// The create-agent form's permissions logic, kept out of the component so
// `npm test` can run it.

/** `selected` with `value` added, or removed when it is there. */
export function togglePermission(selected: string[], value: string): string[] {
  return selected.includes(value)
    ? selected.filter((p) => p !== value)
    : [...selected, value];
}

/**
 * The `permissions` to send with a create: `undefined` while `selected` is
 * the default set (in any order), so the agent's key stays unset and follows
 * the default; otherwise the list, which may be empty.
 */
export function requestPermissions(
  selected: string[],
  defaults: string[],
): string[] | undefined {
  const same =
    selected.length === defaults.length &&
    selected.every((p) => defaults.includes(p));
  return same ? undefined : selected;
}

/**
 * The form's starting selection: `defaults` plus each of `extra` the
 * catalogue lists (`all`), so a name the controller does not know is not
 * sent.
 */
export function initialSelection(
  all: string[],
  defaults: string[],
  extra: string[],
): string[] {
  return [
    ...defaults,
    ...extra.filter((p) => all.includes(p) && !defaults.includes(p)),
  ];
}