/*
 * ====================================================================
 * Copyright (c) 2004 TMate Software Ltd.  All rights reserved.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution.  The terms
 * are also available at http://tmate.org/svn/license.html.
 * If newer versions of this license are posted there, you may use a
 * newer version instead, at your option.
 * ====================================================================
 */

package org.tmatesoft.svn.util;

import java.io.File;
import java.io.InputStream;
import java.io.OutputStream;

/**
 * This class is used as a wrapper over a socket to write into local log files all data
 * that is received or sent via the socket.
 * 
 * @author TMate Software Ltd.
 */
public class DebugLog {

	private static DebugLogger ourLogger;
	private static final File ourSafeModeTrigger = new File(".javasvn.safemode");

	public static void setLogger(DebugLogger logger) {
		ourLogger = logger;
	}

	public static boolean isEnabled() {
		return getLogger() != null;
	}

	public static void log(String message) {
		if (getLogger() == null || !getLogger().isFineEnabled()) {
			return;
		}
		getLogger().logFine(message);
	}

	public static void logInfo(String message) {
		if (getLogger() == null || !getLogger().isInfoEnabled()) {
			return;
		}
		getLogger().logInfo(message);
	}

	public static void benchmark(String message) {
		if (getLogger() == null || !getLogger().isInfoEnabled()) {
			return;
		}
		getLogger().logInfo(message);
	}

	public static void error(String message) {
		if (getLogger() == null || !getLogger().isErrorEnabled()) {
			return;
		}
		getLogger().logError(message, null);
	}

	public static void error(Throwable th) {
		if (getLogger() == null || !getLogger().isErrorEnabled()) {
			return;
		}
		getLogger().logError(th.getMessage(), th);
	}

	public static boolean isGeneratorDisabled() {
		if (getLogger() == null) {
			return false;
		}
		if (isSafeModeDefault()) {
			// have to enable explicitly
			return !Boolean.getBoolean("javasvn.generator.enabled");
		}
		if (System.getProperty("javasvn.generator.enabled") == null) {
			return false;
		}
		return !Boolean.getBoolean("javasvn.generator.enabled");
	}

	public static LoggingInputStream getLoggingInputStream(String protocol, InputStream stream) {
		if (getLogger() == null) {
			return new LoggingInputStream(stream, null);
		}

		return getLogger().getLoggingInputStream(protocol, stream);
	}

	public static LoggingOutputStream getLoggingOutputStream(String protocol, OutputStream stream) {
		if (getLogger() == null) {
			return new LoggingOutputStream(stream, null);
		}

		return getLogger().getLoggingOutputStream(protocol, stream);
	}
	

	static boolean isSafeModeDefault() {
		if (getLogger() == null) {
			return false;
		}
		return ourSafeModeTrigger.exists();
	}

	private static DebugLogger getLogger() {
		if (ourLogger == null) {
			ourLogger = new DebugDefaultLogger();
		}
		return ourLogger;
	}

}