import type { KeyboardEvent } from 'react';

export interface ClickableProps {
  role: 'button';
  tabIndex: number;
  onClick: () => void;
  onKeyDown: (e: KeyboardEvent) => void;
}

/**
 * Props to spread onto a non-interactive element (typically a `<div>`) that
 * acts like a button (e.g. a clickable list row or grid tile), so it
 * becomes keyboard-operable: `role="button"`, a tab stop, and Enter/Space
 * activation in addition to the existing click behavior.
 *
 * Usage: `<div {...clickableProps(() => doThing())}>...</div>`
 */
export function clickableProps(onActivate: () => void): ClickableProps {
  return {
    role: 'button',
    tabIndex: 0,
    onClick: onActivate,
    onKeyDown: (e: KeyboardEvent) => {
      // Ignore keydown events that bubbled up from a nested interactive
      // element (e.g. a child <button>). Handling only events targeted at
      // this element lets the browser's native "click" synthesis for a
      // focused child control proceed instead of being hijacked by the
      // row's own Enter/Space activation.
      if (e.target !== e.currentTarget) return;
      if (e.key === 'Enter' || e.key === ' ') {
        e.preventDefault();
        onActivate();
      }
    },
  };
}