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

///https://blog.csdn.net/zcylyzhi4/article/details/108002879
///1、导入相关包
import 'dart:isolate';
import 'dart:ui';

import 'package:flutter/material.dart';
import 'package:flutter_downloader/flutter_downloader.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:hyzp_ybqx02_xingwen/components/dioFun.dart';
import 'package:open_file/open_file.dart';
import 'package:package_info/package_info.dart';
import 'package:path_provider/path_provider.dart';
import 'package:progress_dialog/progress_dialog.dart';

import '../../../components/commonFun.dart';
import '../../../widget/JdButton.dart';

///版本更新頁面
class MyUpdated extends StatefulWidget {
  MyUpdated({Key key, this.ver, this.date, this.theContext}) : super(key: key);
  String ver = '1.0.0';
  String date = '';
  BuildContext theContext;

  _MyUpdatedState createState() => _MyUpdatedState();
}

class _MyUpdatedState extends State<MyUpdated> {
  //2、声明变量
  int _stampAppCompile = -1;
  String _dateNewver = '';
  Map _mapVer = {};
  String serviceVersionCode = '';
  String appId = '';
  ProgressDialog pr;
  String apkName = 'app-release.apk';
  String appPath = '';
  ReceivePort _port = ReceivePort();

  void initState() {
    // 0、初始化FlutterDownLoader。版本更新初始化，放在这里会报错，初始化失败
    // WidgetsFlutterBinding.ensureInitialized();
    if (!bFlutterDownloader_initialize) {
      FlutterDownloader.initialize(debug: true).then((value) {
        //3、在initState中初始化
        IsolateNameServer.registerPortWithName(_port.sendPort, 'downloader_send_port');
        _port.listen(_updateDownLoadInfo);
        FlutterDownloader.registerCallback(_downLoadCallback);
        getNewverUrl().then((value) {
          _mapVer = value;
          print('_mapVer = ${_mapVer}');
        });
        bFlutterDownloader_initialize = true;
      });
    } else {
      //3、在initState中初始化
      IsolateNameServer.registerPortWithName(_port.sendPort, 'downloader_send_port');
      _port.listen(_updateDownLoadInfo);
      FlutterDownloader.registerCallback(_downLoadCallback);
      getNewverUrl().then((value) {
        _mapVer = value;
        print('_mapVer = ${_mapVer}');
        //I/flutter (12498): _mapVer = {id: 1, ver: 1.0.0, miaos: 版本说明,
        // downurl: http://www.sctastech.com/download/hyzp_20210425.apk, updatetime: 1620632231}

        print('oldVer = ${widget.ver}');
        _mapVer['ver'] = '1.3.1';
        print('newVer = ${_mapVer['ver']}');
        // I/flutter ( 1872): oldVer = 1.3.0
        // I/flutter ( 1872): newVer = 1.3.1

        ///从字符串时间获取秒时间戳：int getStampFromString(String strTime)
        // _stampAppCompile = getStampFromString(widget.date.replaceAll('.', '-'));
        // //timeStamp可以是int类型或String类型的时间戳（秒）：String getFtpdir_YYYYMMDD(var timeStamp)
        // _dateNewver = getFtpdir_YYYYMMDD(_mapVer['updatetime'], sep: '.');
        // print('_stampAppCompile = $_stampAppCompile');
        // print('_mapVer[\'updatetime\'] = ${_mapVer['updatetime']}');
        // print('widget.date = ${widget.date}');
        // print('_dateNewver = $_dateNewver');
        // I/flutter (30820): _stampAppCompile = 1620403200
        // I/flutter (30820): _mapVer['updatetime'] = 1620632231
        // I/flutter (30820): widget.date = 2021.05.08
        // I/flutter (30820): _dateNewver = 2021.05.10
      });
    }

    super.initState();
  }

  //4、判断，自动更新

  // 版本比较
  Future verCompare({String newVer, String oldVer}) async {
    List listNewVer = await tran2int(newVer.split('.'));
    List listOldVer = await tran2int(oldVer.split('.'));

    int len = listNewVer.length;
    for (int i = 0; i < len; i++) {
      if (listNewVer[i] > listOldVer[i]) {
        return true;
      }
    }
    return false;
  }

  Future tran2int(List _list) async {
    List listRet = [];
    int len = _list.length;
    for (int i = 0; i < len; i++) {
      listRet.add(int.parse(_list[i].trim()));
    }
    return listRet;
  }

  @override
  Future afterFirstLayout(BuildContext context) async {
    // 如果是android，则执行热更新
    if (Platform.isAndroid) {
      verCompare(newVer: _mapVer['ver'], oldVer: widget.ver).then((value) {
        if (value) {
          print('value = $value');
          //_getNewVersionAPP(context);
          serviceVersionCode = _mapVer['ver'];
          //appId = res.data['id'];
          //_checkVersionCode();
          _showNewVersionAppDialog();
        }
      });
    }
  }

  //监听登录页面销毁的事件
  dispose() {
    super.dispose();
  }

  doLogin() async {
    //临时跳转
    //Navigator.pushNamed(context, '/tabs', arguments: g_iIndex);
    afterFirstLayout(context).then((value) {});
    //Navigator.pop(context); //返回
    return;
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: PreferredSize(
        preferredSize: Size.fromHeight(ScreenUtil().setHeight(173)),
        // 设置appBar高度
        // 设置appBar高度
        child: AppBar(
          automaticallyImplyLeading: false,
          centerTitle: true,
          titleSpacing: 0.0,
          //设置title的左边距
          flexibleSpace: Container(
            //SizedBox(height: ScreenUtil().statusBarHeight), //显示顶部状态栏
            // SizedBox(height: ScreenUtil().setHeight(10)), //显示顶部状态栏
            padding: EdgeInsets.only(top: ScreenUtil().statusBarHeight),
            //留出顶部状态栏高度
            child: Container(
              //height: ScreenUtil().setHeight(173),
              decoration: BoxDecoration(
                gradient: LinearGradient(
                  begin: Alignment.centerLeft,
                  end: Alignment.centerRight,
                  colors: [
                    Color.fromRGBO(12, 186, 156, 1),
                    Color.fromRGBO(39, 127, 235, 1),
                  ],
                ),
              ),
              // decoration: BoxDecoration(
              //   gradient: LinearGradient(colors: [
              //     Color(0xFF0018EB),
              //     Color(0xFF01C1D9),
              //   ], begin: Alignment.bottomCenter, end: Alignment.topCenter),
              // ),
            ),
          ),
          title: Padding(
            padding: EdgeInsets.only(left: 0, right: 0),
            child: Row(
              mainAxisAlignment: MainAxisAlignment.start,
              children: [
                getIconAndTextButton(
                  iconColor: Colors.white,
                  iconData: Icons.chevron_left_outlined,
                  onPress: () {
                    Navigator.pop(context);
                  },
                ),
                Expanded(
                  child: Text("版本更新",
                      style: TextStyle(color: Colors.white, fontSize: 20),
                      textAlign: TextAlign.center,
                      overflow: TextOverflow.ellipsis),
                ),
                SizedBox(width: 50),
              ],
            ),
          ),
        ),
      ),
      body: Container(
        padding: EdgeInsets.only(top: 20, bottom: 20, left: 5, right: 5),
        child: ListView(
          children: <Widget>[
            Center(
              child: Container(
                margin: EdgeInsets.only(top: 30),
                height: ScreenUtil().setWidth(160),
                width: ScreenUtil().setWidth(160),
                //child: Image.asset('assets/images/user.png', fit: BoxFit.cover),
                child: Image.asset('assets/images/ybsthbj.png', fit: BoxFit.fitHeight),
                // child: Image.network(
                //     'https://www.itying.com/images/flutter/list5.jpg',
                //     fit: BoxFit.cover),
              ),
            ),
            Center(
              child: Column(
                mainAxisAlignment: MainAxisAlignment.center,
                children: <Widget>[
                  SizedBox(height: 60),
                  // Text('宜宾市翠屏黑烟车电子抓拍系统', style: TextStyle(fontSize: 20)),
                  Text(yibin_QuXian + '黑烟车电子抓拍系统', style: TextStyle(fontSize: 20)),
                  Text('v${widget.ver}（${widget.date}）', style: TextStyle(fontSize: 20)),
                  SizedBox(height: 60),
                  //Text('© 宜宾市翠屏生态环境局  版权所有',
                  Text(copyright_info,
                      maxLines: 2, style: TextStyle(fontSize: 16), textAlign: TextAlign.center),
                  // Text('© 宜宾市翠屏生态环境局  四川省踏石科技  版权所有\n服务热线：187-8467-8300',
                ],
              ),
            ),
            SizedBox(height: 100),
            Container(
              padding: EdgeInsets.only(top: 20, bottom: 20, left: 20, right: 20),
              child: JdButton(
                height: 126,
                text: "确认",
                color: Colors.blueAccent,
                onTop: doLogin,
              ),
            ),
          ],
        ),
      ),
    );
  }

  ///https://blog.csdn.net/zcylyzhi4/article/details/108002879
  //5、自动更新代码
  /// 执行版本更新的网络请求
  _getNewVersionAPP(context) async {
    // HttpUtils.send(
    //   context,
    //   'http://update.rwworks.com:8088/appManager/monitor/app/version/check/flutterTempldate',
    // ).then((res) {
    //   serviceVersionCode = res.data["versionNo"];
    //   appId = res.data['id'];
    //   _checkVersionCode();
    // });
  }

  /// 检查当前版本是否为最新，若不是，则更新
  void _checkVersionCode() {
    PackageInfo.fromPlatform().then((PackageInfo packageInfo) {
      var currentVersionCode = packageInfo.version;
      if (double.parse(serviceVersionCode.substring(0, 3)) >
          double.parse(currentVersionCode.substring(0, 3))) {
        _showNewVersionAppDialog();
      }
    });
  }

  /// 版本更新提示对话框
  Future<void> _showNewVersionAppDialog() async {
    return showDialog<void>(
        context: context,
        barrierDismissible: false,
        builder: (BuildContext context) {
          return AlertDialog(
            title: new Row(
              children: <Widget>[
                new Padding(
                    padding: const EdgeInsets.fromLTRB(30.0, 0.0, 10.0, 0.0),
                    child: new Text("发现新版本"))
              ],
            ),
            content: new Text(serviceVersionCode),
            actions: <Widget>[
              new FlatButton(
                child: new Text('下次再说'),
                onPressed: () {
                  Navigator.of(context).pop();
                },
              ),
              new FlatButton(
                child: new Text('立即更新'),
                onPressed: () {
                  _doUpdate(context);
                },
              )
            ],
          );
        });
  }

  /// 执行更新操作
  _doUpdate(BuildContext context) async {
    Navigator.pop(context);
    _executeDownload(context);
  }

  /// 下载最新apk包
  Future<void> _executeDownload(BuildContext context) async {
    pr = new ProgressDialog(
      context,
      type: ProgressDialogType.Download,
      isDismissible: true,
      showLogs: true,
    );
    pr.style(message: '准备下载...');
    if (!pr.isShowing()) {
      pr.show();
    }

    final path = await _apkLocalPath;
    await FlutterDownloader.enqueue(
        //url: 'http://update.rwworks.com:8088/appManager/monitor/app/appload/' + appId + '',
        url: _mapVer['downurl'],
        savedDir: path,
        fileName: apkName,
        showNotification: true,
        openFileFromNotification: true);
  }

  /// 下载进度回调函数
  static void _downLoadCallback(String id, DownloadTaskStatus status, int progress) {
    final SendPort send = IsolateNameServer.lookupPortByName('downloader_send_port');
    send.send([id, status, progress]);
  }

  /// 更新下载进度框
  _updateDownLoadInfo(dynamic data) {
    DownloadTaskStatus status = data[1];
    int progress = data[2];
    if (status == DownloadTaskStatus.running) {
      pr.update(progress: double.parse(progress.toString()), message: "下载中，请稍后…");
    }
    if (status == DownloadTaskStatus.failed) {
      if (pr.isShowing()) {
        pr.hide();
      }
    }

    if (status == DownloadTaskStatus.complete) {
      if (pr.isShowing()) {
        pr.hide();
      }
      _installApk();
    }
  }

  /// 安装apk
  Future<Null> _installApk() async {
    await OpenFile.open(appPath + '/' + apkName);
  }

  /// 获取apk存储位置
  Future<String> get _apkLocalPath async {
    final directory = await getExternalStorageDirectory();
    String path = directory.path + Platform.pathSeparator + 'Download';
    ;
    final savedDir = Directory(path);
    bool hasExisted = await savedDir.exists();
    if (!hasExisted) {
      await savedDir.create();
    }
    this.setState(() {
      appPath = path;
    });
    return path;
  }
}