import 'dart:io';

import 'package:flutter/material.dart';
import 'package:flutter/cupertino.dart';
import 'package:path_provider/path_provider.dart';
import 'package:ysairplane/base/YSBase.dart';
import 'package:ysairplane/code/YSChangePayPass.dart';
import 'package:ysairplane/code/YSLogin.dart';
import 'package:ysairplane/code/YSSetPayPass.dart';
import 'package:ysairplane/tools/YSNetWorking.dart';
import 'package:ysairplane/tools/YSTools.dart';
import 'package:shared_preferences/shared_preferences.dart';

class YSSetting extends StatefulWidget {
  @override
  _YSSettingState createState() => _YSSettingState();
}

class _YSSettingState extends State<YSSetting> {
  String cacheSizeStr = '0.0B';
  bool _isOpen = false;
  @override
  void initState() {
    Future.delayed(Duration(seconds: 0)).then((value){
      loadCache();
    });
    super.initState();
  }
  @override
  Widget build(BuildContext context) {
    return YSBase(
      ystitle: '系统设置',
      yschild: Container(
        height: MediaQuery.of(context).size.height-MediaQuery.of(context).padding.top-44,
        width: MediaQuery.of(context).size.width,
        color: Color(0xFFF5F6F8),
        child: Column(
          children: [
            Container(
              margin: EdgeInsets.only(top: 10,bottom: 0.5),
              padding: EdgeInsets.only(left: 15,right: 15),
              height: 50,
              color: Colors.white,
              child: Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: [
                  Text('消息通知',style: TextStyle(fontSize: 16,color: Color(0xFF000000)),),
                  GestureDetector(
                    onTap: (){
                      setState(() {
                        _isOpen = !_isOpen;
                      });
                    },
                    child: Container(
                      height: hsp(60),
                      width: hsp(100),
                      child: Image.asset(_isOpen==false?'lib/images/kaiguankai.png':'lib/images/kaiguanguan.png'),
                    ),
                  )
                ],
              ),
            ),
            GestureDetector(
              onTap: (){
                showDialog(
                    context:context,
                    builder:(context){
                      return AlertDialog(
                        title: Text('提示',style: TextStyle(fontSize: 16,color: Color(0xFF292929),decoration: TextDecoration.none,fontWeight: FontWeight.normal),),
                        content: Text('确认清除缓存？',style: TextStyle(fontSize: 13,color: Color(0xFF292929),decoration: TextDecoration.none,fontWeight: FontWeight.normal),),
                        actions: [
                          CupertinoButton(
                            padding: EdgeInsets.all(0),
                            child: Text('取消',style: TextStyle(fontSize: 13,color: Color(0xFF292929),decoration: TextDecoration.none,fontWeight: FontWeight.normal),),
                            onPressed: (){
                              Navigator.pop(context);
                            },
                          ),
                          CupertinoButton(
                            padding: EdgeInsets.all(0),
                            child: Text('确认',style: TextStyle(fontSize: 13,color: Color(0xFF292929),decoration: TextDecoration.none,fontWeight: FontWeight.normal),),
                            onPressed: (){
                              Navigator.pop(context);
                              _clearCache();
                            },
                          ),
                        ],
                      );
                    }
                );
              },
              child: Container(
                padding: EdgeInsets.only(left: 15,right: 15),
                height: 50,
                color: Colors.white,
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
                  children: [
                    Text('清理缓存',style: TextStyle(fontSize: 16,color: Color(0xFF000000)),),
                    Row(
                      children: [
                        Text(cacheSizeStr!=null?cacheSizeStr:'',style: TextStyle(color: Color(0xFF9A9A9A),fontSize: 16),),
                        Icon(Icons.keyboard_arrow_right,size: 20,color: Color(0xFF9A9A9A),)
                      ],
                    )
                  ],
                ),
              ),
            ),
            ListView.separated(
              itemBuilder: (context,index){
                return GestureDetector(
                  onTap: (){
                    Navigator.of(context).push(
                      CupertinoPageRoute(
                        builder: (context){
                          return index==0?YSSetPayPass():YSChangeOldPayPass();
                        }
                      )
                    );
                  },
                  child: Container(
                    padding: EdgeInsets.only(left: 15,right: 15),
                    height: 50,
                    color: Colors.white,
                    child: Row(
                      mainAxisAlignment: MainAxisAlignment.spaceBetween,
                      children: [
                        Text(index==0?'设置支付密码':'修改支付密码',style: TextStyle(fontSize: 16,color: Color(0xFF000000)),),
                        Icon(Icons.keyboard_arrow_right,size: 20,color: Color(0xFF9A9A9A),)
                      ],
                    ),
                  ),
                );
              },
              separatorBuilder: (context,index){
                return Divider(color: Color(0xFFF5F6F8),height: 0.5,thickness: 0.5,);
              },
              itemCount: 2,
              padding: EdgeInsets.only(top: hsp(20)),
              shrinkWrap: true,
              physics: NeverScrollableScrollPhysics(),
            ),
            GestureDetector(
              child: Container(
                margin: EdgeInsets.only(top: 35),
                height: 45,
                width: MediaQuery.of(context).size.width-40,
                alignment: Alignment.center,
                decoration: BoxDecoration(
                  color: Color(0xFF007AFF),
                  borderRadius: BorderRadius.all(Radius.circular(6))
                ),
                child: Text('退出当前账号',style: TextStyle(fontSize: 17,color: Colors.white,fontWeight: FontWeight.bold),),
              ),
              onTap: (){
                Navigator.of(context).pushAndRemoveUntil(
                  CupertinoPageRoute(
                    builder: (context){
                      Future<SharedPreferences> _prefer = SharedPreferences.getInstance();
                      _prefer.then((value){
                        value.remove('token');
                      });
                      return YSLogin(isOut: true,);
                    }
                ), (route) => false);

              },
            )
          ],
        ),
      ),
    );
  }
  void _clearCache() async {
    Directory tempDir = await getTemporaryDirectory();
    //删除缓存目录
    await delDir(tempDir);
    await loadCache();
    ysFlutterToast(context, '清除缓存成功');
  }
  Future<Null> delDir(FileSystemEntity file) async {
    if (file is Directory) {
      final List<FileSystemEntity> children = file.listSync();
      for (final FileSystemEntity child in children) {
        var isHave =await child.exists(); //返回真假
        if(isHave){
          await delDir(child);
        }
      }
    }
    await file.delete();
  }
  Future<Null> loadCache() async {
    Directory tempDir = await getTemporaryDirectory();
    double value = await _getTotalSizeOfFilesInDir(tempDir);
    /*tempDir.list(followLinks: false,recursive: true).listen((file){
          //打印每个缓存文件的路径
        print(file.path);
      });*/
    print('临时目录大小: ' + value.toString());
    setState(() {
      cacheSizeStr = _renderSize(value);  // _cacheSizeStr用来存储大小的值
    });
  }
  Future<double> _getTotalSizeOfFilesInDir(final FileSystemEntity file) async {
    if (file is File) {
      int length = await file.length();
      return double.parse(length.toString());
    }
    if (file is Directory) {
      final List<FileSystemEntity> children = file.listSync();
      double total = 0;
      if (children != null)
        for (final FileSystemEntity child in children)
          total += await _getTotalSizeOfFilesInDir(child);
      return total;
    }
    return 0;
  }

  _renderSize(double value) {
    if (null == value) {
      return 0;
    }
    List<String> unitArr = List()
      ..add('B')
      ..add('K')
      ..add('M')
      ..add('G');
    int index = 0;
    while (value > 1024) {
      index++;
      value = value / 1024;
    }
    String size = value.toStringAsFixed(2);
    return size + unitArr[index];
  }
}