server.js

const express = require('express');
const mongoose = require('mongoose');
const cors = require('cors');
require('dotenv').config();

const app = express();
app.use(cors());
app.use(express.json());

const Task = mongoose.model('Task', new mongoose.Schema({
  title: String,
  completed: Boolean
}));

app.get('/tasks', async (req, res) => {
  const tasks = await Task.find();
  res.json(tasks);
});

app.post('/tasks', async (req, res) => {
  const task = new Task({ title: req.body.title, completed: false });
  await task.save();
  res.json(task);
});

app.put('/tasks/:id', async (req, res) => {
  const task = await Task.findByIdAndUpdate(req.params.id, { completed: true }, { new: true });
  res.json(task);
});

app.delete('/tasks/:id', async (req, res) => {
  await Task.findByIdAndDelete(req.params.id);
  res.json({ success: true });
});

mongoose.connect(process.env.MONGO_URI).then(() => {
  app.listen(5000, () => console.log("Backend running on http://localhost:5000"));
});