// ボットアダプターを生成する。
// Connector と Bot プログラムの橋渡し、認証処理などを行う。
function createBotAdapter(config) {
  // See https://aka.ms/about-bot-adapter to learn more about bot adapter.
  const { BotFrameworkAdapter } = require('botbuilder');
  const adapter = new BotFrameworkAdapter(config);

  // Catch-all for any unhandled errors in your bot.
  adapter.onTurnError = async (context, error) => {
      // This check writes out errors to console log .vs. app insights.
      console.error(`\n [onTurnError]: ${ error }`);
      // Send a message to the user
      await context.sendActivity(`Oops. Something went wrong!`);
  };

  return adapter;
}

// ボットサーバーを起動する
function startServer(adapter, bot) {
  const restify = require('restify');

  let server = restify.createServer();
  server.listen(process.env.port || process.env.PORT || 3978, function() {
    console.log(`\nBot server listening to ${ server.url }`);
  });

  // Listen for incoming activities and route them to your bot main dialog.
  server.post('/api/messages', (req, res) => {
    adapter.processActivity(req, res, async (context) => {
      await bot.onTurn(context);
    });
  });
}

// エントリポイント
(function main() {
  const { Bot } = require('./bot.js');
  const config = require('./config.js');
  const adapter = createBotAdapter(config);
  const bot = new Bot();
  startServer(adapter, bot);
})();