import { TransactionInstruction, PublicKey, AccountMeta } from "@solana/web3.js" // eslint-disable-line @typescript-eslint/no-unused-vars
import BN from "bn.js" // eslint-disable-line @typescript-eslint/no-unused-vars
import * as borsh from "@coral-xyz/borsh" // eslint-disable-line @typescript-eslint/no-unused-vars
import * as types from "../types" // eslint-disable-line @typescript-eslint/no-unused-vars
import { PROGRAM_ID } from "../programId"

export interface SetFeeRateArgs {
  feeRate: number
}

export interface SetFeeRateAccounts {
  whirlpoolsConfig: PublicKey
  whirlpool: PublicKey
  feeAuthority: PublicKey
}

export const layout = borsh.struct([borsh.u16("feeRate")])

export function setFeeRate(
  args: SetFeeRateArgs,
  accounts: SetFeeRateAccounts,
  programId: PublicKey = PROGRAM_ID
) {
  const keys: Array<AccountMeta> = [
    { pubkey: accounts.whirlpoolsConfig, isSigner: false, isWritable: false },
    { pubkey: accounts.whirlpool, isSigner: false, isWritable: true },
    { pubkey: accounts.feeAuthority, isSigner: true, isWritable: false },
  ]
  const identifier = Buffer.from([53, 243, 137, 65, 8, 140, 158, 6])
  const buffer = Buffer.alloc(1000)
  const len = layout.encode(
    {
      feeRate: args.feeRate,
    },
    buffer
  )
  const data = Buffer.concat([identifier, buffer]).slice(0, 8 + len)
  const ix = new TransactionInstruction({ keys, programId, data })
  return ix
}