rentall-app/backend/routes/auth.js

const express = require('express');
const jwt = require('jsonwebtoken');
const { User } = require('../models'); // Import from models/index.js to get models with associations
const router = express.Router();

router.post('/register', async (req, res) => {
  try {
    const { username, email, password, firstName, lastName, phone } = req.body;

    const existingUser = await User.findOne({
      where: {
        [require('sequelize').Op.or]: [{ email }, { username }]
      }
    });

    if (existingUser) {
      return res.status(400).json({ error: 'User already exists' });
    }

    const user = await User.create({
      username,
      email,
      password,
      firstName,
      lastName,
      phone
    });

    const token = jwt.sign({ userId: user.id }, process.env.JWT_SECRET, {
      expiresIn: '7d'
    });

    res.status(201).json({
      user: {
        id: user.id,
        username: user.username,
        email: user.email,
        firstName: user.firstName,
        lastName: user.lastName
      },
      token
    });
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
});

router.post('/login', async (req, res) => {
  try {
    const { email, password } = req.body;

    const user = await User.findOne({ where: { email } });

    if (!user || !(await user.comparePassword(password))) {
      return res.status(401).json({ error: 'Invalid credentials' });
    }

    const token = jwt.sign({ userId: user.id }, process.env.JWT_SECRET, {
      expiresIn: '7d'
    });

    res.json({
      user: {
        id: user.id,
        username: user.username,
        email: user.email,
        firstName: user.firstName,
        lastName: user.lastName
      },
      token
    });
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
});

module.exports = router;