import React from 'react';
import { ChevronLeft, ChevronRight } from 'lucide-react';

interface PaginationProps {
  currentPage: number;
  totalPages: number;
  onPageChange: (page: number) => void;
  totalItems?: number;
  itemsPerPage?: number;
}

const Pagination: React.FC<PaginationProps> = ({
  currentPage,
  totalPages,
  onPageChange,
  totalItems,
  itemsPerPage = 5,
}) => {
  if (totalPages <= 1) return null;

  const getPageNumbers = () => {
    const pages: (number | string)[] = [];
    const maxVisiblePages = 5;

    if (totalPages <= maxVisiblePages) {
      for (let i = 1; i <= totalPages; i++) {
        pages.push(i);
      }
    } else {
      if (currentPage <= 3) {
        for (let i = 1; i <= 4; i++) {
          pages.push(i);
        }
        pages.push('...');
        pages.push(totalPages);
      } else if (currentPage >= totalPages - 2) {
        pages.push(1);
        pages.push('...');
        for (let i = totalPages - 3; i <= totalPages; i++) {
          pages.push(i);
        }
      } else {
        pages.push(1);
        pages.push('...');
        for (let i = currentPage - 1; i <= currentPage + 1; i++) {
          pages.push(i);
        }
        pages.push('...');
        pages.push(totalPages);
      }
    }

    return pages;
  };

  const startItem = (currentPage - 1) * itemsPerPage + 1;
  const endItem = Math.min(currentPage * itemsPerPage, totalItems || 0);

  return (
    <div className="flex items-center justify-between border-t border-gray-200 bg-white px-4 py-3 sm:px-6">
      {/* Mobile */}
      <div className="flex flex-1 justify-between sm:hidden">
        <button
          onClick={() => onPageChange(currentPage - 1)}
          disabled={currentPage === 1}
          className={`relative inline-flex items-center rounded-md border border-gray-300 bg-white px-4 py-2 text-sm font-medium ${
            currentPage === 1
              ? 'text-gray-400 cursor-not-allowed'
              : 'text-gray-700 hover:bg-gray-50'
          }`}
        >
          Trước
        </button>
        <button
          onClick={() => onPageChange(currentPage + 1)}
          disabled={currentPage === totalPages}
          className={`relative ml-3 inline-flex items-center rounded-md border border-gray-300 bg-white px-4 py-2 text-sm font-medium ${
            currentPage === totalPages
              ? 'text-gray-400 cursor-not-allowed'
              : 'text-gray-700 hover:bg-gray-50'
          }`}
        >
          Sau
        </button>
      </div>

      {/* Desktop */}
      <div className="hidden sm:flex sm:flex-1 sm:items-center sm:justify-between">
        <div>
          <p className="text-sm text-gray-700">
            Hiển thị{' '}
            <span className="font-medium">{startItem}</span> đến{' '}
            <span className="font-medium">{endItem}</span> trong tổng số{' '}
            <span className="font-medium">{totalItems || 0}</span> kết quả
          </p>
        </div>
        <div>
          <nav className="isolate inline-flex -space-x-px rounded-md shadow-sm" aria-label="Pagination">
            {/* Previous Button */}
            <button
              onClick={() => onPageChange(currentPage - 1)}
              disabled={currentPage === 1}
              className={`relative inline-flex items-center rounded-l-md px-2 py-2 text-gray-400 ring-1 ring-inset ring-gray-300 ${
                currentPage === 1
                  ? 'cursor-not-allowed bg-gray-100'
                  : 'hover:bg-gray-50 focus:z-20 focus:outline-offset-0'
              }`}
            >
              <span className="sr-only">Previous</span>
              <ChevronLeft className="h-5 w-5" aria-hidden="true" />
            </button>

            {/* Page Numbers */}
            {getPageNumbers().map((page, index) => {
              if (page === '...') {
                return (
                  <span
                    key={`ellipsis-${index}`}
                    className="relative inline-flex items-center px-4 py-2 text-sm font-semibold text-gray-700 ring-1 ring-inset ring-gray-300"
                  >
                    ...
                  </span>
                );
              }

              const pageNum = page as number;
              return (
                <button
                  key={pageNum}
                  onClick={() => onPageChange(pageNum)}
                  className={`relative inline-flex items-center px-4 py-2 text-sm font-semibold ${
                    currentPage === pageNum
                      ? 'z-10 bg-blue-600 text-white focus:z-20 focus-visible:outline focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-blue-600'
                      : 'text-gray-900 ring-1 ring-inset ring-gray-300 hover:bg-gray-50 focus:z-20 focus:outline-offset-0'
                  }`}
                >
                  {pageNum}
                </button>
              );
            })}

            {/* Next Button */}
            <button
              onClick={() => onPageChange(currentPage + 1)}
              disabled={currentPage === totalPages}
              className={`relative inline-flex items-center rounded-r-md px-2 py-2 text-gray-400 ring-1 ring-inset ring-gray-300 ${
                currentPage === totalPages
                  ? 'cursor-not-allowed bg-gray-100'
                  : 'hover:bg-gray-50 focus:z-20 focus:outline-offset-0'
              }`}
            >
              <span className="sr-only">Next</span>
              <ChevronRight className="h-5 w-5" aria-hidden="true" />
            </button>
          </nav>
        </div>
      </div>
    </div>
  );
};

export default Pagination;
