// controllers/productController.js
import Product from '../models/Product.js';

// @desc    Create a new product & upload images
// @route   POST /api/products
export const createProduct = async (req, res) => {
  try {
    // 1. Extract text data from the request body
    const { name, price, description, fabric, category, subcategory } = req.body;
    
    // sizes might come as a stringified array or single string depending on FormData, 
    // so we parse it safely.
    let sizesArray = [];
    if (req.body.sizes) {
      sizesArray = Array.isArray(req.body.sizes) ? req.body.sizes : req.body.sizes.split(',');
    }

    // 2. Extract uploaded image URLs from Cloudinary
    // req.files is populated by our Multer/Cloudinary middleware
    if (!req.files || req.files.length === 0) {
      return res.status(400).json({ message: 'At least one image is required' });
    }
    
    const imageUrls = req.files.map((file) => file.path);

    // 3. Create the product in MongoDB
    const product = new Product({
      name,
      price: Number(price),
      description,
      fabric,
      category,
      subcategory,
      sizes: sizesArray,
      images: imageUrls,
    });

    const savedProduct = await product.save();

    // 4. Send success response back to the frontend
    res.status(201).json({
      success: true,
      message: 'Product added to House of Ruqa catalog successfully',
      product: savedProduct
    });

  } catch (error) {
    console.error('Error creating product:', error);
    res.status(500).json({ success: false, message: 'Server Error', error: error.message });
  }
};

// @desc    Get all products (For the storefront grid)
// @route   GET /api/products
export const getProducts = async (req, res) => {
  try {
    // Optional filtering (e.g., /api/products?category=Women)
    const filter = req.query.category ? { category: req.query.category } : {};
    
    // Fetch from DB, newest first
    const products = await Product.find(filter).sort({ createdAt: -1 });
    
    res.status(200).json({ success: true, count: products.length, products });
  } catch (error) {
    res.status(500).json({ success: false, message: 'Server Error' });
  }
};

// @desc    Get single product by ID
// @route   GET /api/products/:id
export const getProductById = async (req, res) => {
  try {
    const product = await Product.findById(req.params.id);
    if (product) {
      res.status(200).json({ success: true, product });
    } else {
      res.status(404).json({ success: false, message: 'Product not found' });
    }
  } catch (error) {
    res.status(500).json({ success: false, message: 'Server Error' });
  }
};

// @desc    Update a product
// @route   PUT /api/products/:id
export const updateProduct = async (req, res) => {
  try {
    const { name, price, description, fabric, category, subcategory } = req.body;
    
    let sizesArray = [];
    if (req.body.sizes) {
      sizesArray = Array.isArray(req.body.sizes) ? req.body.sizes : req.body.sizes.split(',').map(s => s.trim());
    }

    // Find product and update (Note: For MVP, we are updating text/details. Image updates require a more complex Cloudinary sync)
    const updatedProduct = await Product.findByIdAndUpdate(
      req.params.id,
      {
        name,
        price: Number(price),
        description,
        fabric,
        category,
        subcategory,
        sizes: sizesArray,
      },
      { new: true, runValidators: true }
    );

    if (!updatedProduct) {
      return res.status(404).json({ success: false, message: 'Product not found' });
    }

    res.status(200).json({ success: true, product: updatedProduct, message: 'Product updated successfully' });
  } catch (error) {
    res.status(500).json({ success: false, message: 'Server Error updating product' });
  }
};

// @desc    Delete a product
// @route   DELETE /api/products/:id
export const deleteProduct = async (req, res) => {
  try {
    const product = await Product.findByIdAndDelete(req.params.id);
    
    if (!product) {
      return res.status(404).json({ success: false, message: 'Product not found' });
    }

    res.status(200).json({ success: true, message: 'Product deleted successfully' });
  } catch (error) {
    res.status(500).json({ success: false, message: 'Server Error deleting product' });
  }
};