import passwords from 'passwords';
import auth from 'basic-auth';
import debugname from 'debug';
const debug = debugname('hostr-api:auth');

const badLoginMsg = '{"error": {"message": "Incorrect login details.", "code": 607}}';

export default function* (next) {
  const Users = this.db.Users;
  const Files = this.db.Files;
  const Logins = this.db.Logins;
  let user = false;

  if (this.req.headers.authorization && this.req.headers.authorization[0] === ':') {
    debug('Logging in with token');
    const userToken = yield this.redis.get(this.req.headers.authorization.substr(1));
    this.assert(userToken, 401, '{"error": {"message": "Invalid token.", "code": 606}}');
    debug('Token found');
    user = yield Users.findOne({ _id: this.db.objectId(userToken) });
  } else {
    const authUser = auth(this);
    this.assert(authUser, 401, badLoginMsg);
    const remoteIp = this.req.headers['x-real-ip'] || this.req.connection.remoteAddress;
    const count = yield Logins.count({
      ip: remoteIp,
      successful: false,
      at: { $gt: Math.ceil(Date.now() / 1000) - 600 },
    });
    this.assert(count < 25, 401,
      '{"error": {"message": "Too many incorrect logins.", "code": 608}}');

    yield Logins.insertOne({ ip: remoteIp, at: Math.ceil(Date.now() / 1000), successful: null });
    user = yield Users.findOne({
      email: authUser.name,
      banned: { $exists: false },
      status: { $ne: 'deleted' },
    });
    this.assert(user, 401, badLoginMsg);
    const authenticated = yield passwords.match(authUser.pass, user.salted_password);
    this.assert(authenticated, 401, badLoginMsg);
  }
  debug('Checking user');
  this.assert(user, 401, badLoginMsg);
  debug('Checking user is activated');
  this.assert(!user.activationCode, 401,
    '{"error": {"message": "Account has not been activated.", "code": 603}}');

  const uploadedTotal = yield Files.count({ owner: user._id, status: { $ne: 'deleted' } });
  const uploadedToday = yield Files.count({
    owner: user._id,
    time_added: { $gt: Math.ceil(Date.now() / 1000) - 86400 },
  });

  const normalisedUser = {
    id: user._id,
    email: user.email,
    daily_upload_allowance: user.type === 'Pro' ? 'unlimited' : 15,
    file_count: uploadedTotal,
    max_filesize: user.type === 'Pro' ? 524288000 : 20971520,
    plan: user.type || 'Free',
    uploads_today: uploadedToday,
  };
  this.response.set('Daily-Uploads-Remaining',
    user.type === 'Pro' ? 'unlimited' : 15 - uploadedToday);
  this.user = normalisedUser;
  debug('Authenticated user: ', this.user.email);
  yield next;
}