// 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.kotlin.metadata;

import static com.android.tools.r8.KotlinCompilerTool.KOTLINC;
import static com.android.tools.r8.utils.codeinspector.Matchers.isPresent;
import static junit.framework.TestCase.assertEquals;
import static junit.framework.TestCase.assertNotNull;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.junit.Assert.assertNull;

import com.android.tools.r8.TestParameters;
import com.android.tools.r8.ToolHelper;
import com.android.tools.r8.ToolHelper.KotlinTargetVersion;
import com.android.tools.r8.kotlin.KotlinMetadataWriter;
import com.android.tools.r8.shaking.ProguardKeepAttributes;
import com.android.tools.r8.utils.StringUtils;
import com.android.tools.r8.utils.codeinspector.ClassSubject;
import com.android.tools.r8.utils.codeinspector.CodeInspector;
import com.android.tools.r8.utils.codeinspector.FoundClassSubject;
import java.io.IOException;
import java.nio.file.Path;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ExecutionException;
import kotlinx.metadata.jvm.KotlinClassHeader;
import kotlinx.metadata.jvm.KotlinClassMetadata;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;

@RunWith(Parameterized.class)
public class MetadataRewriteBoxedTypesTest extends KotlinMetadataTestBase {

  private final String EXPECTED =
      StringUtils.lines("false", "0", "a", "0.042", "0.42", "42", "442", "1", "2", "42", "42");

  @Parameterized.Parameters(name = "{0} target: {1}")
  public static Collection<Object[]> data() {
    return buildParameters(
        getTestParameters().withCfRuntimes().build(), KotlinTargetVersion.values());
  }

  public MetadataRewriteBoxedTypesTest(
      TestParameters parameters, KotlinTargetVersion targetVersion) {
    super(targetVersion);
    this.parameters = parameters;
  }

  private static Map<KotlinTargetVersion, Path> libJars = new HashMap<>();
  private final TestParameters parameters;

  @BeforeClass
  public static void createLibJar() throws Exception {
    String baseLibFolder = PKG_PREFIX + "/box_primitives_lib";
    for (KotlinTargetVersion targetVersion : KotlinTargetVersion.values()) {
      Path baseLibJar =
          kotlinc(KOTLINC, targetVersion)
              .addSourceFiles(getKotlinFileInTest(baseLibFolder, "lib"))
              .compile();
      libJars.put(targetVersion, baseLibJar);
    }
  }

  @Test
  public void smokeTest() throws Exception {
    Path libJar = libJars.get(targetVersion);
    Path output =
        kotlinc(parameters.getRuntime().asCf(), KOTLINC, targetVersion)
            .addClasspathFiles(libJar)
            .addSourceFiles(getKotlinFileInTest(PKG_PREFIX + "/box_primitives_app", "main"))
            .setOutputPath(temp.newFolder().toPath())
            .compile();
    testForJvm()
        .addRunClasspathFiles(ToolHelper.getKotlinStdlibJar(), libJar)
        .addClasspath(output)
        .run(parameters.getRuntime(), PKG + ".box_primitives_app.MainKt")
        .assertSuccessWithOutput(EXPECTED);
  }

  @Test
  public void smokeTestReflection() throws Exception {
    Path libJar = libJars.get(targetVersion);
    Path output =
        kotlinc(parameters.getRuntime().asCf(), KOTLINC, targetVersion)
            .addClasspathFiles(libJar)
            .addSourceFiles(getKotlinFileInTest(PKG_PREFIX + "/box_primitives_app", "main_reflect"))
            .setOutputPath(temp.newFolder().toPath())
            .compile();
    testForJvm()
        .addVmArguments("-ea")
        .addRunClasspathFiles(
            ToolHelper.getKotlinStdlibJar(), ToolHelper.getKotlinReflectJar(), libJar)
        .addClasspath(output)
        .run(parameters.getRuntime(), PKG + ".box_primitives_app.Main_reflectKt")
        .assertSuccessWithOutput(EXPECTED);
  }

  @Test
  public void testMetadataForLib() throws Exception {
    Path libJar =
        testForR8(parameters.getBackend())
            .addClasspathFiles(ToolHelper.getKotlinStdlibJar())
            .addProgramFiles(libJars.get(targetVersion))
            .addKeepAllClassesRule()
            .addKeepAttributes(
                ProguardKeepAttributes.RUNTIME_VISIBLE_ANNOTATIONS,
                ProguardKeepAttributes.SIGNATURE,
                ProguardKeepAttributes.INNER_CLASSES,
                ProguardKeepAttributes.ENCLOSING_METHOD)
            .compile()
            .inspect(this::inspect)
            .writeToZip();
    Path main =
        kotlinc(parameters.getRuntime().asCf(), KOTLINC, targetVersion)
            .addClasspathFiles(libJar)
            .addSourceFiles(getKotlinFileInTest(PKG_PREFIX + "/box_primitives_app", "main"))
            .setOutputPath(temp.newFolder().toPath())
            .compile();
    testForJvm()
        .addRunClasspathFiles(
            ToolHelper.getKotlinStdlibJar(), ToolHelper.getKotlinReflectJar(), libJar)
        .addClasspath(main)
        .run(parameters.getRuntime(), PKG + ".box_primitives_app.MainKt")
        .assertSuccessWithOutput(EXPECTED);
  }

  private void inspect(CodeInspector inspector) throws IOException, ExecutionException {
    // Since this has a keep-all classes rule, we should just assert that the meta-data is equal to
    // the original one.
    CodeInspector stdLibInspector = new CodeInspector(libJars.get(targetVersion));
    for (FoundClassSubject clazzSubject : stdLibInspector.allClasses()) {
      ClassSubject r8Clazz = inspector.clazz(clazzSubject.getOriginalName());
      assertThat(r8Clazz, isPresent());
      KotlinClassMetadata originalMetadata = clazzSubject.getKotlinClassMetadata();
      KotlinClassMetadata rewrittenMetadata = r8Clazz.getKotlinClassMetadata();
      if (originalMetadata == null) {
        assertNull(rewrittenMetadata);
        continue;
      }
      assertNotNull(rewrittenMetadata);
      KotlinClassHeader originalHeader = originalMetadata.getHeader();
      KotlinClassHeader rewrittenHeader = rewrittenMetadata.getHeader();
      assertEquals(originalHeader.getKind(), rewrittenHeader.getKind());
      assertEquals(originalHeader.getPackageName(), rewrittenHeader.getPackageName());
      // We cannot assert equality of the data since it may be ordered differently. Instead we use
      // the KotlinMetadataWriter.
      String expected = KotlinMetadataWriter.kotlinMetadataToString("", originalMetadata);
      String actual = KotlinMetadataWriter.kotlinMetadataToString("", rewrittenMetadata);
      assertEquals(expected, actual);
    }
  }

  @Test
  public void testMetadataForReflect() throws Exception {
    Path libJar =
        testForR8(parameters.getBackend())
            .addClasspathFiles(ToolHelper.getKotlinStdlibJar())
            .addProgramFiles(libJars.get(targetVersion))
            .addKeepAllClassesRule()
            .addKeepAttributes(
                ProguardKeepAttributes.RUNTIME_VISIBLE_ANNOTATIONS,
                ProguardKeepAttributes.SIGNATURE,
                ProguardKeepAttributes.INNER_CLASSES,
                ProguardKeepAttributes.ENCLOSING_METHOD)
            .compile()
            .writeToZip();
    Path main =
        kotlinc(parameters.getRuntime().asCf(), KOTLINC, targetVersion)
            .addClasspathFiles(libJar)
            .addSourceFiles(getKotlinFileInTest(PKG_PREFIX + "/box_primitives_app", "main_reflect"))
            .setOutputPath(temp.newFolder().toPath())
            .compile();
    testForJvm()
        .addVmArguments("-ea")
        .addRunClasspathFiles(
            ToolHelper.getKotlinStdlibJar(), ToolHelper.getKotlinReflectJar(), libJar)
        .addClasspath(main)
        .run(parameters.getRuntime(), PKG + ".box_primitives_app.Main_reflectKt")
        .assertSuccessWithOutput(EXPECTED);
  }
}