import 'dart:async';
import 'dart:io';

import 'package:android_power_manager/android_power_manager.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:fluttertoast/fluttertoast.dart';
import 'package:intl/date_symbol_data_local.dart';

//import 'file_manager.dart';
import 'package:path_provider/path_provider.dart';
import 'package:permission_handler/permission_handler.dart';

import '../main.dart';
import 'common.dart';

//整个Flutter App的入口02
checkPermission() {
  WidgetsFlutterBinding.ensureInitialized();
  initializeDateFormatting("zh_CN", null).then((value) async {
    //整个Flutter App的入口03
    bool ret = await getPermission();
    if (ret) {
      //整个Flutter App的入口04
      getSDCardDir().then((value) {
        //整个Flutter App的入口05
        //runApp(MyApp());
        runApp(MaterialApp(
          //title: '启动图demo',
          debugShowCheckedModeBanner: false,
          theme: new ThemeData(
              brightness: Brightness.light,
              backgroundColor: Colors.white,
              platform: TargetPlatform.android),
          home: new SplashScreen(), //整个Flutter App的入口06
          //整个Flutter App的入口07
          routes: <String, WidgetBuilder>{'/home': (BuildContext context) => MyApp()},
        ));
      });
    } else {
      Fluttertoast.showToast(msg: '用户未授权，程序无法正常运行！', gravity: ToastGravity.CENTER);
      SystemChannels.platform.invokeMethod('SystemNavigator.pop');
    }
  });
}

requestIgnoreBatteryOptimizations() async {
  bool success = await AndroidPowerManager.requestIgnoreBatteryOptimizations();
  if (success) {
    String isIgnoringBatteryOptimizations = await _checkBatteryOptimizations();
    // setState(() {
    //   _isIgnoringBatteryOptimizations = isIgnoringBatteryOptimizations;
    // });
    print("isIgnoringBatteryOptimizations = $isIgnoringBatteryOptimizations");
  }
}

Future<String> _checkBatteryOptimizations() async {
  String isIgnoringBatteryOptimizations;
  // Platform messages may fail, so we use a try/catch PlatformException.
  try {
    isIgnoringBatteryOptimizations =
    '${await AndroidPowerManager.isIgnoringBatteryOptimizations}';
  } on PlatformException {
    isIgnoringBatteryOptimizations = 'Failed to get platform version.';
  }
  return isIgnoringBatteryOptimizations;
}

//整个Flutter App的入口03
// Permission check，适用于 permission_handler: ^5.x.x
Future<bool> getPermission() async {
  if (Platform.isAndroid) {
    await requestIgnoreBatteryOptimizations(); // 请求忽略电池优化

    // You can request multiple permissions at once.
    Map<Permission, PermissionStatus> permissionStatuses = await [
      Permission.storage,
      Permission.camera,
      Permission.microphone,
    ].request();

    if (permissionStatuses[Permission.storage] != PermissionStatus.granted ||
        permissionStatuses[Permission.camera] != PermissionStatus.granted ||
        permissionStatuses[Permission.microphone] != PermissionStatus.granted) {
      return false;
    }
  } else if (Platform.isIOS) {}
  return true;
}

// Permission check，适用于 permission_handler: ^3.3.0
// Future<bool> getPermission() async {
//   List<PermissionGroup> permissionGroupList = [
//     PermissionGroup.storage,
//     PermissionGroup.camera,
//     PermissionGroup.microphone,
//   ];
//   if (Platform.isAndroid) {
//     PermissionStatus permission = await PermissionHandler().checkPermissionStatus(PermissionGroup.storage);
//     if (permission != PermissionStatus.granted) {
//       await PermissionHandler().requestPermissions(permissionGroupList);
//     }
//     permission = await PermissionHandler().checkPermissionStatus(PermissionGroup.storage);
//     if (permission != PermissionStatus.granted) {
//       return false;
//     }
//   } else if (Platform.isIOS) {}
//   return true;
// }

//整个Flutter App的入口04
Future<void> getSDCardDir() async {
  Common().sDCardDir = (await getExternalStorageDirectory()).path;
}