import type { ReactNode } from "react";
import type { SortState } from "@/lib/types";

/*
 * Reduced from OnCo src/components/filters/ResultsTable.tsx
 * https://github.com/judegomila/OnCo @ b594d7433bf4e408b44215e25e5304696d6f840e
 * Copyright (c) 2026 OnCo. MIT License. See ui/NOTICE.
 *
 * The parent owns sorting. This table does not filter, resize, translate, or page.
 */

export type Column<T> = {
  key: string;
  label: string;
  render: (row: T) => ReactNode;
  sortable?: boolean;
};

export function ResultsTable<T>({
  columns,
  rows,
  rowKey,
  sort,
  onSort,
  empty = "No records.",
}: {
  columns: Column<T>[];
  rows: readonly T[];
  rowKey: (row: T) => string;
  sort?: SortState;
  onSort?: (key: string) => void;
  empty?: string;
}) {
  return (
    <div className="card results-table">
      <div className="overflow-x-auto lg:overflow-x-visible">
        <table className="records">
          <thead>
            <tr>
              {columns.map((column) => {
                const sorted = sort?.key === column.key;
                const direction = sort?.dir === -1 ? "descending" : "ascending";
                return (
                  <th
                    key={column.key}
                    scope="col"
                    aria-sort={sorted ? direction : undefined}
                  >
                    <ColumnHead column={column} sort={sort} onSort={onSort} />
                  </th>
                );
              })}
            </tr>
          </thead>
          <tbody>
            {rows.length === 0 ? (
              <tr>
                <td colSpan={columns.length}>{empty}</td>
              </tr>
            ) : (
              rows.map((row) => (
                <tr key={rowKey(row)}>
                  {columns.map((column) => (
                    <td key={column.key}>{column.render(row)}</td>
                  ))}
                </tr>
              ))
            )}
          </tbody>
        </table>
      </div>
    </div>
  );
}

function ColumnHead<T>({
  column,
  sort,
  onSort,
}: {
  column: Column<T>;
  sort?: SortState;
  onSort?: (key: string) => void;
}) {
  if (!column.sortable || !onSort) return <>{column.label}</>;
  const sorted = sort?.key === column.key;
  const title = sorted
    ? sort?.dir === -1
      ? `Sorted descending by ${column.label}`
      : `Sorted ascending by ${column.label}`
    : `Sort by ${column.label}`;
  return (
    <button type="button" onClick={() => onSort(column.key)} title={title}>
      {column.label}
      <span aria-hidden="true" className={sorted ? "text-accent" : "text-muted/40"}>
        {sorted ? (sort?.dir === -1 ? " ↓" : " ↑") : " ↕"}
      </span>
    </button>
  );
}