/*
    * 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.controllers.logs;
  
  import javax.inject.Inject;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.web.bind.ServletRequestUtils;
  import org.springframework.web.servlet.ModelAndView;
  import org.springframework.web.servlet.mvc.ParameterizableViewController;
  
  import psiprobe.beans.LogResolverBean;
  import psiprobe.tools.logging.LogDestination;
  
  /**
   * The Class AbstractLogHandlerController.
   */
  public abstract class AbstractLogHandlerController extends ParameterizableViewController {
  
    /** The Constant logger. */
    private static final Logger logger = LoggerFactory.getLogger(AbstractLogHandlerController.class);
  
    /** The log resolver. */
    @Inject
    private LogResolverBean logResolver;
  
    /**
     * Gets the log resolver.
     *
     * @return the log resolver
     */
    public LogResolverBean getLogResolver() {
      return logResolver;
    }
  
    /**
     * Sets the log resolver.
     *
     * @param logResolver the new log resolver
     */
    public void setLogResolver(LogResolverBean logResolver) {
      this.logResolver = logResolver;
    }
  
    @Override
    protected ModelAndView handleRequestInternal(HttpServletRequest request,
        HttpServletResponse response) throws Exception {
  
      String logType = ServletRequestUtils.getStringParameter(request, "logType");
      String webapp = ServletRequestUtils.getStringParameter(request, "webapp");
      boolean context = ServletRequestUtils.getBooleanParameter(request, "context", false);
      boolean root = ServletRequestUtils.getBooleanParameter(request, "root", false);
      String logName = ServletRequestUtils.getStringParameter(request, "logName");
      String logIndex = ServletRequestUtils.getStringParameter(request, "logIndex");
  
      LogDestination dest =
          logResolver.getLogDestination(logType, webapp, context, root, logName, logIndex);
  
      ModelAndView modelAndView = null;
      boolean logFound = false;
      if (dest != null) {
        if (dest.getFile() != null && dest.getFile().exists()) {
          modelAndView = handleLogFile(request, response, dest);
          logFound = true;
        } else {
          logger.error("{}: file not found", dest.getFile());
        }
      } else {
        logger.error("{}{} log{} not found", logType, root ? " root" : "",
            root ? "" : " '" + logName + "'");
      }
      if (!logFound) {
        response.sendError(404);
      }
      return modelAndView;
    }
  
    /**
     * Handle log file.
     *
     * @param request the request
     * @param response the response
     * @param logDest the log dest
     *
     * @return the model and view
     *
     * @throws Exception the exception
     */
   protected abstract ModelAndView handleLogFile(HttpServletRequest request,
       HttpServletResponse response, LogDestination logDest) throws Exception;
 
 }