import { type StringToBytesErrorType, stringToBytes } from 'viem'
import {
  type ErrorType,
  WrappedLabelTooLargeError,
} from '../../../errors/utils.js'
import type { AnyDate } from '../../../types/index.js'
import { ParentFuses } from './fuses.js'

export const MAX_EXPIRY = 2n ** 64n - 1n

// ================================
// Expiry to bigint
// ================================

export type ExpiryToBigIntErrorType = TypeError | ErrorType

export const expiryToBigInt = (expiry?: AnyDate, defaultValue = 0n): bigint => {
  if (!expiry) return defaultValue
  if (typeof expiry === 'bigint') return expiry
  if (typeof expiry === 'string' || typeof expiry === 'number')
    return BigInt(expiry)
  if (expiry instanceof Date) return BigInt(Math.floor(expiry.getTime() / 1000))
  throw new TypeError('Expiry must be a bigint, string, number or Date')
}

// ================================
// Wrapped label length check
// ================================

export type WrappedLabelLengthCheckErrorType =
  | WrappedLabelTooLargeError
  | StringToBytesErrorType

export const wrappedLabelLengthCheck = (label: string) => {
  const bytes = stringToBytes(label)
  if (bytes.byteLength > 255)
    throw new WrappedLabelTooLargeError({
      label,
      byteLength: bytes.byteLength,
    })
}

// ================================
// Make default expiry
// ================================

export type MakeDefaultExpiryErrorType = ErrorType

export const makeDefaultExpiry = (fuses?: number): bigint => {
  if (fuses && BigInt(fuses) & ParentFuses.PARENT_CANNOT_CONTROL)
    return MAX_EXPIRY
  return 0n
}