package org.apache.maven.plugin.surefire.booterclient.output;
   
   /*
    * 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.
   */
  
  import org.apache.maven.plugin.surefire.booterclient.lazytestprovider.NotifiableTestStream;
  import org.apache.maven.plugin.surefire.log.api.ConsoleLogger;
  import org.apache.maven.plugin.surefire.report.DefaultReporterFactory;
  import org.apache.maven.surefire.api.event.Event;
  import org.apache.maven.surefire.extensions.EventHandler;
  import org.apache.maven.surefire.api.booter.MasterProcessChannelEncoder;
  import org.apache.maven.surefire.api.report.ConsoleOutputReceiver;
  import org.apache.maven.surefire.api.report.ReportEntry;
  import org.apache.maven.surefire.api.report.RunListener;
  import org.apache.maven.surefire.api.report.RunMode;
  import org.apache.maven.surefire.api.report.StackTraceWriter;
  import org.apache.maven.surefire.api.report.TestSetReportEntry;
  
  import javax.annotation.Nonnull;
  import java.io.File;
  import java.util.Map;
  import java.util.Queue;
  import java.util.Set;
  import java.util.TreeSet;
  import java.util.concurrent.ConcurrentHashMap;
  import java.util.concurrent.ConcurrentLinkedQueue;
  import java.util.concurrent.atomic.AtomicLong;
  
  import static java.lang.System.currentTimeMillis;
  import static java.util.Collections.unmodifiableMap;
  import static org.apache.maven.surefire.api.booter.Shutdown.KILL;
  import static org.apache.maven.surefire.api.report.CategorizedReportEntry.reportEntry;
  
  // todo move to the same package with ForkStarter
  
  /**
   * Knows how to reconstruct *all* the state transmitted over stdout by the forked process.
   *
   * @author Kristian Rosenvold
   */
  public class ForkClient
      implements EventHandler<Event>
  {
      private static final long START_TIME_ZERO = 0L;
      private static final long START_TIME_NEGATIVE_TIMEOUT = -1L;
  
      private final DefaultReporterFactory defaultReporterFactory;
  
      private final Map<String, String> testVmSystemProperties = new ConcurrentHashMap<>();
  
      private final NotifiableTestStream notifiableTestStream;
  
      private final Queue<String> testsInProgress = new ConcurrentLinkedQueue<>();
  
      /**
       * <em>testSetStartedAt</em> is set to non-zero after received
       * {@link MasterProcessChannelEncoder#testSetStarting(ReportEntry, boolean)}.
       */
      private final AtomicLong testSetStartedAt = new AtomicLong( START_TIME_ZERO );
  
      private final ForkedProcessEventNotifier notifier = new ForkedProcessEventNotifier();
  
      private final int forkNumber;
  
      private RunListener testSetReporter;
  
      /**
       * Written by one Thread and read by another: Main Thread and ForkStarter's Thread.
       */
      private volatile boolean saidGoodBye;
  
      private volatile StackTraceWriter errorInFork;
  
      public ForkClient( DefaultReporterFactory defaultReporterFactory, NotifiableTestStream notifiableTestStream,
                         int forkNumber )
      {
          this.defaultReporterFactory = defaultReporterFactory;
          this.notifiableTestStream = notifiableTestStream;
          this.forkNumber = forkNumber;
          notifier.setTestSetStartingListener( new TestSetStartingListener() );
          notifier.setTestSetCompletedListener( new TestSetCompletedListener() );
          notifier.setTestStartingListener( new TestStartingListener() );
          notifier.setTestSucceededListener( new TestSucceededListener() );
         notifier.setTestFailedListener( new TestFailedListener() );
         notifier.setTestSkippedListener( new TestSkippedListener() );
         notifier.setTestErrorListener( new TestErrorListener() );
         notifier.setTestAssumptionFailureListener( new TestAssumptionFailureListener() );
         notifier.setSystemPropertiesListener( new SystemPropertiesListener() );
         notifier.setStdOutListener( new StdOutListener() );
         notifier.setStdErrListener( new StdErrListener() );
         notifier.setConsoleInfoListener( new ConsoleListener() );
         notifier.setAcquireNextTestListener( new AcquireNextTestListener() );
         notifier.setConsoleErrorListener( new ErrorListener() );
         notifier.setByeListener( new ByeListener() );
         notifier.setStopOnNextTestListener( new StopOnNextTestListener() );
         notifier.setConsoleDebugListener( new DebugListener() );
         notifier.setConsoleWarningListener( new WarningListener() );
         notifier.setExitErrorEventListener( new ExitErrorEventListener() );
     }
 
     private final class TestSetStartingListener
             implements ForkedProcessReportEventListener<TestSetReportEntry>
     {
         @Override
         public void handle( RunMode runMode, TestSetReportEntry reportEntry )
         {
             getTestSetReporter().testSetStarting( reportEntry );
             setCurrentStartTime();
         }
     }
 
     private final class TestSetCompletedListener
             implements ForkedProcessReportEventListener<TestSetReportEntry>
     {
         @Override
         public void handle( RunMode runMode, TestSetReportEntry reportEntry )
         {
             testsInProgress.clear();
             TestSetReportEntry entry = reportEntry( reportEntry.getSourceName(), reportEntry.getSourceText(),
                     reportEntry.getName(), reportEntry.getNameText(),
                     reportEntry.getGroup(), reportEntry.getStackTraceWriter(), reportEntry.getElapsed(),
                     reportEntry.getMessage(), getTestVmSystemProperties() );
             getTestSetReporter().testSetCompleted( entry );
         }
     }
 
     private final class TestStartingListener implements ForkedProcessReportEventListener<ReportEntry>
     {
         @Override
         public void handle( RunMode runMode, ReportEntry reportEntry )
         {
             testsInProgress.offer( reportEntry.getSourceName() );
             getTestSetReporter().testStarting( reportEntry );
         }
     }
 
     private final class TestSucceededListener implements ForkedProcessReportEventListener<ReportEntry>
     {
         @Override
         public void handle( RunMode runMode, ReportEntry reportEntry )
         {
             testsInProgress.remove( reportEntry.getSourceName() );
             getTestSetReporter().testSucceeded( reportEntry );
         }
     }
 
     private final class TestFailedListener implements ForkedProcessReportEventListener<ReportEntry>
     {
         @Override
         public void handle( RunMode runMode, ReportEntry reportEntry )
         {
             testsInProgress.remove( reportEntry.getSourceName() );
             getTestSetReporter().testFailed( reportEntry );
         }
     }
 
     private final class TestSkippedListener implements ForkedProcessReportEventListener<ReportEntry>
     {
         @Override
         public void handle( RunMode runMode, ReportEntry reportEntry )
         {
             testsInProgress.remove( reportEntry.getSourceName() );
             getTestSetReporter().testSkipped( reportEntry );
         }
     }
 
     private final class TestErrorListener implements ForkedProcessReportEventListener<ReportEntry>
     {
         @Override
         public void handle( RunMode runMode, ReportEntry reportEntry )
         {
             testsInProgress.remove( reportEntry.getSourceName() );
             getTestSetReporter().testError( reportEntry );
         }
     }
 
     private final class TestAssumptionFailureListener implements ForkedProcessReportEventListener<ReportEntry>
     {
         @Override
         public void handle( RunMode runMode, ReportEntry reportEntry )
         {
             testsInProgress.remove( reportEntry.getSourceName() );
             getTestSetReporter().testAssumptionFailure( reportEntry );
         }
     }
 
     private final class SystemPropertiesListener implements ForkedProcessPropertyEventListener
     {
         @Override
         public void handle( RunMode runMode, String key, String value )
         {
             testVmSystemProperties.put( key, value );
         }
     }
 
     private final class StdOutListener implements ForkedProcessStandardOutErrEventListener
     {
         @Override
         public void handle( RunMode runMode, String output, boolean newLine )
         {
             writeTestOutput( output, newLine, true );
         }
     }
 
     private final class StdErrListener implements ForkedProcessStandardOutErrEventListener
     {
         @Override
         public void handle( RunMode runMode, String output, boolean newLine )
         {
             writeTestOutput( output, newLine, false );
         }
     }
 
     private final class ConsoleListener implements ForkedProcessStringEventListener
     {
         @Override
         public void handle( String msg )
         {
             getOrCreateConsoleLogger()
                     .info( msg );
         }
     }
 
     private final class AcquireNextTestListener implements ForkedProcessEventListener
     {
         @Override
         public void handle()
         {
             notifiableTestStream.provideNewTest();
         }
     }
 
     private class ErrorListener implements ForkedProcessStackTraceEventListener
     {
         @Override
         public void handle( @Nonnull StackTraceWriter stackTrace )
         {
             String msg = stackTrace.getThrowable().getMessage();
             if ( errorInFork == null )
             {
                 errorInFork = stackTrace.writeTraceToString() != null ? stackTrace : null;
                 if ( msg != null )
                 {
                     getOrCreateConsoleLogger()
                             .error( msg );
                 }
             }
             dumpToLoFile( msg );
         }
     }
 
     private final class ByeListener implements ForkedProcessEventListener
     {
         @Override
         public void handle()
         {
             saidGoodBye = true;
             notifiableTestStream.acknowledgeByeEventReceived();
         }
     }
 
     private final class StopOnNextTestListener implements ForkedProcessEventListener
     {
         @Override
         public void handle()
         {
             stopOnNextTest();
         }
     }
 
     private final class DebugListener implements ForkedProcessStringEventListener
     {
         @Override
         public void handle( String msg )
         {
             getOrCreateConsoleLogger()
                     .debug( msg );
         }
     }
 
     private final class WarningListener implements ForkedProcessStringEventListener
     {
         @Override
         public void handle( String msg )
         {
             getOrCreateConsoleLogger()
                     .warning( msg );
         }
     }
 
     private final class ExitErrorEventListener implements ForkedProcessExitErrorListener
     {
         @Override
         public void handle( StackTraceWriter stackTrace )
         {
             getOrCreateConsoleLogger()
                 .error( "System Exit has timed out in the forked process " + forkNumber );
         }
     }
 
     /**
      * Overridden by a subclass, see {@link org.apache.maven.plugin.surefire.booterclient.ForkStarter}.
      */
     protected void stopOnNextTest()
     {
     }
 
     public void kill()
     {
         if ( !saidGoodBye )
         {
             notifiableTestStream.shutdown( KILL );
         }
     }
 
     /**
      * Called in concurrent Thread.
      * Will shutdown if timeout was reached.
      *
      * @param currentTimeMillis    current time in millis seconds
      * @param forkedProcessTimeoutInSeconds timeout in seconds given by MOJO
      */
     public final void tryToTimeout( long currentTimeMillis, int forkedProcessTimeoutInSeconds )
     {
         if ( forkedProcessTimeoutInSeconds > 0 )
         {
             final long forkedProcessTimeoutInMillis = 1000 * forkedProcessTimeoutInSeconds;
             final long startedAt = testSetStartedAt.get();
             if ( startedAt > START_TIME_ZERO && currentTimeMillis - startedAt >= forkedProcessTimeoutInMillis )
             {
                 testSetStartedAt.set( START_TIME_NEGATIVE_TIMEOUT );
                 notifiableTestStream.shutdown( KILL );
             }
         }
     }
 
     public final DefaultReporterFactory getDefaultReporterFactory()
     {
         return defaultReporterFactory;
     }
 
     @Override
     public final void handleEvent( @Nonnull Event event )
     {
         notifier.notifyEvent( event );
     }
 
     private void setCurrentStartTime()
     {
         if ( testSetStartedAt.get() == START_TIME_ZERO ) // JIT can optimize <= no JNI call
         {
             // Not necessary to call JNI library library #currentTimeMillis
             // which may waste 10 - 30 machine cycles in callback. Callbacks should be fast.
             testSetStartedAt.compareAndSet( START_TIME_ZERO, currentTimeMillis() );
         }
     }
 
     public final boolean hadTimeout()
     {
         return testSetStartedAt.get() == START_TIME_NEGATIVE_TIMEOUT;
     }
 
     private RunListener getTestSetReporter()
     {
         if ( testSetReporter == null )
         {
             testSetReporter = defaultReporterFactory.createReporter();
         }
         return testSetReporter;
     }
 
     void dumpToLoFile( String msg )
     {
         File reportsDir = defaultReporterFactory.getReportsDirectory();
         InPluginProcessDumpSingleton util = InPluginProcessDumpSingleton.getSingleton();
         util.dumpStreamText( msg, reportsDir, forkNumber );
     }
 
     private void writeTestOutput( String output, boolean newLine, boolean isStdout )
     {
         getOrCreateConsoleOutputReceiver()
                 .writeTestOutput( output, newLine, isStdout );
     }
 
     public final Map<String, String> getTestVmSystemProperties()
     {
         return unmodifiableMap( testVmSystemProperties );
     }
 
     /**
      * Used when getting reporters on the plugin side of a fork.
      * Used by testing purposes only. May not be volatile variable.
      *
      * @return A mock provider reporter
      */
     public final RunListener getReporter()
     {
         return getTestSetReporter();
     }
 
     private ConsoleOutputReceiver getOrCreateConsoleOutputReceiver()
     {
         return (ConsoleOutputReceiver) getTestSetReporter();
     }
 
     private ConsoleLogger getOrCreateConsoleLogger()
     {
         return (ConsoleLogger) getTestSetReporter();
     }
 
     public void close( boolean hadTimeout )
     {
         // no op
     }
 
     public final boolean isSaidGoodBye()
     {
         return saidGoodBye;
     }
 
     public final StackTraceWriter getErrorInFork()
     {
         return errorInFork;
     }
 
     public final boolean isErrorInFork()
     {
         return errorInFork != null;
     }
 
     public Set<String> testsInProgress()
     {
         return new TreeSet<>( testsInProgress );
     }
 
     public boolean hasTestsInProgress()
     {
         return !testsInProgress.isEmpty();
     }
 }