import React from 'react';

function Pagination({ numOfItems, itemsPerPage = 10, currentPage, onPageChange }) {
  const totalPages = Math.ceil(numOfItems / itemsPerPage);
  const pages = Array.from({ length: totalPages }, (_, index) => index + 1);
  const maxPageButtons = 5; // Maximum number of page buttons to display

  const handlePrevious = () => {
    if (currentPage > 1) onPageChange(currentPage - 1);
  };

  const handleNext = () => {
    if (currentPage < totalPages) onPageChange(currentPage + 1);
  };

  const getPageButtons = () => {
    if (totalPages <= maxPageButtons) {
      return pages;
    }

    const half = Math.floor(maxPageButtons / 2);
    let start = Math.max(1, currentPage - half);
    let end = Math.min(totalPages, currentPage + half);

    if (currentPage <= half) {
      end = maxPageButtons;
    } else if (currentPage + half >= totalPages) {
      start = totalPages - maxPageButtons + 1;
    }

    return Array.from({ length: end - start + 1 }, (_, index) => start + index);
  };

  return (
    <div className="flex items-center justify-between border-t border-gray-200 bg-white px-4 py-3 sm:px-6">
      <div className="flex flex-1 justify-between sm:hidden">
        <button
          type='button'
          onClick={handlePrevious}
          className="relative inline-flex items-center rounded-md border border-gray-300 bg-white px-4 py-2 text-sm font-medium text-gray-700 hover:bg-gray-50"
          disabled={currentPage === 1}
        >
          Previous
        </button>
        <button
          type='button'
          onClick={handleNext}
          className="relative ml-3 inline-flex items-center rounded-md border border-gray-300 bg-white px-4 py-2 text-sm font-medium text-gray-700 hover:bg-gray-50"
          disabled={currentPage === totalPages}
        >
          Next
        </button>
      </div>

      <div className="hidden sm:flex sm:flex-1 sm:items-center sm:justify-between">
        <div>
          <p className="text-sm text-gray-700">
            Showing <span className="font-medium">{(currentPage - 1) * itemsPerPage + 1}</span> to <span className="font-medium">{Math.min(currentPage * itemsPerPage, numOfItems)}</span> of <span className="font-medium">{numOfItems}</span> applications
          </p>
        </div>
        <div>
          <nav className="isolate inline-flex -space-x-px rounded-md shadow-sm" aria-label="Pagination">
            <button
              type='button'
              onClick={handlePrevious}
              className="relative inline-flex items-center rounded-l-md px-2 py-2 text-gray-400 ring-1 ring-inset ring-gray-300 hover:bg-gray-50 focus:z-20 focus:outline-offset-0"
              disabled={currentPage === 1}
            >
              <span className="sr-only">Previous</span>
              <svg className="h-5 w-5" viewBox="0 0 20 20" fill="currentColor" aria-hidden="true">
                <path fillRule="evenodd" d="M11.78 5.22a.75.75 0 0 1 0 1.06L8.06 10l3.72 3.72a.75.75 0 1 1-1.06 1.06l-4.25-4.25a.75.75 0 0 1 0-1.06l4.25-4.25a.75.75 0 0 1 1.06 0Z" clipRule="evenodd" />
              </svg>
            </button>

            {getPageButtons().map(page => (
              <button
                type='button'
                key={page}
                onClick={() => onPageChange(page)}
                aria-current={currentPage === page ? 'page' : undefined}
                className={`relative inline-flex items-center px-4 py-2 text-sm font-semibold ${currentPage === page ? 'bg-red-700 text-white' : 'text-gray-900 ring-1 ring-inset ring-gray-300 hover:bg-gray-50'} focus:z-20 focus:outline-offset-0`}
              >
                {page}
              </button>
            ))}

            <button
              type='button'
              onClick={handleNext}
              className="relative inline-flex items-center rounded-r-md px-2 py-2 text-gray-400 ring-1 ring-inset ring-gray-300 hover:bg-gray-50 focus:z-20 focus:outline-offset-0"
              disabled={currentPage === totalPages}
            >
              <span className="sr-only">Next</span>
              <svg className="h-5 w-5" viewBox="0 0 20 20" fill="currentColor" aria-hidden="true">
                <path fillRule="evenodd" d="M8.22 5.22a.75.75 0 0 1 1.06 0l4.25 4.25a.75.75 0 0 1 0 1.06l-4.25 4.25a.75.75 0 0 1-1.06-1.06L11.94 10 8.22 6.28a.75.75 0 0 1 0-1.06Z" clipRule="evenodd" />
              </svg>
            </button>
          </nav>
        </div>
      </div>
    </div>
  );
}

export default Pagination;
