// --- BEGIN COPYRIGHT BLOCK ---
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; version 2 of the License.
//
// 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2007 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
package com.netscape.cms.logging;

import com.netscape.certsrv.logging.ILogger;
import com.netscape.certsrv.logging.LogCategory;
import com.netscape.certsrv.logging.LogEvent;
import com.netscape.certsrv.logging.LogSource;
import com.netscape.certsrv.logging.SignedAuditEvent;
import com.netscape.cmscore.apps.CMS;

/**
 * A class represents certificate server logger
 * implementation.
 * <P>
 *
 * @author thomask
 * @author mzhao
 * @version $Revision$, $Date$
 */
public class SignedAuditLogger extends Logger {

    public static org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(SignedAuditLogger.class);

    private final static SignedAuditLogger INSTANCE =
            new SignedAuditLogger();

    public SignedAuditLogger() {
        super(new SignedAuditEventFactory(),
                ILogger.EV_SIGNED_AUDIT,
                ILogger.S_SIGNED_AUDIT,
                ILogger.LL_SECURITY);
    }

    public static SignedAuditLogger getLogger() {
        return INSTANCE;
    }

    @Override
    public void log(LogCategory category, LogSource source, int level, String message,
            Object params[], boolean multiline) {

        // create event
        SignedAuditEvent event = (SignedAuditEvent) create(
                category, source, level, message, params, multiline);

        // parse attributes in message
        int start = 0;

        try {
            while (start < message.length()) {

                // find [name=value]
                int i = message.indexOf("[", start);
                if (i < 0)
                    break;

                int j = message.indexOf("=", i + 1);
                if (j < 0) {
                    throw new RuntimeException("Missing equal sign: " + message);
                }

                // get attribute name
                String name = message.substring(i + 1, j);

                int k = message.indexOf("]", j + 1);
                if (k < 0) {
                    throw new RuntimeException("Missing closing bracket: " + message);
                }

                // get attribute value
                String value = message.substring(j + 1, k);

                // store attribute in event
                event.setAttribute(name, value);

                start = k + 1;
            }

        } catch (Exception e) { //Catch any of our RunTime exceptions just so we can log it to the console
            System.err.println(CMS.getUserMessage("CMS_LOG_WRITE_FAILED", event.getEventType(), e.toString(), "Audit Event Failure!"));
            throw e;
        }

        mLogQueue.log(event);
    }

    @Override
    public void log(LogEvent event) {

        String messageID = event.getMessage();
        Object[] params = event.getParameters();

        // generate audit log message that contains the parameters
        String message = CMS.getLogMessage(messageID, params);

        log(category, source, level, message, null, ILogger.L_SINGLELINE);
    }

    @Override
    public void update(LogEvent event, LogSource source,
            int level, String message, Object params[], boolean multiline) {

        super.update(event, source, level, message, params, multiline);

        // split message into event type and actual message
        String eventType = null;
        message = message.trim();

        // message format: <type=...>:message
        int i = message.indexOf("<type=");

        if (i >= 0) { // message contains event type

            int j = message.indexOf(">:");
            eventType = message.substring(i + 6, j).trim();
            message = message.substring(j + 2).trim();

            logger.debug("SignedAuditLogger: event " + eventType);
        }

        event.setEventType(eventType);
        event.setMessage(message);
    }
}
