import { NgModule, Optional, SkipSelf } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { HttpClientModule, HttpClient } from '@angular/common/http';

// libs
import { TranslateLoader, TranslateModule } from '@ngx-translate/core';
import { TranslateHttpLoader } from '@ngx-translate/http-loader';
import { throwIfAlreadyLoaded } from '@<%= npmScope %>/utils';
import { CoreModule, PlatformLanguageToken, PlatformWindowToken } from '@<%= npmScope %>/core';<% if (sample) { %>
import { ITEM_PROVIDERS } from '@<%= npmScope %>/features';<% } %>

// bring in custom web services here...

// factories
export function winFactory() {
  return window;
}

export function platformLangFactory() {
  const browserLang = window.navigator.language || 'en'; // fallback English
  // browser language has 2 codes, ex: 'en-US'
  return browserLang.split('-')[0];
}

export function createTranslateLoader(http: HttpClient) {
  return new TranslateHttpLoader(http, `./assets/i18n/`, '.json');
}

@NgModule({
  imports: [
    BrowserModule,
    HttpClientModule,
    CoreModule.forRoot([
      {
        provide: PlatformLanguageToken,
        useFactory: platformLangFactory
      },
      {
        provide: PlatformWindowToken,
        useFactory: winFactory
      }
    ]),
    TranslateModule.forRoot({
      loader: {
        provide: TranslateLoader,
        useFactory: createTranslateLoader,
        deps: [HttpClient]
      }
    })
  ]<% if (sample) { %>,
  providers: [
    ...ITEM_PROVIDERS
  ]<% } %>
})
export class <%= utils.classify(prefix) %>CoreModule {
  constructor(
    @Optional()
    @SkipSelf()
    parentModule: <%= utils.classify(prefix) %>CoreModule
  ) {
    throwIfAlreadyLoaded(parentModule, '<%= utils.classify(prefix) %>CoreModule');
  }
}