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Base Library to work with Hiero in Spring and JakartaEE
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package com.openelements.hiero.base.protocol;

import com.hedera.hashgraph.sdk.Hbar;
import com.hedera.hashgraph.sdk.PrivateKey;
import com.hedera.hashgraph.sdk.TokenId;
import java.nio.charset.StandardCharsets;
import java.time.Duration;
import java.util.List;
import java.util.Objects;
import org.jspecify.annotations.NonNull;
import org.jspecify.annotations.Nullable;

public record TokenMintRequest(@NonNull Hbar maxTransactionFee,
                               @NonNull Duration transactionValidDuration,
                               @NonNull TokenId tokenId,
                               @NonNull PrivateKey supplyKey,
                               @Nullable Long amount,
                               @NonNull List metadata) implements TransactionRequest {

    static final int MAX_METADATA_SIZE = 100;

    public TokenMintRequest {
        Objects.requireNonNull(tokenId, "tokenId must not be null");
        Objects.requireNonNull(supplyKey, "supplyKey must not be null");
        Objects.requireNonNull(metadata, "metadata must not be null");
        if (amount == null && metadata.isEmpty()) {
            throw new IllegalArgumentException("either amount or metadata must be provided");
        }
        if (amount != null && amount <= 0) {
            throw new IllegalArgumentException("amount must be greater than 0");
        }
        metadata.forEach(m -> {
            if (m.length > MAX_METADATA_SIZE) {
                throw new IllegalArgumentException(
                        "each metadata entry must be less than " + MAX_METADATA_SIZE + " bytes");
            }
        });
    }

    public static TokenMintRequest of(@NonNull final TokenId tokenId, @NonNull final PrivateKey supplyKey,
            @NonNull byte[]... metadata) {
        Objects.requireNonNull(metadata, "metadata must not be null");
        return new TokenMintRequest(TransactionRequest.DEFAULT_MAX_TRANSACTION_FEE,
                TransactionRequest.DEFAULT_TRANSACTION_VALID_DURATION, tokenId, supplyKey, null, List.of(metadata));
    }

    public static TokenMintRequest of(@NonNull final TokenId tokenId, @NonNull final PrivateKey supplyKey) {
        return new TokenMintRequest(TransactionRequest.DEFAULT_MAX_TRANSACTION_FEE,
                TransactionRequest.DEFAULT_TRANSACTION_VALID_DURATION, tokenId, supplyKey, null, List.of());
    }

    public static TokenMintRequest of(@NonNull final TokenId tokenId, @NonNull final PrivateKey supplyKey,
            long amount) {
        return new TokenMintRequest(TransactionRequest.DEFAULT_MAX_TRANSACTION_FEE,
                TransactionRequest.DEFAULT_TRANSACTION_VALID_DURATION, tokenId, supplyKey, amount, List.of());
    }

    public static TokenMintRequest of(@NonNull final TokenId tokenId, @NonNull final PrivateKey supplyKey,
            @NonNull final String metadata) {
        Objects.requireNonNull(metadata, "metadata must not be null");
        return new TokenMintRequest(TransactionRequest.DEFAULT_MAX_TRANSACTION_FEE,
                TransactionRequest.DEFAULT_TRANSACTION_VALID_DURATION, tokenId, supplyKey, null,
                List.of(metadata.getBytes(
                        StandardCharsets.UTF_8)));
    }

    public static TokenMintRequest of(@NonNull final TokenId tokenId, @NonNull final PrivateKey supplyKey,
            @NonNull final List metadata) {
        Objects.requireNonNull(metadata, "metadata must not be null");
        final List metadataBytes = metadata.stream().map(m -> m.getBytes(StandardCharsets.UTF_8)).toList();
        return new TokenMintRequest(TransactionRequest.DEFAULT_MAX_TRANSACTION_FEE,
                TransactionRequest.DEFAULT_TRANSACTION_VALID_DURATION, tokenId, supplyKey, null, metadataBytes);
    }

}