/*
    * 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.maven.surefire.common.junit4;
  
  import org.apache.maven.surefire.api.report.SafeThrowable;
  import org.apache.maven.surefire.api.report.StackTraceWriter;
  import org.apache.maven.surefire.api.util.internal.ClassMethod;
  import org.apache.maven.surefire.report.SmartStackTraceParser;
  import org.junit.runner.notification.Failure;
  
  import static org.apache.maven.surefire.common.junit4.JUnit4ProviderUtil.toClassMethod;
  import static org.apache.maven.surefire.report.SmartStackTraceParser.stackTraceWithFocusOnClassAsString;
  
  /**
   * Writes out a specific {@link org.junit.runner.notification.Failure} for
   * surefire as a stacktrace.
   *
   * @author Karl M. Davis
   */
  public class JUnit4StackTraceWriter implements StackTraceWriter {
      private final Failure junitFailure;
  
      /**
       * Constructor.
       *
       * @param junitFailure the {@link Failure} that this will be operating on
       */
      public JUnit4StackTraceWriter(Failure junitFailure) {
          this.junitFailure = junitFailure;
      }
  
      /*
       * (non-Javadoc)
       *
       * @see org.apache.maven.surefire.report.StackTraceWriter#writeTraceToString()
       */
      @Override
      public String writeTraceToString() {
          Throwable t = junitFailure.getException();
          if (t != null) {
              String originalTrace = junitFailure.getTrace();
              if (isMultiLineExceptionMessage(t)) {
                  // SUREFIRE-986
                  StringBuilder builder = new StringBuilder(originalTrace);
                  String exc = t.getClass().getName() + ": ";
                  if (originalTrace.startsWith(exc)) {
                      builder.insert(exc.length(), '\n');
                  }
                  return builder.toString();
              }
              return originalTrace;
          }
          return "";
      }
  
      @Override
      public String smartTrimmedStackTrace() {
          Throwable exception = junitFailure.getException();
          ClassMethod classMethod = toClassMethod(junitFailure.getDescription());
          return exception == null
                  ? junitFailure.getMessage()
                  : new SmartStackTraceParser(classMethod.getClazz(), exception, classMethod.getMethod()).getString();
      }
  
      /**
       * At the moment, returns the same as {@link #writeTraceToString()}.
       *
       * @see StackTraceWriter#writeTrimmedTraceToString()
       */
      @Override
      public String writeTrimmedTraceToString() {
          String testClass = toClassMethod(junitFailure.getDescription()).getClazz();
          try {
              Throwable e = junitFailure.getException();
              return stackTraceWithFocusOnClassAsString(e, testClass);
          } catch (Throwable t) {
              return stackTraceWithFocusOnClassAsString(t, testClass);
          }
      }
  
      /**
       * Returns the exception associated with this failure.
       *
      * @see StackTraceWriter#getThrowable()
      */
     @Override
     public SafeThrowable getThrowable() {
         return new SafeThrowable(junitFailure.getException());
     }
 
     private static boolean isMultiLineExceptionMessage(Throwable t) {
         String msg = t.getLocalizedMessage();
         if (msg != null) {
             int countNewLines = 0;
             for (int i = 0, length = msg.length(); i < length; i++) {
                 if (msg.charAt(i) == '\n') {
                     if (++countNewLines == 2) {
                         break;
                     }
                 }
             }
             return countNewLines > 1 || countNewLines == 1 && !msg.trim().endsWith("\n");
         }
         return false;
     }
 }