/*
    * 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.junitplatform;
  
  import java.io.PrintWriter;
  import java.io.StringWriter;
  import java.util.Objects;
  
  import org.apache.maven.surefire.api.report.SafeThrowable;
  import org.apache.maven.surefire.api.report.StackTraceWriter;
  import org.apache.maven.surefire.api.util.internal.StringUtils;
  import org.apache.maven.surefire.report.SmartStackTraceParser;
  
  /**
   * Write the trace out for a POJO test.
   *
   * @author <a href="mailto:brett@apache.org">Brett Porter</a>
   */
  public class DefaultStackTraceWriter implements StackTraceWriter {
      private final Throwable t;
  
      private final String testClass;
  
      private final String testMethod;
  
      public DefaultStackTraceWriter(String testClass, String testMethod, Throwable t) {
          this.testClass = testClass;
          this.testMethod = testMethod;
          this.t = t;
      }
  
      @Override
      public String writeTraceToString() {
          if (t != null) {
              StringWriter w = new StringWriter();
              try (PrintWriter stackTrace = new PrintWriter(w)) {
                  t.printStackTrace(stackTrace);
              }
              StringBuffer builder = w.getBuffer();
              if (isMultiLineExceptionMessage(t)) {
                  // SUREFIRE-986
                  String exc = t.getClass().getName() + ": ";
                  if (StringUtils.startsWith(builder, exc)) {
                      builder.insert(exc.length(), '\n');
                  }
              }
              return builder.toString();
          }
          return "";
      }
  
      @Override
      public String smartTrimmedStackTrace() {
          return t == null ? "" : new SmartStackTraceParser(testClass, t, testMethod).getString();
      }
  
      @Override
      public String writeTrimmedTraceToString() {
          return t == null ? "" : SmartStackTraceParser.stackTraceWithFocusOnClassAsString(t, testClass);
      }
  
      @Override
      public SafeThrowable getThrowable() {
          return t == null ? null : new SafeThrowable(t);
      }
  
      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;
      }
  
      @Override
     public boolean equals(Object o) {
         if (this == o) {
             return true;
         }
         if (o == null || getClass() != o.getClass()) {
             return false;
         }
         DefaultStackTraceWriter that = (DefaultStackTraceWriter) o;
         return Objects.equals(t, that.t)
                 && Objects.equals(testClass, that.testClass)
                 && Objects.equals(testMethod, that.testMethod);
     }
 
     @Override
     public int hashCode() {
         return Objects.hash(t, testClass, testMethod);
     }
 }