/**
 * translations.ts is where we concat all translations.
 */
import { OpaqueToken } from '@angular/core';
import { NgModule, ModuleWithProviders } from '@angular/core';

// import translations
import { SystemLocales } from './system-locales';
import { CORE_LABELS_EN } from './core-labels-en';
import { CORE_LABELS_AR } from './core-labels-ar';
import { CORE_NOTIFICATION_MESSAGES_EN } from './core-messages-en';
import { CORE_NOTIFICATION_MESSAGES_AR } from './core-messages-ar';


/**
 *We created an opaque token called translations.
 *An opaque token is an object with no application interfaces.
 *It's a special kind of provider lookup key for use in dependency injection.
 */
export const TRANSLATIONS = new OpaqueToken('translations');

// links all our translations.
let dictionary = {
  [SystemLocales.LANG_EN]: CORE_LABELS_EN,
  [SystemLocales.LANG_AR]: CORE_LABELS_AR,
};
$.extend(true, dictionary[SystemLocales.LANG_EN], CORE_NOTIFICATION_MESSAGES_EN)
$.extend(true, dictionary[SystemLocales.LANG_AR], CORE_NOTIFICATION_MESSAGES_AR)
//  we use the opaque token that we defined earlier, and supply our dictionary as value.
export const TRANSLATION_PROVIDERS = [
  { provide: TRANSLATIONS, useValue: dictionary },
];


//  dropdown list words with keys
export const SUPPORTED_LANGUAGES = [
  { display: 'English', value: 'en' },
  { display: 'العربية', value: 'ar' }
];

/**
 * @desc a class to get other translations files from all modules
 * and add them to the core dictionary
 * @export
 * @class CoreTranslation
 */
export class CoreTranslation {

  static addTranslationModule(translationMap: Map<string, Object>) {

    //get translations map of modules according to languages keys
    let moduleEnglishTranslations = translationMap.get(SystemLocales.LANG_EN);
    let moduleArabicTranslations = translationMap.get(SystemLocales.LANG_AR);

    // copy array of keys (objects) of modules to the core array
    $.extend(true, dictionary[SystemLocales.LANG_EN], moduleEnglishTranslations);
    $.extend(true, dictionary[SystemLocales.LANG_AR], moduleArabicTranslations);

  }
}