server.js

/* eslint-disable no-unused-vars */
import express from "express";
import { PORT } from "./config/env.js";
import connectToDatabase from "./database/mongodb.js";
import userRouter from "./routes/users.routes.js";
import tasksRouter from "./routes/tasks.routes.js";

const app = express();
const port = PORT;

// Simple CORS (you can also use the 'cors' package)
app.use((req, res, next) => {
  res.header("Access-Control-Allow-Origin", "*");
  res.header(
    "Access-Control-Allow-Headers",
    "X-Requested-With, X-HTTP-Method-Override, Content-Type, Accept"
  );
  res.header("Access-Control-Allow-Methods", "POST, GET, PUT, DELETE, OPTIONS");
  next();
});

// Parsers
app.use(express.json());
app.use(express.urlencoded({ extended: true }));
app.use("/api/users", userRouter);
app.use("/api/tasks", tasksRouter);

// https://expressjs.com/en/guide/error-handling.html
app.use((err, req, res, _next) => {
  const isValidation =
    err.name === "ValidationError" ||
    err.code === 11000 || // duplicate key
    err.statusCode === 400;
  const status = isValidation ? 400 : err.statusCode || 500;
  const message =
    err.code === 11000
      ? "Duplicate key (likely email already exists)"
      : err.message || "Server error";
  res.status(status).json({ message, data: null });
});

app.listen(port, async () => {
  await connectToDatabase();
  console.log(`Server running on http://localhost:${port}`);
});

export default app;