package jalview.bin;

import jalview.log.JLogger;
import jalview.log.JLoggerI.LogLevel;
import jalview.log.JLoggerLog4j;
import jalview.util.ChannelProperties;
import jalview.util.Log4j;
import jalview.util.Platform;

public class Console
{

  public static JLoggerLog4j log;

  public static void debug(String message, Throwable t)
  {
    if (Console.initLogger())
    {
      log.debug(message, t);
    }
    else
    {
      System.out.println(message);
      t.printStackTrace();
    }
  
  }

  public static void info(String message)
  {
    if (Console.initLogger())
    {
      log.info(message, null);
    }
    else
    {
      System.out.println(message);
    }
  
  }

  public static void trace(String message, Throwable t)
  {
    if (Console.initLogger())
    {
      log.trace(message, t);
    }
    else
    {
      System.out.println(message);
      t.printStackTrace();
    }
  }

  public static void debug(String message)
  {
    if (Console.initLogger())
    {
      log.debug(message, null);
    }
    else
    {
      System.out.println(message);
    }
  
  }

  public static void info(String message, Throwable t)
  {
    if (Console.initLogger())
    {
      log.info(message, t);
    }
    else
    {
      System.out.println(message);
      t.printStackTrace();
    }
  
  }

  public static void warn(String message)
  {
    if (Console.initLogger())
    {
      log.warn(message, null);
    }
    else
    {
      System.out.println(message);
    }
  
  }

  public static void trace(String message)
  {
    if (Console.initLogger())
    {
      log.trace(message, null);
    }
    else
    {
      System.out.println(message);
    }
  }

  public static void warn(String message, Throwable t)
  {
    if (Console.initLogger())
    {
      log.warn(message, t);
    }
    else
    {
      System.out.println(message);
      t.printStackTrace();
    }
  
  }

  public static void error(String message)
  {
    if (Console.initLogger())
    {
      log.error(message, null);
    }
    else
    {
      System.err.println(message);
    }
  
  }

  public static void error(String message, Throwable t)
  {
    if (Console.initLogger())
    {
      log.error(message, t);
    }
    else
    {
      System.err.println(message);
      t.printStackTrace(System.err);
    }
  
  }

  public static void fatal(String message)
  {
    if (Console.initLogger())
    {
      log.fatal(message, null);
    }
    else
    {
      System.err.println(message);
    }
  
  }

  public static void fatal(String message, Throwable t)
  {
    if (Console.initLogger())
    {
      log.fatal(message, t);
    }
    else
    {
      System.err.println(message);
      t.printStackTrace(System.err);
    }
  
  }

  public static boolean isDebugEnabled()
  {
    return log == null ? false : log.isDebugEnabled();
  }

  public static boolean isTraceEnabled()
  {
    return log == null ? false : log.isTraceEnabled();
  }

  public static JLogger.LogLevel getCachedLogLevel()
  {
    return Console.getCachedLogLevel(Cache.JALVIEWLOGLEVEL);
  }

  public static JLogger.LogLevel getCachedLogLevel(String key)
  {
    return JLogger.toLevel(Cache.getDefault(key, "INFO"));
  }

  public static boolean initLogger()
  {
    if (log != null)
    {
      return true;
    }
    try
    {
      JLogger.LogLevel cachedLevel = getCachedLogLevel();
      if (!Platform.isJS())
      {
        Log4j.init(cachedLevel);
      }
      // log output
      // is laxis used? Does getLogger do anything without a Logger object?
      // Logger laxis = Log4j.getLogger("org.apache.axis", myLevel);
      JLoggerLog4j.getLogger("org.apache.axis", cachedLevel);
  
      // The main application logger
      log = JLoggerLog4j.getLogger(Cache.JALVIEW_LOGGER_NAME, cachedLevel);
    } catch (NoClassDefFoundError e)
    {
      System.err.println("Could not initialise the logger framework");
      e.printStackTrace();
    }
  
    // Test message
    if (log != null)
    {
      // Logging test message should got through the logger object
      if (log.loggerExists())
        log.debug(Console.LOGGING_TEST_MESSAGE);
      // Tell the user that debug is enabled
      debug(ChannelProperties.getProperty("app_name")
              + " Debugging Output Follows.");
      return true;
    }
    else
    {
      return false;
    }
  }

  public final static String LOGGING_TEST_MESSAGE = "Logging to STDERR";

}