// const express = require("express");
// const bodyParser = require("body-parser");

// const app = express();
// const PORT = 3000;

// // Middleware to parse JSON
// app.use(bodyParser.json());

// // In-memory data store
// let items = [];
// let currentId = 1;

// // Routes

// // CREATE - Add a new item
// app.post("/items", (req, res) => {
//   const { name, description } = req.body;

//   if (!name) {
//     return res.status(400).json({ error: "Name is required" });
//   }

//   const newItem = { id: currentId++, name, description };
//   items.push(newItem);
//   res.status(201).json(newItem);
// });

// // READ - Get all items
// app.get("/items", (req, res) => {
//   res.json(items);
// });

// // READ - Get item by ID
// app.get("/items/:id", (req, res) => {
//   const { id } = req.params;
//   const item = items.find((i) => i.id === parseInt(id));

//   if (!item) {
//     return res.status(404).json({ error: "Item not found" });
//   }

//   res.json(item);
// });

// // UPDATE - Update item by ID
// app.put("/items/:id", (req, res) => {
//   const { id } = req.params;
//   const { name, description } = req.body;

//   const item = items.find((i) => i.id === parseInt(id));
//   if (!item) {
//     return res.status(404).json({ error: "Item not found" });
//   }

//   if (name) item.name = name;
//   if (description) item.description = description;

//   res.json(item);
// });

// // DELETE - Remove item by ID
// app.delete("/items/:id", (req, res) => {
//   const { id } = req.params;
//   const itemIndex = items.findIndex((i) => i.id === parseInt(id));

//   if (itemIndex === -1) {
//     return res.status(404).json({ error: "Item not found" });
//   }

//   items.splice(itemIndex, 1);
//   res.status(204).send();
// });

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

const express = require("express");
const bodyParser = require("body-parser");

const app = express();

// Middleware to parse JSON
app.use(bodyParser.json());

// In-memory data store with initial items
let items = [
  { id: 1, name: "Item 1", description: "This is the first item." },
  { id: 2, name: "Item 2", description: "This is the second item." },
  { id: 3, name: "Item 3", description: "This is the third item." },
];
let currentId = 4; // Next ID will start from 4

// Routes

// CREATE - Add a new item
app.post("/items", (req, res) => {
  const { name, description } = req.body;

  if (!name) {
    return res.status(400).json({ error: "Name is required" });
  }

  const newItem = { id: currentId++, name, description };
  items.push(newItem);
  res.status(201).json(newItem);
});

// READ - Get all items
app.get("/items", (req, res) => {
  res.json(items);
});

// READ - Get item by ID
app.get("/items/:id", (req, res) => {
  const { id } = req.params;
  const item = items.find((i) => i.id === parseInt(id));

  if (!item) {
    return res.status(404).json({ error: "Item not found" });
  }

  res.json(item);
});

// UPDATE - Update item by ID
app.put("/items/:id", (req, res) => {
  const { id } = req.params;
  const { name, description } = req.body;

  const item = items.find((i) => i.id === parseInt(id));
  if (!item) {
    return res.status(404).json({ error: "Item not found" });
  }

  if (name) item.name = name;
  if (description) item.description = description;

  res.json(item);
});

// DELETE - Remove item by ID
app.delete("/items/:id", (req, res) => {
  const { id } = req.params;
  const itemIndex = items.findIndex((i) => i.id === parseInt(id));

  if (itemIndex === -1) {
    return res.status(404).json({ error: "Item not found" });
  }

  items.splice(itemIndex, 1);
  res.status(204).send();
});

// Start server
const PORT = 8080;
app.listen(PORT, () => {
  console.log(`Server is running on http://localhost:${PORT}`);
});