// 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.D8Command.Builder;
import com.android.tools.r8.TestBase.Backend;
import com.android.tools.r8.desugar.desugaredlibrary.DesugaredLibraryTestBase.KeepRuleConsumer;
import com.android.tools.r8.origin.Origin;
import com.android.tools.r8.utils.AndroidApiLevel;
import com.android.tools.r8.utils.AndroidApp;
import com.android.tools.r8.utils.InternalOptions;
import java.nio.file.Path;
import java.util.Arrays;
import java.util.Collection;
import java.util.function.Consumer;
import java.util.function.Supplier;

public class D8TestBuilder
    extends TestCompilerBuilder<
        D8Command, Builder, D8TestCompileResult, D8TestRunResult, D8TestBuilder> {

  private D8TestBuilder(TestState state, Builder builder, Backend backend) {
    super(state, builder, backend);
  }

  public static D8TestBuilder create(TestState state, Backend backend) {
    return new D8TestBuilder(state, D8Command.builder(state.getDiagnosticsHandler()), backend);
  }

  private StringBuilder proguardMapOutputBuilder = null;

  @Override
  D8TestBuilder self() {
    return this;
  }

  public Builder getBuilder() {
    return builder;
  }

  public D8TestBuilder addProgramResourceProviders(Collection<ProgramResourceProvider> providers) {
    for (ProgramResourceProvider provider : providers) {
      builder.addProgramResourceProvider(provider);
    }
    return self();
  }

  public D8TestBuilder addProgramResourceProviders(ProgramResourceProvider... providers) {
    return addProgramResourceProviders(Arrays.asList(providers));
  }

  @Override
  public D8TestBuilder addClasspathClasses(Collection<Class<?>> classes) {
    builder.addClasspathResourceProvider(ClassFileResourceProviderFromClasses(classes));
    return self();
  }

  @Override
  public D8TestBuilder addClasspathFiles(Collection<Path> files) {
    builder.addClasspathFiles(files);
    return self();
  }

  @Override
  D8TestCompileResult internalCompile(
      Builder builder, Consumer<InternalOptions> optionsConsumer, Supplier<AndroidApp> app)
      throws CompilationFailedException {
    ToolHelper.runD8(builder, optionsConsumer);
    return new D8TestCompileResult(
        getState(), app.get(), minApiLevel, getOutputMode(), getMapContent());
  }

  private String getMapContent() {
    return proguardMapOutputBuilder == null ? null : proguardMapOutputBuilder.toString();
  }

  public D8TestBuilder setIntermediate(boolean intermediate) {
    builder.setIntermediate(intermediate);
    return self();
  }

  @Override
  public D8TestBuilder enableCoreLibraryDesugaring(
      AndroidApiLevel minApiLevel,
      KeepRuleConsumer keepRuleConsumer,
      StringResource desugaredLibraryConfiguration) {
    if (minApiLevel.getLevel() < AndroidApiLevel.O.getLevel()) {
      super.enableCoreLibraryDesugaring(
          minApiLevel, keepRuleConsumer, desugaredLibraryConfiguration);
      builder.setDesugaredLibraryKeepRuleConsumer(keepRuleConsumer);
    }
    return self();
  }

  public D8TestBuilder addMainDexRulesFiles(Path... mainDexRuleFiles) {
    builder.addMainDexRulesFiles(mainDexRuleFiles);
    return self();
  }

  public D8TestBuilder addMainDexRules(String... rules) {
    builder.addMainDexRules(Arrays.asList(rules), Origin.unknown());
    return self();
  }

  public D8TestBuilder addMainDexKeepClassRules(Class<?>... classes) {
    for (Class<?> clazz : classes) {
      addMainDexRules("-keep class " + clazz.getTypeName());
    }
    return self();
  }

  public D8TestBuilder addMainDexKeepClassAndMemberRules(Class<?>... classes) {
    for (Class<?> clazz : classes) {
      addMainDexRules("-keep class " + clazz.getTypeName() + " { *; }");
    }
    return self();
  }

  // TODO(b/183125319): Make this the default as part of API support in D8.
  public D8TestBuilder internalEnableMappingOutput() {
    assert proguardMapOutputBuilder == null;
    proguardMapOutputBuilder = new StringBuilder();
    // TODO(b/183125319): Use the API once supported in D8.
    addOptionsModification(
        o -> o.proguardMapConsumer = (s, h) -> proguardMapOutputBuilder.append(s));
    return self();
  }
}