/*******************************************************************************
 * Copyright (C) 2026, Leo Galambos
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
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 * 3. All advertising materials mentioning features or use of this software must
 *    display the following acknowledgement:
 *    This product includes software developed by the Egothor project.
 *
 * 4. Neither the name of the copyright holder nor the names of its contributors
 *    may be used to endorse or promote products derived from this software without
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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package zeroecho.pki.impl.core;

import java.util.ArrayList;
import java.util.List;

import zeroecho.pki.api.attr.AttributeId;
import zeroecho.pki.api.attr.AttributeSet;
import zeroecho.pki.api.attr.AttributeValue;
import zeroecho.pki.api.credential.Credential;
import zeroecho.pki.api.credential.CredentialBundle;
import zeroecho.pki.impl.core.attr.SimpleAttributeSet;

/**
 * Internal defensive snapshot boundary for framework-produced credentials.
 */
final class CredentialSnapshots {

    private CredentialSnapshots() {
    }

    /* default */ static CredentialBundle copy(CredentialBundle source) {
        Credential credential = copy(source.credential());
        return new CredentialBundle(credential, List.copyOf(source.supportingObjects()));
    }

    /* default */ static Credential copy(Credential source) {
        return new Credential(source.credentialId(), source.formatId(), source.issuerRef(), source.subjectRef(),
                source.validity(), source.serialOrUniqueId(), source.publicKeyId(), source.profileBinding(),
                source.status(), source.content(), copy(source.attributes()));
    }

    private static AttributeSet copy(AttributeSet source) {
        List<SimpleAttributeSet.Entry> entries = new ArrayList<>();
        for (AttributeId id : source.ids()) {
            List<AttributeValue> values = source.getAll(id).stream().map(CredentialSnapshots::copy).toList();
            entries.add(new SimpleAttributeSet.Entry(id, values));
        }
        return new SimpleAttributeSet(entries);
    }

    private static AttributeValue copy(AttributeValue source) {
        if (source instanceof AttributeValue.BytesValue bytesValue) {
            return new AttributeValue.BytesValue(bytesValue.value().clone());
        }
        return source;
    }
}
