const User = require("../models/User");
const jwt = require("jsonwebtoken");

const generateToken = (id) => {
  return jwt.sign({ id }, process.env.JWT_SECRET, { expiresIn: "1h" });
};

//Register
const registerUser = async (req, res) => {
  const { username, email, password } = req.body;

  try {
    const userExists = await User.findOne({ email });
    if (userExists)
      return res.status(400).json({ message: "User already exists" });

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

    res.status(201).json({
      _id: user._id,
      username: user.username,
      email: user.email,
      token: generateToken(user._id),
    });
  } catch (error) {
  console.error("Error in registerUser:", error.message);
  res.status(500).json({ message: "Server error" });
}

};
//Login
const loginUser = async (req, res) => {
  const { email, password } = req.body;

  try {
    const user = await User.findOne({ email });
    if (!user) return res.status(400).json({ message: "Invalid credentials" });

    const isMatch = await user.matchPassword(password);
    if (!isMatch)
      return res.status(400).json({ message: "Invalid credentials" });

    res.status(200).json({
      _id: user._id,
      username: user.username,
      email: user.email,
      token: generateToken(user._id),
      message: "success",
    });
  } catch (error) {
    res.status(500).json({ message: "Server error" });
  }
};
const getProfile = async (req, res) => {
  res.json(req.user);
};

module.exports = { registerUser, loginUser, getProfile };