// Copyright 2000-2021 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
package org.jetbrains.java.decompiler;

import org.jetbrains.java.decompiler.main.decompiler.ConsoleDecompiler;
import org.jetbrains.java.decompiler.main.extern.IFernflowerPreferences;
import org.junit.After;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.Timeout;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import static org.jetbrains.java.decompiler.DecompilerTestFixture.assertFilesEqual;
import static org.junit.Assert.assertTrue;

public class SingleClassesTest {
  private DecompilerTestFixture fixture;

  /*
   * Set individual test duration time limit to 60 seconds.
   * This will help us to test bugs hanging decompiler.
   */
  @Rule
  public Timeout globalTimeout = Timeout.seconds(60);

  @Before
  public void setUp() throws IOException {
    fixture = new DecompilerTestFixture();
    fixture.setUp(IFernflowerPreferences.BYTECODE_SOURCE_MAPPING, "1",
                  IFernflowerPreferences.DUMP_ORIGINAL_LINES, "1",
                  IFernflowerPreferences.IGNORE_INVALID_BYTECODE, "1",
                  IFernflowerPreferences.VERIFY_ANONYMOUS_CLASSES, "1");
  }

  @After
  public void tearDown() {
    fixture.tearDown();
    fixture = null;
  }

  @Test public void testPrimitiveNarrowing() { doTest("pkg/TestPrimitiveNarrowing"); }
  @Test public void testClassFields() { doTest("pkg/TestClassFields"); }
  @Test public void testInterfaceFields() { doTest("pkg/TestInterfaceFields"); }
  @Test public void testClassLambda() { doTest("pkg/TestClassLambda"); }
  @Test public void testClassLoop() { doTest("pkg/TestClassLoop"); }
  @Test public void testClassSwitch() { doTest("pkg/TestClassSwitch"); }
  @Test public void testClassTypes() { doTest("pkg/TestClassTypes"); }
  @Test public void testClassVar() { doTest("pkg/TestClassVar"); }
  @Test public void testClassNestedInitializer() { doTest("pkg/TestClassNestedInitializer"); }
  @Test public void testClassCast() { doTest("pkg/TestClassCast"); }
  @Test public void testDeprecations() { doTest("pkg/TestDeprecations"); }
  @Test public void testExtendsList() { doTest("pkg/TestExtendsList"); }
  @Test public void testMethodParameters() { doTest("pkg/TestMethodParameters"); }
  @Test public void testMethodParametersAttr() { doTest("pkg/TestMethodParametersAttr"); }
  @Test public void testCodeConstructs() { doTest("pkg/TestCodeConstructs"); }
  @Test public void testConstants() { doTest("pkg/TestConstants"); }
  @Test public void testEnum() { doTest("pkg/TestEnum"); }
  @Test public void testDebugSymbols() { doTest("pkg/TestDebugSymbols"); }
  @Test public void testInvalidMethodSignature() { doTest("InvalidMethodSignature"); }
  @Test public void testAnonymousClassConstructor() { doTest("pkg/TestAnonymousClassConstructor"); }
  @Test public void testInnerClassConstructor() { doTest("pkg/TestInnerClassConstructor"); }
  @Test public void testInnerClassConstructor11() { doTest("v11/TestInnerClassConstructor"); }
  @Test public void testTryCatchFinally() { doTest("pkg/TestTryCatchFinally"); }
  @Test public void testAmbiguousCall() { doTest("pkg/TestAmbiguousCall"); }
  @Test public void testAmbiguousCallWithDebugInfo() { doTest("pkg/TestAmbiguousCallWithDebugInfo"); }
  @Test public void testSimpleBytecodeMapping() { doTest("pkg/TestClassSimpleBytecodeMapping"); }
  @Test public void testSynchronizedMapping() { doTest("pkg/TestSynchronizedMapping"); }
  @Test public void testAbstractMethods() { doTest("pkg/TestAbstractMethods"); }
  @Test public void testLocalClass() { doTest("pkg/TestLocalClass"); }
  @Test public void testAnonymousClass() { doTest("pkg/TestAnonymousClass"); }
  @Test public void testThrowException() { doTest("pkg/TestThrowException"); }
  @Test public void testInnerLocal() { doTest("pkg/TestInnerLocal"); }
  @Test public void testInnerSignature() { doTest("pkg/TestInnerSignature"); }
  @Test public void testAnonymousSignature() { doTest("pkg/TestAnonymousSignature"); }
  @Test public void testLocalsSignature() { doTest("pkg/TestLocalsSignature"); }
  @Test public void testParameterizedTypes() { doTest("pkg/TestParameterizedTypes"); }
  @Test public void testShadowing() { doTest("pkg/TestShadowing", "pkg/Shadow", "ext/Shadow", "pkg/TestShadowingSuperClass"); }
  @Test public void testStringConcat() { doTest("pkg/TestStringConcat"); }
  @Test public void testJava9StringConcat() { doTest("java9/TestJava9StringConcat"); }
  @Test public void testJava9ModuleInfo() { doTest("java9/module-info"); }
  @Test public void testJava11StringConcat() { doTest("java11/TestJava11StringConcat"); }
  @Test public void testMethodReferenceSameName() { doTest("pkg/TestMethodReferenceSameName"); }
  @Test public void testMethodReferenceLetterClass() { doTest("pkg/TestMethodReferenceLetterClass"); }
  @Test public void testConstructorReference() { doTest("pkg/TestConstructorReference"); }
  @Test public void testMemberAnnotations() { doTest("pkg/TestMemberAnnotations"); }
  @Test public void testMoreAnnotations() { doTest("pkg/MoreAnnotations"); }
  @Test public void testTypeAnnotations() { doTest("pkg/TypeAnnotations"); }
  @Test public void testStaticNameClash() { doTest("pkg/TestStaticNameClash"); }
  @Test public void testExtendingSubclass() { doTest("pkg/TestExtendingSubclass"); }
  @Test public void testSyntheticAccess() { doTest("pkg/TestSyntheticAccess"); }
  @Test public void testIllegalVarName() { doTest("pkg/TestIllegalVarName"); }
  @Test public void testIffSimplification() { doTest("pkg/TestIffSimplification"); }
  @Test public void testKotlinConstructor() { doTest("pkg/TestKotlinConstructorKt"); }
  @Test public void testAsserts() { doTest("pkg/TestAsserts"); }
  @Test public void testLocalsNames() { doTest("pkg/TestLocalsNames"); }
  @Test public void testAnonymousParamNames() { doTest("pkg/TestAnonymousParamNames"); }
  @Test public void testAnonymousParams() { doTest("pkg/TestAnonymousParams"); }
  @Test public void testAccessReplace() { doTest("pkg/TestAccessReplace"); }
  @Test public void testStringLiterals() { doTest("pkg/TestStringLiterals"); }
  @Test public void testPrimitives() { doTest("pkg/TestPrimitives"); }
  @Test public void testClashName() { doTest("pkg/TestClashName", "pkg/SharedName1",
          "pkg/SharedName2", "pkg/SharedName3", "pkg/SharedName4", "pkg/NonSharedName",
          "pkg/TestClashNameParent", "ext/TestClashNameParent","pkg/TestClashNameIface", "ext/TestClashNameIface"); }
  @Test public void testSwitchOnEnum() { doTest("pkg/TestSwitchOnEnum");}
  @Test public void testVarArgCalls() { doTest("pkg/TestVarArgCalls"); }
  @Test public void testLambdaParams() { doTest("pkg/TestLambdaParams"); }
  @Test public void testInterfaceMethods() { doTest("pkg/TestInterfaceMethods"); }
  @Test public void testConstType() { doTest("pkg/TestConstType"); }
  @Test public void testPop2OneDoublePop2() { doTest("pkg/TestPop2OneDoublePop2"); }
  @Test public void testPop2OneLongPop2() { doTest("pkg/TestPop2OneLongPop2"); }
  @Test public void testPop2TwoIntPop2() { doTest("pkg/TestPop2TwoIntPop2"); }
  @Test public void testPop2TwoIntTwoPop() { doTest("pkg/TestPop2TwoIntTwoPop"); }
  @Test public void testSuperInner() { doTest("pkg/TestSuperInner", "pkg/TestSuperInnerBase"); }
  @Test public void testMissingConstructorCallGood() { doTest("pkg/TestMissingConstructorCallGood"); }
  @Test public void testMissingConstructorCallBad() { doTest("pkg/TestMissingConstructorCallBad"); }
  @Test public void testEmptyBlocks() { doTest("pkg/TestEmptyBlocks"); }
  @Test public void testInvertedFloatComparison() { doTest("pkg/TestInvertedFloatComparison"); }
  @Test public void testPrivateEmptyConstructor() { doTest("pkg/TestPrivateEmptyConstructor"); }
  @Test public void testSynchronizedUnprotected() { doTest("pkg/TestSynchronizedUnprotected"); }
  @Test public void testInterfaceSuper() { doTest("pkg/TestInterfaceSuper"); }
  @Test public void testFieldSingleAccess() { doTest("pkg/TestFieldSingleAccess"); }
  @Test public void testPackageInfo() { doTest("pkg/package-info"); }

  // TODO: fix all below
  //@Test public void testSwitchOnStrings() { doTest("pkg/TestSwitchOnStrings");}
  //@Test public void testUnionType() { doTest("pkg/TestUnionType"); }
  //@Test public void testInnerClassConstructor2() { doTest("pkg/TestInner2"); }
  //@Test public void testInUse() { doTest("pkg/TestInUse"); }

  @Test public void testGroovyClass() { doTest("pkg/TestGroovyClass"); }
  @Test public void testGroovyTrait() { doTest("pkg/TestGroovyTrait"); }
  @Test public void testPrivateClasses() { doTest("pkg/PrivateClasses"); }
  @Test public void testSuspendLambda() { doTest("pkg/TestSuspendLambdaKt"); }
  @Test public void testNamedSuspendFun2Kt() { doTest("pkg/TestNamedSuspendFun2Kt"); }
  @Test public void testGenericArgs() { doTest("pkg/TestGenericArgs"); }
  @Test public void testRecordEmpty() { doTest("records/TestRecordEmpty"); }
  @Test public void testRecordSimple() { doTest("records/TestRecordSimple"); }
  @Test public void testRecordVararg() { doTest("records/TestRecordVararg"); }
  @Test public void testRecordGenericVararg() { doTest("records/TestRecordGenericVararg"); }
  @Test public void testRecordAnno() { doTest("records/TestRecordAnno"); }

  @Test public void testInheritanceChainCycle() { doTest("pkg/TestInheritanceChainCycle"); }

  private void doTest(String testFile, String... companionFiles) {
    ConsoleDecompiler decompiler = fixture.getDecompiler();

    File classFile = new File(fixture.getTestDataDir(), "/classes/" + testFile + ".class");
    assertTrue(classFile.isFile());
    for (File file : collectClasses(classFile)) {
      decompiler.addSource(file);
    }

    for (String companionFile : companionFiles) {
      File companionClassFile = new File(fixture.getTestDataDir(), "/classes/" + companionFile + ".class");
      assertTrue(companionClassFile.isFile());
      for (File file : collectClasses(companionClassFile)) {
        decompiler.addSource(file);
      }
    }

    decompiler.decompileContext();

    String testName = classFile.getName().substring(0, classFile.getName().length() - 6);
    File decompiledFile = new File(fixture.getTargetDir(), testName + ".java");
    assertTrue(decompiledFile.isFile());
    File referenceFile = new File(fixture.getTestDataDir(), "results/" + testName + ".dec");
    assertTrue(referenceFile.isFile());
    assertFilesEqual(referenceFile, decompiledFile);
  }

  private static List<File> collectClasses(File classFile) {
    List<File> files = new ArrayList<>();
    files.add(classFile);

    File parent = classFile.getParentFile();
    if (parent != null) {
      final String pattern = classFile.getName().replace(".class", "") + "\\$.+\\.class";
      File[] inner = parent.listFiles((dir, name) -> name.matches(pattern));
      if (inner != null) Collections.addAll(files, inner);
    }

    return files;
  }
}