import jwt from 'jsonwebtoken';
import { query } from '../db/index.js';
import { asyncHandler } from './errorHandler.js';

export const authMiddleware = (req, res, next) => {
  const authHeader = req.headers.authorization;

  if (!authHeader || !authHeader.startsWith('Bearer ')) {
    return res.status(401).json({ error: 'No token provided' });
  }

  const token = authHeader.substring(7);

  try {
    const decoded = jwt.verify(token, process.env.JWT_SECRET);
    req.user = decoded; // { userId, email, username }
    next();
  } catch (error) {
    return res.status(401).json({ error: 'Invalid token' });
  }
};

// Enhanced version that fetches user data including admin status
export const verifyToken = asyncHandler(async (req, res, next) => {
  const authHeader = req.headers.authorization;

  if (!authHeader || !authHeader.startsWith('Bearer ')) {
    return res.status(401).json({ error: 'No token provided' });
  }

  const token = authHeader.substring(7);
  const decoded = jwt.verify(token, process.env.JWT_SECRET);

  // Fetch full user data including admin status
  const users = await query(
    'SELECT id, email, username, is_admin FROM users WHERE id = ?',
    [decoded.userId]
  );

  if (users.length === 0) {
    return res.status(401).json({ error: 'User not found' });
  }

  req.user = {
    userId: users[0].id,
    email: users[0].email,
    username: users[0].username,
    is_admin: users[0].is_admin
  };
  
  next();
});