server.js

import express from "express";
import dotenv from "dotenv";
import cors from "cors";
import jwt from "jsonwebtoken";
import bcrypt from "bcryptjs";
import { PrismaClient } from "@prisma/client";
import downloadRoutes from "./routes/download.routes.js";

// Load environment variables
dotenv.config();

// Initialize Prisma client
const prisma = new PrismaClient();

// Create Express app
const app = express();
app.use(cors());
app.use(express.json());

// Register Route
app.post("/signup", async (req, res) => {
  try {
    const {
      fullName,
      email,
      rollNumber,
      dateOfBirth,
      school,
      program,
      specialization,
      password,
      confirmPassword
    } = req.body;

    if (!fullName || !email || !password || !confirmPassword) {
      return res.status(400).json({ message: "All required fields must be filled." });
    }

    if (password !== confirmPassword) {
      return res.status(400).json({ message: "Passwords do not match." });
    }

    const existingUser = await prisma.user.findUnique({ where: { email } });
    if (existingUser) {
      return res.status(409).json({ message: "User already exists with this email." });
    }

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

    await prisma.user.create({
      data: {
        fullName,
        email,
        rollNumber,
        dateOfBirth,
        school,
        program,
        specialization,
        password: hashedPassword
      }
    });

    res.status(201).json({ message: "User registered successfully." });
  } catch (error) {
    console.error("Signup error:", error);
    res.status(500).json({ message: "Server error during signup." });
  }
});

// Login Route
app.post("/login", async (req, res) => {
  try {
    const { email, password } = req.body;

    const user = await prisma.user.findUnique({ where: { email } });
    if (!user || !(await bcrypt.compare(password, user.password))) {
      return res.status(401).json({ message: "Invalid email or password." });
    }

    const token = jwt.sign({ email: user.email }, process.env.JWT_SECRET, {
      expiresIn: "1d"
    });

    res.json({ token });
  } catch (error) {
    console.error("Login error:", error);
    res.status(500).json({ message: "Server error during login." });
  }
});

// Routes
app.use("/api/download", downloadRoutes);

// Start the server
const PORT = process.env.PORT || 5000;
app.listen(PORT, () => console.log(`Server running on port ${PORT}`));