export function makeClientUuid(): string {
  const cryptoApi = globalThis.crypto
  if (cryptoApi?.randomUUID) {
    return cryptoApi.randomUUID()
  }

  const bytes = new Uint8Array(16)
  if (cryptoApi?.getRandomValues) {
    cryptoApi.getRandomValues(bytes)
  } else {
    for (let i = 0; i < bytes.length; i += 1) {
      bytes[i] = Math.floor(Math.random() * 256)
    }
  }

  bytes[6] = (bytes[6] & 0x0f) | 0x40
  bytes[8] = (bytes[8] & 0x3f) | 0x80
  const hex = Array.from(bytes, byte => byte.toString(16).padStart(2, '0'))
  return [
    hex.slice(0, 4).join(''),
    hex.slice(4, 6).join(''),
    hex.slice(6, 8).join(''),
    hex.slice(8, 10).join(''),
    hex.slice(10, 16).join(''),
  ].join('-')
}

export function makeClientMessageId(): string {
  return `client-${makeClientUuid()}`
}

export function makeClientRequestId(): string {
  return `request-${makeClientUuid()}`
}

export function makeDeviceId(): string {
  return `device_${makeClientUuid()}`
}