/*
 *
 * 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.commons.common.util;

import java.math.BigInteger;

import javax.xml.bind.JAXBException;

import org.slf4j.Logger;

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

public class LogUtil {

    private LogUtil() {
    }

    public static void error(final Logger log, final Throwable th) {
        if (!log.isErrorEnabled()) {
            return;
        }

        // this operation is expensive, hence don't abuse it.
        StackTraceElement[] traces = Thread.currentThread().getStackTrace();
        if (traces.length > 2) {
            StackTraceElement trace = traces[2];
            log.error("({} {}), {}: {}", trace.getMethodName(), trace.getLineNumber(),
                    th.getClass().getName(), getMessage(th));
        } else {
            log.error("{}: {}", th.getClass().getName(), getMessage(th));
        }
        log.debug("Exception", th);
    }

    public static void error(final Logger log, final Throwable th, final String msg) {
        if (!log.isErrorEnabled()) {
            return;
        }

        // this operation is expensive, hence don't abuse it.
        StackTraceElement[] traces = Thread.currentThread().getStackTrace();
        if (traces.length > 2) {
            StackTraceElement trace = traces[2];
            log.error("({} {}) {}, {}: {}", trace.getMethodName(), trace.getLineNumber(), msg,
                    th.getClass().getName(), getMessage(th));
        } else {
            log.error("{}, {}: {}", msg, th.getClass().getName(), getMessage(th));
        }
        log.debug(msg, th);
    }

    public static void warn(final Logger log, final Throwable th) {
        if (!log.isWarnEnabled()) {
            return;
        }

        // this operation is expensive, don't abuse it.
        StackTraceElement[] traces = Thread.currentThread().getStackTrace();
        if (traces.length > 2) {
            StackTraceElement trace = traces[2];
            log.error("({} {}), {}: {}", trace.getMethodName(), trace.getLineNumber(),
                    th.getClass().getName(), getMessage(th));
        } else {
            log.warn("{}: {}", th.getClass().getName(), getMessage(th));
        }
        log.debug("Exception", th);
    }

    public static void warn(final Logger log, final Throwable th, final String msg) {
        if (!log.isWarnEnabled()) {
            return;
        }

        // this operation is expensive, hence don't abuse it.
        StackTraceElement[] traces = Thread.currentThread().getStackTrace();
        if (traces.length > 2) {
            StackTraceElement trace = traces[2];
            log.warn("({} {}) {}, {}: {}", trace.getMethodName(), trace.getLineNumber(), msg,
                    th.getClass().getName(), getMessage(th));
        } else {
            log.warn("{}, {}: {}", msg, th.getClass().getName(), getMessage(th));
        }
        log.debug(msg, th);
    }

    /**
     * Formats certificate serial number.
     * @param serialNumber certificate serial number
     * @return formatted certificate serial number
     */
    public static String formatCsn(final BigInteger serialNumber) {
        return "0x" + serialNumber.toString(16);
    }

    private static String getMessage(final Throwable th) {
        return (th instanceof JAXBException)
            ? XmlUtil.getMessage((JAXBException) th) : th.getMessage();
    }

}