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

// const app = express();

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

// // In-memory data store for demonstration
// let attributesData = {
//   attributes: [],
// };

// // CREATE - Add or update attributes
// app.post("/attributes", (req, res) => {
//   const { attributes } = req.body;

//   if (!attributes || !Array.isArray(attributes)) {
//     return res.status(400).json({ error: "Attributes must be an array" });
//   }

//   for (const attribute of attributes) {
//     if (!attribute.key || !attribute.value) {
//       return res.status(400).json({
//         error: "Each attribute must have a 'key' and 'value'",
//       });
//     }

//     // Check if the attribute already exists; if yes, update it
//     const existingIndex = attributesData.attributes.findIndex(
//       (item) => item.key === attribute.key
//     );
//     if (existingIndex !== -1) {
//       attributesData.attributes[existingIndex].value = attribute.value;
//     } else {
//       // Add new attribute
//       attributesData.attributes.push(attribute);
//     }
//   }

//   res.status(201).json({
//     message: "Attributes updated successfully",
//     attributes: attributesData.attributes,
//   });
// });

// // READ - Get all attributes
// app.get("/attributes", (req, res) => {
//   res.json({
//     message: "Attributes retrieved successfully",
//     attributes: attributesData.attributes,
//   });
// });

// // READ - Get a specific attribute by key
// app.get("/attributes/:key", (req, res) => {
//   const { key } = req.params;

//   const attribute = attributesData.attributes.find(
//     (item) => item.key === key
//   );

//   if (!attribute) {
//     return res.status(404).json({ error: `Attribute with key '${key}' not found` });
//   }

//   res.json({
//     message: "Attribute retrieved successfully",
//     attribute,
//   });
// });

// // UPDATE - Update a specific attribute by key
// app.put("/attributes/:key", (req, res) => {
//   const { key } = req.params;
//   const { value } = req.body;

//   if (!value) {
//     return res.status(400).json({ error: "Value is required to update the attribute" });
//   }

//   const attribute = attributesData.attributes.find(
//     (item) => item.key === key
//   );

//   if (!attribute) {
//     return res.status(404).json({ error: `Attribute with key '${key}' not found` });
//   }

//   // Update the value
//   attribute.value = value;

//   res.json({
//     message: "Attribute updated successfully",
//     attributes: attributesData.attributes,
//   });
// });

// // DELETE - Remove a specific attribute by key
// app.delete("/attributes/:key", (req, res) => {
//   const { key } = req.params;

//   const index = attributesData.attributes.findIndex(
//     (item) => item.key === key
//   );

//   if (index === -1) {
//     return res.status(404).json({ error: `Attribute with key '${key}' not found` });
//   }

//   // Remove the attribute
//   attributesData.attributes.splice(index, 1);

//   res.json({
//     message: "Attribute deleted successfully",
//     attributes: attributesData.attributes,
//   });
// });

// // Export app for serverless deployment
// module.exports = app;


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

const app = express();
const PORT = 8080;

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

// In-memory data store for demonstration
let cartData = {
  cart: {},
};

// CREATE - Add or update cart items
app.post("/cart", (req, res) => {
  const { cart } = req.body;

  if (!cart || !cart.product || !cart.id) {
    return res.status(400).json({ error: "Product and ID are required" });
  }

  // Add or update the cart item using the id as the key
  cartData.cart[cart.id] = {
    product: cart.product,
    id: cart.id,
  };

  res.status(201).json({
    message: "Cart updated successfully",
    cart: cartData,
  });
});

// READ - Get the entire cart
app.get("/cart", (req, res) => {
  res.json({
    message: "Cart retrieved successfully",
    cart: cartData,
  });
});

// READ - Get a specific item in the cart by id
app.get("/cart/:id", (req, res) => {
  const { id } = req.params;

  const item = cartData.cart[id];

  if (!item) {
    return res.status(404).json({ error: `Item with id '${id}' not found` });
  }

  res.json({
    message: "Item retrieved successfully",
    item: { [id]: item },
  });
});

// UPDATE - Update a specific item in the cart by id
app.put("/cart/:id", (req, res) => {
  const { id } = req.params;
  const { product } = req.body;

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

  if (!cartData.cart[id]) {
    return res.status(404).json({ error: `Item with id '${id}' not found` });
  }

  // Update the item
  cartData.cart[id].product = product;

  res.json({
    message: "Item updated successfully",
    cart: cartData,
  });
});

// DELETE - Remove a specific item from the cart by id
app.delete("/cart/:id", (req, res) => {
  const { id } = req.params;

  if (!cartData.cart[id]) {
    return res.status(404).json({ error: `Item with id '${id}' not found` });
  }

  // Delete the item
  delete cartData.cart[id];

  res.json({
    message: "Item deleted successfully",
    cart: cartData,
  });
});

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