// 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.

// @dart = 2.8

import 'package:meta/meta.dart';
import 'package:process/process.dart';

import '../application_package.dart';
import '../base/file_system.dart';
import '../base/logger.dart';
import '../base/os.dart';
import '../build_info.dart';
import '../desktop_device.dart';
import '../device.dart';
import '../features.dart';
import '../project.dart';
import 'application_package.dart';
import 'build_windows.dart';
import 'windows_workflow.dart';

/// A device that represents a desktop Windows target.
class WindowsDevice extends DesktopDevice {
  WindowsDevice({
    @required ProcessManager processManager,
    @required Logger logger,
    @required FileSystem fileSystem,
    @required OperatingSystemUtils operatingSystemUtils,
  }) : super(
      'windows',
      platformType: PlatformType.windows,
      ephemeral: false,
      processManager: processManager,
      logger: logger,
      fileSystem: fileSystem,
      operatingSystemUtils: operatingSystemUtils,
  );

  @override
  bool isSupported() => true;

  @override
  String get name => 'Windows';

  @override
  Future<TargetPlatform> get targetPlatform async => TargetPlatform.windows_x64;

  @override
  bool isSupportedForProject(FlutterProject flutterProject) {
    return flutterProject.windows.existsSync();
  }

  @override
  Future<void> buildForDevice(
    covariant WindowsApp package, {
    String mainPath,
    BuildInfo buildInfo,
  }) async {
    await buildWindows(
      FlutterProject.current().windows,
      buildInfo,
      target: mainPath,
    );
  }

  @override
  String executablePathForDevice(covariant WindowsApp package, BuildMode buildMode) {
    return package.executable(buildMode);
  }
}

// A device that represents a desktop Windows UWP target.
class WindowsUWPDevice extends DesktopDevice {
  WindowsUWPDevice({
    @required ProcessManager processManager,
    @required Logger logger,
    @required FileSystem fileSystem,
    @required OperatingSystemUtils operatingSystemUtils,
  }) : super(
      'windows-uwp',
      platformType: PlatformType.windows,
      ephemeral: false,
      processManager: processManager,
      logger: logger,
      fileSystem: fileSystem,
      operatingSystemUtils: operatingSystemUtils,
  );

  @override
  bool isSupported() => false;

  @override
  String get name => 'Windows (UWP)';

  @override
  Future<TargetPlatform> get targetPlatform async => TargetPlatform.windows_uwp_x64;

  @override
  bool isSupportedForProject(FlutterProject flutterProject) {
    // TODO(flutter): update with detection once FlutterProject knows
    // about the UWP structure.
    return false;
  }

  @override
  Future<void> buildForDevice(
    covariant WindowsApp package, {
    String mainPath,
    BuildInfo buildInfo,
  }) async {
    await buildWindows(
      FlutterProject.current().windows,
      buildInfo,
      target: mainPath,
    );
  }

  @override
  String executablePathForDevice(ApplicationPackage package, BuildMode buildMode) {
    // TODO(flutter): update once application package factory knows about UWP bundle.
    throw UnsupportedError('Windows UWP device not implemented.');
  }
}

class WindowsDevices extends PollingDeviceDiscovery {
  WindowsDevices({
    @required ProcessManager processManager,
    @required Logger logger,
    @required FileSystem fileSystem,
    @required OperatingSystemUtils operatingSystemUtils,
    @required WindowsWorkflow windowsWorkflow,
    @required FeatureFlags featureFlags,
  }) : _fileSystem = fileSystem,
      _logger = logger,
      _processManager = processManager,
      _operatingSystemUtils = operatingSystemUtils,
      _windowsWorkflow = windowsWorkflow,
      _featureFlags = featureFlags,
      super('windows devices');

  final FileSystem _fileSystem;
  final Logger _logger;
  final ProcessManager _processManager;
  final OperatingSystemUtils _operatingSystemUtils;
  final WindowsWorkflow _windowsWorkflow;
  final FeatureFlags _featureFlags;

  @override
  bool get supportsPlatform => _windowsWorkflow.appliesToHostPlatform;

  @override
  bool get canListAnything => _windowsWorkflow.canListDevices;

  @override
  Future<List<Device>> pollingGetDevices({ Duration timeout }) async {
    if (!canListAnything) {
      return const <Device>[];
    }
    return <Device>[
      WindowsDevice(
        fileSystem: _fileSystem,
        logger: _logger,
        processManager: _processManager,
        operatingSystemUtils: _operatingSystemUtils,
      ),
      if (_featureFlags.isWindowsUwpEnabled)
        WindowsUWPDevice(
          fileSystem: _fileSystem,
          logger: _logger,
          processManager: _processManager,
          operatingSystemUtils: _operatingSystemUtils,
        )
    ];
  }

  @override
  Future<List<String>> getDiagnostics() async => const <String>[];
}