// Copyright 2015 The Bazel Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.devtools.build.android;

import static com.google.common.collect.Streams.concat;
import static java.util.stream.Collectors.toList;

import com.android.utils.StdLogger;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;
import com.google.devtools.build.android.AndroidResourceProcessingAction.Options;
import com.google.devtools.build.android.aapt2.Aapt2ConfigOptions;
import com.google.devtools.build.android.aapt2.CompiledResources;
import com.google.devtools.build.android.aapt2.PackagedResources;
import com.google.devtools.build.android.aapt2.ResourceCompiler;
import com.google.devtools.build.android.aapt2.ResourceLinker;
import com.google.devtools.build.android.aapt2.StaticLibrary;
import com.google.devtools.common.options.OptionsParser;
import com.google.devtools.common.options.ShellQuotedParamsFilePreProcessor;
import com.google.devtools.common.options.TriState;
import java.io.IOException;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.List;

/**
 * Provides an entry point for the resource processing using the AOSP build tools.
 *
 * <pre>
 * Example Usage:
 *   java/com/google/build/android/Aapt2ResourcePackagingAction\
 *      --sdkRoot path/to/sdk\
 *      --aapt path/to/sdk/aapt\
 *      --adb path/to/sdk/adb\
 *      --zipAlign path/to/sdk/zipAlign\
 *      --androidJar path/to/sdk/androidJar\
 *      --manifestOutput path/to/manifest\
 *      --primaryData path/to/resources:path/to/assets:path/to/manifest\
 *      --data p/t/res1:p/t/assets1:p/t/1/AndroidManifest.xml:p/t/1/R.txt:symbols,\
 *             p/t/res2:p/t/assets2:p/t/2/AndroidManifest.xml:p/t/2/R.txt:symbols\
 *      --packagePath path/to/write/archive.ap_\
 *      --srcJarOutput path/to/write/archive.srcjar
 * </pre>
 */
public class Aapt2ResourcePackagingAction {

  private static final StdLogger STD_LOGGER = new StdLogger(StdLogger.Level.WARNING);

  private static Aapt2ConfigOptions aaptConfigOptions;
  private static Options options;

  public static void main(String[] args) throws Exception {
    Profiler profiler = InMemoryProfiler.createAndStart("setup");
    OptionsParser optionsParser =
        OptionsParser.builder()
            .optionsClasses(Options.class, Aapt2ConfigOptions.class)
            .argsPreProcessor(new ShellQuotedParamsFilePreProcessor(FileSystems.getDefault()))
            .build();
    optionsParser.parseAndExitUponError(args);
    aaptConfigOptions = optionsParser.getOptions(Aapt2ConfigOptions.class);
    options = optionsParser.getOptions(Options.class);

    // legacy option inherited from Options.class
    Preconditions.checkArgument(options.prefilteredResources.isEmpty());

    try (ScopedTemporaryDirectory scopedTmp =
            new ScopedTemporaryDirectory("android_resources_tmp");
        ExecutorServiceCloser executorService = ExecutorServiceCloser.createWithFixedPoolOf(15)) {
      final Path tmp = scopedTmp.getPath();
      final Path densityManifest = tmp.resolve("manifest-filtered/AndroidManifest.xml");
      final Path processedManifest = tmp.resolve("manifest-processed/AndroidManifest.xml");
      final Path symbols = tmp.resolve("symbols/symbols.bin");
      final Path databindingResourcesRoot =
          Files.createDirectories(tmp.resolve("android_data_binding_resources"));
      final Path compiledResources = Files.createDirectories(tmp.resolve("compiled"));
      final Path linkedOut = Files.createDirectories(tmp.resolve("linked"));
      final AndroidDataDeserializer dataDeserializer = AndroidCompiledDataDeserializer.create();
      final ResourceCompiler compiler =
          ResourceCompiler.create(
              executorService,
              compiledResources,
              aaptConfigOptions.aapt2,
              aaptConfigOptions.buildToolsVersion,
              aaptConfigOptions.generatePseudoLocale);

      profiler.recordEndOf("setup").startTask("compile");
      CompiledResources compiled =
          options
              .primaryData
              .processDataBindings(
                  options.dataBindingInfoOut, options.packageForR, databindingResourcesRoot)
              .compile(compiler, compiledResources)
              .processManifest(
                  manifest ->
                      AndroidManifestProcessor.with(STD_LOGGER)
                          .processManifest(
                              options.applicationId,
                              options.versionCode,
                              options.versionName,
                              manifest,
                              processedManifest))
              .processManifest(
                  manifest ->
                      new DensitySpecificManifestProcessor(options.densities, densityManifest)
                          .process(manifest));

      profiler.recordEndOf("compile").startTask("merge");

      // Checks for merge conflicts, and write the merged data out.
      final Path symbolsBin =
          AndroidResourceMerger.mergeDataToSymbols(
              ParsedAndroidData.loadedFrom(
                  DependencyInfo.DependencyType.PRIMARY,
                  ImmutableList.of(SerializedAndroidData.from(compiled)),
                  executorService,
                  dataDeserializer),
              new DensitySpecificManifestProcessor(options.densities, densityManifest)
                  .process(options.primaryData.getManifest()),
              ImmutableList.<SerializedAndroidData>builder()
                  .addAll(options.directData)
                  .addAll(options.directAssets)
                  .build(),
              ImmutableList.<SerializedAndroidData>builder()
                  .addAll(options.transitiveData)
                  .addAll(options.transitiveAssets)
                  .build(),
              options.packageType,
              symbols,
              dataDeserializer,
              options.throwOnResourceConflict,
              executorService);
      if (options.symbolsOut != null) {
        Files.copy(symbolsBin, options.symbolsOut);
      }

      profiler.recordEndOf("merge").startTask("link");
      // Write manifestOutput now before the dummy manifest is created.
      if (options.manifestOutput != null) {
        AndroidResourceOutputs.copyManifestToOutput(compiled, options.manifestOutput);
      }

      List<CompiledResources> compiledResourceDeps =
          // Last defined dependencies will overwrite previous one, so always place direct
          // after transitive.
          concat(options.transitiveData.stream(), options.directData.stream())
              .map(DependencyAndroidData::getCompiledSymbols)
              .collect(toList());

      // NB: "-A" options are in *decreasing* precedence, while "-R" options are in *increasing*
      // precedence.  While this is internally inconsistent, it matches AAPTv1's treatment of "-A".
      List<Path> assetDirs =
          concat(
                  options.primaryData.assetDirs.stream(),
                  concat(
                          options.directData.stream(),
                          options.directAssets.stream(),
                          options.transitiveData.stream(),
                          options.transitiveAssets.stream())
                      .flatMap(dep -> dep.assetDirs.stream()))
              .collect(toList());

      final PackagedResources packagedResources =
          ResourceLinker.create(aaptConfigOptions.aapt2, executorService, linkedOut)
              .profileUsing(profiler)
              .customPackage(options.packageForR)
              .outputAsProto(aaptConfigOptions.resourceTableAsProto)
              .dependencies(ImmutableList.of(StaticLibrary.from(aaptConfigOptions.androidJar)))
              .include(compiledResourceDeps)
              .withAssets(assetDirs)
              .buildVersion(aaptConfigOptions.buildToolsVersion)
              .conditionalKeepRules(aaptConfigOptions.conditionalKeepRules == TriState.YES)
              .filterToDensity(options.densities)
              .storeUncompressed(aaptConfigOptions.uncompressedExtensions)
              .debug(aaptConfigOptions.debug)
              .includeGeneratedLocales(aaptConfigOptions.generatePseudoLocale)
              .includeOnlyConfigs(aaptConfigOptions.resourceConfigs)
              .link(compiled);
      profiler.recordEndOf("link");

      if (options.packagePath != null) {
        copy(packagedResources.apk(), options.packagePath);
      }
      if (options.proguardOutput != null) {
        copy(packagedResources.proguardConfig(), options.proguardOutput);
      }
      if (options.mainDexProguardOutput != null) {
        copy(packagedResources.mainDexProguard(), options.mainDexProguardOutput);
      }
      if (options.srcJarOutput != null) {
        AndroidResourceOutputs.createSrcJar(
            packagedResources.javaSourceDirectory(), options.srcJarOutput, /* staticIds= */ false);
      }
      if (options.rOutput != null) {
        copy(packagedResources.rTxt(), options.rOutput);
      }
      if (options.resourcesOutput != null) {
        packagedResources.asArchive().writeTo(options.resourcesOutput, /* compress= */ false);
      }
    }
  }

  private static void copy(Path from, Path out) throws IOException {
    Files.createDirectories(out.getParent());
    Files.copy(from, out);
  }
}