import bancho from './bancho.js';
import db from './database.js';
import {init_lobby} from './ranked.js';


// Create a new bancho match, and copy existing lobby settings
async function reopen_lobby(match) {
  console.info(`Recreating lobby #${match.match_id}`);

  const new_lobby = await bancho.make('New o!RL lobby');
  await init_lobby(new_lobby, JSON.parse(match.data), true);
  db.prepare(`UPDATE match SET reopened_as = ? WHERE match_id = ?`).run(new_lobby.id, match.match_id);
  return new_lobby;
}

// Join an existing bancho match, or recreate it if it no longer exists
async function rejoin_lobby(match) {
  console.info(`Rejoining lobby #${match.match_id}`);

  let new_lobby = null;
  try {
    const bancho_lobby = await bancho.join('#mp_' + match.match_id);
    new_lobby = await init_lobby(bancho_lobby, JSON.parse(match.data), false);
  } catch (err) {
    console.error(`Failed to rejoin lobby #${match.match_id}: ${err}`);
    db.prepare(`UPDATE match SET end_time = ? WHERE match_id = ?`).run(Date.now(), match.match_id);

    try {
      new_lobby = await reopen_lobby(match);
    } catch (err) {
      console.error(`Failed to reopen lobby #${match.match_id}: ${err}`);
    }
  }

  return new_lobby;
}

// Rejoin lobbies if none are open
async function auto_rejoin_lobbies() {
  if (bancho.joined_lobbies.length > 0) return;

  const lobbies = db.prepare(`SELECT * FROM match WHERE end_time IS NULL`).all();
  if (lobbies.length > 0) {
    // Bancho restarted, we need to recreate all the lobbies that got closed just now
    const promises = [];
    for (const lobby of lobbies) {
      promises.push(rejoin_lobby(lobby));
    }
    await Promise.all(promises);
  } else {
    // All lobbies got closed, we need to reopen at least one lobby for convenience
    try {
      const last_lobby = db.prepare(`SELECT * FROM match WHERE reopened_as IS NULL ORDER BY end_time DESC LIMIT 1`).get();
      if (!last_lobby) throw new Error('You need to create the first lobby manually');
      await reopen_lobby(last_lobby);
    } catch (err) {
      console.error(`Failed to create default lobby: ${err}`);
    }
  }
}

export {auto_rejoin_lobbies};