/**
    * Logback: the reliable, generic, fast and flexible logging framework.
    * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
    *
    * This program and the accompanying materials are dual-licensed under
    * either the terms of the Eclipse Public License v1.0 as published by
    * the Eclipse Foundation
    *
    *   or (per the licensee's choosing)
   *
   * under the terms of the GNU Lesser General Public License version 2.1
   * as published by the Free Software Foundation.
   */
  package ch.qos.logback.classic.control;
  
  import java.util.LinkedList;
  
  import ch.qos.logback.classic.Level;
  import ch.qos.logback.core.CoreConstants;
  
  public class ScenarioMaker {
  
      private final static int AVERAGE_LOGGER_DEPTH = 4;
      private final static int LOGGER_DEPT_DEV = 2;
      // the frequency of a set levelInt event for every create logger event
      private final static int CREATE_LOGGER_TO_SET_LEVEL_FREQUENCY = 5;
      private final static int SECOND_SET_LEVEL_FREQUENCY = 3;
  
      private static long count = 0;
  
      /**
       * Makes a scenario with len logger creations. Logger names are generated
       * independently such that the overwhelming majority of logger names will be
       * unrelated to each other. Each logger creation may be followed with a randomly
       * generated set levelInt action on that logger.
       * 
       * @param len
       * @return
       */
      static public Scenario makeTypeAScenario(int len) {
          Scenario scenario = new Scenario();
          ;
          for (int i = 0; i < len; i++) {
              String loggerName = ScenarioRandomUtil.randomLoggerName(AVERAGE_LOGGER_DEPTH, LOGGER_DEPT_DEV);
              scenario.add(new CreateLogger(loggerName));
          }
          return scenario;
      }
  
      static public Scenario makeRealisticCreationScenario(int len) {
          Scenario scenario = new Scenario();
          LinkedList<String> queue = new LinkedList<String>();
          int loggerCreationCount = 0;
  
          // add an empty string to get going
          queue.add("");
  
          while (loggerCreationCount < len) {
              if ((count % 100) == 0) {
                  System.out.println("count=" + count);
              }
  
              String loggerName = (String) queue.removeFirst();
              int randomChildrenCount = ScenarioRandomUtil.randomChildrenCount(loggerName);
  
              if (randomChildrenCount == 0) {
                  scenario.add(new CreateLogger(loggerName));
                  addSetLevelSubScenario(scenario, loggerName);
                  loggerCreationCount++;
              } else {
                  for (int i = 0; i < randomChildrenCount; i++) {
                      String childName;
                      if (loggerName.equals("")) {
                          childName = ScenarioRandomUtil.randomId();
                          count += childName.length();
                      } else {
                          childName = loggerName + CoreConstants.DOT + ScenarioRandomUtil.randomId();
                          count += childName.length();
                      }
                      queue.add(childName);
                      addSetLevelSubScenario(scenario, loggerName);
                      loggerCreationCount++;
                  }
              }
          }
          return scenario;
      }
  
      static void addSetLevelSubScenario(Scenario scenario, String loggerName) {
          if (ScenarioRandomUtil.oneInFreq(CREATE_LOGGER_TO_SET_LEVEL_FREQUENCY)) {
              Level l = ScenarioRandomUtil.randomLevel();
              scenario.add(new SetLevel(l, loggerName));
              if (ScenarioRandomUtil.oneInFreq(SECOND_SET_LEVEL_FREQUENCY)) {
                  l = ScenarioRandomUtil.randomLevel();
                  scenario.add(new SetLevel(l, loggerName));
              }
          }
      }
  
 }