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 '@project-serum/borsh'; // eslint-disable-line @typescript-eslint/no-unused-vars
import * as types from '../types'; // eslint-disable-line @typescript-eslint/no-unused-vars
import { WHIRLPOOL_PROGRAM_ID } from '../programId';

export interface InitializeConfigArgs {
  feeAuthority: PublicKey;
  collectProtocolFeesAuthority: PublicKey;
  rewardEmissionsSuperAuthority: PublicKey;
  defaultProtocolFeeRate: number;
}

export interface InitializeConfigAccounts {
  config: PublicKey;
  funder: PublicKey;
  systemProgram: PublicKey;
}

export const layout = borsh.struct([
  borsh.publicKey('feeAuthority'),
  borsh.publicKey('collectProtocolFeesAuthority'),
  borsh.publicKey('rewardEmissionsSuperAuthority'),
  borsh.u16('defaultProtocolFeeRate'),
]);

export function initializeConfig(args: InitializeConfigArgs, accounts: InitializeConfigAccounts) {
  const keys: Array<AccountMeta> = [
    { pubkey: accounts.config, isSigner: true, isWritable: true },
    { pubkey: accounts.funder, isSigner: true, isWritable: true },
    { pubkey: accounts.systemProgram, isSigner: false, isWritable: false },
  ];
  const identifier = Buffer.from([208, 127, 21, 1, 194, 190, 196, 70]);
  const buffer = Buffer.alloc(1000);
  const len = layout.encode(
    {
      feeAuthority: args.feeAuthority,
      collectProtocolFeesAuthority: args.collectProtocolFeesAuthority,
      rewardEmissionsSuperAuthority: args.rewardEmissionsSuperAuthority,
      defaultProtocolFeeRate: args.defaultProtocolFeeRate,
    },
    buffer
  );
  const data = Buffer.concat([identifier, buffer]).slice(0, 8 + len);
  const ix = new TransactionInstruction({ keys, programId: WHIRLPOOL_PROGRAM_ID, data });
  return ix;
}