import { ReactNode } from 'react';
import './DataTable.css';

interface Column<T> {
  key: string;
  header: string;
  render: (item: T) => ReactNode;
  className?: string;
  sortable?: boolean;
}

interface DataTableProps<T> {
  data: T[];
  columns: Column<T>[];
  keyExtractor: (item: T) => string;
  emptyMessage?: string;
  className?: string;
  onSort?: (key: string) => void;
  sortKey?: string;
  sortOrder?: 'asc' | 'desc';
}

export function DataTable<T>({
  data,
  columns,
  keyExtractor,
  emptyMessage = 'No data available',
  className = '',
  onSort,
  sortKey,
  sortOrder,
}: DataTableProps<T>) {
  if (data.length === 0) {
    return (
      <div className="data-table__empty">
        <p>{emptyMessage}</p>
      </div>
    );
  }

  return (
    <div className={`data-table ${className}`.trim()}>
      <table>
        <thead>
          <tr>
            {columns.map((column) => (
              <th
                key={column.key}
                className={`${column.className || ''} ${column.sortable ? 'data-table__th--sortable' : ''}`}
                onClick={() => column.sortable && onSort?.(column.key)}
              >
                <span className="data-table__th-content">
                  {column.header}
                  {column.sortable && sortKey === column.key && (
                    <svg
                      className={`data-table__sort-icon ${sortOrder === 'desc' ? 'data-table__sort-icon--desc' : ''}`}
                      width="12"
                      height="12"
                      viewBox="0 0 24 24"
                      fill="none"
                      stroke="currentColor"
                      strokeWidth="2"
                    >
                      <polyline points="18 15 12 9 6 15" />
                    </svg>
                  )}
                </span>
              </th>
            ))}
          </tr>
        </thead>
        <tbody>
          {data.map((item) => (
            <tr key={keyExtractor(item)}>
              {columns.map((column) => (
                <td key={column.key} className={column.className}>
                  {column.render(item)}
                </td>
              ))}
            </tr>
          ))}
        </tbody>
      </table>
    </div>
  );
}