// Copyright (c) 2021, 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.desugar.desugaredlibrary.jdk11;

import static com.android.tools.r8.desugar.desugaredlibrary.test.CompilationSpecification.DEFAULT_SPECIFICATIONS;
import static com.android.tools.r8.desugar.desugaredlibrary.test.LibraryDesugaringSpecification.JDK11;
import static com.android.tools.r8.desugar.desugaredlibrary.test.LibraryDesugaringSpecification.JDK11_LEGACY;
import static com.android.tools.r8.desugar.desugaredlibrary.test.LibraryDesugaringSpecification.JDK11_PATH;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import com.android.tools.r8.TestParameters;
import com.android.tools.r8.desugar.desugaredlibrary.DesugaredLibraryTestBase;
import com.android.tools.r8.desugar.desugaredlibrary.test.CompilationSpecification;
import com.android.tools.r8.desugar.desugaredlibrary.test.LibraryDesugaringSpecification;
import com.android.tools.r8.transformers.MethodTransformer;
import com.android.tools.r8.utils.AndroidApiLevel;
import com.android.tools.r8.utils.StringUtils;
import com.android.tools.r8.utils.codeinspector.CodeInspector;
import com.android.tools.r8.utils.codeinspector.InstructionSubject;
import com.android.tools.r8.utils.codeinspector.MethodSubject;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import java.io.IOException;
import java.time.Duration;
import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalTime;
import java.time.ZoneId;
import java.time.ZoneOffset;
import java.time.temporal.ChronoUnit;
import java.time.temporal.TemporalUnit;
import java.util.Collection;
import java.util.List;
import java.util.Set;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;
import org.objectweb.asm.Opcodes;

@RunWith(Parameterized.class)
public class JavaTimeJDK11Test extends DesugaredLibraryTestBase {

  private static AndroidApiLevel INTRODUCTION_LEVEL = AndroidApiLevel.S;
  private static Set<String> DURATION_VIRTUAL_INVOKES =
      ImmutableSet.of(
          "toDaysPart",
          "toHoursPart",
          "toMillisPart",
          "toMinutesPart",
          "toNanosPart",
          "toSeconds",
          "toSecondsPart",
          "dividedBy",
          "truncatedTo");
  private static Set<String> LOCAL_TIME_VIRTUAL_INVOKES = ImmutableSet.of("toEpochSecond");
  private static Set<String> LOCAL_TIME_STATIC_INVOKES = ImmutableSet.of("ofInstant");

  private final TestParameters parameters;
  private final LibraryDesugaringSpecification libraryDesugaringSpecification;
  private final CompilationSpecification compilationSpecification;

  private static final String EXPECTED_RESULT =
      StringUtils.lines("0", "1", "2", "3", "4", "5", "6", "7", "8", "00:00", "0");

  @Parameters(name = "{0}, spec: {1}, {2}")
  public static List<Object[]> data() {
    return buildParameters(
        getTestParameters().withDexRuntimes().withAllApiLevels().build(),
        ImmutableList.of(JDK11, JDK11_PATH, JDK11_LEGACY),
        DEFAULT_SPECIFICATIONS);
  }

  public JavaTimeJDK11Test(
      TestParameters parameters,
      LibraryDesugaringSpecification libraryDesugaringSpecification,
      CompilationSpecification compilationSpecification) {
    this.parameters = parameters;
    this.libraryDesugaringSpecification = libraryDesugaringSpecification;
    this.compilationSpecification = compilationSpecification;
  }

  @Test
  public void test() throws Throwable {
    testForDesugaredLibrary(parameters, libraryDesugaringSpecification, compilationSpecification)
        .addProgramClassFileData(getProgramClassFileData())
        .addKeepMainRule(TestClass.class)
        .compile()
        .inspect(this::assertCalls)
        .run(parameters.getRuntime(), TestClass.class)
        .assertSuccessWithOutput(EXPECTED_RESULT);
  }

  private void assertCalls(CodeInspector inspector) {
    MethodSubject mainMethod = inspector.clazz(TestClass.class).mainMethod();
    assertTrue(mainMethod.isPresent());
    mainMethod
        .streamInstructions()
        .forEach(
            i -> {
              if (i.isInvoke()) {
                if (libraryDesugaringSpecification.hasTimeDesugaring(parameters)
                    && libraryDesugaringSpecification != JDK11_LEGACY) {
                  checkInvokeTime(i, "j$.time.Duration", "j$.time.LocalTime");
                  return;
                }
                if (parameters.getApiLevel().isLessThan(INTRODUCTION_LEVEL)) {
                  checkInvokeTime(i, "j$.time.DesugarDuration", "j$.time.DesugarLocalTime");
                  return;
                }
                checkInvokeTime(i, "java.time.Duration", "java.time.LocalTime");
              }
            });
  }

  private void checkInvokeTime(InstructionSubject i, String duration, String localTime) {
    String name = i.getMethod().getName().toString();
    if (DURATION_VIRTUAL_INVOKES.contains(name)) {
      assertEquals(duration, i.getMethod().getHolderType().toString());
    }
    if (LOCAL_TIME_STATIC_INVOKES.contains(name) || LOCAL_TIME_VIRTUAL_INVOKES.contains(name)) {
      assertEquals(localTime, i.getMethod().getHolderType().toString());
    }
  }

  private Collection<byte[]> getProgramClassFileData() throws IOException {
    return ImmutableList.of(
        transformer(TestClass.class)
            .addMethodTransformer(
                new MethodTransformer() {
                  @Override
                  public void visitMethodInsn(
                      int opcode,
                      String owner,
                      String name,
                      String descriptor,
                      boolean isInterface) {
                    if (opcode == Opcodes.INVOKESTATIC) {
                      if (DURATION_VIRTUAL_INVOKES.contains(name)) {
                        super.visitMethodInsn(
                            Opcodes.INVOKEVIRTUAL,
                            "java/time/Duration",
                            name,
                            withoutFirstObjectArg(descriptor),
                            isInterface);
                        return;
                      }
                      if (LOCAL_TIME_VIRTUAL_INVOKES.contains(name)) {
                        super.visitMethodInsn(
                            Opcodes.INVOKEVIRTUAL,
                            "java/time/LocalTime",
                            name,
                            withoutFirstObjectArg(descriptor),
                            isInterface);
                        return;
                      }
                      if (LOCAL_TIME_STATIC_INVOKES.contains(name)) {
                        super.visitMethodInsn(
                            opcode, "java/time/LocalTime", name, descriptor, isInterface);
                        return;
                      }
                    }
                    super.visitMethodInsn(opcode, owner, name, descriptor, isInterface);
                  }
                })
            .transform());
  }

  private String withoutFirstObjectArg(String descriptor) {
    int i = descriptor.indexOf(";");
    return "(" + descriptor.substring(i + 1);
  }

  public static class TestClass {

    public static void main(String[] args) {
      // Test all java.time.Duration methods added in Android S (where added in JDK 9).
      System.out.println(toSecondsPart(truncatedTo(Duration.ofSeconds(62), ChronoUnit.MINUTES)));
      System.out.println(toDaysPart(Duration.ofHours(31)));
      System.out.println(toHoursPart(Duration.ofHours(26)));
      System.out.println(toSeconds(Duration.ofSeconds(3)));
      System.out.println(toSecondsPart(Duration.ofSeconds(64)));
      System.out.println(toMinutesPart(Duration.ofSeconds(301)));
      System.out.println(toMillisPart(Duration.ofNanos(6000002)));
      System.out.println(toNanosPart(Duration.ofNanos(1000000007)));
      System.out.println(dividedBy(Duration.ofHours(4), Duration.ofMinutes(30)));

      // Test all java.time.LocalTime methods added in Android S (where added in JDK 9).
      System.out.println(ofInstant(Instant.ofEpochSecond(0), ZoneId.of("UTC")));
      System.out.println(
          toEpochSecond(LocalTime.of(0, 0), LocalDate.ofEpochDay(0), ZoneOffset.UTC));
    }

    // Replaced in the transformer by JDK 11 virtual Duration#toDaysPart().
    private static long toDaysPart(Duration receiver) {
      return -1;
    }

    // Replaced in the transformer by JDK 11 virtual Duration#toHoursPart().
    private static int toHoursPart(Duration receiver) {
      return -1;
    }

    // Replaced in the transformer by JDK 11 virtual Duration#toMillisPart().
    private static int toMillisPart(Duration receiver) {
      return -1;
    }

    // Replaced in the transformer by JDK 11 virtual Duration#toMinutesPart().
    private static int toMinutesPart(Duration receiver) {
      return -1;
    }

    // Replaced in the transformer by JDK 11 virtual Duration#toNanosPart().
    private static int toNanosPart(Duration receiver) {
      return -1;
    }

    // Replaced in the transformer by JDK 11 virtual Duration#toSeconds().
    private static long toSeconds(Duration receiver) {
      return -1;
    }

    // Replaced in the transformer by JDK 11 virtual Duration#toSecondsPart().
    private static int toSecondsPart(Duration receiver) {
      return -1;
    }

    // Replaced in the transformer by JDK 11 virtual Duration#dividedBy(Duration).
    private static long dividedBy(Duration receiver, Duration divisor) {
      return -1;
    }

    // Replaced in the transformer by JDK 11 virtual Duration#truncatedTo(TemporalUnit).
    private static Duration truncatedTo(Duration receiver, TemporalUnit unit) {
      return null;
    }

    // Replaced in the transformer by JDK 11 static LocalTime#ofInstant.
    private static LocalTime ofInstant(Instant instant, ZoneId zone) {
      return null;
    }

    // Replaced in the transformer by JDK 11 virtual LocalTime#toEpochSecond.
    private static long toEpochSecond(LocalTime receiver, LocalDate date, ZoneOffset offset) {
      return -1;
    }
  }
}