'use client';

import React, { useState } from 'react';

export interface Product {
  _id: string;
  code: string;
  name: string;
  category: string;
  subcategory: string;
  quantity: number;
  unit: string;
  unitPrice: number;
  vat: number;
  supplier: string;
  createdAt: string;
  updatedAt: string;
}

interface ProductTableProps {
  products: Product[];
}

export default function ProductTable({ products }: ProductTableProps) {
  const [selectedProducts, setSelectedProducts] = useState<Set<string>>(new Set());

  const toggleProduct = (id: string) => {
    const newSelected = new Set(selectedProducts);
    if (newSelected.has(id)) {
      newSelected.delete(id);
    } else {
      newSelected.add(id);
    }
    setSelectedProducts(newSelected);
  };

  const toggleAll = () => {
    if (selectedProducts.size === products.length) {
      setSelectedProducts(new Set());
    } else {
      setSelectedProducts(new Set(products.map(p => p._id)));
    }
  };

  const calculateNetPrice = (unitPrice: number, vat: number) => {
    return unitPrice * (1 + vat / 100);
  };

  return (
    <>
      {/* Desktop & Tablet Table View */}
      <div className="hidden md:block bg-white rounded-lg border border-gray-200 overflow-hidden">
        <div className="overflow-x-auto">
          <table className="w-full">
            <thead>
              <tr className="bg-gray-50 border-b border-gray-200">
                <th className="px-4 lg:px-6 py-3 text-left">
                  <input
                    type="checkbox"
                    checked={selectedProducts.size === products.length && products.length > 0}
                    onChange={toggleAll}
                    className="w-4 h-4 rounded border-gray-300 text-blue-600 focus:ring-blue-500"
                  />
                </th>
                <th className="px-4 lg:px-6 py-3 text-left text-xs font-semibold text-gray-600 uppercase tracking-wider">
                  Product
                </th>
                <th className="hidden lg:table-cell px-6 py-3 text-left text-xs font-semibold text-gray-600 uppercase tracking-wider">
                  Category
                </th>
                <th className="hidden xl:table-cell px-6 py-3 text-left text-xs font-semibold text-gray-600 uppercase tracking-wider">
                  Subcategory
                </th>
                <th className="px-4 lg:px-6 py-3 text-left text-xs font-semibold text-gray-600 uppercase tracking-wider">
                  Quantity
                </th>
                <th className="hidden lg:table-cell px-6 py-3 text-left text-xs font-semibold text-gray-600 uppercase tracking-wider">
                  Unit Price
                </th>
                <th className="hidden xl:table-cell px-6 py-3 text-left text-xs font-semibold text-gray-600 uppercase tracking-wider">
                  VAT
                </th>
                <th className="px-4 lg:px-6 py-3 text-left text-xs font-semibold text-gray-600 uppercase tracking-wider">
                  Net Price
                </th>
                <th className="hidden lg:table-cell px-6 py-3 text-left text-xs font-semibold text-gray-600 uppercase tracking-wider">
                  Supplier
                </th>
                <th className="px-4 lg:px-6 py-3 text-left text-xs font-semibold text-gray-600 uppercase tracking-wider">
                  Actions
                </th>
              </tr>
            </thead>
            <tbody className="divide-y divide-gray-200">
              {products.map((product) => (
                <tr key={product._id} className="hover:bg-gray-50 transition-colors">
                  <td className="px-4 lg:px-6 py-4">
                    <input
                      type="checkbox"
                      checked={selectedProducts.has(product._id)}
                      onChange={() => toggleProduct(product._id)}
                      className="w-4 h-4 rounded border-gray-300 text-blue-600 focus:ring-blue-500"
                    />
                  </td>
                  <td className="px-4 lg:px-6 py-4">
                    <div>
                      <p className="text-sm font-medium text-gray-900">{product.name}</p>
                      <p className="text-xs text-gray-500">ID: {product.code}</p>
                      <p className="text-xs text-gray-500 lg:hidden mt-1">
                        {product.category} • {product.quantity} {product.unit}
                      </p>
                    </div>
                  </td>
                  <td className="hidden lg:table-cell px-6 py-4 text-sm text-gray-700">{product.category}</td>
                  <td className="hidden xl:table-cell px-6 py-4 text-sm text-gray-700">{product.subcategory}</td>
                  <td className="px-4 lg:px-6 py-4 text-sm text-gray-700">
                    {product.quantity} {product.unit}
                  </td>
                  <td className="hidden lg:table-cell px-6 py-4 text-sm text-gray-700">€{product.unitPrice.toFixed(2)}</td>
                  <td className="hidden xl:table-cell px-6 py-4 text-sm text-gray-700">{product.vat}%</td>
                  <td className="px-4 lg:px-6 py-4 text-sm font-bold text-gray-900">
                    €{calculateNetPrice(product.unitPrice, product.vat).toFixed(2)}
                  </td>
                  <td className="hidden lg:table-cell px-6 py-4">
                    <a href="#" className="text-sm text-blue-600 hover:text-blue-800 font-medium">
                      {product.supplier}
                    </a>
                  </td>
                  <td className="px-4 lg:px-6 py-4">
                    <button className="text-gray-400 hover:text-gray-600">
                      <svg className="w-5 h-5" fill="currentColor" viewBox="0 0 20 20">
                        <path d="M10 6a2 2 0 110-4 2 2 0 010 4zM10 12a2 2 0 110-4 2 2 0 010 4zM10 18a2 2 0 110-4 2 2 0 010 4z" />
                      </svg>
                    </button>
                  </td>
                </tr>
              ))}
            </tbody>
          </table>
        </div>
      </div>

      {/* Mobile Card View */}
      <div className="md:hidden space-y-4">
        {products.map((product) => (
          <div key={product._id} className="bg-white rounded-lg border border-gray-200 p-4">
            <div className="flex items-start gap-3">
              <input
                type="checkbox"
                checked={selectedProducts.has(product._id)}
                onChange={() => toggleProduct(product._id)}
                className="w-4 h-4 rounded border-gray-300 text-blue-600 focus:ring-blue-500 mt-1"
              />
              <div className="flex-1">
                <div className="flex items-start justify-between">
                  <div>
                    <h3 className="text-sm font-semibold text-gray-900">{product.name}</h3>
                    <p className="text-xs text-gray-500 mt-0.5">ID: {product.code}</p>
                  </div>
                  <button className="text-gray-400 hover:text-gray-600">
                    <svg className="w-5 h-5" fill="currentColor" viewBox="0 0 20 20">
                      <path d="M10 6a2 2 0 110-4 2 2 0 010 4zM10 12a2 2 0 110-4 2 2 0 010 4zM10 18a2 2 0 110-4 2 2 0 010 4z" />
                    </svg>
                  </button>
                </div>

                <div className="mt-3 grid grid-cols-2 gap-3">
                  <div>
                    <p className="text-xs text-gray-500">Category</p>
                    <p className="text-sm text-gray-900 mt-0.5">{product.category}</p>
                  </div>
                  <div>
                    <p className="text-xs text-gray-500">Subcategory</p>
                    <p className="text-sm text-gray-900 mt-0.5">{product.subcategory}</p>
                  </div>
                  <div>
                    <p className="text-xs text-gray-500">Quantity</p>
                    <p className="text-sm text-gray-900 mt-0.5">{product.quantity} {product.unit}</p>
                  </div>
                  <div>
                    <p className="text-xs text-gray-500">Unit Price</p>
                    <p className="text-sm text-gray-900 mt-0.5">€{product.unitPrice.toFixed(2)}</p>
                  </div>
                  <div>
                    <p className="text-xs text-gray-500">VAT</p>
                    <p className="text-sm text-gray-900 mt-0.5">{product.vat}%</p>
                  </div>
                  <div>
                    <p className="text-xs text-gray-500">Net Price</p>
                    <p className="text-sm font-bold text-gray-900 mt-0.5">
                      €{calculateNetPrice(product.unitPrice, product.vat).toFixed(2)}
                    </p>
                  </div>
                </div>

                <div className="mt-3 pt-3 border-t border-gray-200 flex items-center justify-between">
                  <div>
                    <p className="text-xs text-gray-500">Supplier</p>
                    <a href="#" className="text-sm text-blue-600 hover:text-blue-800 font-medium">
                      {product.supplier}
                    </a>
                  </div>
                  <div className="text-right">
                    <p className="text-xs text-gray-500">Updated</p>
                    <p className="text-xs text-gray-700 mt-0.5">{new Date(product.updatedAt).toLocaleDateString()}</p>
                  </div>
                </div>
              </div>
            </div>
          </div>
        ))}
      </div>
    </>
  );
}