/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.logging.log4j.samples.app;

import java.util.List;
import java.util.Random;

import javax.servlet.http.HttpServletRequest;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.ThreadContext;
import org.apache.logging.log4j.core.util.Integers;
import org.apache.logging.log4j.samples.dto.AuditEvent;
import org.apache.logging.log4j.samples.dto.RequestContext;
import org.apache.logging.log4j.util.Strings;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;


/**
 * The Class LoggingController.
 */
@Controller
public class LoggingController {

    /**
     * The logger.
     */
    private static Logger logger = LogManager.getLogger(LoggingController.class);

    private volatile boolean generateLog;
    private final Random ran = new Random();

    private List<AuditEvent> events;
    private int timeBase = 1000;

    @RequestMapping(value = "/start.do", method = RequestMethod.GET)
    public ModelAndView startLogging(
        @RequestParam(value = "member", required = false, defaultValue = "fakemember") final String member,
        @RequestParam(value = "interval", required = false, defaultValue = "1000") final String interval,
        @RequestParam(value = "threads", required = false, defaultValue = "1") final String threadCount,
                      final HttpServletRequest servletRequest) {
        int numThreads = 1;
        if (Strings.isNotEmpty(threadCount)) {
            try {
                numThreads = Integers.parseInt(threadCount);
            } catch (final Exception ex) {
                System.out.println("Invalid threadCount specified: " + threadCount);
            }
        }
        if (Strings.isNotEmpty(interval)) {
            try {
                timeBase = Integer.parseInt(interval);
            } catch (final Exception ex) {
                System.out.println("Invalid interval specified: " + interval);
            }
        }
        System.out.println("STARTING - Using " + numThreads + " threads at interval: " + timeBase);

        if (events == null) {
            events = MockEventsSupplier.getAllEvents(member);
        }

        generateLog = true;

        for (int i = 0; i < numThreads; ++i) {
            (new Thread() {

                @Override
                public void run() {
                    ThreadContext.clearMap();

                    RequestContext.setSessionId("session1234");
                    RequestContext.setIpAddress("127.0.0.1");
                    RequestContext.setClientId("02121");
                    RequestContext.setProductName("IB");
                    RequestContext.setProductVersion("4.18.1");
                    RequestContext.setLocale("en_US");
                    RequestContext.setRegion("prod");
                    while (generateLog) {
                        // Generate rand number between 1 to 10
                        final int rand = ran.nextInt(9) + 1;

                        // Sleep for rand seconds
                        try {
                            Thread.sleep(rand * timeBase);
                        } catch (final InterruptedException e) {
                            logger.warn("WARN", e);
                        }

                        // Write rand number of logs
                        for (int i = 0; i < rand; i++) {
                            final int eventIndex = (Math.abs(ran.nextInt())) % events.size();
                            final AuditEvent event = events.get(eventIndex);
                            RequestContext.setUserId(member);
                            event.logEvent();

                            if ((rand % 4) == 1) {
                                logger.debug("DEBUG level logging.....");
                            } else if ((rand % 4) == 2) {
                                logger.info("INFO level logging.....");
                            } else if ((rand % 4) == 3) {
                                logger.warn("WARN level logging.....");
                            } else {
                                logger.error("ERROR level logging.....");
                            }
                        }

                    }
                    ThreadContext.cloneStack();
                }
            }).start();
        }

        return new ModelAndView("start.jsp");
    }

    @RequestMapping(value = "/stop.do", method = RequestMethod.GET)
    public ModelAndView stopLogging(final HttpServletRequest servletRequest) {
        generateLog = false;
        return new ModelAndView("stop.jsp");
    }

}
