import { MongoClient } from 'mongodb';
import { loadConfig } from './config.js';

export const DEFAULT_MONGODB_URI = 'mongodb://172.16.0.7:27017';
export const DEFAULT_MONGODB_DB = 'basket_utils';

export async function createMongoStore(options = {}) {
  const config = options.config || (options.uri && options.dbName ? null : await loadConfig());
  const uri = options.uri || config?.mongodb?.uri || DEFAULT_MONGODB_URI;
  const dbName = options.dbName || config?.mongodb?.db || DEFAULT_MONGODB_DB;
  const client = options.client || new MongoClient(uri, { maxPoolSize: 10, serverSelectionTimeoutMS: options.serverSelectionTimeoutMS || 5000 });
  try { await client.connect(); } catch (error) { if (!options.client) await client.close().catch(() => {}); throw error; }
  const database = client.db(dbName);
  const users = database.collection('users');
  const sessions = database.collection('sessions');
  const teams = database.collection('teams');
  const teamMembers = database.collection('team_members');
  const plays = database.collection('plays');
  try {
    await Promise.all([
      users.createIndex({ email: 1 }, { unique: true }),
      sessions.createIndex({ tokenHash: 1 }, { unique: true }),
      sessions.createIndex({ expiresAt: 1 }, { expireAfterSeconds: 0 }),
      teamMembers.createIndex({ teamId: 1, userId: 1 }, { unique: true }),
      teamMembers.createIndex({ userId: 1 }),
      plays.createIndex({ teamId: 1, id: 1 }, { unique: true }),
      plays.createIndex({ teamId: 1, updatedAt: -1 }),
    ]);
  } catch (error) {
    if (!options.client) await client.close().catch(() => {});
    throw error;
  }
  return {
    client, database, users, sessions, teams, teamMembers, plays,
    async close() { if (!options.client) await client.close(); },
  };
}