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 CreateAmmConfigArgs {
  index: number
  tickSpacing: number
  tradeFeeRate: number
  protocolFeeRate: number
  fundFeeRate: number
}

export interface CreateAmmConfigAccounts {
  owner: PublicKey
  ammConfig: PublicKey
  systemProgram: PublicKey
}

export const layout = borsh.struct([
  borsh.u16("index"),
  borsh.u16("tickSpacing"),
  borsh.u32("tradeFeeRate"),
  borsh.u32("protocolFeeRate"),
  borsh.u32("fundFeeRate"),
])

export function createAmmConfig(
  args: CreateAmmConfigArgs,
  accounts: CreateAmmConfigAccounts,
  programId: PublicKey = PROGRAM_ID
) {
  const keys: Array<AccountMeta> = [
    { pubkey: accounts.owner, isSigner: true, isWritable: true },
    { pubkey: accounts.ammConfig, isSigner: false, isWritable: true },
    { pubkey: accounts.systemProgram, isSigner: false, isWritable: false },
  ]
  const identifier = Buffer.from([137, 52, 237, 212, 215, 117, 108, 104])
  const buffer = Buffer.alloc(1000)
  const len = layout.encode(
    {
      index: args.index,
      tickSpacing: args.tickSpacing,
      tradeFeeRate: args.tradeFeeRate,
      protocolFeeRate: args.protocolFeeRate,
      fundFeeRate: args.fundFeeRate,
    },
    buffer
  )
  const data = Buffer.concat([identifier, buffer]).slice(0, 8 + len)
  const ix = new TransactionInstruction({ keys, programId, data })
  return ix
}