/**
 * @module index
 */
import { base58Encode, blake2b, concat, signBytes, address } from '@waves/ts-lib-crypto'
import { serializePrimitives } from '@waves/marshall'
const {LONG, BASE58_STRING} = serializePrimitives
import { getSenderPublicKey, convertToPairs } from '../generic'
import { IWavesAuthParams, IWavesAuth } from '../transactions'
import { validate } from '../validators'
import { TSeedTypes } from '../types'

export const serializeWavesAuthData = (auth: {publicKey: string; timestamp: number}) => concat(
    BASE58_STRING(auth.publicKey),
    LONG(auth.timestamp)
)

export function wavesAuth(params: IWavesAuthParams, seed?: TSeedTypes, chainId?: string|number): IWavesAuth {
  const seedsAndIndexes = convertToPairs(seed)
  const publicKey = params.publicKey || getSenderPublicKey(seedsAndIndexes, {senderPublicKey: undefined})
  const timestamp = params.timestamp || Date.now()
  validate.wavesAuth({ publicKey, timestamp })
  
  const rx = {
    hash: '',
    signature: '',
    timestamp,
    publicKey,
    address: address({ publicKey }, chainId),
  }
  
  const bytes = serializeWavesAuthData(rx)
  
  rx.signature = seedsAndIndexes.map(([seed]) => signBytes(seed, bytes))[0] || ''
  rx.hash =  base58Encode(blake2b(Uint8Array.from(bytes)))

  return rx
}