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 ClaimRewardArgs {
  rewardIndex: BN
}

export interface ClaimRewardAccounts {
  lbPair: PublicKey
  position: PublicKey
  binArrayLower: PublicKey
  binArrayUpper: PublicKey
  sender: PublicKey
  rewardVault: PublicKey
  rewardMint: PublicKey
  userTokenAccount: PublicKey
  tokenProgram: PublicKey
  eventAuthority: PublicKey
  program: PublicKey
}

export const layout = borsh.struct([borsh.u64("rewardIndex")])

export function claimReward(
  args: ClaimRewardArgs,
  accounts: ClaimRewardAccounts,
  programId: PublicKey = PROGRAM_ID
) {
  const keys: Array<AccountMeta> = [
    { pubkey: accounts.lbPair, isSigner: false, isWritable: true },
    { pubkey: accounts.position, isSigner: false, isWritable: true },
    { pubkey: accounts.binArrayLower, isSigner: false, isWritable: true },
    { pubkey: accounts.binArrayUpper, isSigner: false, isWritable: true },
    { pubkey: accounts.sender, isSigner: true, isWritable: false },
    { pubkey: accounts.rewardVault, isSigner: false, isWritable: true },
    { pubkey: accounts.rewardMint, isSigner: false, isWritable: false },
    { pubkey: accounts.userTokenAccount, isSigner: false, isWritable: true },
    { pubkey: accounts.tokenProgram, isSigner: false, isWritable: false },
    { pubkey: accounts.eventAuthority, isSigner: false, isWritable: false },
    { pubkey: accounts.program, isSigner: false, isWritable: false },
  ]
  const identifier = Buffer.from([149, 95, 181, 242, 94, 90, 158, 162])
  const buffer = Buffer.alloc(1000)
  const len = layout.encode(
    {
      rewardIndex: args.rewardIndex,
    },
    buffer
  )
  const data = Buffer.concat([identifier, buffer]).slice(0, 8 + len)
  const ix = new TransactionInstruction({ keys, programId, data })
  return ix
}