import 'dart:io';
import 'dart:math';

import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:install_plugin/install_plugin.dart';
import 'package:one_key/models/version.dart';
import 'package:one_key/net/dio_util.dart';
import 'package:one_key/res/colors.dart';
import 'package:path_provider/path_provider.dart';
import 'package:permission_handler/permission_handler.dart';

class UpdateModel{

  int _progress;//下载进度
  Function _setState;
  //检查更新
  Future<Version> checkUpdate(BuildContext context){
    Future.delayed(new Duration(milliseconds: 1000),(){
      if(Random().nextInt(10)>0){
        Version version=Version.fromJson({
          "version":"v1.0.3",
          "file_url":"http://xt03.colorcun.com/uploads/20191105/67e38355c41528b24a97e9ac71a221ea.apk",
          "content":"1.bug修复;\n2.功能更新;"
        });
        showUpdateDialog(context, version);
      }
    });
  }

  //拒绝订单弹框
  showUpdateDialog(BuildContext context,Version version){
    showDialog(context: context,builder: (context){
      return AlertDialog(
        title: Text("版本更新${version.version}"),
        titleTextStyle: TextStyle(color: MyColours.color_353535,fontSize: ScreenUtil().setSp(32)),
        content: Text("${version.content}"),
        contentTextStyle:TextStyle(color: MyColours.color_828282,fontSize: ScreenUtil().setSp(28)),
        actions: <Widget>[
          FlatButton(
            child: Text("取消",style: TextStyle(fontSize: ScreenUtil().setSp(32)),),
            onPressed: (){
              Navigator.of(context).pop();
            },
          ),
          FlatButton(
            child: Text("去更新",style: TextStyle(fontSize: ScreenUtil().setSp(32)),),
            onPressed: () async {
              Navigator.of(context).pop();
              if(Platform.isAndroid){
                downloadApk(context,version.file_url);
              }else{
                InstallPlugin.gotoAppStore("itms-apps://itunes.apple.com/WebObjects/MZStore.woa/wa/viewSoftware?id=1510697490");
              }
            },
          )
        ],
      );
    });
  }

  //下载更新版本
  Future<void> downloadApk(BuildContext context,String file_url) async {
    Map<PermissionGroup, PermissionStatus> permissions =
    await PermissionHandler().requestPermissions([PermissionGroup.storage]);
    if(permissions[PermissionGroup.storage] == PermissionStatus.granted){
      final dir=await getExternalStorageDirectory();
      String savePath=dir.path+"/one_key";
      DioUtil().download(file_url, savePath,onProgress: (received,total){
        int progress=((received/total)*100).round();
        _progress=progress;
        _setState((){});
        if(received==total){//下载完成
          InstallPlugin.installApk(savePath,"com.naji.one_key");
        }
      });
    }
  }

  //显示下载进度条
  Function showDownloadProgress(BuildContext context){
    showDialog(
        context: context,
        barrierDismissible: false,
        builder: (context) {
          return AlertDialog(
              content: StatefulBuilder(builder: (context, setState) {
                if(_progress==100){
                  Navigator.of(context).pop();

                }
                _setState=setState;
                return Column(
                  mainAxisSize: MainAxisSize.min,
                  children: <Widget>[
                    CircularProgressIndicator(),
                    Padding(
                      padding: EdgeInsets.only(top: 26),
                      child: Text("正在下载...${_progress}%"),
                    )
                  ],
                );
              }));
        });
    return _setState;
  }
}