// 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 '../base/context.dart';
import '../base/user_messages.dart';
import '../doctor_validator.dart';
import 'visual_studio.dart';

VisualStudioValidator? get visualStudioValidator => context.get<VisualStudioValidator>();

class VisualStudioValidator extends DoctorValidator {
  VisualStudioValidator({required VisualStudio visualStudio, required UserMessages userMessages})
    : _visualStudio = visualStudio,
      _userMessages = userMessages,
      super('Visual Studio - develop Windows apps');

  final VisualStudio _visualStudio;
  final UserMessages _userMessages;

  @override
  Future<ValidationResult> validateImpl() async {
    final messages = <ValidationMessage>[];
    ValidationType status = ValidationType.missing;
    String? versionInfo;

    if (_visualStudio.isInstalled) {
      status = ValidationType.success;

      messages.add(
        ValidationMessage(
          _userMessages.visualStudioLocation(_visualStudio.installLocation ?? 'unknown'),
        ),
      );

      messages.add(
        ValidationMessage(
          _userMessages.visualStudioVersion(
            _visualStudio.displayName ?? 'unknown',
            _visualStudio.fullVersion ?? 'unknown',
          ),
        ),
      );

      if (_visualStudio.isPrerelease) {
        messages.add(ValidationMessage(_userMessages.visualStudioIsPrerelease));
      }

      final String? windows10SdkVersion = _visualStudio.getWindows10SDKVersion();
      if (windows10SdkVersion != null) {
        messages.add(ValidationMessage(_userMessages.windows10SdkVersion(windows10SdkVersion)));
      }

      // Messages for faulty installations.
      if (!_visualStudio.isAtLeastMinimumVersion) {
        status = ValidationType.partial;
        messages.add(
          ValidationMessage.error(
            _userMessages.visualStudioTooOld(
              _visualStudio.minimumVersionDescription,
              _visualStudio.workloadDescription,
            ),
          ),
        );
      } else if (_visualStudio.isRebootRequired) {
        status = ValidationType.partial;
        messages.add(ValidationMessage.error(_userMessages.visualStudioRebootRequired));
      } else if (!_visualStudio.isComplete) {
        status = ValidationType.partial;
        messages.add(ValidationMessage.error(_userMessages.visualStudioIsIncomplete));
      } else if (!_visualStudio.isLaunchable) {
        status = ValidationType.partial;
        messages.add(ValidationMessage.error(_userMessages.visualStudioNotLaunchable));
      } else if (!_visualStudio.hasNecessaryComponents) {
        status = ValidationType.partial;
        messages.add(
          ValidationMessage.error(
            _userMessages.visualStudioMissingComponents(
              _visualStudio.workloadDescription,
              _visualStudio.necessaryComponentDescriptions(),
            ),
          ),
        );
      } else if (windows10SdkVersion == null) {
        status = ValidationType.partial;
        messages.add(ValidationMessage.hint(_userMessages.windows10SdkNotFound));
      }
      versionInfo = '${_visualStudio.displayName} ${_visualStudio.displayVersion}';
    } else {
      status = ValidationType.missing;
      messages.add(
        ValidationMessage.error(
          _userMessages.visualStudioMissing(_visualStudio.workloadDescription),
        ),
      );
    }

    return ValidationResult(status, messages, statusInfo: versionInfo);
  }
}