using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;

namespace Lucene.Net.Util
{

//JAVA TO C# CONVERTER TODO TASK: this Java 'import static' statement cannot be converted to .NET:
	//import static Lucene.Net.Util.LuceneTestCase.*;


	/*using Description = org.junit.runner.Description;
	using Result = org.junit.runner.Result;
	using Failure = org.junit.runner.notification.Failure;
	using RunListener = org.junit.runner.notification.RunListener;

	using LifecycleScope = com.carrotsearch.randomizedtesting.LifecycleScope;
	using RandomizedContext = com.carrotsearch.randomizedtesting.RandomizedContext;*/

	/*
	 * 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.
	 */

	/// <summary>
	/// A suite listener printing a "reproduce string". this ensures test result
	/// events are always captured properly even if exceptions happen at
	/// initialization or suite/ hooks level.
	/// </summary>
	public sealed class RunListenerPrintReproduceInfo : RunListener
	{
	  /// <summary>
	  /// A list of all test suite classes executed so far in this JVM (ehm, 
	  /// under this class's classloader).
	  /// </summary>
	  private static IList<string> TestClassesRun = new List<string>();

	  /// <summary>
	  /// The currently executing scope.
	  /// </summary>
	  private LifecycleScope Scope;

	  /// <summary>
	  /// Current test failed. </summary>
	  private bool TestFailed;

	  /// <summary>
	  /// Suite-level code (initialization, rule, hook) failed. </summary>
	  private bool SuiteFailed;

	  /// <summary>
	  /// A marker to print full env. diagnostics after the suite. </summary>
	  private bool PrintDiagnosticsAfterClass;


	  public override void TestRunStarted(Description description)
	  {
		SuiteFailed = false;
		TestFailed = false;
		Scope = LifecycleScope.SUITE;

		Type targetClass = RandomizedContext.current().TargetClass;
		TestClassesRun.Add(targetClass.Name);
	  }

	  public override void TestStarted(Description description)
	  {
		this.TestFailed = false;
		this.Scope = LifecycleScope.TEST;
	  }

	  public override void TestFailure(Failure failure)
	  {
		if (Scope == LifecycleScope.TEST)
		{
		  TestFailed = true;
		}
		else
		{
		  SuiteFailed = true;
		}
		PrintDiagnosticsAfterClass = true;
	  }

	  public override void TestFinished(Description description)
	  {
		if (TestFailed)
		{
		  ReportAdditionalFailureInfo(StripTestNameAugmentations(description.MethodName));
		}
		Scope = LifecycleScope.SUITE;
		TestFailed = false;
	  }

	  /// <summary>
	  /// The <seealso cref="Description"/> object in JUnit does not expose the actual test method,
	  /// instead it has the concept of a unique "name" of a test. To run the same method (tests)
	  /// repeatedly, randomizedtesting must make those "names" unique: it appends the current iteration
	  /// and seeds to the test method's name. We strip this information here.   
	  /// </summary>
	  private string StripTestNameAugmentations(string methodName)
	  {
		if (methodName != null)
		{
		  methodName = methodName.replaceAll("\\s*\\{.+?\\}", "");
		}
		return methodName;
	  }

	  public override void TestRunFinished(Result result)
	  {
		if (PrintDiagnosticsAfterClass || LuceneTestCase.VERBOSE)
		{
		  RunListenerPrintReproduceInfo.PrintDebuggingInformation();
		}

		if (SuiteFailed)
		{
		  ReportAdditionalFailureInfo(null);
		}
	  }

	  /// <summary>
	  /// print some useful debugging information about the environment </summary>
	  private static void PrintDebuggingInformation()
	  {
		if (classEnvRule != null)
		{
		  Console.Error.WriteLine("NOTE: test params are: codec=" + classEnvRule.codec + ", sim=" + classEnvRule.similarity + ", locale=" + classEnvRule.locale + ", timezone=" + (classEnvRule.timeZone == null ? "(null)" : classEnvRule.timeZone.ID));
		}
		Console.Error.WriteLine("NOTE: " + System.getProperty("os.name") + " " + System.getProperty("os.version") + " " + System.getProperty("os.arch") + "/" + System.getProperty("java.vendor") + " " + System.getProperty("java.version") + " " + (Constants.JRE_IS_64BIT ? "(64-bit)" : "(32-bit)") + "/" + "cpus=" + Runtime.Runtime.availableProcessors() + "," + "threads=" + Thread.activeCount() + "," + "free=" + Runtime.Runtime.freeMemory() + "," + "total=" + Runtime.Runtime.totalMemory());
		Console.Error.WriteLine("NOTE: All tests run in this JVM: " + Arrays.ToString(TestClassesRun.ToArray()));
	  }

	  private void ReportAdditionalFailureInfo(string testName)
	  {
		if (TEST_LINE_DOCS_FILE.EndsWith(JENKINS_LARGE_LINE_DOCS_FILE))
		{
		  Console.Error.WriteLine("NOTE: download the large Jenkins line-docs file by running " + "'ant get-jenkins-line-docs' in the lucene directory.");
		}

		StringBuilder b = new StringBuilder();
		b.Append("NOTE: reproduce with: ant test ");

		// Test case, method, seed.
		AddVmOpt(b, "testcase", RandomizedContext.current().TargetClass.SimpleName);
		AddVmOpt(b, "tests.method", testName);
		AddVmOpt(b, "tests.seed", RandomizedContext.current().RunnerSeedAsString);

		// Test groups and multipliers.
		if (RANDOM_MULTIPLIER > 1)
		{
			AddVmOpt(b, "tests.multiplier", RANDOM_MULTIPLIER);
		}
		if (TEST_NIGHTLY)
		{
			AddVmOpt(b, SYSPROP_NIGHTLY, TEST_NIGHTLY);
		}
		if (TEST_WEEKLY)
		{
			AddVmOpt(b, SYSPROP_WEEKLY, TEST_WEEKLY);
		}
		if (TEST_SLOW)
		{
			AddVmOpt(b, SYSPROP_SLOW, TEST_SLOW);
		}
		if (TEST_AWAITSFIX)
		{
			AddVmOpt(b, SYSPROP_AWAITSFIX, TEST_AWAITSFIX);
		}

		// Codec, postings, directories.
		if (!TEST_CODEC.Equals("random"))
		{
			AddVmOpt(b, "tests.codec", TEST_CODEC);
		}
		if (!TEST_POSTINGSFORMAT.Equals("random"))
		{
			AddVmOpt(b, "tests.postingsformat", TEST_POSTINGSFORMAT);
		}
		if (!TEST_DOCVALUESFORMAT.Equals("random"))
		{
			AddVmOpt(b, "tests.docvaluesformat", TEST_DOCVALUESFORMAT);
		}
		if (!TEST_DIRECTORY.Equals("random"))
		{
			AddVmOpt(b, "tests.directory", TEST_DIRECTORY);
		}

		// Environment.
		if (!TEST_LINE_DOCS_FILE.Equals(DEFAULT_LINE_DOCS_FILE))
		{
			AddVmOpt(b, "tests.linedocsfile", TEST_LINE_DOCS_FILE);
		}
		if (classEnvRule != null)
		{
		  AddVmOpt(b, "tests.locale", classEnvRule.locale);
		  if (classEnvRule.timeZone != null)
		  {
			AddVmOpt(b, "tests.timezone", classEnvRule.timeZone.ID);
		  }
		}

		AddVmOpt(b, "tests.file.encoding", System.getProperty("file.encoding"));

		Console.Error.WriteLine(b.ToString());
	  }

	  /// <summary>
	  /// Append a VM option (-Dkey=value) to a <seealso cref="StringBuilder"/>. Add quotes if 
	  /// spaces or other funky characters are detected.
	  /// </summary>
	  internal static void AddVmOpt(StringBuilder b, string key, object value)
	  {
		if (value == null)
		{
			return;
		}

		b.Append(" -D").Append(key).Append("=");
		string v = value.ToString();
		// Add simplistic quoting. this varies a lot from system to system and between
		// shells... ANT should have some code for doing it properly.
		if (Pattern.compile("[\\s=']").matcher(v).find())
		{
		  v = '"' + v + '"';
		}
		b.Append(v);
	  }
	}

}