package at.gv.egovernment.moa.id.auth.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import at.gv.egovernment.moa.id.config.ConfigurationException;
import at.gv.egovernment.moa.id.config.auth.AuthConfigurationProvider;
import at.gv.egovernment.moa.id.monitoring.TestManager;
import at.gv.egovernment.moa.logging.Logger;
import at.gv.egovernment.moa.util.MiscUtil;

public class MonitoringServlet extends AuthServlet {

	private static final long serialVersionUID = 1L;
	
	  protected void doGet(HttpServletRequest req, HttpServletResponse resp)
			    throws ServletException, IOException {
		  
		  try {
			AuthConfigurationProvider config = AuthConfigurationProvider.getInstance();
			
			if (config.isMonitoringActive()) {
				Logger.debug("Monitoring Servlet received request");

				TestManager tests = TestManager.getInstance();
				
				
				List<String> error = tests.executeTests();
				if (error != null && error.size() > 0) {
					createErrorMessage(req, resp, error);
					
				} else {
					resp.setStatus(HttpServletResponse.SC_OK);
					resp.setContentType("text/html;charset=UTF-8");
					Logger.info("Monitoring Servlet finished without errors");
				}
					
			}
			  
		} catch (ConfigurationException e) {
			createErrorMessage(req, resp, Arrays.asList(e.getMessage()));
		}
	  }
	  
	  private void createErrorMessage(HttpServletRequest req, HttpServletResponse resp, List<String> errorMessage) {
		  Logger.warn("Monitoring Servlet found some Error: " + errorMessage);
		  resp.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
		  resp.setContentType("text/html;charset=UTF-8");
		  PrintWriter out;
		  try {
			  out = new PrintWriter(resp.getOutputStream());
			  for (String error : errorMessage)
				  out.write(error + "<br>");
			  out.flush();
			  
		  } catch (IOException e) {
			  Logger.warn("Internal Monitoring Servlet Error. ", e);
		  } 
	  }
}