/*
 *
 * Copyright (c) 2013 - 2017 Lijun Liao
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 *
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
 * THE AUTHOR LIJUN LIAO. LIJUN LIAO DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
 * OF THIRD PARTY RIGHTS.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the XiPKI software without
 * disclosing the source code of your own applications.
 *
 * For more information, please contact Lijun Liao at this
 * address: lijun.liao@gmail.com
 */

package org.xipki.pki.ocsp.server.impl.store.db;

import java.io.IOException;
import java.security.cert.CertificateEncodingException;
import java.security.cert.X509Certificate;
import java.util.Collection;
import java.util.Collections;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import org.bouncycastle.asn1.x509.Certificate;
import org.xipki.commons.common.util.ParamUtil;
import org.xipki.commons.security.CertRevocationInfo;
import org.xipki.commons.security.CrlReason;
import org.xipki.commons.security.HashAlgoType;
import org.xipki.pki.ocsp.api.IssuerHashNameAndKey;

/**
 * @author Lijun Liao
 * @since 2.0.0
 */

public class IssuerEntry {

    private final int id;

    private final Map<HashAlgoType, IssuerHashNameAndKey> issuerHashMap;

    private final Date notBefore;

    private final X509Certificate cert;

    private CertRevocationInfo revocationInfo;

    private CrlInfo crlInfo;

    public IssuerEntry(final int id, final X509Certificate cert)
            throws CertificateEncodingException {
        this.id = id;
        this.cert = ParamUtil.requireNonNull("cert", cert);
        this.notBefore = cert.getNotBefore();
        this.issuerHashMap = getIssuerHashAndKeys(cert.getEncoded());
    }

    private static Map<HashAlgoType, IssuerHashNameAndKey> getIssuerHashAndKeys(byte[] encodedCert)
            throws CertificateEncodingException {
        byte[] encodedName;
        byte[] encodedKey;
        try {
            Certificate bcCert = Certificate.getInstance(encodedCert);
            encodedName = bcCert.getSubject().getEncoded("DER");
            encodedKey = bcCert.getSubjectPublicKeyInfo().getPublicKeyData().getBytes();
        } catch (IllegalArgumentException | IOException ex) {
            throw new CertificateEncodingException(ex.getMessage(), ex);
        }

        Map<HashAlgoType, IssuerHashNameAndKey> hashes = new HashMap<>();
        for (HashAlgoType ha : HashAlgoType.values()) {
            IssuerHashNameAndKey ih = new IssuerHashNameAndKey(ha, ha.hash(encodedName),
                    ha.hash(encodedKey));
            hashes.put(ha, ih);
        }
        return hashes;
    }

    public int getId() {
        return id;
    }

    public boolean matchHash(final HashAlgoType hashAlgo, final byte[] issuerNameHash,
            final byte[] issuerKeyHash) {
        IssuerHashNameAndKey issuerHash = issuerHashMap.get(hashAlgo);
        return (issuerHash == null) ? false
                : issuerHash.match(hashAlgo, issuerNameHash, issuerKeyHash);
    }

    public void setRevocationInfo(final Date revocationTime) {
        ParamUtil.requireNonNull("revocationTime", revocationTime);
        this.revocationInfo = new CertRevocationInfo(CrlReason.CA_COMPROMISE, revocationTime, null);
    }

    public void setCrlInfo(CrlInfo crlInfo) {
        this.crlInfo = crlInfo;
    }

    public CrlInfo getCrlInfo() {
        return crlInfo;
    }

    public CertRevocationInfo getRevocationInfo() {
        return revocationInfo;
    }

    public Date getNotBefore() {
        return notBefore;
    }

    public X509Certificate getCert() {
        return cert;
    }

    public Collection<IssuerHashNameAndKey> getIssuerHashNameAndKeys() {
        return Collections.unmodifiableCollection(issuerHashMap.values());
    }

    public IssuerHashNameAndKey getIssuerHashNameAndKey(final HashAlgoType hashAlgo) {
        return issuerHashMap.get(hashAlgo);
    }
}