// Copyright 2020 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:io';

import 'package:args/args.dart';

import 'package:device_doctor/device_doctor.dart';

const String actionFlag = 'action';
const String deviceOSFlag = 'device-os';
const String helpFlag = 'help';
const String outputFlag = 'output';
const List<String> supportedOptions = <String>['healthcheck', 'prepare', 'recovery', 'properties'];
const List<String> supportedDeviceOS = <String>['ios', 'android'];
const String defaultOutputPath = '.output';

/// These values will be initialized in `_checkArgs` function,
/// and used in `main` function.
String? _action;
String? _deviceOS;
File? _output;

/// Manage `healthcheck`, `prepare, `recovery`, and `properties` for devices.
///
/// For `healthcheck`, if no device is found or any health check fails an stderr will be logged,
/// and an exception will be thrown.
///
/// For `recovery`, it will do cleanup, reboot, etc. to try bringing device back to a working state.
///
/// For `prepare`, it will prepare the device before running tasks, like kill running processes, etc.
///
/// For `properties`, it will return device properties/dimensions, like manufacture, base_buildid, etc.
///
/// Usage:
/// dart main.dart --action <healthcheck|recovery> --deviceOS <android|ios>
Future<void> main(List<String> args) async {
  final ArgParser parser = ArgParser();
  parser
    ..addFlag('$helpFlag', help: 'Prints usage info.', abbr: 'h', callback: (bool value) {
      if (value) {
        stdout.write('${parser.usage}\n');
        exit(1);
      }
    })
    ..addOption('$actionFlag', help: 'Supported actions.', allowed: supportedOptions, allowedHelp: {
      'healthcheck': 'Check device health status.',
      'recovery': 'Clean up and reboot device.',
      'properties': 'Return device properties/dimensions.'
    })
    ..addOption('$outputFlag', help: 'Path to the output file')
    ..addOption('$deviceOSFlag',
        help: 'Supported device OS.',
        allowed: supportedDeviceOS,
        allowedHelp: {'android': 'Available for linux, mac, and windows.', 'ios': 'Available for mac.'});

  final ArgResults argResults = parser.parse(args);
  _action = argResults[actionFlag];
  _deviceOS = argResults[deviceOSFlag];
  _output = File(argResults[outputFlag] ?? defaultOutputPath);

  final DeviceDiscovery deviceDiscovery = DeviceDiscovery(_deviceOS, _output);

  switch (_action) {
    case 'healthcheck':
      await deviceDiscovery.checkDevices();
      break;
    case 'prepare':
      await deviceDiscovery.prepareDevices();
      break;
    case 'recovery':
      await deviceDiscovery.recoverDevices();
      break;
    case 'properties':
      await deviceDiscovery.deviceProperties();
  }
}