/*
    * 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.slf4j.impl;
  
  import static org.apache.maven.shared.utils.logging.MessageUtils.buffer;
  import static org.apache.maven.shared.utils.logging.MessageUtils.level;
  
  import java.io.PrintStream;
  
  /**
   * Logger for Maven, that support colorization of levels and stacktraces. This class implements 2 methods introduced in
   * slf4j-simple provider local copy.
   *
   * @since 3.5.0
   */
  public class MavenSimpleLogger extends SimpleLogger {
      MavenSimpleLogger(String name) {
          super(name);
      }
  
      @Override
      protected String renderLevel(int level) {
          switch (level) {
              case LOG_LEVEL_TRACE:
                  return level().debug("TRACE");
              case LOG_LEVEL_DEBUG:
                  return level().debug("DEBUG");
              case LOG_LEVEL_INFO:
                  return level().info("INFO");
              case LOG_LEVEL_WARN:
                  return level().warning("WARNING");
              case LOG_LEVEL_ERROR:
              default:
                  return level().error("ERROR");
          }
      }
  
      @Override
      protected void writeThrowable(Throwable t, PrintStream stream) {
          if (t == null) {
              return;
          }
          stream.print(buffer().failure(t.getClass().getName()));
          if (t.getMessage() != null) {
              stream.print(": ");
              stream.print(buffer().failure(t.getMessage()));
          }
          stream.println();
  
          while (t != null) {
              for (StackTraceElement e : t.getStackTrace()) {
                  stream.print("    ");
                  stream.print(buffer().strong("at"));
                  stream.print(" " + e.getClassName() + "." + e.getMethodName());
                  stream.print(buffer().a(" (").strong(getLocation(e)).a(")"));
                  stream.println();
              }
  
              t = t.getCause();
              if (t != null) {
                  stream.print(buffer().strong("Caused by").a(": ").a(t.getClass().getName()));
                  if (t.getMessage() != null) {
                      stream.print(": ");
                      stream.print(buffer().failure(t.getMessage()));
                  }
                  stream.println();
              }
          }
      }
  
      protected String getLocation(final StackTraceElement e) {
          assert e != null;
  
          if (e.isNativeMethod()) {
              return "Native Method";
          } else if (e.getFileName() == null) {
              return "Unknown Source";
          } else if (e.getLineNumber() >= 0) {
              return String.format("%s:%s", e.getFileName(), e.getLineNumber());
          } else {
              return e.getFileName();
          }
      }
 }