import 'dart:ui';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:ysairplane/code/YSLogin.dart';
import 'package:flutter_screenutil/screenutil.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'dart:math' as math;

class YSDatePicker extends StatefulWidget {
  final ValueSetter<String> choose;
  const YSDatePicker({Key key, this.choose}) : super(key: key);
  @override
  _YSDatePickerState createState() => _YSDatePickerState();
}

class _YSDatePickerState extends State<YSDatePicker> {
  String birthday = DateTime.now().year.toString()+'-'+DateTime.now().month.toString().padLeft(2,'0')+'-'+DateTime.now().day.toString().padLeft(2,'0')+' '+
      DateTime.now().hour.toString().padLeft(2,'0')+':'+DateTime.now().minute.toString().padLeft(2,'0');
  @override
  Widget build(BuildContext context) {
    return Container(
      color: Colors.transparent,
      height: 280,
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.end,
        children: [
          Container(
            height: 40,
            padding: EdgeInsets.only(left: wsp(40),right: wsp(40)),
            decoration: BoxDecoration(
              color: Colors.white,
              border: Border(bottom: BorderSide(width: 0.5,color: Color(0xFFEEEEEE)))
            ),
            child: Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                GestureDetector(
                  child: Text('取消',style: TextStyle(fontSize: zsp(30),color: Color(0xFF999999)),),
                  onTap: (){
                    Navigator.pop(context);
                  },
                ),
                GestureDetector(
                  child: Text('确定',style: TextStyle(fontSize: zsp(30),color: Color(0xFF108DE9)),),
                  onTap: (){
                    widget.choose(birthday);
                    Navigator.pop(context);
                  },
                )
              ],
            ),
          ),
          Container(
            height: 240,
            padding: EdgeInsets.all(10),
            decoration: BoxDecoration(
                color: Colors.white,
                borderRadius: BorderRadius.only(topLeft: Radius.circular(20),topRight: Radius.circular(20))
            ),
            child: CupertinoDatePicker(
              initialDateTime: DateTime.now(),
              onDateTimeChanged: (date) {
                birthday = date.year.toString()+'-'+date.month.toString().padLeft(2,'0')+'-'+date.day.toString().padLeft(2,'0')+' '+date.hour.toString().padLeft(2,'0')+':'+date.minute.toString().padLeft(2,'0');
              },
              //mode: CupertinoDatePickerMode.date,
            ),
          ),
        ],
      ),
    );
  }
}

class BottomInputDialog extends StatefulWidget {
  final Widget inputView;
  final double height;
  final Color color;
  const BottomInputDialog({Key key, this.inputView,this.height,this.color}) : super(key: key);
  @override
  _State createState() => _State();
}

class _State extends State<BottomInputDialog> with WidgetsBindingObserver{
  @override
  void initState() {
    WidgetsBinding.instance.addObserver(this);
    super.initState();
  }
  @override
  void didChangeMetrics() {
    WidgetsBinding.instance.addPostFrameCallback((_) {
      if(MediaQuery.of(context).viewInsets.bottom <= 0){
        Navigator.pop(context);
        if (!mounted) {
          return;
        }
        WidgetsBinding.instance.removeObserver(this);
      }
    });
    super.didChangeMetrics();
  }
  @override
  void dispose() {
    super.dispose();
    if (!mounted) {
      return;
    }
    WidgetsBinding.instance.removeObserver(this);
  }
  @override
  Widget build(BuildContext context) {
    return CupertinoPageScaffold(
      backgroundColor: Colors.transparent,
      child: Stack(
        children: <Widget>[
          GestureDetector(
            child: BackdropFilter(
              filter: ImageFilter.blur(sigmaX: 3, sigmaY: 3),
              child: Container(
                height: MediaQuery.of(context).size.height,
                color: widget.color!=null?widget.color:Colors.black12.withOpacity(0.8),
              ),
            ),
            onTap: () {
              Navigator.pop(context);
              if (!mounted) {
                return;
              }
              WidgetsBinding.instance.removeObserver(this);
            },
          ),
          Container(
            margin: EdgeInsets.only(top: MediaQuery.of(context).size.height-widget.height-MediaQuery.of(context).viewInsets.bottom),
            height: widget.height,
            decoration: BoxDecoration(
              color: Colors.white,
              borderRadius: BorderRadius.only(topLeft: Radius.circular(10),topRight: Radius.circular(10)),
              boxShadow: [
                BoxShadow(
                  color: Colors.black12,
                  offset: Offset(-1, -3),
                  blurRadius: 5
                )
              ]
            ),
            padding: EdgeInsets.all(10),
            child: widget.inputView,
          )
        ],
      ),
    );
  }
}

class PopRoute extends PopupRoute{
  final Duration _duration = Duration(milliseconds: 300);
  Widget child;

  PopRoute({@required this.child});

  @override
  Color get barrierColor => null;

  @override
  bool get barrierDismissible => true;

  @override
  String get barrierLabel => null;

  @override
  Widget buildPage(BuildContext context, Animation<double> animation, Animation<double> secondaryAnimation) {
    return child;
  }

  @override
  Duration get transitionDuration => _duration;
}

wsp(int number){
  return ScreenUtil().setWidth(number);
}
hsp(int number){
  return ScreenUtil().setHeight(number);
}
zsp(int number){
  return ScreenUtil().setSp(number,allowFontScalingSelf: false);
}

isLogin(BuildContext context,{VoidCallback login}) async{
  SharedPreferences prefs = await SharedPreferences.getInstance();
  String token = prefs.getString('token');
  if(token==null){
    Navigator.of(context,rootNavigator: true).push(
      CupertinoPageRoute(
        builder: (context){
          return YSLogin();
        }
      )
    ).then((value){
      if(value!=null){
        login();
      }
    });
  }else{
    login();
  }
}

///手机号验证
bool isChinaPhoneLegal(String str) {
  return RegExp(r"^1([38][0-9]|4[579]|5[0-3,5-9]|6[6]|7[0135678]|9[89])\d{8}$").hasMatch(str);
}

///邮箱验证
bool isEmail(String str) {
  return RegExp(r"^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$").hasMatch(str);
}
///验证URL
bool isUrl(String value) {
  return RegExp(r"^((https|http|ftp|rtsp|mms)?:\/\/)[^\s]+").hasMatch(value);
}

///验证身份证
bool isIdCard(String value) {
  return RegExp(r"\d{17}[\d|x]|\d{15}").hasMatch(value);
}

///验证中文
bool isChinese(String value) {
  return RegExp(r"[\u4e00-\u9fa5]").hasMatch(value);
}

class LogUtil {
  static var _separator = "=";
  static var _split =
      "$_separator$_separator$_separator$_separator$_separator$_separator$_separator$_separator$_separator";
  static var _title = "Yl-Log";
  static var _isDebug = true;
  static int _limitLength = 800;
  static String _startLine = "$_split$_title$_split";
  static String _endLine = "$_split$_separator$_separator$_separator$_split";

  static void init({String title, @required bool isDebug,int limitLength}) {
    _title = title;
    _isDebug = isDebug;
    _limitLength = limitLength??=_limitLength;
    _startLine = "$_split$_title$_split";
    var endLineStr = StringBuffer();
    var cnCharReg = RegExp("[\u4e00-\u9fa5]");
    for (int i = 0; i < _startLine.length; i++) {
      if (cnCharReg.stringMatch(_startLine[i]) != null) {
        endLineStr.write(_separator);
      }
      endLineStr.write(_separator);
    }
    _endLine = endLineStr.toString();
  }

  //仅Debug模式可见
  static void d(dynamic obj) {
    if (_isDebug) {
      _log(obj.toString());
    }
  }

  static void v(dynamic obj) {
    _log(obj.toString());
  }

  static void _log(String msg) {
    print("$_startLine");
    _logEmpyLine();
    if(msg.length<_limitLength){
      print(msg);
    }else{
      segmentationLog(msg);
    }
    _logEmpyLine();
    print("$_endLine");
  }

  static void segmentationLog(String msg) {
    var outStr = StringBuffer();
    for (var index = 0; index < msg.length; index++) {
      outStr.write(msg[index]);
      if (index % _limitLength == 0 && index!=0) {
        print(outStr);
        outStr.clear();
        var lastIndex = index+1;
        if(msg.length-lastIndex<_limitLength){
          var remainderStr = msg.substring(lastIndex,msg.length);
          print(remainderStr);
          break;
        }
      }
    }
  }

  static void _logEmpyLine(){
    print("");
  }
}

//indicate
Widget indicateString(String longStr,String str,String otherStr){
  List strings = longStr.split(str);
  print(strings);
  return Container(
    child: RichText(
      text: longStr!=str?TextSpan(
        children:
        [
          for(int i = 0;i<strings.length;i++)TextSpan(
            children: [
              TextSpan(
                text: strings[i]==''?str:strings[i],
                style: TextStyle(fontSize: zsp(32),color: strings[i]==''?Color(0xFF007AFF):Color(0xFF444444)),
              ),
            ]
          ),
          TextSpan(
            text: '       $otherStr',
            style: TextStyle(fontSize: zsp(26),color: Color(0xFF999999)),
          )
        ]
      ):TextSpan(
          children:[
            TextSpan(
              text: longStr,
              style: TextStyle(fontSize: zsp(32),color: Color(0xFF007AFF)),
            ),
            TextSpan(
              text: '       $otherStr',
              style: TextStyle(fontSize: zsp(26),color: Color(0xFF999999)),
            )
          ]
      ),
    ),
  );
}

class ExpandableText extends StatefulWidget {
  final String text;
  final int maxLines;
  final TextStyle style;
  final bool expand;

  const ExpandableText({Key key, this.text, this.maxLines, this.style, this.expand}) : super(key: key);

  @override
  State<StatefulWidget> createState() {
    return _ExpandableTextState(text, maxLines, style, expand);
  }

}

class _ExpandableTextState extends State<ExpandableText> {
  final String text;
  final int maxLines;
  final TextStyle style;
  bool expand;

  _ExpandableTextState(this.text, this.maxLines, this.style, this.expand) {
    if (expand == null) {
      expand = false;
    }
  }

  @override
  Widget build(BuildContext context) {
    return LayoutBuilder(builder: (context, size) {
      final span = TextSpan(text: text ?? '', style: style);
      final tp = TextPainter(
          text: span, maxLines: maxLines, textDirection: TextDirection.ltr);
      tp.layout(maxWidth: size.maxWidth);

      if (tp.didExceedMaxLines) {
        return Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: <Widget>[
            expand ?
            Text(text ?? '', style: style) :
            Text(text ?? '', maxLines: maxLines,
                overflow: TextOverflow.ellipsis,
                style: style),

            GestureDetector(
              behavior: HitTestBehavior.translucent,
              onTap: () {
                setState(() {
                  expand = !expand;
                });
              },
              child: Container(
                padding: EdgeInsets.only(top: 2),
                child: Text(expand ? '收起' : '全文', style: TextStyle(
                    fontSize: style != null ? style.fontSize : null,
                    color: Colors.blue)),
              ),
            ),
          ],
        );
      } else {
        return Text(text ?? '', style: style);
      }
    });
  }
}

Widget ysTextExpend({String text,int maxLines,TextStyle style,bool expand = false}) {
  return StatefulBuilder(
    builder: (context,ysState){
      return LayoutBuilder(builder: (context, size) {
        final span = TextSpan(text: text ?? '', style: style);
        final tp = TextPainter(
            text: span, maxLines: maxLines, textDirection: TextDirection.ltr);
        tp.layout(maxWidth: size.maxWidth);

        if (tp.didExceedMaxLines) {
          return Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: <Widget>[
              expand ?
              Text(text ?? '', style: style) :
              Text(text ?? '', maxLines: maxLines,
                  overflow: TextOverflow.ellipsis,
                  style: style),

              GestureDetector(
                behavior: HitTestBehavior.translucent,
                onTap: () {
                  ysState(() {
                    expand = !expand;
                  });
                },
                child: Container(
                  padding: EdgeInsets.only(top: 2),
                  child: Text(expand ? '收起' : '全文', style: TextStyle(
                      fontSize: style != null ? style.fontSize : null,
                      color: Colors.blue)),
                ),
              ),
            ],
          );
        } else {
          return Text(text ?? '', style: style);
        }
      });
    },
  );
}

class YSPicker extends StatefulWidget {
  final ValueSetter choose;
  final List dataArray;
  final String title;
  const YSPicker({Key key, this.choose, this.dataArray, this.title}) : super(key: key);
  @override
  _YSPickerState createState() => _YSPickerState();
}

class _YSPickerState extends State<YSPicker> {
  var _value;
  @override
  Widget build(BuildContext context) {
    _value = widget.dataArray[0];
    return Container(
      color: Colors.transparent,
      height: hsp(600),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.end,
        children: [
          Container(
            height: hsp(100),
            padding: EdgeInsets.only(left: wsp(40),right: wsp(40)),
            decoration: BoxDecoration(
                color: Colors.white,
                border: Border(bottom: BorderSide(width: 0.5,color: Color(0xFFEEEEEE)))
            ),
            child: Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                GestureDetector(
                  child: Text('取消',style: TextStyle(fontSize: zsp(30),color: Color(0xFF999999)),),
                  onTap: (){
                    Navigator.pop(context);
                  },
                ),
                GestureDetector(
                  child: Text('确定',style: TextStyle(fontSize: zsp(30),color: Color(0xFF108DE9)),),
                  onTap: (){
                    widget.choose(_value);
                    Navigator.pop(context);
                  },
                )
              ],
            ),
          ),
          Container(
            height: hsp(500),
            padding: EdgeInsets.all(10),
            decoration: BoxDecoration(
                color: Colors.white,
                borderRadius: BorderRadius.only(topLeft: Radius.circular(20),topRight: Radius.circular(20))
            ),
            child: CupertinoPicker(
              children: [
                for(int i=0;i<widget.dataArray.length;i++)Text('${widget.dataArray[i][widget.title]}')
              ],
              itemExtent: hsp(100),
              onSelectedItemChanged: (value){
                _value = widget.dataArray[value];
              },
            ),
          ),
        ],
      ),
    );
  }
}

timeTag(String time) {
  DateTime date = DateTime.parse(time);
  DateTime now = DateTime.parse('${DateTime.now().year}-${DateTime.now().month}-${DateTime.now().day} 00:00:00');
  String tagStr;
  tagStr = '${date.difference(now).inHours}';
  if(date.difference(now).inHours>=0&&date.difference(now).inHours<24){
    tagStr = '今天';
  }else if(date.difference(now).inHours>=24&&date.difference(now).inHours<48){
    tagStr = '明天';
  }else if(date.difference(now).inHours>=48&&date.difference(now).inHours<72){
    tagStr = '后天';
  }else{
    switch(date.weekday){
      case 1: tagStr = '周一';break;
      case 2: tagStr = '周二';break;
      case 3: tagStr = '周三';break;
      case 4: tagStr = '周四';break;
      case 5: tagStr = '周五';break;
      case 6: tagStr = '周六';break;
      case 7: tagStr = '周日';break;
    }
  }
  return tagStr;
}

class DashedRect extends StatelessWidget {
  final Color color;
  final double strokeWidth;
  final double gap;

  DashedRect(
      {this.color = Colors.black, this.strokeWidth = 1.0, this.gap = 5.0});

  @override
  Widget build(BuildContext context) {
    return Container(
      child: Padding(
        padding: EdgeInsets.all(strokeWidth / 2),
        child: CustomPaint(
          painter:
          DashRectPainter(color: color, strokeWidth: strokeWidth, gap: gap),
        ),
      ),
    );
  }
}

class DashRectPainter extends CustomPainter {
  double strokeWidth;
  Color color;
  double gap;

  DashRectPainter(
      {this.strokeWidth = 5.0, this.color = Colors.red, this.gap = 5.0});

  @override
  void paint(Canvas canvas, Size size) {
    Paint dashedPaint = Paint()
      ..color = color
      ..strokeWidth = strokeWidth
      ..style = PaintingStyle.stroke;

    double x = size.width;
    double y = size.height;

    Path _topPath = getDashedPath(
      a: math.Point(0, 0),
      b: math.Point(x, 0),
      gap: gap,
    );

    Path _rightPath = getDashedPath(
      a: math.Point(x, 0),
      b: math.Point(x, y),
      gap: gap,
    );

    Path _bottomPath = getDashedPath(
      a: math.Point(0, y),
      b: math.Point(x, y),
      gap: gap,
    );

    Path _leftPath = getDashedPath(
      a: math.Point(0, 0),
      b: math.Point(0.001, y),
      gap: gap,
    );

    canvas.drawPath(_topPath, dashedPaint);
    canvas.drawPath(_rightPath, dashedPaint);
    canvas.drawPath(_bottomPath, dashedPaint);
    canvas.drawPath(_leftPath, dashedPaint);
  }

  Path getDashedPath({
    @required math.Point<double> a,
    @required math.Point<double> b,
    @required gap,
  }) {
    Size size = Size(b.x - a.x, b.y - a.y);
    Path path = Path();
    path.moveTo(a.x, a.y);
    bool shouldDraw = true;
    math.Point currentPoint = math.Point(a.x, a.y);

    num radians = math.atan(size.height / size.width);

    num dx = math.cos(radians) * gap < 0
        ? math.cos(radians) * gap * -1
        : math.cos(radians) * gap;

    num dy = math.sin(radians) * gap < 0
        ? math.sin(radians) * gap * -1
        : math.sin(radians) * gap;

    while (currentPoint.x <= b.x && currentPoint.y <= b.y) {
      shouldDraw
          ? path.lineTo(currentPoint.x, currentPoint.y)
          : path.moveTo(currentPoint.x, currentPoint.y);
      shouldDraw = !shouldDraw;
      currentPoint = math.Point(
        currentPoint.x + dx,
        currentPoint.y + dy,
      );
    }
    return path;
  }

  @override
  bool shouldRepaint(CustomPainter oldDelegate) {
    return true;
  }
}