/*
    * 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.plugin.surefire.report;
  
  import java.io.File;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.TreeMap;
  import java.util.concurrent.ConcurrentLinkedQueue;
  
  import org.apache.maven.plugin.surefire.StartupReportConfiguration;
  import org.apache.maven.plugin.surefire.log.api.ConsoleLogger;
  import org.apache.maven.plugin.surefire.log.api.Level;
  import org.apache.maven.plugin.surefire.runorder.StatisticsReporter;
  import org.apache.maven.surefire.api.report.ReporterFactory;
  import org.apache.maven.surefire.api.report.StackTraceWriter;
  import org.apache.maven.surefire.api.report.TestOutputReportEntry;
  import org.apache.maven.surefire.api.report.TestReportListener;
  import org.apache.maven.surefire.api.suite.RunResult;
  import org.apache.maven.surefire.extensions.ConsoleOutputReportEventListener;
  import org.apache.maven.surefire.extensions.StatelessReportEventListener;
  import org.apache.maven.surefire.extensions.StatelessTestsetInfoConsoleReportEventListener;
  import org.apache.maven.surefire.extensions.StatelessTestsetInfoFileReportEventListener;
  import org.apache.maven.surefire.report.RunStatistics;
  import org.apache.maven.surefire.shared.utils.logging.MessageBuilder;
  
  import static org.apache.maven.plugin.surefire.log.api.Level.resolveLevel;
  import static org.apache.maven.plugin.surefire.report.ConsoleReporter.PLAIN;
  import static org.apache.maven.plugin.surefire.report.DefaultReporterFactory.TestResultType.ERROR;
  import static org.apache.maven.plugin.surefire.report.DefaultReporterFactory.TestResultType.FAILURE;
  import static org.apache.maven.plugin.surefire.report.DefaultReporterFactory.TestResultType.FLAKE;
  import static org.apache.maven.plugin.surefire.report.DefaultReporterFactory.TestResultType.SKIPPED;
  import static org.apache.maven.plugin.surefire.report.DefaultReporterFactory.TestResultType.SUCCESS;
  import static org.apache.maven.plugin.surefire.report.DefaultReporterFactory.TestResultType.UNKNOWN;
  import static org.apache.maven.plugin.surefire.report.ReportEntryType.ERROR;
  import static org.apache.maven.plugin.surefire.report.ReportEntryType.FAILURE;
  import static org.apache.maven.plugin.surefire.report.ReportEntryType.SUCCESS;
  import static org.apache.maven.surefire.api.util.internal.ObjectUtils.useNonNull;
  import static org.apache.maven.surefire.shared.utils.logging.MessageUtils.buffer;
  
  /**
   * Provides reporting modules on the plugin side.
   * <br>
   * Keeps a centralized count of test run results.
   *
   * @author Kristian Rosenvold
   */
  public class DefaultReporterFactory implements ReporterFactory, ReportsMerger {
      private final Collection<TestSetRunListener> listeners = new ConcurrentLinkedQueue<>();
      private final StartupReportConfiguration reportConfiguration;
      private final ConsoleLogger consoleLogger;
      private final Integer forkNumber;
  
      private RunStatistics globalStats = new RunStatistics();
  
      // from "<testclass>.<testmethod>" -> statistics about all the runs for flaky tests
      private Map<String, List<TestMethodStats>> flakyTests;
  
      // from "<testclass>.<testmethod>" -> statistics about all the runs for failed tests
      private Map<String, List<TestMethodStats>> failedTests;
  
      // from "<testclass>.<testmethod>" -> statistics about all the runs for error tests
      private Map<String, List<TestMethodStats>> errorTests;
  
      public DefaultReporterFactory(StartupReportConfiguration reportConfiguration, ConsoleLogger consoleLogger) {
          this(reportConfiguration, consoleLogger, null);
      }
  
      public DefaultReporterFactory(
              StartupReportConfiguration reportConfiguration, ConsoleLogger consoleLogger, Integer forkNumber) {
          this.reportConfiguration = reportConfiguration;
          this.consoleLogger = consoleLogger;
          this.forkNumber = forkNumber;
      }
  
      @Override
      public TestReportListener<TestOutputReportEntry> createTestReportListener() {
          TestSetRunListener testSetRunListener = new TestSetRunListener(
                  createConsoleReporter(),
                  createFileReporter(),
                 createSimpleXMLReporter(),
                 createConsoleOutputReceiver(),
                 createStatisticsReporter(),
                 reportConfiguration.isTrimStackTrace(),
                 PLAIN.equals(reportConfiguration.getReportFormat()),
                 reportConfiguration.isBriefOrPlainFormat(),
                 consoleLogger);
         addListener(testSetRunListener);
         return testSetRunListener;
     }
 
     @Override
     public File getReportsDirectory() {
         return reportConfiguration.getReportsDirectory();
     }
 
     private StatelessTestsetInfoConsoleReportEventListener<WrappedReportEntry, TestSetStats> createConsoleReporter() {
         StatelessTestsetInfoConsoleReportEventListener<WrappedReportEntry, TestSetStats> consoleReporter =
                 reportConfiguration.instantiateConsoleReporter(consoleLogger);
         return useNonNull(consoleReporter, NullConsoleReporter.INSTANCE);
     }
 
     private StatelessTestsetInfoFileReportEventListener<WrappedReportEntry, TestSetStats> createFileReporter() {
         StatelessTestsetInfoFileReportEventListener<WrappedReportEntry, TestSetStats> fileReporter =
                 reportConfiguration.instantiateFileReporter(forkNumber);
         return useNonNull(fileReporter, NullFileReporter.INSTANCE);
     }
 
     private StatelessReportEventListener<WrappedReportEntry, TestSetStats> createSimpleXMLReporter() {
         StatelessReportEventListener<WrappedReportEntry, TestSetStats> xmlReporter =
                 reportConfiguration.instantiateStatelessXmlReporter(forkNumber);
         return useNonNull(xmlReporter, NullStatelessXmlReporter.INSTANCE);
     }
 
     private ConsoleOutputReportEventListener createConsoleOutputReceiver() {
         ConsoleOutputReportEventListener outputReporter =
                 reportConfiguration.instantiateConsoleOutputFileReporter(forkNumber);
         return useNonNull(outputReporter, NullConsoleOutputReceiver.INSTANCE);
     }
 
     private StatisticsReporter createStatisticsReporter() {
         StatisticsReporter statisticsReporter = reportConfiguration.getStatisticsReporter();
         return useNonNull(statisticsReporter, NullStatisticsReporter.INSTANCE);
     }
 
     @Override
     public void mergeFromOtherFactories(Collection<DefaultReporterFactory> factories) {
         for (DefaultReporterFactory factory : factories) {
             listeners.addAll(factory.listeners);
         }
     }
 
     final void addListener(TestSetRunListener listener) {
         listeners.add(listener);
     }
 
     @Override
     public RunResult close() {
         mergeTestHistoryResult();
         runCompleted();
         for (TestSetRunListener listener : listeners) {
             listener.close();
         }
         return globalStats.getRunResult();
     }
 
     @Override
     public void runStarting() {
         if (reportConfiguration.isPrintSummary()) {
             log("");
             log("-------------------------------------------------------");
             log(" T E S T S");
             log("-------------------------------------------------------");
         }
     }
 
     private void runCompleted() {
         if (reportConfiguration.isPrintSummary()) {
             log("");
             log("Results:");
             log("");
         }
         boolean printedFailures = printTestFailures(TestResultType.FAILURE);
         boolean printedErrors = printTestFailures(TestResultType.ERROR);
         boolean printedFlakes = printTestFailures(TestResultType.FLAKE);
         if (reportConfiguration.isPrintSummary()) {
             if (printedFailures | printedErrors | printedFlakes) {
                 log("");
             }
             boolean hasSuccessful = globalStats.getCompletedCount() > 0;
             boolean hasSkipped = globalStats.getSkipped() > 0;
             log(globalStats.getSummary(), hasSuccessful, printedFailures, printedErrors, hasSkipped, printedFlakes);
             log("");
         }
     }
 
     public RunStatistics getGlobalRunStatistics() {
         mergeTestHistoryResult();
         return globalStats;
     }
 
     /**
      * Get the result of a test based on all its runs. If it has success and failures/errors, then it is a flake;
      * if it only has errors or failures, then count its result based on its first run
      *
      * @param reportEntries the list of test run report type for a given test
      * @param rerunFailingTestsCount configured rerun count for failing tests
      * @return the type of test result
      */
     // Use default visibility for testing
     static TestResultType getTestResultType(List<ReportEntryType> reportEntries, int rerunFailingTestsCount) {
         if (reportEntries == null || reportEntries.isEmpty()) {
             return UNKNOWN;
         }
 
         boolean seenSuccess = false, seenFailure = false, seenError = false;
         for (ReportEntryType resultType : reportEntries) {
             if (resultType == ReportEntryType.SUCCESS) {
                 seenSuccess = true;
             } else if (resultType == ReportEntryType.FAILURE) {
                 seenFailure = true;
             } else if (resultType == ReportEntryType.ERROR) {
                 seenError = true;
             }
         }
 
         if (seenFailure || seenError) {
             if (seenSuccess && rerunFailingTestsCount > 0) {
                 return TestResultType.FLAKE;
             } else {
                 return seenError ? TestResultType.ERROR : TestResultType.FAILURE;
             }
         } else if (seenSuccess) {
             return TestResultType.SUCCESS;
         } else {
             return SKIPPED;
         }
     }
 
     /**
      * Merge all the TestMethodStats in each TestRunListeners and put results into flakyTests, failedTests and
      * errorTests, indexed by test class and method name. Update globalStatistics based on the result of the merge.
      */
     private void mergeTestHistoryResult() {
         globalStats = new RunStatistics();
         flakyTests = new TreeMap<>();
         failedTests = new TreeMap<>();
         errorTests = new TreeMap<>();
 
         Map<String, List<TestMethodStats>> mergedTestHistoryResult = new HashMap<>();
         // Merge all the stats for tests from listeners
         for (TestSetRunListener listener : listeners) {
             for (TestMethodStats methodStats : listener.getTestMethodStats()) {
                 List<TestMethodStats> currentMethodStats =
                         mergedTestHistoryResult.get(methodStats.getTestClassMethodName());
                 if (currentMethodStats == null) {
                     currentMethodStats = new ArrayList<>();
                     currentMethodStats.add(methodStats);
                     mergedTestHistoryResult.put(methodStats.getTestClassMethodName(), currentMethodStats);
                 } else {
                     currentMethodStats.add(methodStats);
                 }
             }
         }
 
         // Update globalStatistics by iterating through mergedTestHistoryResult
         int completedCount = 0, skipped = 0;
 
         for (Map.Entry<String, List<TestMethodStats>> entry : mergedTestHistoryResult.entrySet()) {
             List<TestMethodStats> testMethodStats = entry.getValue();
             String testClassMethodName = entry.getKey();
             completedCount++;
 
             List<ReportEntryType> resultTypes = new ArrayList<>();
             for (TestMethodStats methodStats : testMethodStats) {
                 resultTypes.add(methodStats.getResultType());
             }
 
             switch (getTestResultType(resultTypes, reportConfiguration.getRerunFailingTestsCount())) {
                 case SUCCESS:
                     // If there are multiple successful runs of the same test, count all of them
                     int successCount = 0;
                     for (ReportEntryType type : resultTypes) {
                         if (type == ReportEntryType.SUCCESS) {
                             successCount++;
                         }
                     }
                     completedCount += successCount - 1;
                     break;
                 case SKIPPED:
                     skipped++;
                     break;
                 case FLAKE:
                     flakyTests.put(testClassMethodName, testMethodStats);
                     break;
                 case FAILURE:
                     failedTests.put(testClassMethodName, testMethodStats);
                     break;
                 case ERROR:
                     errorTests.put(testClassMethodName, testMethodStats);
                     break;
                 default:
                     throw new IllegalStateException("Get unknown test result type");
             }
         }
 
         globalStats.set(completedCount, errorTests.size(), failedTests.size(), skipped, flakyTests.size());
     }
 
     /**
      * Print failed tests and flaked tests. A test is considered as a failed test if it failed/got an error with
      * all the runs. If a test passes in ever of the reruns, it will be count as a flaked test
      *
      * @param type   the type of results to be printed, could be error, failure or flake
      * @return {@code true} if printed some lines
      */
     // Use default visibility for testing
     boolean printTestFailures(TestResultType type) {
         final Map<String, List<TestMethodStats>> testStats;
         final Level level;
         switch (type) {
             case FAILURE:
                 testStats = failedTests;
                 level = Level.FAILURE;
                 break;
             case ERROR:
                 testStats = errorTests;
                 level = Level.FAILURE;
                 break;
             case FLAKE:
                 testStats = flakyTests;
                 level = Level.UNSTABLE;
                 break;
             default:
                 return false;
         }
 
         boolean printed = false;
         if (!testStats.isEmpty()) {
             log(type.getLogPrefix(), level);
             printed = true;
         }
 
         for (Map.Entry<String, List<TestMethodStats>> entry : testStats.entrySet()) {
             List<TestMethodStats> testMethodStats = entry.getValue();
             if (testMethodStats.size() == 1) {
                 // No rerun, follow the original output format
                 failure("  " + testMethodStats.get(0).getStackTraceWriter().smartTrimmedStackTrace());
             } else {
                 log(entry.getKey(), level);
                 for (int i = 0; i < testMethodStats.size(); i++) {
                     StackTraceWriter failureStackTrace = testMethodStats.get(i).getStackTraceWriter();
                     if (failureStackTrace == null) {
                         success("  Run " + (i + 1) + ": PASS");
                     } else {
                         failure("  Run " + (i + 1) + ": " + failureStackTrace.smartTrimmedStackTrace());
                     }
                 }
                 log("");
             }
         }
         return printed;
     }
 
     // Describe the result of a given test
     enum TestResultType {
         ERROR("Errors: "),
         FAILURE("Failures: "),
         FLAKE("Flakes: "),
         SUCCESS("Success: "),
         SKIPPED("Skipped: "),
         UNKNOWN("Unknown: ");
 
         private final String logPrefix;
 
         TestResultType(String logPrefix) {
             this.logPrefix = logPrefix;
         }
 
         public String getLogPrefix() {
             return logPrefix;
         }
     }
 
     private void log(String s, boolean success, boolean failures, boolean errors, boolean skipped, boolean flakes) {
         Level level = resolveLevel(success, failures, errors, skipped, flakes);
         log(s, level);
     }
 
     private void log(String s, Level level) {
         switch (level) {
             case FAILURE:
                 failure(s);
                 break;
             case UNSTABLE:
                 warning(s);
                 break;
             case SUCCESS:
                 success(s);
                 break;
             default:
                 info(s);
         }
     }
 
     private void log(String s) {
         consoleLogger.info(s);
     }
 
     private void info(String s) {
         MessageBuilder builder = buffer();
         consoleLogger.info(builder.a(s).toString());
     }
 
     private void warning(String s) {
         MessageBuilder builder = buffer();
         consoleLogger.warning(builder.warning(s).toString());
     }
 
     private void success(String s) {
         MessageBuilder builder = buffer();
         consoleLogger.info(builder.success(s).toString());
     }
 
     private void failure(String s) {
         MessageBuilder builder = buffer();
         consoleLogger.error(builder.failure(s).toString());
     }
 }