import { Request, Response } from 'express';
import bcrypt from 'bcryptjs';
import jwt from 'jsonwebtoken';
import { PrismaClient } from '@prisma/client';

const prisma = new PrismaClient();
const JWT_SECRET = process.env.JWT_SECRET || 'kodelyx-super-secret-key-123';

export const signup = async (req: Request, res: Response) => {
  try {
    const { firstName, lastName, email, phone, password } = req.body;

    if (!firstName || !lastName || !email || !phone || !password) {
      return res.status(400).json({ message: 'All fields are required.' });
    }

    const existingUser = await prisma.user.findUnique({ where: { email } });
    if (existingUser) {
      return res.status(400).json({ message: 'Email address already registered.' });
    }

    const hashedPassword = await bcrypt.hash(password, 10);

    const user = await prisma.user.create({
      data: {
        firstName,
        lastName,
        email,
        phone,
        password: hashedPassword
      }
    });

    return res.status(201).json({
      message: 'Account created successfully.',
      user: { id: user.id, email: user.email, firstName: user.firstName, lastName: user.lastName }
    });
  } catch (error: any) {
    console.error('Signup error:', error);
    return res.status(500).json({ message: 'Internal server error during registration.' });
  }
};

export const signin = async (req: Request, res: Response) => {
  try {
    const { email, password } = req.body;

    if (!email || !password) {
      return res.status(400).json({ message: 'Email and password are required.' });
    }

    const user = await prisma.user.findUnique({ where: { email } });
    if (!user) {
      return res.status(401).json({ message: 'Invalid credentials.' });
    }

    const isMatch = await bcrypt.compare(password, user.password);
    if (!isMatch) {
      return res.status(401).json({ message: 'Invalid credentials.' });
    }

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

    return res.json({
      message: 'Logged in successfully.',
      token,
      user: {
        id: user.id,
        email: user.email,
        firstName: user.firstName,
        lastName: user.lastName,
        phone: user.phone
      }
    });
  } catch (error: any) {
    console.error('Signin error:', error);
    return res.status(500).json({ message: 'Internal server error during login.' });
  }
};