// Copyright 2013 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 = 2.6
import 'dart:convert';

import 'utils.dart';

class MacOSInfo {
  /// Print information collected from the operating system.
  ///
  /// Built in tools such as `system_profiler` and `defaults` are utilized.
  Future<void> printInformation() async {
    try {
      await _printSafariApplications();
    } catch (error) {
      print('Error thrown while getting Safari Applications: $error');
    }

    try {
      await _printSafariDefaults();
    } catch (error) {
      print('Error thrown while getting Safari defaults: $error');
    }

    try {
      await _printUserLimits();
    } catch (error) {
      print('Error thrown while getting user limits defaults: $error');
    }
  }

  /// Print information on applications in the system that contains string
  /// `Safari`.
  Future<void> _printSafariApplications() async {
    final String systemProfileJson = await evalProcess(
        'system_profiler', ['SPApplicationsDataType', '-json']);

    final Map<String, dynamic> json =
        jsonDecode(systemProfileJson) as Map<String, dynamic>;
    final List<dynamic> systemProfile = json.values.first as List<dynamic>;
    for (int i = 0; i < systemProfile.length; i++) {
      final Map<String, dynamic> application =
          systemProfile[i] as Map<String, dynamic>;
      final String applicationName = application['_name'] as String;
      if (applicationName.contains('Safari')) {
        print('application: $applicationName '
            'fullInfo: ${application.toString()}');
      }
    }
  }

  /// Print all the defaults in the system related to Safari.
  Future<void> _printSafariDefaults() async {
    final String defaults =
        await evalProcess('/usr/bin/defaults', ['find', 'Safari']);

    print('Safari related defaults:\n $defaults');
  }

  /// Print user limits (file and process).
  Future<void> _printUserLimits() async {
    final String fileLimit = await evalProcess('ulimit', ['-n']);

    print('MacOS file limit: $fileLimit');

    final String processLimit = await evalProcess('ulimit', ['-u']);

    print('MacOS process limit: $processLimit');
  }
}