// Copyright (c) 2020, the R8 project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
package com.android.tools.r8.enumunboxing;

import static org.junit.Assert.assertTrue;

import com.android.tools.r8.NeverClassInline;
import com.android.tools.r8.NeverInline;
import com.android.tools.r8.R8TestRunResult;
import com.android.tools.r8.TestParameters;
import com.android.tools.r8.enumunboxing.examplelib1.JavaLibrary1;
import com.android.tools.r8.enumunboxing.examplelib2.JavaLibrary2;
import com.android.tools.r8.ir.optimize.enums.EnumUnboxingRewriter;
import com.android.tools.r8.references.Reference;
import com.android.tools.r8.utils.BooleanUtils;
import com.android.tools.r8.utils.codeinspector.CodeInspector;
import java.nio.file.Path;
import java.util.List;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;

// In this test enum unboxing is performed twice cf to cf then once cf to dex. The enum unboxing
// utility class is required in all the cases, and R8 should not conflict with multiple enum
// unboxing utility synthesized classes provided as input.
@RunWith(Parameterized.class)
public class DoubleProcessingMergeEnumUnboxingTest extends EnumUnboxingTestBase {
  private final TestParameters parameters;
  private final boolean enumValueOptimization;
  private final KeepRule enumKeepRules;
  private final boolean minification;

  @Parameters(name = "{0} valueOpt: {1} keep: {2} minif: {3}")
  public static List<Object[]> data() {
    return buildParameters(
        getTestParameters().withDexRuntimes().withAllApiLevels().build(),
        BooleanUtils.values(),
        getAllEnumKeepRules(),
        BooleanUtils.values());
  }

  public DoubleProcessingMergeEnumUnboxingTest(
      TestParameters parameters,
      boolean enumValueOptimization,
      KeepRule enumKeepRules,
      boolean minification) {
    this.parameters = parameters;
    this.enumValueOptimization = enumValueOptimization;
    this.enumKeepRules = enumKeepRules;
    this.minification = minification;
  }

  @Test
  public void testEnumUnboxing() throws Exception {
    // Compile the lib cf to cf.
    Path javaLibShrunk1 = compileLibrary(JavaLibrary1.class, JavaLibrary1.LibEnum1.class);
    Path javaLibShrunk2 = compileLibrary(JavaLibrary2.class, JavaLibrary2.LibEnum2.class);
    // Compile the app with the lib.
    R8TestRunResult run =
        testForR8(parameters.getBackend())
            .addProgramClasses(App.class, App.AppEnum.class)
            .addProgramFiles(javaLibShrunk1, javaLibShrunk2)
            .addKeepMainRule(App.class)
            .addKeepRules(enumKeepRules.getKeepRule())
            .enableNeverClassInliningAnnotations()
            .enableInliningAnnotations()
            .addOptionsModification(opt -> enableEnumOptions(opt, enumValueOptimization))
            .allowDiagnosticInfoMessages()
            .setMinApi(parameters.getApiLevel())
            .compile()
            .inspect(this::assertUtilityClassPresent)
            .inspectDiagnosticMessages(
                m -> assertEnumIsUnboxed(App.AppEnum.class, App.class.getSimpleName(), m))
            .run(parameters.getRuntime(), App.class)
            .assertSuccess();
    assertLines2By2Correct(run.getStdOut());
  }

  private Path compileLibrary(Class<?> libClass, Class<?> enumLibClass) throws Exception {
    return testForR8(Backend.CF)
        .addProgramClasses(libClass, enumLibClass)
        .addKeepMethodRules(Reference.methodFromMethod(libClass.getDeclaredMethod("libCall")))
        .addKeepRules(enumKeepRules.getKeepRule())
        .enableNeverClassInliningAnnotations()
        .enableInliningAnnotations()
        .minification(minification)
        .setMinApi(parameters.getApiLevel())
        .compile()
        .writeToZip();
  }

  private void assertUtilityClassPresent(CodeInspector codeInspector) {
    assertTrue(
        codeInspector.allClasses().stream()
            .anyMatch(
                c ->
                    c.getOriginalName()
                        .contains(EnumUnboxingRewriter.ENUM_UNBOXING_UTILITY_CLASS_NAME)));
  }

  static class App {
    @NeverClassInline
    enum AppEnum {
      A,
      B
    }

    @NeverInline
    static AppEnum getEnum() {
      return System.currentTimeMillis() > 0 ? AppEnum.A : AppEnum.B;
    }

    public static void main(String[] args) {
      System.out.println(getEnum().ordinal());
      System.out.println(0);
      JavaLibrary1.libCall();
      JavaLibrary2.libCall();
    }
  }
}