(function () {

    "use strict";

    angular
        .module("app.helpers")
        .service("helpers.localization", localizationHelper);

    function localizationHelper($translate, eventEmitterService) {

        this.defaultLanguage = 'en';
        this.eventEmitter = new eventEmitterService.EventEmitter();
        
        this.setLanguage = function (lang) {
            $translate.use(lang);
            window.appLocalStorage.set('app_lang', lang);
            document.documentElement.setAttribute('lang', lang);
            setTimeout(function () {
                this.eventEmitter.emit('onLanguageChangedEvent', lang);
            }.bind(this), 100);
        }

        this.getCurrentLanguage = function () {
            var languageCode = window.appLocalStorage.get("app_lang");
            if (languageCode) {
                return languageCode;
            }
            return this.defaultLanguage;
        }

        var timerId = setInterval(function () {
            if (window.appLocalStorage) {
                clearTimeout(timerId);
                this.setLanguage(this.getCurrentLanguage());
            }
        }.bind(this), 50);
    }

    // IoC container.
    localizationHelper.$inject = [
        "$translate",
        "appModels.eventEmitterService"
    ];

})();