let previous
export function randomSeed() {
  const bytes = new Uint32Array(1)
  globalThis.crypto.getRandomValues(bytes)
  let seed = 2 + bytes[0] % 2147483646
  if (seed === previous) seed = seed === 2147483647 ? 2 : seed + 1
  previous = seed
  return seed
}
export function queueSeeds(settings = {}, count = 1) {
  if (settings.seedMode === 'locked') {
    const seed=Number(settings.seed)
    if (!Number.isInteger(seed) || seed<0 || seed>2147483647) throw Object.assign(new Error('Invalid seed.'),{statusCode:400})
    return Array(count).fill(seed)
  }
  return Array.from({length:count},()=>randomSeed())
}