export type ReleaseClockSource = 'system';

export type ReleaseClock = {
  source: ReleaseClockSource;
  now: () => number;
};

type ReleaseClockOptions = {
  wallNow?: () => number;
};

function systemClock(wallNow: () => number): ReleaseClock {
  return { source: 'system', now: wallNow };
}

export function createInitialReleaseClock(
  _serverNow: unknown,
  options: ReleaseClockOptions = {}
): ReleaseClock {
  return systemClock(options.wallNow ?? Date.now);
}

export async function synchronizeReleaseClock(options: ReleaseClockOptions = {}): Promise<ReleaseClock> {
  return systemClock(options.wallNow ?? Date.now);
}