export function hashSeed(input) {
  const value = String(input)
  let hash = 2166136261

  for (let index = 0; index < value.length; index += 1) {
    hash ^= value.charCodeAt(index)
    hash = Math.imul(hash, 16777619)
  }

  return hash >>> 0
}

export function createRng(seed) {
  let state = typeof seed === 'number' ? seed >>> 0 : hashSeed(seed)

  return function next() {
    state += 0x6D2B79F5
    let value = state
    value = Math.imul(value ^ (value >>> 15), value | 1)
    value ^= value + Math.imul(value ^ (value >>> 7), value | 61)
    return ((value ^ (value >>> 14)) >>> 0) / 4294967296
  }
}

export function shuffleWithRng(items, rng) {
  const result = [...items]

  for (let index = result.length - 1; index > 0; index -= 1) {
    const swapIndex = Math.floor(rng() * (index + 1))
    const temp = result[index]
    result[index] = result[swapIndex]
    result[swapIndex] = temp
  }

  return result
}