const clickhouse = require('../database/clickhouse');
const jwt = require('jsonwebtoken');

const JWT_SECRET = 'secretkey';


const loginUser = async (req, res) => {
  try {
    const { username, password } = req.body;

    if (!username || !password) {
      return res.status(400).json({ 
        success: false, 
        message: "Username and password are required",
        token: null
      });
    }

   
    const resultSet = await clickhouse.query({
      query: 'SELECT * FROM usertable WHERE username = {user: String} AND password = {pass: String}',
      query_params: {
        user: username,
        pass: password
      },
      format: 'JSONEachRow',
    });

    const rows = await resultSet.json();


    if (rows.length === 0) {
      return res.status(401).json({ 
        success: false, 
        message: "Invalid username or password",
        token: null
      });
    }

    const user = rows[0];


    const token = jwt.sign(
      { 
        client_id: user.client_id,
        userid: user.userid, 
        username: user.username 
      },
      JWT_SECRET,
      { expiresIn: '24h' }
    );

  
    res.status(200).json({
      success: true,
      message: "Login successful",
      token: token,
    });

  } catch (error) {
    console.error("Login Error:", error);
    res.status(500).json({ 
      success: false, 
      message: "Internal server error", 
      error: error.message 
    });
  }
};

module.exports = { loginUser };