//console.log("Hello, World!");
const express = require('express');
const mongoose = require('mongoose');
const app = express();
const PORT = 3000;

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

// Connect to MongoDB
mongoose.connect('mongodb://localhost:27017/bookDB', {
  useNewUrlParser: true,
  useUnifiedTopology: true,
});

// Define the Book schema
const bookSchema = new mongoose.Schema({
  title: String,
  author: String,
  summary: String,
});

const Book = mongoose.model('Book', bookSchema);

// Routes
// Add your routes for CRUD operations here
// Create a new book
app.post('/books', async (req, res) => {
    const { title, author, summary } = req.body;
    try {
      const book = await Book.create({ title, author, summary });
      res.status(201).json(book);
    } catch (error) {
      res.status(500).json({ error: 'Could not create book' });
    }
  });
  
  // Get all books
  app.get('/books', async (req, res) => {
    try {
      const books = await Book.find();
      res.json(books);
    } catch (error) {
      res.status(500).json({ error: 'Could not retrieve books' });
    }
  });
  
  // Get a specific book by ID
  app.get('/books/:id', async (req, res) => {
    const { id } = req.params;
    try {
      const book = await Book.findById(id);
      res.json(book);
    } catch (error) {
      res.status(404).json({ error: 'Book not found' });
    }
  });
  
  // Update a book by ID
  app.put('/books/:id', async (req, res) => {
    const { id } = req.params;
    const { title, author, summary } = req.body;
    try {
      const book = await Book.findByIdAndUpdate(id, { title, author, summary }, { new: true });
      res.json(book);
    } catch (error) {
      res.status(404).json({ error: 'Book not found' });
    }
  });
  
  // Delete a book by ID
  app.delete('/books/:id', async (req, res) => {
    const { id } = req.params;
    try {
      await Book.findByIdAndRemove(id);
      res.json({ message: 'Book deleted successfully' });
    } catch (error) {
      res.status(404).json({ error: 'Book not found' });
    }
  });
  

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