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 CreatePoolArgs {
  sqrtPriceX64: BN
  openTime: BN
}

export interface CreatePoolAccounts {
  poolCreator: PublicKey
  ammConfig: PublicKey
  poolState: PublicKey
  tokenMint0: PublicKey
  tokenMint1: PublicKey
  tokenVault0: PublicKey
  tokenVault1: PublicKey
  observationState: PublicKey
  tickArrayBitmap: PublicKey
  tokenProgram0: PublicKey
  tokenProgram1: PublicKey
  systemProgram: PublicKey
  rent: PublicKey
}

export const layout = borsh.struct([
  borsh.u128("sqrtPriceX64"),
  borsh.u64("openTime"),
])

export function createPool(
  args: CreatePoolArgs,
  accounts: CreatePoolAccounts,
  programId: PublicKey = PROGRAM_ID
) {
  const keys: Array<AccountMeta> = [
    { pubkey: accounts.poolCreator, isSigner: true, isWritable: true },
    { pubkey: accounts.ammConfig, isSigner: false, isWritable: false },
    { pubkey: accounts.poolState, isSigner: false, isWritable: true },
    { pubkey: accounts.tokenMint0, isSigner: false, isWritable: false },
    { pubkey: accounts.tokenMint1, isSigner: false, isWritable: false },
    { pubkey: accounts.tokenVault0, isSigner: false, isWritable: true },
    { pubkey: accounts.tokenVault1, isSigner: false, isWritable: true },
    { pubkey: accounts.observationState, isSigner: false, isWritable: true },
    { pubkey: accounts.tickArrayBitmap, isSigner: false, isWritable: true },
    { pubkey: accounts.tokenProgram0, isSigner: false, isWritable: false },
    { pubkey: accounts.tokenProgram1, isSigner: false, isWritable: false },
    { pubkey: accounts.systemProgram, isSigner: false, isWritable: false },
    { pubkey: accounts.rent, isSigner: false, isWritable: false },
  ]
  const identifier = Buffer.from([233, 146, 209, 142, 207, 104, 64, 188])
  const buffer = Buffer.alloc(1000)
  const len = layout.encode(
    {
      sqrtPriceX64: args.sqrtPriceX64,
      openTime: args.openTime,
    },
    buffer
  )
  const data = Buffer.concat([identifier, buffer]).slice(0, 8 + len)
  const ix = new TransactionInstruction({ keys, programId, data })
  return ix
}