server.js

// server.js
const express = require('express');
const mongoose = require('mongoose');
const app = express();
const PORT = process.env.PORT || 3000;
const MONGO_URI = process.env.MONGO_URI || 'mongodb://host.docker.internal:27017/myapp';

// Middleware
app.use(express.json());

// MongoDB Connection
mongoose.connect(MONGO_URI)
  .then(() => console.log('Connected to MongoDB'))
  .catch(err => console.error('MongoDB connection error:', err));

// Define a simple schema and model
const ItemSchema = new mongoose.Schema({
  name: { type: String, required: true },
  description: String,
  createdAt: { type: Date, default: Date.now }
});

const Item = mongoose.model('Item', ItemSchema);

// Basic route
app.get('/', (req, res) => {
  res.json({ message: 'Welcome to the Express API with MongoDB!' });
});

// GET all items
app.get('/api/items', async (req, res) => {
  try {
    const items = await Item.find();
    res.json(items);
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

// GET single item
app.get('/api/items/:id', async (req, res) => {
  try {
    const item = await Item.findById(req.params.id);
    if (!item) return res.status(404).json({ error: 'Item not found' });
    res.json(item);
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

// POST create item
app.post('/api/items', async (req, res) => {
  try {
    const item = new Item(req.body);
    await item.save();
    res.status(201).json(item);
  } catch (err) {
    res.status(400).json({ error: err.message });
  }
});

// PUT update item
app.put('/api/items/:id', async (req, res) => {
  try {
    const item = await Item.findByIdAndUpdate(req.params.id, req.body, { new: true });
    if (!item) return res.status(404).json({ error: 'Item not found' });
    res.json(item);
  } catch (err) {
    res.status(400).json({ error: err.message });
  }
});

// DELETE item
app.delete('/api/items/:id', async (req, res) => {
  try {
    const item = await Item.findByIdAndDelete(req.params.id);
    if (!item) return res.status(404).json({ error: 'Item not found' });
    res.json({ message: 'Item deleted successfully' });
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

// Start server
app.listen(PORT, '0.0.0.0', () => {
  console.log(`Server is running on http://localhost:${PORT}`);
});