package org.slf4j.simple;
   
   import java.io.FileNotFoundException;
   import java.io.FileOutputStream;
   import java.io.InputStream;
   import java.io.PrintStream;
   import java.security.AccessController;
   import java.security.PrivilegedAction;
   import java.text.DateFormat;
  import java.text.SimpleDateFormat;
  import java.util.Properties;
  
  import org.slf4j.helpers.Util;
  import org.slf4j.simple.OutputChoice.OutputChoiceType;
  
  /**
   * This class holds configuration values for {@link SimpleLogger}. The
   * values are computed at runtime. See {@link SimpleLogger} documentation for
   * more information.
   * 
   * 
   * @author Ceki Gülcü
   * @author Scott Sanders
   * @author Rod Waldhoff
   * @author Robert Burrell Donkin
   * @author Cédrik LIME
   * 
   * @since 1.7.25
   */
  public class SimpleLoggerConfiguration {
  
      private static final String CONFIGURATION_FILE = "simplelogger.properties";
  
      static int DEFAULT_LOG_LEVEL_DEFAULT = SimpleLogger.LOG_LEVEL_INFO;
      int defaultLogLevel = DEFAULT_LOG_LEVEL_DEFAULT;
  
      private static final boolean SHOW_DATE_TIME_DEFAULT = false;
      boolean showDateTime = SHOW_DATE_TIME_DEFAULT;
  
      private static final String DATE_TIME_FORMAT_STR_DEFAULT = null;
      private static String dateTimeFormatStr = DATE_TIME_FORMAT_STR_DEFAULT;
  
      DateFormat dateFormatter = null;
  
      private static final boolean SHOW_THREAD_NAME_DEFAULT = true;
      boolean showThreadName = SHOW_THREAD_NAME_DEFAULT;
  
      /**
       * See https://jira.qos.ch/browse/SLF4J-499
       * @since 1.7.33 and 2.0.0-alpha6
       */
      private static final boolean SHOW_THREAD_ID_DEFAULT = false;
      boolean showThreadId = SHOW_THREAD_ID_DEFAULT;
      
      final static boolean SHOW_LOG_NAME_DEFAULT = true;
      boolean showLogName = SHOW_LOG_NAME_DEFAULT;
  
      private static final boolean SHOW_SHORT_LOG_NAME_DEFAULT = false;
      boolean showShortLogName = SHOW_SHORT_LOG_NAME_DEFAULT;
  
      private static final boolean LEVEL_IN_BRACKETS_DEFAULT = false;
      boolean levelInBrackets = LEVEL_IN_BRACKETS_DEFAULT;
  
      private static final String LOG_FILE_DEFAULT = "System.err";
      private String logFile = LOG_FILE_DEFAULT;
      OutputChoice outputChoice = null;
  
      private static final boolean CACHE_OUTPUT_STREAM_DEFAULT = false;
      private boolean cacheOutputStream = CACHE_OUTPUT_STREAM_DEFAULT;
  
      private static final String WARN_LEVELS_STRING_DEFAULT = "WARN";
      String warnLevelString = WARN_LEVELS_STRING_DEFAULT;
  
      private final Properties properties = new Properties();
  
      void init() {
          loadProperties();
  
          String defaultLogLevelString = getStringProperty(SimpleLogger.DEFAULT_LOG_LEVEL_KEY, null);
          if (defaultLogLevelString != null)
              defaultLogLevel = stringToLevel(defaultLogLevelString);
  
          showLogName = getBooleanProperty(SimpleLogger.SHOW_LOG_NAME_KEY, SimpleLoggerConfiguration.SHOW_LOG_NAME_DEFAULT);
          showShortLogName = getBooleanProperty(SimpleLogger.SHOW_SHORT_LOG_NAME_KEY, SHOW_SHORT_LOG_NAME_DEFAULT);
          showDateTime = getBooleanProperty(SimpleLogger.SHOW_DATE_TIME_KEY, SHOW_DATE_TIME_DEFAULT);
          showThreadName = getBooleanProperty(SimpleLogger.SHOW_THREAD_NAME_KEY, SHOW_THREAD_NAME_DEFAULT);
          showThreadId = getBooleanProperty(SimpleLogger.SHOW_THREAD_ID_KEY, SHOW_THREAD_ID_DEFAULT);
          dateTimeFormatStr = getStringProperty(SimpleLogger.DATE_TIME_FORMAT_KEY, DATE_TIME_FORMAT_STR_DEFAULT);
          levelInBrackets = getBooleanProperty(SimpleLogger.LEVEL_IN_BRACKETS_KEY, LEVEL_IN_BRACKETS_DEFAULT);
          warnLevelString = getStringProperty(SimpleLogger.WARN_LEVEL_STRING_KEY, WARN_LEVELS_STRING_DEFAULT);
  
          logFile = getStringProperty(SimpleLogger.LOG_FILE_KEY, logFile);
  
          cacheOutputStream = getBooleanProperty(SimpleLogger.CACHE_OUTPUT_STREAM_STRING_KEY, CACHE_OUTPUT_STREAM_DEFAULT);
          outputChoice = computeOutputChoice(logFile, cacheOutputStream);
  
          if (dateTimeFormatStr != null) {
              try {
                  dateFormatter = new SimpleDateFormat(dateTimeFormatStr);
             } catch (IllegalArgumentException e) {
                 Util.report("Bad date format in " + CONFIGURATION_FILE + "; will output relative time", e);
             }
         }
     }
 
     private void loadProperties() {
         // Add props from the resource simplelogger.properties
         InputStream in = AccessController.doPrivileged((PrivilegedAction<InputStream>) () -> {
             ClassLoader threadCL = Thread.currentThread().getContextClassLoader();
             if (threadCL != null) {
                 return threadCL.getResourceAsStream(CONFIGURATION_FILE);
             } else {
                 return ClassLoader.getSystemResourceAsStream(CONFIGURATION_FILE);
             }
         });
         if (null != in) {
             try {
                 properties.load(in);
             } catch (java.io.IOException e) {
                 // ignored
             } finally {
                 try {
                     in.close();
                 } catch (java.io.IOException e) {
                     // ignored
                 }
             }
         }
     }
 
     String getStringProperty(String name, String defaultValue) {
         String prop = getStringProperty(name);
         return (prop == null) ? defaultValue : prop;
     }
 
     boolean getBooleanProperty(String name, boolean defaultValue) {
         String prop = getStringProperty(name);
         return (prop == null) ? defaultValue : "true".equalsIgnoreCase(prop);
     }
 
     String getStringProperty(String name) {
         String prop = null;
         try {
             prop = System.getProperty(name);
         } catch (SecurityException e) {
             ; // Ignore
         }
         return (prop == null) ? properties.getProperty(name) : prop;
     }
 
     static int stringToLevel(String levelStr) {
         if ("trace".equalsIgnoreCase(levelStr)) {
             return SimpleLogger.LOG_LEVEL_TRACE;
         } else if ("debug".equalsIgnoreCase(levelStr)) {
             return SimpleLogger.LOG_LEVEL_DEBUG;
         } else if ("info".equalsIgnoreCase(levelStr)) {
             return SimpleLogger.LOG_LEVEL_INFO;
         } else if ("warn".equalsIgnoreCase(levelStr)) {
             return SimpleLogger.LOG_LEVEL_WARN;
         } else if ("error".equalsIgnoreCase(levelStr)) {
             return SimpleLogger.LOG_LEVEL_ERROR;
         } else if ("off".equalsIgnoreCase(levelStr)) {
             return SimpleLogger.LOG_LEVEL_OFF;
         }
         // assume INFO by default
         return SimpleLogger.LOG_LEVEL_INFO;
     }
 
     private static OutputChoice computeOutputChoice(String logFile, boolean cacheOutputStream) {
         if ("System.err".equalsIgnoreCase(logFile))
             if (cacheOutputStream)
                 return new OutputChoice(OutputChoiceType.CACHED_SYS_ERR);
             else
                 return new OutputChoice(OutputChoiceType.SYS_ERR);
         else if ("System.out".equalsIgnoreCase(logFile)) {
             if (cacheOutputStream)
                 return new OutputChoice(OutputChoiceType.CACHED_SYS_OUT);
             else
                 return new OutputChoice(OutputChoiceType.SYS_OUT);
         } else {
             try {
                 FileOutputStream fos = new FileOutputStream(logFile);
                 PrintStream printStream = new PrintStream(fos);
                 return new OutputChoice(printStream);
             } catch (FileNotFoundException e) {
                 Util.report("Could not open [" + logFile + "]. Defaulting to System.err", e);
                 return new OutputChoice(OutputChoiceType.SYS_ERR);
             }
         }
     }
 
 }