function mediaSourceEngineSupported(): boolean {
  return !!(window as any).MediaSource && !!MediaSource.isTypeSupported;
}

function drmEngineSupported(): boolean {
  const basic =
    !!(window as any).MediaKeys &&
    !!(window as any).navigator &&
    !!(window as any).navigator.requestMediaKeySystemAccess &&
    !!(window as any).MediaKeySystemAccess &&
    !!(window as any).MediaKeySystemAccess.prototype.getConfiguration;

  return basic;
}

export const isBrowserSupported = (): boolean => {
  const basic =
    !!(window as any).Promise &&
    !!(window as any).Uint8Array &&
    !!Array.prototype.forEach;

  return basic && mediaSourceEngineSupported();
};

export const isBrowserSupportedDRM = (): boolean => {
  return isBrowserSupported() && drmEngineSupported();
};