Copyright (c) 2006, 2012 IBM Corporation and others.
This program and the accompanying materials
are made available under the terms of the Eclipse Public License 2.0
which accompanies this distribution, and is available at
https://www.eclipse.org/legal/epl-2.0/
SPDX-License-Identifier: EPL-2.0
Contributors:
    IBM Corporation - initial API and implementation
/*******************************************************************************
 * Copyright (c) 2006, 2012 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.osgi.internal.log;

import java.io.File;
import java.io.IOException;
import java.io.Writer;
import org.eclipse.equinox.log.Logger;
import org.eclipse.osgi.framework.log.FrameworkLog;
import org.eclipse.osgi.framework.log.FrameworkLogEntry;
import org.osgi.framework.Bundle;
import org.osgi.framework.FrameworkEvent;
import org.osgi.framework.ServiceFactory;
import org.osgi.framework.ServiceRegistration;
import org.osgi.service.log.LogService;

class EquinoxLogFactory implements ServiceFactory<FrameworkLog> {
	final EquinoxLogWriter defaultWriter;
	final LogServiceManager logManager;

	public EquinoxLogFactory(EquinoxLogWriter defaultWriter, LogServiceManager logManager) {
		this.defaultWriter = defaultWriter;
		this.logManager = logManager;
	}

	@Override
	public FrameworkLog getService(final Bundle bundle, ServiceRegistration<FrameworkLog> registration) {
		return createFrameworkLog(bundle, defaultWriter);
	}

	FrameworkLog createFrameworkLog(Bundle bundle, EquinoxLogWriter eclipseWriter) {
		final EquinoxLogWriter logWriter = eclipseWriter == null ? defaultWriter : eclipseWriter;
		final Logger logger = bundle == null ? logManager.getSystemBundleLog().getLogger(eclipseWriter.getLoggerName()) : logManager.getSystemBundleLog().getLogger(bundle, logWriter.getLoggerName());
		return new FrameworkLog() {

			@Override
			public void setWriter(Writer newWriter, boolean append) {
				logWriter.setWriter(newWriter, append);
			}

			@Override
			public void setFile(File newFile, boolean append) throws IOException {
				logWriter.setFile(newFile, append);
			}

			@Override
			public void setConsoleLog(boolean consoleLog) {
				logWriter.setConsoleLog(consoleLog);
			}

			@Override
			public void log(FrameworkLogEntry logEntry) {
				logger.log(logEntry, convertLevel(logEntry), logEntry.getMessage(), logEntry.getThrowable());
			}

			@Override
			public void log(FrameworkEvent frameworkEvent) {
				Bundle b = frameworkEvent.getBundle();
				Throwable t = frameworkEvent.getThrowable();
				String entry = b.getSymbolicName() == null ? b.getLocation() : b.getSymbolicName();
				int severity;
				switch (frameworkEvent.getType()) {
					case FrameworkEvent.INFO :
						severity = FrameworkLogEntry.INFO;
						break;
					case FrameworkEvent.ERROR :
						severity = FrameworkLogEntry.ERROR;
						break;
					case FrameworkEvent.WARNING :
						severity = FrameworkLogEntry.WARNING;
						break;
					default :
						severity = FrameworkLogEntry.OK;
				}
				FrameworkLogEntry logEntry = new FrameworkLogEntry(entry, severity, 0, "", 0, t, null); //$NON-NLS-1$
				log(logEntry);
			}

			@Override
			public File getFile() {
				return logWriter.getFile();
			}

			@Override
			public void close() {
				logWriter.close();
			}
		};
	}

	@Override
	public void ungetService(Bundle bundle, ServiceRegistration<FrameworkLog> registration, FrameworkLog service) {
		// nothing
	}

	@SuppressWarnings("deprecation")
	static int convertLevel(FrameworkLogEntry logEntry) {
		switch (logEntry.getSeverity()) {
			case FrameworkLogEntry.ERROR :
				return LogService.LOG_ERROR;
			case FrameworkLogEntry.WARNING :
				return LogService.LOG_WARNING;
			case FrameworkLogEntry.INFO :
				return LogService.LOG_INFO;
			case FrameworkLogEntry.OK :
				return LogService.LOG_DEBUG;
			case FrameworkLogEntry.CANCEL :
			default :
				return 32; // unknown
		}
	}
}