/*
    * Licensed under the GPL License. You may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *   https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
    *
    * THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
    * WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
    * PURPOSE.
   */
  package psiprobe.tools.logging.log4j2;
  
  import java.lang.reflect.Method;
  
  import javax.servlet.ServletContext;
  
  import org.apache.commons.lang3.reflect.MethodUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import psiprobe.tools.logging.DefaultAccessor;
  
  /**
   * The Class Log4J2WebLoggerContextUtilsAccessor.
   */
  public class Log4J2WebLoggerContextUtilsAccessor extends DefaultAccessor {
  
    /** The Constant logger. */
    private static final Logger logger =
        LoggerFactory.getLogger(Log4J2WebLoggerContextUtilsAccessor.class);
  
    /**
     * Instantiates a new log4 j 2 web logger context utils accessor.
     *
     * @param cl the cl
     *
     * @throws ClassNotFoundException the class not found exception
     */
    public Log4J2WebLoggerContextUtilsAccessor(ClassLoader cl) throws ClassNotFoundException {
      logger.debug("Log4J2WebLoggerContextUtilsAccessor(): IN: cl={}", cl);
      Class<?> clazz = cl.loadClass("org.apache.logging.log4j.web.WebLoggerContextUtils");
      setTarget(clazz);
      logger.debug("Log4J2WebLoggerContextUtilsAccessor(): OUT: this={}", this);
    }
  
    /**
     * Gets the logger context configured for the given ServletContext.
     *
     * @param ctx the servlet context
     *
     * @return the root logger
     */
    public Log4J2LoggerContextAccessor getWebLoggerContext(ServletContext ctx) {
      logger.debug("getWebLoggerContext(): IN: ctx={}", ctx);
      Log4J2LoggerContextAccessor result = null;
  
      Class<?> clazz = (Class<?>) getTarget();
      Method getWebLoggerContext;
      try {
        getWebLoggerContext =
            MethodUtils.getAccessibleMethod(clazz, "getWebLoggerContext", ServletContext.class);
      } catch (Exception e) {
        logger.error("exception getting accessible method getWebLoggerContext", e);
        return result;
      }
  
      Object loggerContext;
      try {
        loggerContext = getWebLoggerContext.invoke(null, ctx);
      } catch (Exception e) {
        logger.error("exception getting logger context in getWebLoggerContext", e);
        return result;
      }
  
      result = new Log4J2LoggerContextAccessor();
      result.setTarget(loggerContext);
      result.setApplication(getApplication());
  
      logger.debug("getWebLoggerContext(): OUT: result={}", result);
      return result;
    }
  
  }