import { keccak256 as solidityKeccak256 } from '@ethersproject/solidity'

import { FNSArgs } from '..'
import { namehash } from '../utils/normalise'
import { checkIsDotFtm } from '../utils/validation'

export default async function (
  { contracts, signer }: FNSArgs<'contracts' | 'signer'>,
  name: string,
  {
    newController,
    newRegistrant,
  }: {
    newController: string
    newRegistrant?: string
  },
) {
  const labels = name.split('.')
  const labelhash = solidityKeccak256(['string'], [labels[0]])
  const parentNodehash = namehash(labels.slice(1).join('.'))

  const nameWrapper = (await contracts!.getNameWrapper()!).connect(signer)

  if (checkIsDotFtm(labels)) {
    if (!newRegistrant) {
      throw new Error('newRegistrant must be specified for .ftm names')
    }

    return nameWrapper.populateTransaction.unwrapFTM2LD(
      labelhash,
      newRegistrant,
      newController,
    )
  }
  if (newRegistrant) {
    throw new Error('newRegistrant can only be specified for .ftm names')
  }

  return nameWrapper.populateTransaction.unwrap(
    parentNodehash,
    labelhash,
    newController,
  )
}