import { type ReactNode } from 'react'

export interface Column<T> {
  header: string
  accessor: (row: T) => ReactNode
  className?: string
}

interface AdminTableProps<T> {
  columns: Column<T>[]
  data: T[]
  isLoading?: boolean
  emptyMessage?: string
  onRowClick?: (row: T) => void
  keyFn: (row: T) => string | number
}

export function AdminTable<T>({
  columns,
  data,
  isLoading,
  emptyMessage = 'No data found.',
  onRowClick,
  keyFn,
}: AdminTableProps<T>) {
  if (isLoading) {
    return (
      <div className="text-center py-8 text-gray-500 dark:text-gray-400">
        Loading...
      </div>
    )
  }

  if (data.length === 0) {
    return (
      <div className="text-center py-8 text-gray-500 dark:text-gray-400">
        {emptyMessage}
      </div>
    )
  }

  return (
    <div className="overflow-x-auto">
      <table className="min-w-full divide-y divide-gray-200 dark:divide-gray-700">
        <thead className="bg-gray-50 dark:bg-gray-800">
          <tr>
            {columns.map((col) => (
              <th
                key={col.header}
                className={`px-4 py-3 text-left text-xs font-medium text-gray-500 dark:text-gray-400 uppercase tracking-wider ${col.className ?? ''}`}
              >
                {col.header}
              </th>
            ))}
          </tr>
        </thead>
        <tbody className="bg-white dark:bg-gray-900 divide-y divide-gray-200 dark:divide-gray-700">
          {data.map((row) => (
            <tr
              key={keyFn(row)}
              onClick={onRowClick ? () => onRowClick(row) : undefined}
              className={onRowClick ? 'cursor-pointer hover:bg-gray-50 dark:hover:bg-gray-800' : ''}
            >
              {columns.map((col) => (
                <td
                  key={col.header}
                  className={`px-4 py-3 text-sm whitespace-nowrap ${col.className ?? ''}`}
                >
                  {col.accessor(row)}
                </td>
              ))}
            </tr>
          ))}
        </tbody>
      </table>
    </div>
  )
}