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

import 'package:dio/dio.dart';
import 'package:dio_cache_interceptor/dio_cache_interceptor.dart';
import 'package:flutter/material.dart';
import 'package:flutter_reactive_ble/flutter_reactive_ble.dart';
import 'package:get_it/get_it.dart';
import 'package:nordic_dfu/nordic_dfu.dart';
import 'package:path_provider/path_provider.dart';
import 'package:sport/bean/hardware.dart';
import 'package:sport/provider/bluetooth.dart';
import 'package:sport/services/app_subscription_state.dart';
import 'package:sport/utils/toast.dart';
import 'package:sport/widgets/button_primary.dart';
import 'package:umeng_common_sdk/umeng_common_sdk.dart';
import 'package:wakelock/wakelock.dart';

class DfuUpdatePage extends StatefulWidget {
  final Hardware hardware;
  final String version;

  const DfuUpdatePage({Key? key, required this.hardware,required this.version}) : super(key: key);

  @override
  State<StatefulWidget> createState() => _PateState();
}

class _PateState extends State<DfuUpdatePage> with SubscriptionState{
  ValueNotifier<String> _msg = ValueNotifier<String>("请稍候...");
  ValueNotifier<bool> _close = ValueNotifier<bool>(false);
  ValueNotifier<String> _title = ValueNotifier<String>("升级设备");
  StreamSubscription? scanSubscription;
  double _progress = .0;
  bool _error = false;

  late Bluetooth bluetooth;

  @override
  void initState() {
    super.initState();
    bluetooth = GetIt.I<Bluetooth>();

    final context = this.context;
    final deviceId = bluetooth.deviceId;

    if (deviceId == null) {
      ToastUtil.show("请先连接鞋子！！");
      Navigator.of(context).pop();
      return;
    }
    if (bluetooth.electricityNotifier.value < 10) {
      ToastUtil.showBottom("鞋子电量不足，请确保电量10%以上！");
      Navigator.of(context).pop();
      return;
    }

    Wakelock.enable();

    _update(deviceId).then((value) async {
      bluetooth.addErr("0", "DFU升级成功", "${widget.version}");
      _msg.value = "正在重启鞋子...";
    }).catchError((error){
      bluetooth.addErr("100", "DFU升级失败", "$error");
      print("bluetooth -- dfu -- error $error");
      _msg.value = "升级失败！！";
    }).whenComplete(() async {
      if (!_error) {
        ToastUtil.show("升级成功");
      }else{
        ToastUtil.show("升级失败！！");
      }
      setState(() {
        _error = false;
      });
      bluetooth.dfu = false;
      if(!bluetooth.isConnected) {
        bluetooth.connectDevice(id: deviceId);
      }

      Navigator.of(context).pop(true);
      await Future.delayed(Duration(seconds: 15));
      _close.value = true;
    });

    UmengCommonSdk.onEvent("shoe_dfu", {});
  }

  @override
  void dispose() {
    bluetooth.dfu = false;
    Wakelock.disable();
    super.dispose();
    scanSubscription?.cancel();
  }

  Future<String?> _update(String deviceId) async {
    List<String> list = widget.hardware.devices ?? [];
    _msg.value = "下载固件...";
    var file = await _download(widget.hardware.file!);
    if (file == null) {
      ToastUtil.show("下载固件失败！！");
      Navigator.of(context).pop();
      return null;
    }
    print("bluetooth -- dfu -- $list");
    print("bluetooth -- dfu -- start device $deviceId");

    bluetooth.dfu = true;

    for (var i = 0; i < list.length; i++) {
      String mac = list[i];
      int type = list.length - i - 1;
      _title.value = "升级设备(${i + 1}/${list.length})";
      print("bluetooth -- dfu -- file $file");
      try {
        _msg.value = "正在连接设备($mac)...";

        if (i == 0) {
          bool setup = false;
          _msg.value = "正在断开右鞋连接...";
          for (var i = 0; i < 2; i++) {
            print("bluetooth -- dfu setupDeviceVer start $i");
            setup = await bluetooth.setupDeviceVer(type);
            if (setup == true) {
              _msg.value = "已断开右鞋连接...";
              break;
            }
          }
          if (setup != true) {
            throw TimeoutException("发送指令超时");
          }

          String name = "${mac.replaceAll(":", "").toUpperCase()}";
          _msg.value = "开始搜索$name";

          if (Platform.isIOS) {
            DiscoveredDevice? device = await bluetooth.discoverDevice(deviceName: name);
            if (device == null) {
              _msg.value = "搜索超时";
              throw TimeoutException("搜索超时$name");
            }
            await bluetooth.disconnectDevice("dfu升级", clearGatt: true);
            await doDfu(device.id, file, i);
          } else {
            await bluetooth.disconnectDevice("dfu升级", clearGatt: true);
            await doDfu(mac, file, i);
          }
        } else {
          await doDfu(deviceId, file, i);
        }
      } catch (e) {
        print(e);
        _msg.value = "升级失败: ${e.toString()}";
        Future.delayed(Duration(seconds: 3)).then((value) => _close.value = true);
        throw e;
      }
    }
    return deviceId;
  }

  Future<String?> _download(String url) async {
    Directory dir = await getTemporaryDirectory();
    File file = File("${dir.path}/${url.hashCode}.zip");
    if (!await file.exists()) {
      file.createSync();
    }
    for (var i = 0; i < 3; i++) {
      try {
        var resp = await GetIt.I<Dio>().download(url, file.path, deleteOnError: true, onReceiveProgress: (index, total) => _msg.value = "下载中 (${index ~/ total * 100}%)...", options: CacheOptions(store: null, policy: CachePolicy.noCache).toOptions());
        if (resp.data != null) return file.path;
      } catch (e) {
        print(e);
      }
    }
    return null;
  }

  Future<String?> doDfu(String deviceId, String filePath, int index) async {
    _msg.value = "正在准备升级服务...";
    await Future.delayed(Duration(seconds: 3));
    // String label = index == 0 ? "右鞋" : "左鞋";
    return await NordicDfu().startDfu(
      deviceId,
      filePath,
      fileInAsset: false,
      onEnablingDfuMode: (deviceAddress) {
        _msg.value = "准备升级($deviceAddress)...";
      },
      onDfuProcessStarted: (deviceAddress) {
        _msg.value = "准备升级($deviceAddress)...";
      },
      onDfuProcessStarting: (deviceAddress) {
        _msg.value = "准备升级($deviceAddress)...";
      },
      onDeviceConnecting: (deviceAddress) {
        _msg.value = "准备升级($deviceAddress)...";
      },
      onDeviceConnected: (deviceAddress) {
        _msg.value = "准备升级($deviceAddress)";
      },
      onDfuCompleted: (deviceAddress) {
        _msg.value = "升级完成($deviceAddress)";
      },
      onFirmwareValidating: (deviceAddress) {
        _msg.value = "正在校验($deviceAddress)...";
      },
      onProgressChanged: (
        deviceAddress,
        percent,
        speed,
        avgSpeed,
        currentPart,
        partsTotal,
      ) {
        print('deviceAddress: $deviceAddress, percent: $percent');
        double progress = (percent / 200) + index * .5;
        setState(() {
          _progress = progress;
        });
        _msg.value = "升级中 (${(progress * 100).toInt()}%)...";
      },
      onError: (
        String? deviceAddress,
        int? error,
        int? errorType,
        String? message,
      ) {
        throw Exception("$deviceAddress, $error $errorType, $message");
      },
    );
  }

  @override
  Widget build(BuildContext context) {
    return WillPopScope(
      onWillPop: () async {
        return _error;
      },
      child: Padding(
        padding: const EdgeInsets.all(12.0),
        child: Column(
          children: <Widget>[
            ValueListenableBuilder(
                valueListenable: _title,
                builder: (BuildContext context, String value, Widget? child) => Text(
                      value,
                      style: Theme.of(context).textTheme.headline3,
                    )),
            Padding(
              padding: const EdgeInsets.fromLTRB(15.0, 40.0, 15.0, 15.0),
              child: SizedBox(
                  height: 5,
                  child: LinearProgressIndicator(
                    value: _progress <= 0 ? null : _progress,
                    backgroundColor: const Color(0xfff1f1f1),
                  )),
            ),
            ValueListenableBuilder(
                valueListenable: _msg,
                builder: (BuildContext context, String value, Widget? child) => Text(
                      value,
                      style: Theme.of(context).textTheme.bodyText1,
                    )),
            ValueListenableBuilder(
                valueListenable: _close,
                builder: (BuildContext context, bool value, Widget? child) => value
                    ? Container(
                        width: 140,
                        margin: EdgeInsets.only(top: 12.0),
                        child: PrimaryButton(
                            callback: () {
                              Navigator.pop(context, false);
                            },
                            content: "关闭"),
                      )
                    : Container())
          ],
        ),
      ),
    );
  }
}