/**
 * `KeyboardEvent.code` values the push-to-talk / push-to-deafen rebind must
 * never accept. Binding one of these turns it into a keyboard trap (the call
 * hotkey listener swallows the key everywhere outside an editable field for
 * the rest of the call) or collides with a bare modifier chord.
 */
const UNBINDABLE_CALL_KEY_CODES = new Set<string>([
  'Escape',
  'Tab',
  'Enter',
  'NumpadEnter',
  'ArrowUp',
  'ArrowDown',
  'ArrowLeft',
  'ArrowRight',
  'Home',
  'End',
  'PageUp',
  'PageDown',
  'ShiftLeft',
  'ShiftRight',
  'ControlLeft',
  'ControlRight',
  'AltLeft',
  'AltRight',
  'MetaLeft',
  'MetaRight',
]);

/** Whether `code` is safe to bind as a call hotkey (PTT / push-to-deafen). */
export function isBindableCallKey(code: string): boolean {
  return code.length > 0 && !UNBINDABLE_CALL_KEY_CODES.has(code);
}