import { Request, Response } from 'express';
import { Cart, ICart, Order } from '../mongoose/Schema.test';
import { config } from 'dotenv';

config();

export async function addToCart(req: Request, res: Response) {
  try {
    const { userId, productId } = req.body;
    if (!productId) {
      res.status(400).json({ error: 'Product id is required.' });
      return;
    }
    let cart: ICart | null = await Cart.findOne({ userId });
    if (!cart) {
      cart = await Cart.create({
        userId,
        products: { [productId]: 1 },
      });
    } else {
      const currentQuantity = cart.products[productId];
      if (currentQuantity === undefined) {
        cart.products[productId] = 1;
      } else {
        cart.products[productId] += 1;
      }
      cart.markModified('products');
    }

    await cart.save();
    res.status(200).json(cart);
  } catch (error) {
    console.error('Error adding product to cart:', error);
    res.status(500).json({ error: 'An error occurred while adding the product to the cart.' });
  }
}

export async function listCart(req: Request, res: Response) {
  try {
    const { userId } = req.body;
    const cart = await Cart.findOne({ userId });
    if (!cart) {
      res.status(404).json({ error: 'Cart not found.' });
      return;
    }
    res.status(200).json(cart.products);
  } catch (error) {
    console.error('Error listing cart:', error);
    res.status(500).json({ error: 'An error occurred while listing the cart.' });
  }
}

export async function checkout(req: Request, res: Response) {

  const { userId } = req.body;
  const usersCart = await Cart.findOne({ userId });

  if (!usersCart) {
    res.status(404).json({ error: 'Cart not found.' });
    return;
  }

  const order = await Order.create({
    userId,
    products: usersCart.products,
  });

  await removeCart(userId);
  // sendEmailasync(order.id, userId);
  res.status(200).json(order);
}

async function removeCart(userId: string) {
  await Cart.deleteOne({ userId });
}