/**
 * This code was AUTOGENERATED using the Codama library.
 * Please DO NOT EDIT THIS FILE, instead use visitors
 * to add features, then rerun Codama to update it.
 *
 * @see https://github.com/codama-idl/codama
 */

import {
  combineCodec,
  fixDecoderSize,
  fixEncoderSize,
  getBytesDecoder,
  getBytesEncoder,
  getStructDecoder,
  getStructEncoder,
  getU128Decoder,
  getU128Encoder,
  transformEncoder,
  type AccountMeta,
  type AccountSignerMeta,
  type Address,
  type FixedSizeCodec,
  type FixedSizeDecoder,
  type FixedSizeEncoder,
  type Instruction,
  type InstructionWithAccounts,
  type InstructionWithData,
  type ReadonlyAccount,
  type ReadonlyUint8Array,
  type TransactionSigner,
  type WritableAccount,
  type WritableSignerAccount,
} from "@solana/kit";
import { FARMS_PROGRAM_ADDRESS } from "../programs";
import { getAccountMetaFactory, type ResolvedAccount } from "../shared";

export const UNSTAKE_DISCRIMINATOR = new Uint8Array([
  90, 95, 107, 42, 205, 124, 50, 225,
]);

export function getUnstakeDiscriminatorBytes() {
  return fixEncoderSize(getBytesEncoder(), 8).encode(UNSTAKE_DISCRIMINATOR);
}

export type UnstakeInstruction<
  TProgram extends string = typeof FARMS_PROGRAM_ADDRESS,
  TAccountOwner extends string | AccountMeta<string> = string,
  TAccountUserState extends string | AccountMeta<string> = string,
  TAccountFarmState extends string | AccountMeta<string> = string,
  TAccountScopePrices extends string | AccountMeta<string> = string,
  TRemainingAccounts extends readonly AccountMeta<string>[] = [],
> = Instruction<TProgram> &
  InstructionWithData<ReadonlyUint8Array> &
  InstructionWithAccounts<
    [
      TAccountOwner extends string
        ? WritableSignerAccount<TAccountOwner> &
            AccountSignerMeta<TAccountOwner>
        : TAccountOwner,
      TAccountUserState extends string
        ? WritableAccount<TAccountUserState>
        : TAccountUserState,
      TAccountFarmState extends string
        ? WritableAccount<TAccountFarmState>
        : TAccountFarmState,
      TAccountScopePrices extends string
        ? ReadonlyAccount<TAccountScopePrices>
        : TAccountScopePrices,
      ...TRemainingAccounts,
    ]
  >;

export type UnstakeInstructionData = {
  discriminator: ReadonlyUint8Array;
  stakeSharesScaled: bigint;
};

export type UnstakeInstructionDataArgs = { stakeSharesScaled: number | bigint };

export function getUnstakeInstructionDataEncoder(): FixedSizeEncoder<UnstakeInstructionDataArgs> {
  return transformEncoder(
    getStructEncoder([
      ["discriminator", fixEncoderSize(getBytesEncoder(), 8)],
      ["stakeSharesScaled", getU128Encoder()],
    ]),
    (value) => ({ ...value, discriminator: UNSTAKE_DISCRIMINATOR }),
  );
}

export function getUnstakeInstructionDataDecoder(): FixedSizeDecoder<UnstakeInstructionData> {
  return getStructDecoder([
    ["discriminator", fixDecoderSize(getBytesDecoder(), 8)],
    ["stakeSharesScaled", getU128Decoder()],
  ]);
}

export function getUnstakeInstructionDataCodec(): FixedSizeCodec<
  UnstakeInstructionDataArgs,
  UnstakeInstructionData
> {
  return combineCodec(
    getUnstakeInstructionDataEncoder(),
    getUnstakeInstructionDataDecoder(),
  );
}

export type UnstakeInput<
  TAccountOwner extends string = string,
  TAccountUserState extends string = string,
  TAccountFarmState extends string = string,
  TAccountScopePrices extends string = string,
> = {
  owner: TransactionSigner<TAccountOwner>;
  userState: Address<TAccountUserState>;
  farmState: Address<TAccountFarmState>;
  scopePrices?: Address<TAccountScopePrices>;
  stakeSharesScaled: UnstakeInstructionDataArgs["stakeSharesScaled"];
};

export function getUnstakeInstruction<
  TAccountOwner extends string,
  TAccountUserState extends string,
  TAccountFarmState extends string,
  TAccountScopePrices extends string,
  TProgramAddress extends Address = typeof FARMS_PROGRAM_ADDRESS,
>(
  input: UnstakeInput<
    TAccountOwner,
    TAccountUserState,
    TAccountFarmState,
    TAccountScopePrices
  >,
  config?: { programAddress?: TProgramAddress },
): UnstakeInstruction<
  TProgramAddress,
  TAccountOwner,
  TAccountUserState,
  TAccountFarmState,
  TAccountScopePrices
> {
  // Program address.
  const programAddress = config?.programAddress ?? FARMS_PROGRAM_ADDRESS;

  // Original accounts.
  const originalAccounts = {
    owner: { value: input.owner ?? null, isWritable: true },
    userState: { value: input.userState ?? null, isWritable: true },
    farmState: { value: input.farmState ?? null, isWritable: true },
    scopePrices: { value: input.scopePrices ?? null, isWritable: false },
  };
  const accounts = originalAccounts as Record<
    keyof typeof originalAccounts,
    ResolvedAccount
  >;

  // Original args.
  const args = { ...input };

  const getAccountMeta = getAccountMetaFactory(programAddress, "programId");
  return Object.freeze({
    accounts: [
      getAccountMeta(accounts.owner),
      getAccountMeta(accounts.userState),
      getAccountMeta(accounts.farmState),
      getAccountMeta(accounts.scopePrices),
    ],
    data: getUnstakeInstructionDataEncoder().encode(
      args as UnstakeInstructionDataArgs,
    ),
    programAddress,
  } as UnstakeInstruction<
    TProgramAddress,
    TAccountOwner,
    TAccountUserState,
    TAccountFarmState,
    TAccountScopePrices
  >);
}

export type ParsedUnstakeInstruction<
  TProgram extends string = typeof FARMS_PROGRAM_ADDRESS,
  TAccountMetas extends readonly AccountMeta[] = readonly AccountMeta[],
> = {
  programAddress: Address<TProgram>;
  accounts: {
    owner: TAccountMetas[0];
    userState: TAccountMetas[1];
    farmState: TAccountMetas[2];
    scopePrices?: TAccountMetas[3] | undefined;
  };
  data: UnstakeInstructionData;
};

export function parseUnstakeInstruction<
  TProgram extends string,
  TAccountMetas extends readonly AccountMeta[],
>(
  instruction: Instruction<TProgram> &
    InstructionWithAccounts<TAccountMetas> &
    InstructionWithData<ReadonlyUint8Array>,
): ParsedUnstakeInstruction<TProgram, TAccountMetas> {
  if (instruction.accounts.length < 4) {
    // TODO: Coded error.
    throw new Error("Not enough accounts");
  }
  let accountIndex = 0;
  const getNextAccount = () => {
    const accountMeta = (instruction.accounts as TAccountMetas)[accountIndex]!;
    accountIndex += 1;
    return accountMeta;
  };
  const getNextOptionalAccount = () => {
    const accountMeta = getNextAccount();
    return accountMeta.address === FARMS_PROGRAM_ADDRESS
      ? undefined
      : accountMeta;
  };
  return {
    programAddress: instruction.programAddress,
    accounts: {
      owner: getNextAccount(),
      userState: getNextAccount(),
      farmState: getNextAccount(),
      scopePrices: getNextOptionalAccount(),
    },
    data: getUnstakeInstructionDataDecoder().decode(instruction.data),
  };
}