var app = require('koa')();
var locale = require('koa-locale'); //  detect the locale
var locals = require('koa-locals'); //  local variables for templates render
var render = require('koa-swig');   //  swig render
var i18n = require('koa-i18n');

// Required! 
locale(app);

// Working together with template render must require!
locals(app)
render(app, {
  root: __dirname + '/views/',
  ext: 'html'
});

app.use(i18n(app, {
  directory: './config/locales',
  locales: ['zh-CN', 'en'],       //  `zh-CN` defualtLocale, must match the locales to the filenames
  query: true,                    //  optional detect querystring - `/?lang=en-US`
  subdomain: true,                //  optional detect subdomain   - `zh-CN.koajs.com`
  cookie: true,                   //  optional detect cookie      - `Accept-Language: zh-CN,zh;q=0.5`
  header: true                    //  optional detect header      - `Cookie: lang=zh-TW`
}));

app.use(function *(next) {
  this.body = this.i18n.__('any key');
});

app.use(function *(next) {
  yield this.render('index')
});