import type { ConfirmOptions, Connection, PublicKey, Signer, TransactionSignature } from '@solana/web3.js';
import { sendAndConfirmTransaction, SystemProgram, Transaction } from '@solana/web3.js';
import {
    createInitializeGroupInstruction,
    createUpdateGroupMaxSizeInstruction,
    createUpdateGroupAuthorityInstruction,
    createInitializeMemberInstruction,
    TOKEN_GROUP_SIZE,
    TOKEN_GROUP_MEMBER_SIZE,
} from '@solana/spl-token-group';

import { TOKEN_2022_PROGRAM_ID } from '../../constants.js';
import { getSigners } from '../../actions/internal.js';

/**
 * Initialize a new `Group`
 *
 * Assumes one has already initialized a mint for the group.
 *
 * @param connection       Connection to use
 * @param payer            Payer of the transaction fee
 * @param mint             Group mint
 * @param mintAuthority    Group mint authority
 * @param updateAuthority  Group update authority
 * @param maxSize          Maximum number of members in the group
 * @param multiSigners     Signing accounts if `authority` is a multisig
 * @param confirmOptions   Options for confirming the transaction
 * @param programId        SPL Token program account
 *
 * @return Signature of the confirmed transaction
 */
export async function tokenGroupInitializeGroup(
    connection: Connection,
    payer: Signer,
    mint: PublicKey,
    mintAuthority: PublicKey | Signer,
    updateAuthority: PublicKey | null,
    maxSize: bigint,
    multiSigners: Signer[] = [],
    confirmOptions?: ConfirmOptions,
    programId = TOKEN_2022_PROGRAM_ID,
): Promise<TransactionSignature> {
    const [mintAuthorityPublicKey, signers] = getSigners(mintAuthority, multiSigners);

    const transaction = new Transaction().add(
        createInitializeGroupInstruction({
            programId,
            group: mint,
            mint,
            mintAuthority: mintAuthorityPublicKey,
            updateAuthority,
            maxSize,
        }),
    );

    return await sendAndConfirmTransaction(connection, transaction, [payer, ...signers], confirmOptions);
}

/**
 * Initialize a new `Group` with rent transfer.
 *
 * Assumes one has already initialized a mint for the group.
 *
 * @param connection       Connection to use
 * @param payer            Payer of the transaction fee
 * @param mint             Group mint
 * @param mintAuthority    Group mint authority
 * @param updateAuthority  Group update authority
 * @param maxSize          Maximum number of members in the group
 * @param multiSigners     Signing accounts if `authority` is a multisig
 * @param confirmOptions   Options for confirming the transaction
 * @param programId        SPL Token program account
 *
 * @return Signature of the confirmed transaction
 */
export async function tokenGroupInitializeGroupWithRentTransfer(
    connection: Connection,
    payer: Signer,
    mint: PublicKey,
    mintAuthority: PublicKey | Signer,
    updateAuthority: PublicKey | null,
    maxSize: bigint,
    multiSigners: Signer[] = [],
    confirmOptions?: ConfirmOptions,
    programId = TOKEN_2022_PROGRAM_ID,
): Promise<TransactionSignature> {
    const [mintAuthorityPublicKey, signers] = getSigners(mintAuthority, multiSigners);

    const lamports = await connection.getMinimumBalanceForRentExemption(TOKEN_GROUP_SIZE);

    const transaction = new Transaction().add(
        SystemProgram.transfer({
            fromPubkey: payer.publicKey,
            toPubkey: mint,
            lamports,
        }),
        createInitializeGroupInstruction({
            programId,
            group: mint,
            mint,
            mintAuthority: mintAuthorityPublicKey,
            updateAuthority,
            maxSize,
        }),
    );

    return await sendAndConfirmTransaction(connection, transaction, [payer, ...signers], confirmOptions);
}

/**
 * Update the max size of a `Group`
 *
 * @param connection       Connection to use
 * @param payer            Payer of the transaction fee
 * @param mint             Group mint
 * @param updateAuthority  Group update authority
 * @param maxSize          Maximum number of members in the group
 * @param multiSigners     Signing accounts if `authority` is a multisig
 * @param confirmOptions   Options for confirming the transaction
 * @param programId        SPL Token program account
 *
 * @return Signature of the confirmed transaction
 */
export async function tokenGroupUpdateGroupMaxSize(
    connection: Connection,
    payer: Signer,
    mint: PublicKey,
    updateAuthority: PublicKey | Signer,
    maxSize: bigint,
    multiSigners: Signer[] = [],
    confirmOptions?: ConfirmOptions,
    programId = TOKEN_2022_PROGRAM_ID,
): Promise<TransactionSignature> {
    const [updateAuthorityPublicKey, signers] = getSigners(updateAuthority, multiSigners);

    const transaction = new Transaction().add(
        createUpdateGroupMaxSizeInstruction({
            programId,
            group: mint,
            updateAuthority: updateAuthorityPublicKey,
            maxSize,
        }),
    );

    return await sendAndConfirmTransaction(connection, transaction, [payer, ...signers], confirmOptions);
}

/**
 * Update the authority of a `Group`
 *
 * @param connection       Connection to use
 * @param payer            Payer of the transaction fee
 * @param mint             Group mint
 * @param updateAuthority  Group update authority
 * @param newAuthority     New authority for the token group, or unset
 * @param multiSigners     Signing accounts if `authority` is a multisig
 * @param confirmOptions   Options for confirming the transaction
 * @param programId        SPL Token program account
 *
 * @return Signature of the confirmed transaction
 */
export async function tokenGroupUpdateGroupAuthority(
    connection: Connection,
    payer: Signer,
    mint: PublicKey,
    updateAuthority: PublicKey | Signer,
    newAuthority: PublicKey | null,
    multiSigners: Signer[] = [],
    confirmOptions?: ConfirmOptions,
    programId = TOKEN_2022_PROGRAM_ID,
): Promise<TransactionSignature> {
    const [updateAuthorityPublicKey, signers] = getSigners(updateAuthority, multiSigners);

    const transaction = new Transaction().add(
        createUpdateGroupAuthorityInstruction({
            programId,
            group: mint,
            currentAuthority: updateAuthorityPublicKey,
            newAuthority,
        }),
    );

    return await sendAndConfirmTransaction(connection, transaction, [payer, ...signers], confirmOptions);
}

/**
 * Initialize a new `Member` of a `Group`
 *
 * Assumes the `Group` has already been initialized,
 * as well as the mint for the member.
 *
 * @param connection             Connection to use
 * @param payer                  Payer of the transaction fee
 * @param mint                   Member mint
 * @param mintAuthority          Member mint authority
 * @param group                  Group mint
 * @param groupUpdateAuthority   Group update authority
 * @param multiSigners           Signing accounts if `authority` is a multisig
 * @param confirmOptions         Options for confirming the transaction
 * @param programId              SPL Token program account
 *
 * @return Signature of the confirmed transaction
 */
export async function tokenGroupMemberInitialize(
    connection: Connection,
    payer: Signer,
    mint: PublicKey,
    mintAuthority: PublicKey | Signer,
    group: PublicKey,
    groupUpdateAuthority: PublicKey,
    multiSigners: Signer[] = [],
    confirmOptions?: ConfirmOptions,
    programId = TOKEN_2022_PROGRAM_ID,
): Promise<TransactionSignature> {
    const [mintAuthorityPublicKey, signers] = getSigners(mintAuthority, multiSigners);

    const transaction = new Transaction().add(
        createInitializeMemberInstruction({
            programId,
            member: mint,
            memberMint: mint,
            memberMintAuthority: mintAuthorityPublicKey,
            group,
            groupUpdateAuthority,
        }),
    );

    return await sendAndConfirmTransaction(connection, transaction, [payer, ...signers], confirmOptions);
}

/**
 * Initialize a new `Member` of a `Group` with rent transfer.
 *
 * Assumes the `Group` has already been initialized,
 * as well as the mint for the member.
 *
 * @param connection             Connection to use
 * @param payer                  Payer of the transaction fee
 * @param mint                   Member mint
 * @param mintAuthority          Member mint authority
 * @param group                  Group mint
 * @param groupUpdateAuthority   Group update authority
 * @param multiSigners           Signing accounts if `authority` is a multisig
 * @param confirmOptions         Options for confirming the transaction
 * @param programId              SPL Token program account
 *
 * @return Signature of the confirmed transaction
 */
export async function tokenGroupMemberInitializeWithRentTransfer(
    connection: Connection,
    payer: Signer,
    mint: PublicKey,
    mintAuthority: PublicKey | Signer,
    group: PublicKey,
    groupUpdateAuthority: PublicKey,
    multiSigners: Signer[] = [],
    confirmOptions?: ConfirmOptions,
    programId = TOKEN_2022_PROGRAM_ID,
): Promise<TransactionSignature> {
    const [mintAuthorityPublicKey, signers] = getSigners(mintAuthority, multiSigners);

    const lamports = await connection.getMinimumBalanceForRentExemption(TOKEN_GROUP_MEMBER_SIZE);

    const transaction = new Transaction().add(
        SystemProgram.transfer({
            fromPubkey: payer.publicKey,
            toPubkey: mint,
            lamports,
        }),
        createInitializeMemberInstruction({
            programId,
            member: mint,
            memberMint: mint,
            memberMintAuthority: mintAuthorityPublicKey,
            group,
            groupUpdateAuthority,
        }),
    );

    return await sendAndConfirmTransaction(connection, transaction, [payer, ...signers], confirmOptions);
}