import { Request, Response } from 'express';
import { Product, IProduct } from '../mongoose/Schema';

export async function createProduct(req: Request, res: Response) {
  try {
    const { name, description, price, userId } = req.body;
    if(!name || !description || !price || !userId) {
      res.status(400).json({ error: 'Name, description, price are required.' });
      return;
    }
    
    const productExists = await Product.exists({ name, userId });
    if(productExists) {
      res.status(400).json({ error: 'Product already exists.' });
      return;
    }
    const product: IProduct = await Product.create({
      name,
      description,
      price,
      userId: userId,
    });

    res.status(201).json(product);
  } catch (error) {
    console.error('Error creating product:', error);
    res.status(500).json({ error: 'An error occurred while creating the product.' });
  }
}

export async function listProducts(req: Request, res: Response) {
  try {
    const { page, limit } = req.query;
    const dbPage = Number(page) || 0;
    const dbLimit = Number(limit) || 50;
    const products = await Product.find().sort({ price: 1 }).skip(Number(dbPage) * Number(dbLimit)).limit(Number(dbLimit));

    res.json(products);
  } catch (error) {
    console.error('Error listing products:', error);
    res.status(500).json({ error: 'An error occurred while listing the products.' });
  }
}

export async function getProduct(req: Request, res: Response) {
  const { id } = req.params;
  try {
    const product = await Product.findById(id);
    if(!product) {
      res.status(404).json({ error: 'Product not found.' });
      return;
    }
    res.json(product);
  } catch (error) {
    console.error('Error getting product:', error);
    res.status(404).json({ error: 'Product not found.' });
  }
}