// Copyright 2019 The Chromium 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 'package:file/memory.dart';
import 'package:flutter_tools/src/base/file_system.dart';
import 'package:flutter_tools/src/base/platform.dart';
import 'package:flutter_tools/src/build_system/build_system.dart';
import 'package:flutter_tools/src/build_system/targets/windows.dart';
import 'package:flutter_tools/src/cache.dart';
import 'package:mockito/mockito.dart';

import '../../src/common.dart';
import '../../src/testbed.dart';

void main() {
  group('unpack_windows', () {
    Testbed testbed;
    BuildSystem buildSystem;
    Environment environment;
    Platform platform;

    setUpAll(() {
      Cache.disableLocking();
    });

    setUp(() {
      Cache.flutterRoot = '';
      platform = MockPlatform();
      when(platform.isWindows).thenReturn(true);
      when(platform.isMacOS).thenReturn(false);
      when(platform.isLinux).thenReturn(false);
      when(platform.pathSeparator).thenReturn(r'\');
      testbed = Testbed(setup: () {
        environment = Environment(
          projectDir: fs.currentDirectory,
        );
        buildSystem = BuildSystem(<String, Target>{
          unpackWindows.name: unpackWindows,
        });
        fs.file(r'C:\bin\cache\artifacts\engine\windows-x64\flutter_export.h').createSync(recursive: true);
        fs.file(r'C:\bin\cache\artifacts\engine\windows-x64\flutter_messenger.h').createSync();
        fs.file(r'C:\bin\cache\artifacts\engine\windows-x64\flutter_windows.dll').createSync();
        fs.file(r'C:\bin\cache\artifacts\engine\windows-x64\flutter_windows.dll.exp').createSync();
        fs.file(r'C:\bin\cache\artifacts\engine\windows-x64\flutter_windows.dll.lib').createSync();
        fs.file(r'C:\bin\cache\artifacts\engine\windows-x64\flutter_windows.dll.pdb').createSync();
        fs.file(r'C:\bin\cache\artifacts\engine\windows-x64\lutter_export.h').createSync();
        fs.file(r'C:\bin\cache\artifacts\engine\windows-x64\flutter_messenger.h').createSync();
        fs.file(r'C:\bin\cache\artifacts\engine\windows-x64\flutter_plugin_registrar.h').createSync();
        fs.file(r'C:\bin\cache\artifacts\engine\windows-x64\flutter_glfw.h').createSync();
        fs.file(r'C:\bin\cache\artifacts\engine\windows-x64\icudtl.dat').createSync();
        fs.file(r'C:\bin\cache\artifacts\engine\windows-x64\cpp_client_wrapper\foo').createSync(recursive: true);
        fs.directory('windows').createSync();
      }, overrides: <Type, Generator>{
        FileSystem: () => MemoryFileSystem(style: FileSystemStyle.windows),
        Platform: () => platform,
      });
    });

    test('Copies files to correct cache directory', () => testbed.run(() async {
      await buildSystem.build('unpack_windows', environment, const BuildSystemConfig());

      expect(fs.file(r'C:\windows\flutter\flutter_export.h').existsSync(), true);
      expect(fs.file(r'C:\windows\flutter\flutter_messenger.h').existsSync(), true);
      expect(fs.file(r'C:\windows\flutter\flutter_windows.dll').existsSync(), true);
      expect(fs.file(r'C:\windows\flutter\flutter_windows.dll.exp').existsSync(), true);
      expect(fs.file(r'C:\windows\flutter\flutter_windows.dll.lib').existsSync(), true);
      expect(fs.file(r'C:\windows\flutter\flutter_windows.dll.pdb').existsSync(), true);
      expect(fs.file(r'C:\windows\flutter\flutter_export.h').existsSync(), true);
      expect(fs.file(r'C:\windows\flutter\flutter_messenger.h').existsSync(), true);
      expect(fs.file(r'C:\windows\flutter\flutter_plugin_registrar.h').existsSync(), true);
      expect(fs.file(r'C:\windows\flutter\flutter_glfw.h').existsSync(), true);
      expect(fs.file(r'C:\windows\flutter\icudtl.dat').existsSync(), true);
      expect(fs.file(r'C:\windows\flutter\cpp_client_wrapper\foo').existsSync(), true);
    }));

    test('Does not re-copy files unecessarily', () => testbed.run(() async {
      await buildSystem.build('unpack_windows', environment, const BuildSystemConfig());
      final DateTime modified = fs.file(r'C:\windows\flutter\flutter_export.h').statSync().modified;
      await buildSystem.build('unpack_windows', environment, const BuildSystemConfig());

      expect(fs.file(r'C:\windows\flutter\flutter_export.h').statSync().modified, equals(modified));
    }));

    test('Detects changes in input cache files', () => testbed.run(() async {
      await buildSystem.build('unpack_windows', environment, const BuildSystemConfig());
      final DateTime modified = fs.file(r'C:\windows\flutter\flutter_export.h').statSync().modified;
      fs.file(r'C:\bin\cache\artifacts\engine\windows-x64\flutter_export.h').writeAsStringSync('asd'); // modify cache.

      await buildSystem.build('unpack_windows', environment, const BuildSystemConfig());

      expect(fs.file(r'C:\windows\flutter\flutter_export.h').statSync().modified, isNot(modified));
    }));
  });
}

class MockPlatform extends Mock implements Platform {}