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 { PROGRAM_ID } from '../programId';

export interface DecreaseLiquidityV2Args {
  liquidity: BN;
  amount0Min: BN;
  amount1Min: BN;
}

export interface DecreaseLiquidityV2Accounts {
  /** The position owner or delegated authority */
  nftOwner: PublicKey;
  /** The token account for the tokenized position */
  nftAccount: PublicKey;
  /** Decrease liquidity for this position */
  personalPosition: PublicKey;
  poolState: PublicKey;
  protocolPosition: PublicKey;
  /** Token_0 vault */
  tokenVault0: PublicKey;
  /** Token_1 vault */
  tokenVault1: PublicKey;
  /** Stores init state for the lower tick */
  tickArrayLower: PublicKey;
  /** Stores init state for the upper tick */
  tickArrayUpper: PublicKey;
  /** The destination token account for receive amount_0 */
  recipientTokenAccount0: PublicKey;
  /** The destination token account for receive amount_1 */
  recipientTokenAccount1: PublicKey;
  /** SPL program to transfer out tokens */
  tokenProgram: PublicKey;
  /** Token program 2022 */
  tokenProgram2022: PublicKey;
  /** memo program */
  memoProgram: PublicKey;
  /** The mint of token vault 0 */
  vault0Mint: PublicKey;
  /** The mint of token vault 1 */
  vault1Mint: PublicKey;
}

export const layout = borsh.struct([borsh.u128('liquidity'), borsh.u64('amount0Min'), borsh.u64('amount1Min')]);

/**
 * Decreases liquidity with a exist position, support Token2022
 *
 * # Arguments
 *
 * * `ctx` -  The context of accounts
 * * `liquidity` - The amount by which liquidity will be decreased
 * * `amount_0_min` - The minimum amount of token_0 that should be accounted for the burned liquidity
 * * `amount_1_min` - The minimum amount of token_1 that should be accounted for the burned liquidity
 *
 */
export function decreaseLiquidityV2(args: DecreaseLiquidityV2Args, accounts: DecreaseLiquidityV2Accounts) {
  const keys: Array<AccountMeta> = [
    { pubkey: accounts.nftOwner, isSigner: true, isWritable: false },
    { pubkey: accounts.nftAccount, isSigner: false, isWritable: false },
    { pubkey: accounts.personalPosition, isSigner: false, isWritable: true },
    { pubkey: accounts.poolState, isSigner: false, isWritable: true },
    { pubkey: accounts.protocolPosition, isSigner: false, isWritable: true },
    { pubkey: accounts.tokenVault0, isSigner: false, isWritable: true },
    { pubkey: accounts.tokenVault1, isSigner: false, isWritable: true },
    { pubkey: accounts.tickArrayLower, isSigner: false, isWritable: true },
    { pubkey: accounts.tickArrayUpper, isSigner: false, isWritable: true },
    {
      pubkey: accounts.recipientTokenAccount0,
      isSigner: false,
      isWritable: true,
    },
    {
      pubkey: accounts.recipientTokenAccount1,
      isSigner: false,
      isWritable: true,
    },
    { pubkey: accounts.tokenProgram, isSigner: false, isWritable: false },
    { pubkey: accounts.tokenProgram2022, isSigner: false, isWritable: false },
    { pubkey: accounts.memoProgram, isSigner: false, isWritable: false },
    { pubkey: accounts.vault0Mint, isSigner: false, isWritable: false },
    { pubkey: accounts.vault1Mint, isSigner: false, isWritable: false },
  ];
  const identifier = Buffer.from([58, 127, 188, 62, 79, 82, 196, 96]);
  const buffer = Buffer.alloc(1000);
  const len = layout.encode(
    {
      liquidity: args.liquidity,
      amount0Min: args.amount0Min,
      amount1Min: args.amount1Min,
    },
    buffer
  );
  const data = Buffer.concat([identifier, buffer]).slice(0, 8 + len);
  const ix = new TransactionInstruction({ keys, programId: PROGRAM_ID, data });
  return ix;
}