/*
 * Adds Internationalization and localization to mediaelement.
 *
 * This file does not contain translations, you have to add them manually.
 * The schema is always the same: me-i18n-locale-[IETF-language-tag].js
 *
 * Examples are provided both for german and chinese translation.
 *
 *
 * What is the concept beyond i18n?
 *   http://en.wikipedia.org/wiki/Internationalization_and_localization
 *
 * What langcode should i use?
 *   http://en.wikipedia.org/wiki/IETF_language_tag
 *   https://tools.ietf.org/html/rfc5646
 *
 *
 * License?
 *
 *   The i18n file uses methods from the Drupal project (drupal.js):
 *     - i18n.methods.t() (modified)
 *     - i18n.methods.checkPlain() (full copy)
 *
 *   The Drupal project is (like mediaelementjs) licensed under GPLv2.
 *    - http://drupal.org/licensing/faq/#q1
 *    - https://github.com/johndyer/mediaelement
 *    - http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 *
 *
 * @author
 *   Tim Latz (latz.tim@gmail.com)
 *
 *
 * @params
 *  - context - document, iframe ..
 *  - exports - CommonJS, window ..
 *
 */
;(function(context, exports, undefined) {
    "use strict";

    var i18n = {
        "locale": {
            // Ensure previous values aren't overwritten.
            "language" : (exports.i18n && exports.i18n.locale.language) || '',
            "strings" : (exports.i18n && exports.i18n.locale.strings) || {}
        },
        "ietf_lang_regex" : /^(x\-)?[a-z]{2,}(\-\w{2,})?(\-\w{2,})?$/,
        "methods" : {}
    };
// start i18n


    /**
     * Get language, fallback to browser's language if empty
     *
     * IETF: RFC 5646, https://tools.ietf.org/html/rfc5646
     * Examples: en, zh-CN, cmn-Hans-CN, sr-Latn-RS, es-419, x-private
     */
    i18n.getLanguage = function () {
        var language = i18n.locale.language || window.navigator.userLanguage || window.navigator.language;
        return i18n.ietf_lang_regex.exec(language) ? language : null;

        //(WAS: convert to iso 639-1 (2-letters, lower case))
        //return language.substr(0, 2).toLowerCase();
    };

    // i18n fixes for compatibility with WordPress
    if ( typeof mejsL10n != 'undefined' ) {
        i18n.locale.language = mejsL10n.language;
    }



    /**
     * Encode special characters in a plain-text string for display as HTML.
     */
    i18n.methods.checkPlain = function (str) {
        var character, regex,
        replace = {
            '&': '&amp;',
            '"': '&quot;',
            '<': '&lt;',
            '>': '&gt;'
        };
        str = String(str);
        for (character in replace) {
            if (replace.hasOwnProperty(character)) {
                regex = new RegExp(character, 'g');
                str = str.replace(regex, replace[character]);
            }
        }
        return str;
    };

    /**
     * Translate strings to the page language or a given language.
     *
     *
     * @param str
     *   A string containing the English string to translate.
     *
     * @param options
     *   - 'context' (defaults to the default context): The context the source string
     *     belongs to.
     *
     * @return
     *   The translated string, escaped via i18n.methods.checkPlain()
     */
    i18n.methods.t = function (str, options) {

        // Fetch the localized version of the string.
        if (i18n.locale.strings && i18n.locale.strings[options.context] && i18n.locale.strings[options.context][str]) {
            str = i18n.locale.strings[options.context][str];
        }

        return i18n.methods.checkPlain(str);
    };


    /**
     * Wrapper for i18n.methods.t()
     *
     * @see i18n.methods.t()
     * @throws InvalidArgumentException
     */
    i18n.t = function(str, options) {

        if (typeof str === 'string' && str.length > 0) {

            // check every time due language can change for
            // different reasons (translation, lang switcher ..)
            var language = i18n.getLanguage();

            options = options || {
                "context" : language
            };

            return i18n.methods.t(str, options);
        }
        else {
            throw {
                "name" : 'InvalidArgumentException',
                "message" : 'First argument is either not a string or empty.'
            };
        }
    };

// end i18n
    exports.i18n = i18n;
}(document, mejs));

// i18n fixes for compatibility with WordPress
;(function(exports, undefined) {

    "use strict";

    if ( typeof mejsL10n != 'undefined' ) {
        exports[mejsL10n.language] = mejsL10n.strings;
    }

}(mejs.i18n.locale.strings));
