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

const authenticateToken = async (req, res, next) => {
  const authHeader = req.headers["authorization"];
  const token = authHeader && authHeader.split(" ")[1];

  if (!token) {
    return res.status(401).json({ error: "Access token required" });
  }

  try {
    const decoded = jwt.verify(token, process.env.JWT_SECRET);
    const userId = decoded.id;

    if (!userId) {
      return res.status(401).json({ error: "Invalid token format" });
    }

    const user = await User.findByPk(userId);

    if (!user) {
      return res.status(401).json({ error: "User not found" });
    }

    req.user = user;
    next();
  } catch (error) {
    console.error("Auth middleware error:", error);
    return res.status(403).json({ error: "Invalid or expired token" });
  }
};

module.exports = { authenticateToken };