// Copyright (c) 2018, 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;

import com.android.tools.r8.ToolHelper.ProcessResult;
import com.android.tools.r8.debug.CfDebugTestConfig;
import com.android.tools.r8.debug.DebugTestConfig;
import com.android.tools.r8.errors.Unimplemented;
import com.android.tools.r8.utils.AndroidApp;
import com.android.tools.r8.utils.FileUtils;
import com.google.common.collect.ObjectArrays;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;

public class JvmTestBuilder extends TestBuilder<JvmTestRunResult, JvmTestBuilder> {

  // Ordered list of classpath entries.
  private List<Path> classpath = new ArrayList<>();

  private AndroidApp.Builder builder = AndroidApp.builder();

  private JvmTestBuilder(TestState state) {
    super(state);
  }

  public static JvmTestBuilder create(TestState state) {
    return new JvmTestBuilder(state);
  }

  @Override
  JvmTestBuilder self() {
    return this;
  }

  @Override
  public JvmTestRunResult run(String mainClass) throws IOException {
    ProcessResult result = ToolHelper.runJava(classpath, mainClass);
    return new JvmTestRunResult(builder.build(), result);
  }

  public JvmTestRunResult run(TestRuntime runtime, String mainClass, String... args)
      throws IOException {
    assert runtime.isCf();
    ProcessResult result =
        ToolHelper.runJava(runtime.asCf().getVm(), classpath, ObjectArrays.concat(mainClass, args));
    return new JvmTestRunResult(builder.build(), result);
  }

  @Override
  public DebugTestConfig debugConfig() {
    return new CfDebugTestConfig().addPaths(classpath);
  }

  @Override
  public JvmTestBuilder addLibraryFiles(Collection<Path> files) {
    throw new Unimplemented("No support for changing the Java runtime library.");
  }

  @Override
  public JvmTestBuilder addLibraryClasses(Collection<Class<?>> classes) {
    throw new Unimplemented("No support for changing the Java runtime library.");
  }

  @Override
  public JvmTestBuilder addProgramClasses(Collection<Class<?>> classes) {
    try {
      Path out = getState().getNewTempFolder().resolve("out.jar");
      TestBase.writeClassesToJar(out, classes);
      addProgramFiles(out);
      return self();
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }

  @Override
  public JvmTestBuilder addProgramFiles(Collection<Path> files) {
    for (Path file : files) {
      if (FileUtils.isArchive(file)) {
        classpath.add(file);
        builder.addProgramFiles(file);
      } else if (FileUtils.isClassFile(file)) {
        try {
          addProgramClassFileData(Files.readAllBytes(file));
        } catch (IOException e) {
          throw new RuntimeException(e);
        }
      } else {
        throw new Unimplemented("No support for adding file: " + file);
      }
    }
    return self();
  }

  @Override
  public JvmTestBuilder addProgramClassFileData(Collection<byte[]> files) {
    try {
      Path out = getState().getNewTempFolder().resolve("out.jar");
      TestBase.writeClassFileDataToJar(out, files);
      addProgramFiles(out);
      return self();
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }

  @Override
  public JvmTestBuilder addProgramDexFileData(Collection<byte[]> data) {
    throw new Unimplemented("No support for adding dex file data directly");
  }

  public JvmTestBuilder addClasspath(Path... paths) {
    return addClasspath(Arrays.asList(paths));
  }

  public JvmTestBuilder addClasspath(List<Path> paths) {
    for (Path path : paths) {
      assert Files.isDirectory(path) || FileUtils.isArchive(path);
      classpath.add(path);
    }
    return self();
  }

  public JvmTestBuilder addTestClasspath() {
    return addClasspath(ToolHelper.getClassPathForTests());
  }
}