/*
 * Conditions Of Use
 *
 * This software was developed by employees of the National Institute of
 * Standards and Technology (NIST), an agency of the Federal Government.
 * Pursuant to title 15 Untied States Code Section 105, works of NIST
 * employees are not subject to copyright protection in the United States
 * and are considered to be in the public domain.  As a result, a formal
 * license is not needed to use the software.
 *
 * This software is provided by NIST as a service and is expressly
 * provided "AS IS."  NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
 * OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
 * AND DATA ACCURACY.  NIST does not warrant or make any representations
 * regarding the use of the software or the results thereof, including but
 * not limited to the correctness, accuracy, reliability or usefulness of
 * the software.
 *
 * Permission to use this software is contingent upon your acceptance
 * of the terms of this agreement
 *
 * .
 *
 */
/*******************************************************************************
 * Product of NIST/ITL Advanced Networking Technologies Division (ANTD).       *
 ******************************************************************************/

package gov.nist.javax.sip.stack;

import gov.nist.core.ServerLogger;
import gov.nist.core.StackLogger;
import gov.nist.javax.sip.LogRecord;
import gov.nist.javax.sip.header.CallID;
import gov.nist.javax.sip.message.SIPMessage;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Properties;

import javax.sip.SipStack;
import javax.sip.header.TimeStampHeader;

// BEGIN android-deleted
// import org.apache.log4j.Level;
// import org.apache.log4j.Logger;
// END android-deleted

/**
 * Log file wrapper class. Log messages into the message trace file and also write the log into
 * the debug file if needed. This class keeps an XML formatted trace around for later access via
 * RMI. The trace can be viewed with a trace viewer (see tools.traceviewerapp).
 *
 * @version 1.2 $Revision: 1.39 $ $Date: 2009/11/11 14:00:58 $
 *
 * @author M. Ranganathan <br/>
 *
 *
 */
public class ServerLog implements ServerLogger {

    private boolean logContent;

    protected StackLogger stackLogger;

    /**
     * Name of the log file in which the trace is written out (default is null)
     */
    private String logFileName;

    /**
     * Print writer that is used to write out the log file.
     */
    private PrintWriter printWriter;

    /**
     * Set auxililary information to log with this trace.
     */
    private String auxInfo;

    private String description;

    private String stackIpAddress;

    private SIPTransactionStack sipStack;

    private Properties configurationProperties;

    public ServerLog() {
        // Debug log file. Whatever gets logged by us also makes its way into debug log.
    }

    private void setProperties(Properties configurationProperties) {
        this.configurationProperties = configurationProperties;
        // Set a descriptive name for the message trace logger.
        this.description = configurationProperties.getProperty("javax.sip.STACK_NAME");
        this.stackIpAddress = configurationProperties.getProperty("javax.sip.IP_ADDRESS");
        this.logFileName = configurationProperties.getProperty("gov.nist.javax.sip.SERVER_LOG");
        String logLevel = configurationProperties.getProperty("gov.nist.javax.sip.TRACE_LEVEL");
        String logContent = configurationProperties
                .getProperty("gov.nist.javax.sip.LOG_MESSAGE_CONTENT");

        this.logContent = (logContent != null && logContent.equals("true"));

        if (logLevel != null) {
            if (logLevel.equals("LOG4J")) {
                // if TRACE_LEVEL property is specified as
                // "LOG4J" then, set the traceLevel based on
                // the log4j effective log level.

                // check whether a Log4j logger name has been
                // specified. if not, use the stack name as the default
                // logger name.

                // BEGIN android-deleted
                /*
                Logger logger = Logger.getLogger(configurationProperties.getProperty(
                        "gov.nist.javax.sip.LOG4J_LOGGER_NAME", this.description));
                Level level = logger.getEffectiveLevel();
                if (level == Level.OFF) {
                    this.setTraceLevel(0);
                } else if (level.isGreaterOrEqual(Level.DEBUG)) {
                    this.setTraceLevel(TRACE_DEBUG);
                } else if (level.isGreaterOrEqual(Level.INFO)) {
                    this.setTraceLevel(TRACE_MESSAGES);
                } else if (level.isGreaterOrEqual(Level.WARN)) {
                    this.setTraceLevel(TRACE_EXCEPTION);
                }
                */
                // END android-deleted
            } else {
                try {
                    int ll;
                    if (logLevel.equals("DEBUG")) {
                        ll = TRACE_DEBUG;
                    } else if (logLevel.equals("INFO")) {
                        ll = TRACE_MESSAGES;
                    } else if (logLevel.equals("ERROR")) {
                        ll = TRACE_EXCEPTION;
                    } else if (logLevel.equals("NONE") || logLevel.equals("OFF")) {
                        ll = TRACE_NONE;
                    } else {
                        ll = Integer.parseInt(logLevel);
                    }

                    this.setTraceLevel(ll);
                } catch (NumberFormatException ex) {
                    System.out.println("ServerLog: WARNING Bad integer " + logLevel);
                    System.out.println("logging dislabled ");
                    this.setTraceLevel(0);
                }
            }
        }
        checkLogFile();

    }

    public void setStackIpAddress(String ipAddress) {
        this.stackIpAddress = ipAddress;
    }

    // public static boolean isWebTesterCatchException=false;
    // public static String webTesterLogFile=null;

    /**
     * default trace level
     */
    protected int traceLevel = TRACE_MESSAGES;

    public synchronized void closeLogFile() {
        if (printWriter != null) {
            printWriter.close();
            printWriter = null;
        }
    }

    public void checkLogFile() {
        if (logFileName == null || traceLevel < TRACE_MESSAGES) {
            // Dont create a log file if tracing is
            // disabled.
            return;
        }
        try {
            File logFile = new File(logFileName);
            if (!logFile.exists()) {
                logFile.createNewFile();
                printWriter = null;
            }
            // Append buffer to the end of the file unless otherwise specified
            // by the user.
            if (printWriter == null) {
                boolean overwrite = Boolean.valueOf(
                    configurationProperties.getProperty(
                        "gov.nist.javax.sip.SERVER_LOG_OVERWRITE"));

                FileWriter fw = new FileWriter(logFileName, !overwrite);

                printWriter = new PrintWriter(fw, true);
                printWriter.println("<!-- "
                        + "Use the  Trace Viewer in src/tools/tracesviewer to"
                        + " view this  trace  \n"
                        + "Here are the stack configuration properties \n"
                        + "javax.sip.IP_ADDRESS= "
                        + configurationProperties.getProperty("javax.sip.IP_ADDRESS") + "\n"
                        + "javax.sip.STACK_NAME= "
                        + configurationProperties.getProperty("javax.sip.STACK_NAME") + "\n"
                        + "javax.sip.ROUTER_PATH= "
                        + configurationProperties.getProperty("javax.sip.ROUTER_PATH") + "\n"
                        + "javax.sip.OUTBOUND_PROXY= "
                        + configurationProperties.getProperty("javax.sip.OUTBOUND_PROXY") + "\n"
                        + "-->");
                printWriter.println("<description\n logDescription=\"" + description
                        + "\"\n name=\""
                        + configurationProperties.getProperty("javax.sip.STACK_NAME")
                        + "\"\n auxInfo=\"" + auxInfo + "\"/>\n ");
                if (auxInfo != null) {

                    if (sipStack.isLoggingEnabled()) {
                        stackLogger
                                .logDebug("Here are the stack configuration properties \n"
                                        + "javax.sip.IP_ADDRESS= "
                                        + configurationProperties
                                                .getProperty("javax.sip.IP_ADDRESS")
                                        + "\n"
                                        + "javax.sip.ROUTER_PATH= "
                                        + configurationProperties
                                                .getProperty("javax.sip.ROUTER_PATH")
                                        + "\n"
                                        + "javax.sip.OUTBOUND_PROXY= "
                                        + configurationProperties
                                                .getProperty("javax.sip.OUTBOUND_PROXY")
                                        + "\n"
                                        + "gov.nist.javax.sip.CACHE_CLIENT_CONNECTIONS= "
                                        + configurationProperties
                                                .getProperty("gov.nist.javax.sip.CACHE_CLIENT_CONNECTIONS")
                                        + "\n"
                                        + "gov.nist.javax.sip.CACHE_SERVER_CONNECTIONS= "
                                        + configurationProperties
                                                .getProperty("gov.nist.javax.sip.CACHE_SERVER_CONNECTIONS")
                                        + "\n"
                                        + "gov.nist.javax.sip.REENTRANT_LISTENER= "
                                        + configurationProperties
                                                .getProperty("gov.nist.javax.sip.REENTRANT_LISTENER")
                                        + "gov.nist.javax.sip.THREAD_POOL_SIZE= "
                                        + configurationProperties
                                                .getProperty("gov.nist.javax.sip.THREAD_POOL_SIZE")
                                        + "\n");
                        stackLogger.logDebug(" ]]> ");
                        stackLogger.logDebug("</debug>");
                        stackLogger.logDebug("<description\n logDescription=\"" + description
                                + "\"\n name=\"" + stackIpAddress + "\"\n auxInfo=\"" + auxInfo
                                + "\"/>\n ");
                        stackLogger.logDebug("<debug>");
                        stackLogger.logDebug("<![CDATA[ ");
                    }
                } else {

                    if (sipStack.isLoggingEnabled()) {
                        stackLogger.logDebug("Here are the stack configuration properties \n"
                                + configurationProperties + "\n");
                        stackLogger.logDebug(" ]]>");
                        stackLogger.logDebug("</debug>");
                        stackLogger.logDebug("<description\n logDescription=\"" + description
                                + "\"\n name=\"" + stackIpAddress + "\" />\n");
                        stackLogger.logDebug("<debug>");
                        stackLogger.logDebug("<![CDATA[ ");
                    }
                }
            }
        } catch (IOException ex) {

        }
    }

    /**
     * Global check for whether to log or not. To minimize the time return false here.
     *
     * @return true -- if logging is globally enabled and false otherwise.
     *
     */
    public boolean needsLogging() {
        return logFileName != null;
    }

    /**
     * Set the log file name
     *
     * @param name is the name of the log file to set.
     */
    public void setLogFileName(String name) {
        logFileName = name;
    }

    /**
     * return the name of the log file.
     */
    public String getLogFileName() {
        return logFileName;
    }

    /**
     * Log a message into the log file.
     *
     * @param message message to log into the log file.
     */
    private void logMessage(String message) {
        // String tname = Thread.currentThread().getName();
        checkLogFile();
        String logInfo = message;
        if (printWriter != null) {
            printWriter.println(logInfo);
        }
        if (sipStack.isLoggingEnabled()) {
            stackLogger.logInfo(logInfo);

        }
    }

    private void logMessage(String message, String from, String to, boolean sender,
            String callId, String firstLine, String status, String tid, long time,
            long timestampVal) {

        LogRecord log = this.sipStack.logRecordFactory.createLogRecord(message, from, to, time,
                sender, firstLine, tid, callId, timestampVal);
        if (log != null)
            logMessage(log.toString());
    }

    /**
     * Log a message into the log directory.
     *
     * @param message a SIPMessage to log
     * @param from from header of the message to log into the log directory
     * @param to to header of the message to log into the log directory
     * @param sender is the server the sender
     * @param time is the time to associate with the message.
     */
    public void logMessage(SIPMessage message, String from, String to, boolean sender, long time) {
        checkLogFile();
        if (message.getFirstLine() == null)
            return;
        CallID cid = (CallID) message.getCallId();
        String callId = null;
        if (cid != null)
            callId = cid.getCallId();
        String firstLine = message.getFirstLine().trim();
        String inputText = (logContent ? message.encode() : message.encodeMessage());
        String tid = message.getTransactionId();
        TimeStampHeader tsHdr = (TimeStampHeader) message.getHeader(TimeStampHeader.NAME);
        long tsval = tsHdr == null ? 0 : tsHdr.getTime();
        logMessage(inputText, from, to, sender, callId, firstLine, null, tid, time, tsval);
    }

    /**
     * Log a message into the log directory.
     *
     * @param message a SIPMessage to log
     * @param from from header of the message to log into the log directory
     * @param to to header of the message to log into the log directory
     * @param status the status to log.
     * @param sender is the server the sender or receiver (true if sender).
     * @param time is the reception time.
     */
    public void logMessage(SIPMessage message, String from, String to, String status,
            boolean sender, long time) {
        checkLogFile();
        CallID cid = (CallID) message.getCallId();
        String callId = null;
        if (cid != null)
            callId = cid.getCallId();
        String firstLine = message.getFirstLine().trim();
        String encoded = (logContent ? message.encode() : message.encodeMessage());
        String tid = message.getTransactionId();
        TimeStampHeader tshdr = (TimeStampHeader) message.getHeader(TimeStampHeader.NAME);
        long tsval = tshdr == null ? 0 : tshdr.getTime();
        logMessage(encoded, from, to, sender, callId, firstLine, status, tid, time, tsval);
    }

    /**
     * Log a message into the log directory. Time stamp associated with the message is the current
     * time.
     *
     * @param message a SIPMessage to log
     * @param from from header of the message to log into the log directory
     * @param to to header of the message to log into the log directory
     * @param status the status to log.
     * @param sender is the server the sender or receiver (true if sender).
     */
    public void logMessage(SIPMessage message, String from, String to, String status,
            boolean sender) {
        logMessage(message, from, to, status, sender, System.currentTimeMillis());
    }

    /**
     * Log an exception stack trace.
     *
     * @param ex Exception to log into the log file
     */

    public void logException(Exception ex) {
        if (traceLevel >= TRACE_EXCEPTION) {
            checkLogFile();
            ex.printStackTrace();
            if (printWriter != null)
                ex.printStackTrace(printWriter);

        }
    }

    /**
     * Set the trace level for the stack.
     *
     * @param level -- the trace level to set. The following trace levels are supported:
     *        <ul>
     *        <li> 0 -- no tracing </li>
     *
     * <li> 16 -- trace messages only </li>
     *
     * <li> 32 Full tracing including debug messages. </li>
     *
     * </ul>
     */
    public void setTraceLevel(int level) {
        traceLevel = level;
    }

    /**
     * Get the trace level for the stack.
     *
     * @return the trace level
     */
    public int getTraceLevel() {
        return traceLevel;
    }

    /**
     * Set aux information. Auxiliary information may be associated with the log file. This is
     * useful for remote logs.
     *
     * @param auxInfo -- auxiliary information.
     */
    public void setAuxInfo(String auxInfo) {
        this.auxInfo = auxInfo;
    }

	public void setSipStack(SipStack sipStack) {
		if(sipStack instanceof SIPTransactionStack) {
			this.sipStack = (SIPTransactionStack)sipStack;
	        this.stackLogger = this.sipStack.getStackLogger();
		}
		else
			throw new IllegalArgumentException("sipStack must be a SIPTransactionStack");
	}

	public void setStackProperties(Properties stackProperties) {
		setProperties(stackProperties);
	}
	
	public void setLevel(int jsipLoggingLevel) {
	    
	}

}