import { Request, Response, Router } from 'express';
import bcrypt from 'bcrypt';
import { SignJWT } from 'jose';
import { JWT_ISSUER, JWT_AUDIENCE, JWT_SECRET, JWT_EXPIRATION, JWT_SECRET_KEY } from '../config/auth.config';
import { Member, User } from '../types/member';
import memberService from '../services/member.service';
import { Either, eitherLeft, eitherRight } from '../utils/utils';

const register = (req: Request, res: Response) => {
  if (!req || !req.body || !req.body.name || !req.body.password) {
    res.status(400).send();
    return;
  }
  const name: string = req.body.name;
  bcrypt.genSalt(10, (err, salt) => {
    if (err) {
      res.status(500).send();
      return;
    }
    bcrypt.hash(req.body.password, salt, async (err, hash) => {
      if (err) {
        res.status(500).send();
        return;
      }
      const member: Either<Member, string> = await memberService.createMember(name, hash);
      if (member.hasRight) {
        res.status(401).send(member.right);
        return;
      }
      const token = await new SignJWT({ name })
        .setProtectedHeader({ alg: 'HS256' })
        .setAudience(JWT_AUDIENCE)
        .setIssuer(JWT_ISSUER)
        .setExpirationTime(JWT_EXPIRATION)
        .sign(JWT_SECRET_KEY);
      res.status(200).send({ member: memberService.userAdapter(member.left), token: token });
    });
  });
};

const login = async (req: Request, res: Response) => {
  if (!req || !req.body || !req.body.name || !req.body.password) {
    res.status(400).send();
    return;
  }
  const name: string = req.body.name;
  const member: Either<Member, string> = await memberService.getMember(name);
  if (member.hasRight) {
    res.send(member.right).send();
    return;
  }
  bcrypt.compare(req.body.password, member.left.password, async (err, r) => {
    if (err) {
      res.status(500).send();
      return;
    }
    if (!r) {
      res.status(401).send();
      return;
    }
    const token = await new SignJWT({ name })
      .setProtectedHeader({ alg: 'HS256' })
      .setAudience(JWT_AUDIENCE)
      .setIssuer(JWT_ISSUER)
      .setExpirationTime(JWT_EXPIRATION)
      .sign(JWT_SECRET_KEY);
    res.status(200).send({ member: memberService.userAdapter(member.left), token: token });
  });
};

export { register, login };