// A tiny module-level stack so only the topmost open dialog (Modal or Drawer)
// reacts to Escape and owns the background `inert` toggle. This keeps stacked
// dialogs (e.g. a confirm on top of a management modal) from all closing at once.

const stack: symbol[] = [];

/** Push a dialog onto the stack. Returns its token. */
export function pushDialog(): symbol {
  const token = Symbol("dialog");
  stack.push(token);
  return token;
}

/** Remove a dialog from the stack by token. */
export function popDialog(token: symbol): void {
  const i = stack.lastIndexOf(token);
  if (i !== -1) stack.splice(i, 1);
}

/** True when `token` is the topmost open dialog. */
export function isTopDialog(token: symbol): boolean {
  return stack.length > 0 && stack[stack.length - 1] === token;
}

/** True when any dialog is open. */
export function hasOpenDialog(): boolean {
  return stack.length > 0;
}