package utils.blockchain;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import java.util.Base64;

/**
 * BchInfoEntry — данные об одной цепочке блокчейна.
 * Используется менеджером BchInfoManager.
 */
public final class BchInfoEntry {

    @JsonProperty("blockchainId")
    public final long blockchainId;

    @JsonProperty("userLogin")
    public final String userLogin;

    @JsonProperty("publicKeyBase64")
    public final String publicKeyBase64;

    @JsonProperty("blockchainSizeLimit")
    public final int blockchainSizeLimit;

    @JsonProperty("blockchainSize")
    public final int blockchainSize;

    @JsonProperty("lastBlockNumber")
    public final int lastBlockNumber;

    @JsonProperty("lastBlockHash")
    public final String lastBlockHash;

    @JsonCreator
    public BchInfoEntry(
            @JsonProperty("blockchainId") long blockchainId,
            @JsonProperty("userLogin") String userLogin,
            @JsonProperty("publicKeyBase64") String publicKeyBase64,
            @JsonProperty("blockchainSizeLimit") int blockchainSizeLimit,
            @JsonProperty("blockchainSize") int blockchainSize,
            @JsonProperty("lastBlockNumber") int lastBlockNumber,
            @JsonProperty("lastBlockHash") String lastBlockHash
    ) {
        this.blockchainId = blockchainId;
        this.userLogin = userLogin == null ? "" : userLogin;
        this.publicKeyBase64 = publicKeyBase64;
        this.blockchainSizeLimit = blockchainSizeLimit;
        this.blockchainSize = blockchainSize;
        this.lastBlockNumber = lastBlockNumber;
        this.lastBlockHash = lastBlockHash == null ? "" : lastBlockHash;
    }

    /** Публичный ключ в бинарном виде (32 байта) или null, если битый. */
    public byte[] getPublicKey32() {
        try {
            byte[] raw = Base64.getDecoder().decode(publicKeyBase64);
            return (raw != null && raw.length == 32) ? raw : null;
        } catch (IllegalArgumentException e) {
            return null;
        }
    }
}