(function(){
    "use strict";
    var // jQuery and jQueryUI version
        jqver = '3.3.1',
        uiver = '1.12.1',

        // Detect language (optional)
        lang = (function() {
            var locq = window.location.search,
                map = {
                    'pt' : 'pt_BR',
                    'ug' : 'ug_CN',
                    'zh' : 'zh_CN'
                },
                full = {
                    'zh_tw' : 'zh_TW',
                    'zh_cn' : 'zh_CN',
                    'fr_ca' : 'fr_CA'
                },
                fullLang, locm, lang;
            if (locq && (locm = locq.match(/lang=([a-zA-Z_-]+)/))) {
                // detection by url query (?lang=xx)
                fullLang = locm[1];
            } else {
                // detection by browser language
                fullLang = (navigator.browserLanguage || navigator.language || navigator.userLanguage || '');
            }
            fullLang = fullLang.replace('-', '_').substr(0,5).toLowerCase();
            if (full[fullLang]) {
                lang = full[fullLang];
            } else {
                lang = (fullLang || 'en').substr(0,2);
                if (map[lang]) {
                    lang = map[lang];
                }
            }
            return lang;
        })(),

        // Start elFinder (REQUIRED)
        start = function(elFinder, editors, config) {
            // load jQueryUI CSS
            elFinder.prototype.loadCss('//cdnjs.cloudflare.com/ajax/libs/jqueryui/'+uiver+'/themes/smoothness/jquery-ui.css');

            $(function() {
                var optEditors = {
                        commandsOptions: {
                            edit: {
                                editors: Array.isArray(editors)? editors : []
                            }
                        }
                    },
                    opts = {};

                // Interpretation of "elFinderConfig"
                if (config && config.managers) {
                    $.each(config.managers, function(id, mOpts) {
                        opts = Object.assign(opts, config.defaultOpts || {});
                        // editors marges to opts.commandOptions.edit
                        try {
                            mOpts.commandsOptions.edit.editors = mOpts.commandsOptions.edit.editors.concat(editors || []);
                        } catch(e) {
                            Object.assign(mOpts, optEditors);
                        }
                        // Make elFinder
                        $('#' + id).elfinder(
                            // 1st Arg - options
                            $.extend(true, { lang: lang }, opts, mOpts || {}),
                            // 2nd Arg - before boot up function
                            function(fm, extraObj) {
                                // `init` event callback function
                                fm.bind('init', function() {
                                    // Optional for Japanese decoder "encoding-japanese"
                                    if (fm.lang === 'ja') {
                                        require(
                                            [ 'encoding-japanese' ],
                                            function(Encoding) {
                                                if (Encoding && Encoding.convert) {
                                                    fm.registRawStringDecoder(function(s) {
                                                        return Encoding.convert(s, {to:'UNICODE',type:'string'});
                                                    });
                                                }
                                            }
                                        );
                                    }
                                });
                            }
                        );
                    });
                } else {
                    alert('"elFinderConfig" object is wrong.');
                }
            });
        },

        // JavaScript loader (REQUIRED)
        load = function() {
            require([
                    'elfinder'
                    , 'extras/editors.default.min'               // load text, image editors
                    , 'elFinderConfig'
                    //	, 'extras/quicklook.googledocs.min'          // optional preview for GoogleApps contents on the GoogleDrive volume
                ],
                start,
                function(error) {
                    alert(error.message);
                }
            );
        },

        // is IE8 or :? for determine the jQuery version to use (optional)
        old = (typeof window.addEventListener === 'undefined' && typeof document.getElementsByClassName === 'undefined')
            ||
            (!window.chrome && !document.unqueID && !window.opera && !window.sidebar && 'WebkitAppearance' in document.documentElement.style && document.body.style && typeof document.body.style.webkitFilter === 'undefined');

    // config of RequireJS (REQUIRED)
    require.config({
        baseUrl : "{{ mainUrl }}",
        paths : {
            'jquery'   : '//cdnjs.cloudflare.com/ajax/libs/jquery/'+(old? '1.12.4' : jqver)+'/jquery.min',
            'jquery-ui': '//cdnjs.cloudflare.com/ajax/libs/jqueryui/'+uiver+'/jquery-ui.min',
            'elfinder' : 'elfinder.min',
            'encoding-japanese': '//cdn.rawgit.com/polygonplanet/encoding.js/1.0.26/encoding.min'
        },
        waitSeconds : 10 // optional
    });

    // load JavaScripts (REQUIRED)
    load();

})();
