
            });
        }
    };

    const _bindEvents = function _bindEvents($messageBox) {
        $('body').on('mousedown.deleting keydown.deleting', function (e) {
            if (e.ctrlKey || e.metaKey) {
                //trigger undo callback if the standard keyboard shortcut ctrl+z is triggered
                if (e.keyCode === 90) {
                    //z-key
                    undo($messageBox);
                }
                e.preventDefault();
                return;
            }

            //confirm deleting whenever user interact with another object
            if (e.target !== $messageBox[0] && !$.contains($messageBox[0], e.target)) {
                _confirmDeletion($messageBox, 400);
            }
        });

        $messageBox.find('a.undo').on('click', function (e) {
            e.preventDefault();
            undo($messageBox);
        });

        $messageBox.find('.close-trigger').on('click', function (e) {
            e.preventDefault();
            _confirmDeletion($messageBox, 0);
        });

        setTimeout(function () {
            _confirmDeletion($messageBox, 1000);
        }, _timeout);
    };

    const deletingHelper = {
        createInfoBox: function (widgets) {
            const $messageBox = $(
                deletingInfoTpl({
                    serial: 'widgets',
                    count: widgets.length
                })
            );

            $('body').append($messageBox);

            $messageBox.css({
                display: 'block',
                position: 'fixed',
                top: '50px',
                left: '50%',
                'margin-left': '-200px',
                width: '400px',
                zIndex: 999999
            });

            _bindEvents($messageBox);

            return $messageBox;
        },
        confirmDeletion: function ($messageBox) {
            _confirmDeletion($messageBox, 0);
        }
    };

    return deletingHelper;
});