// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'dart:typed_data';

import 'package:args/args.dart';
import 'package:file/memory.dart';
import 'package:file_testing/file_testing.dart';
import 'package:flutter_tools/src/artifacts.dart';
import 'package:flutter_tools/src/asset.dart';
import 'package:flutter_tools/src/base/config.dart';
import 'package:flutter_tools/src/base/file_system.dart';
import 'package:flutter_tools/src/base/logger.dart';
import 'package:flutter_tools/src/build_info.dart';
import 'package:flutter_tools/src/build_system/build_system.dart';
import 'package:flutter_tools/src/bundle.dart' hide defaultManifestPath;
import 'package:flutter_tools/src/bundle_builder.dart';
import 'package:flutter_tools/src/devfs.dart';
import 'package:flutter_tools/src/device.dart';
import 'package:flutter_tools/src/flutter_manifest.dart';
import 'package:flutter_tools/src/globals.dart' as globals;
import 'package:flutter_tools/src/project.dart';
import 'package:test/fake.dart';

import '../src/common.dart';
import '../src/context.dart';
import '../src/test_build_system.dart';

// Tests for BundleBuilder.
void main() {
  testUsingContext('Copies assets to expected directory after building', () async {
    final BuildSystem buildSystem = TestBuildSystem.all(
      BuildResult(success: true),
      (Target target, Environment environment) {
        environment.outputDir.childFile('kernel_blob.bin').createSync(recursive: true);
        environment.outputDir.childFile('isolate_snapshot_data').createSync();
        environment.outputDir.childFile('vm_snapshot_data').createSync();
        environment.outputDir.childFile('LICENSE').createSync(recursive: true);
      }
    );

    await BundleBuilder().build(
      platform: TargetPlatform.ios,
      buildInfo: BuildInfo.debug,
      project: FlutterProject.fromDirectoryTest(globals.fs.currentDirectory),
      mainPath: globals.fs.path.join('lib', 'main.dart'),
      assetDirPath: 'example',
      depfilePath: 'example.d',
      buildSystem: buildSystem
    );
    expect(globals.fs.file(globals.fs.path.join('example', 'kernel_blob.bin')).existsSync(), true);
    expect(globals.fs.file(globals.fs.path.join('example', 'LICENSE')).existsSync(), true);
    expect(globals.fs.file(globals.fs.path.join('example.d')).existsSync(), false);
  }, overrides: <Type, Generator>{
    FileSystem: () => MemoryFileSystem.test(),
    ProcessManager: () => FakeProcessManager.any(),
  });

  testWithoutContext('writeBundle applies transformations to any assets that have them defined', () async {
    final MemoryFileSystem fileSystem = MemoryFileSystem.test();
    final File asset = fileSystem.file('my-asset.txt')
      ..createSync()
      ..writeAsBytesSync(<int>[1, 2, 3]);
    final Artifacts artifacts = Artifacts.test();

    final FakeProcessManager processManager = FakeProcessManager.list(
        <FakeCommand>[
          FakeCommand(
            command: <Pattern>[
              artifacts.getArtifactPath(Artifact.engineDartBinary),
              'run',
              'increment',
              '--input=/.tmp_rand0/my-asset.txt-transformOutput0.txt',
              '--output=/.tmp_rand0/my-asset.txt-transformOutput1.txt'
            ],
            onRun: (List<String> command) {
              final ArgResults argParseResults = (ArgParser()
                  ..addOption('input', mandatory: true)
                  ..addOption('output', mandatory: true))
                .parse(command);

              final File inputFile = fileSystem.file(argParseResults['input']);
              final File outputFile = fileSystem.file(argParseResults['output']);

              expect(inputFile, exists);
              outputFile
                ..createSync()
                ..writeAsBytesSync(
                  Uint8List.fromList(
                    inputFile.readAsBytesSync().map((int b) => b + 1).toList(),
                  ),
                );
            },
          ),
        ],
      );

    final FakeAssetBundle bundle = FakeAssetBundle()
      ..entries['my-asset.txt'] = AssetBundleEntry(
        DevFSFileContent(asset),
        kind: AssetKind.regular,
        transformers: const <AssetTransformerEntry>[
          AssetTransformerEntry(package: 'increment', args: <String>[]),
        ],
      );

    final Directory bundleDir = fileSystem.directory(
      getAssetBuildDirectory(Config.test(), fileSystem),
    );

    await writeBundle(
      bundleDir,
      bundle.entries,
      targetPlatform: TargetPlatform.tester,
      impellerStatus: ImpellerStatus.platformDefault,
      processManager: processManager,
      fileSystem: fileSystem,
      artifacts: artifacts,
      logger: BufferLogger.test(),
      projectDir: fileSystem.currentDirectory,
      buildMode: BuildMode.debug,
    );

    final File outputAssetFile = fileSystem.file('build/flutter_assets/my-asset.txt');
    expect(outputAssetFile, exists);
    expect(outputAssetFile.readAsBytesSync(), orderedEquals(<int>[2, 3, 4]));
  });

  testUsingContext('Handles build system failure', () {
    expect(
      () => BundleBuilder().build(
        platform: TargetPlatform.ios,
        buildInfo: BuildInfo.debug,
        project: FlutterProject.fromDirectoryTest(globals.fs.currentDirectory),
        mainPath: 'lib/main.dart',
        assetDirPath: 'example',
        depfilePath: 'example.d',
        buildSystem: TestBuildSystem.all(BuildResult(success: false))
      ),
      throwsToolExit()
    );
  }, overrides: <Type, Generator>{
    FileSystem: () => MemoryFileSystem.test(),
    ProcessManager: () => FakeProcessManager.any(),
  });

  testUsingContext('Passes correct defines to build system', () async {
    final FlutterProject project = FlutterProject.fromDirectoryTest(globals.fs.currentDirectory);
    final String mainPath = globals.fs.path.join('lib', 'main.dart');
    const String assetDirPath = 'example';
    const String depfilePath = 'example.d';
    Environment? env;
    final BuildSystem buildSystem = TestBuildSystem.all(
      BuildResult(success: true),
      (Target target, Environment environment) {
        env = environment;
        environment.outputDir.childFile('kernel_blob.bin').createSync(recursive: true);
        environment.outputDir.childFile('isolate_snapshot_data').createSync();
        environment.outputDir.childFile('vm_snapshot_data').createSync();
        environment.outputDir.childFile('LICENSE').createSync(recursive: true);
      }
    );

    await BundleBuilder().build(
      platform: TargetPlatform.ios,
      buildInfo: const BuildInfo(
        BuildMode.debug,
        null,
        trackWidgetCreation: true,
        frontendServerStarterPath: 'path/to/frontend_server_starter.dart',
        extraFrontEndOptions: <String>['test1', 'test2'],
        extraGenSnapshotOptions: <String>['test3', 'test4'],
        fileSystemRoots: <String>['test5', 'test6'],
        fileSystemScheme: 'test7',
        dartDefines: <String>['test8', 'test9'],
        treeShakeIcons: true,
      ),
      project: project,
      mainPath: mainPath,
      assetDirPath: assetDirPath,
      depfilePath: depfilePath,
      buildSystem: buildSystem
    );

    expect(env, isNotNull);
    expect(env!.defines[kBuildMode], 'debug');
    expect(env!.defines[kTargetPlatform], 'ios');
    expect(env!.defines[kTargetFile], mainPath);
    expect(env!.defines[kTrackWidgetCreation], 'true');
    expect(env!.defines[kFrontendServerStarterPath], 'path/to/frontend_server_starter.dart');
    expect(env!.defines[kExtraFrontEndOptions], 'test1,test2');
    expect(env!.defines[kExtraGenSnapshotOptions], 'test3,test4');
    expect(env!.defines[kFileSystemRoots], 'test5,test6');
    expect(env!.defines[kFileSystemScheme], 'test7');
    expect(env!.defines[kDartDefines], encodeDartDefines(<String>['test8', 'test9']));
    expect(env!.defines[kIconTreeShakerFlag], 'true');
    expect(env!.defines[kDeferredComponents], 'false');
  }, overrides: <Type, Generator>{
    FileSystem: () => MemoryFileSystem.test(),
    ProcessManager: () => FakeProcessManager.any(),
  });

  testWithoutContext('--enable-experiment is removed from getDefaultCachedKernelPath hash', () {
    final FileSystem fileSystem = MemoryFileSystem.test();
    final Config config = Config.test();

    expect(getDefaultCachedKernelPath(
      trackWidgetCreation: true,
      dartDefines: <String>[],
      extraFrontEndOptions: <String>['--enable-experiment=foo'],
      fileSystem: fileSystem,
      config: config,
    ), 'build/cache.dill.track.dill');

    expect(getDefaultCachedKernelPath(
      trackWidgetCreation: true,
      dartDefines: <String>['foo=bar'],
      extraFrontEndOptions: <String>['--enable-experiment=foo'],
      fileSystem: fileSystem,
      config: config,
    ), 'build/06ad47d8e64bd28de537b62ff85357c4.cache.dill.track.dill');

    expect(getDefaultCachedKernelPath(
      trackWidgetCreation: false,
      dartDefines: <String>[],
      extraFrontEndOptions: <String>['--enable-experiment=foo'],
      fileSystem: fileSystem,
      config: config,
    ), 'build/cache.dill');

    expect(getDefaultCachedKernelPath(
      trackWidgetCreation: true,
      dartDefines: <String>[],
      extraFrontEndOptions: <String>['--enable-experiment=foo', '--foo=bar'],
      fileSystem: fileSystem,
      config: config,
    ), 'build/95b595cca01caa5f0ca0a690339dd7f6.cache.dill.track.dill');
  });
}

class FakeAssetBundle extends Fake implements AssetBundle {
  @override
  final Map<String, AssetBundleEntry> entries = <String, AssetBundleEntry>{};
}