const PassportLocalStrategy = require('passport-local').Strategy;
const db = require('../models');
const logger = require('winston');

function returnUserAndChannelInfo (userInstance) {
  return new Promise((resolve, reject) => {
    let userInfo = {};
    userInfo['id'] = userInstance.id;
    userInfo['userName'] = userInstance.userName;
    userInstance
      .getChannel()
      .then(({channelName, channelClaimId}) => {
        userInfo['channelName'] = channelName;
        userInfo['channelClaimId'] = channelClaimId;
        return db.Certificate.getShortChannelIdFromLongChannelId(channelClaimId, channelName);
      })
      .then(shortChannelId => {
        userInfo['shortChannelId'] = shortChannelId;
        resolve(userInfo);
      })
      .catch(error => {
        reject(error);
      });
  });
}

module.exports = new PassportLocalStrategy(
  {
    usernameField: 'username',
    passwordField: 'password',
  },
  (username, password, done) => {
    logger.debug('logging user in');
    return db
      .User
      .findOne({where: {userName: username}})
      .then(user => {
        if (!user) {
          // logger.debug('no user found');
          return done(null, false, {message: 'Incorrect username or password'});
        }
        user.comparePassword(password, (passwordErr, isMatch) => {
          if (passwordErr) {
            logger.error('passwordErr:', passwordErr);
            return done(null, false, {message: passwordErr});
          }
          if (!isMatch) {
            // logger.debug('incorrect password');
            return done(null, false, {message: 'Incorrect username or password'});
          }
          logger.debug('Password was a match, returning User');
          return returnUserAndChannelInfo(user)
            .then((userInfo) => {
              return done(null, userInfo);
            })
            .catch(error => {
              return done(error);
            });
        });
      })
      .catch(error => {
        return done(error);
      });
  }
);