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/*
 * Copyright 1999-2011 Alibaba Group.
 *  
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *  
 *      http://www.apache.org/licenses/LICENSE-2.0
 *  
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.dubbo.common.logger.log4j2;

import com.alibaba.dubbo.common.logger.Level;
import com.alibaba.dubbo.common.logger.Logger;
import com.alibaba.dubbo.common.logger.LoggerAdapter;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.core.Appender;
import org.apache.logging.log4j.core.LoggerContext;
import org.apache.logging.log4j.core.appender.FileAppender;
import org.apache.logging.log4j.core.config.Configuration;
import org.apache.logging.log4j.core.config.LoggerConfig;
import org.slf4j.LoggerFactory;

import java.io.File;
import java.util.Map;

/**
 * @author zhuxiaolei.github.io 2017年5月17日 下午6:27:33
 */
public class Log4j2LoggerAdapter implements LoggerAdapter {
	private File 			file;

	public Log4j2LoggerAdapter() {
		try {
			org.apache.logging.log4j.Logger logger = LogManager.getLogger();
			if (logger != null) {
				Map appenderMap = ((org.apache.logging.log4j.core.Logger) logger).getAppenders();
				for (Map.Entry entry : appenderMap.entrySet()) {
					if (entry.getValue() instanceof FileAppender) {
						String filename = ((FileAppender) entry.getValue()).getFileName();
						file = new File(filename);
						break;
					}
				}
			}
		} catch (Throwable t) {
		}
	}

	public Logger getLogger(String key) {
		return new Log4j2Logger(LoggerFactory.getLogger(key));
	}

	public Logger getLogger(Class key) {
		return new Log4j2Logger(LoggerFactory.getLogger(key));
	}

	public void setLevel(Level level) {
		LoggerContext ctx = (LoggerContext) LogManager.getContext(false);
		Configuration config = ctx.getConfiguration();
		LoggerConfig loggerConfig = config.getLoggerConfig(LogManager.ROOT_LOGGER_NAME);
		loggerConfig.setLevel(toLog4jLevel(level));
		ctx.updateLoggers();
	}

	public Level getLevel() {
		LoggerContext ctx = (LoggerContext) LogManager.getContext(false);
		Configuration config = ctx.getConfiguration();
		LoggerConfig loggerConfig = config.getLoggerConfig(LogManager.ROOT_LOGGER_NAME);
		return fromLog4jLevel(loggerConfig.getLevel());
	}

	public File getFile() {
		return file;
	}

	public void setFile(File file) {
		this.file = file;
	}

	public static org.apache.logging.log4j.Level toLog4jLevel(Level level) {
		if (level == Level.ALL)
			return org.apache.logging.log4j.Level.ALL;
		if (level == Level.TRACE)
			return org.apache.logging.log4j.Level.TRACE;
		if (level == Level.DEBUG)
			return org.apache.logging.log4j.Level.DEBUG;
		if (level == Level.INFO)
			return org.apache.logging.log4j.Level.INFO;
		if (level == Level.WARN)
			return org.apache.logging.log4j.Level.WARN;
		if (level == Level.ERROR)
			return org.apache.logging.log4j.Level.ERROR;
		return org.apache.logging.log4j.Level.OFF;
	}

	public static Level fromLog4jLevel(org.apache.logging.log4j.Level level) {
		if (level == org.apache.logging.log4j.Level.ALL)
			return Level.ALL;
		if (level == org.apache.logging.log4j.Level.TRACE)
			return Level.TRACE;
		if (level == org.apache.logging.log4j.Level.DEBUG)
			return Level.DEBUG;
		if (level == org.apache.logging.log4j.Level.INFO)
			return Level.INFO;
		if (level == org.apache.logging.log4j.Level.WARN)
			return Level.WARN;
		if (level == org.apache.logging.log4j.Level.ERROR)
			return Level.ERROR;
		return Level.OFF;
	}
}