import 'package:diplomaticquarterapp/config/shared_pref_kay.dart';
import 'package:diplomaticquarterapp/models/Appointments/DoctorListResponse.dart';
import 'package:diplomaticquarterapp/models/Appointments/FreeSlot.dart';
import 'package:diplomaticquarterapp/models/Appointments/timeSlot.dart';
import 'package:diplomaticquarterapp/services/appointment_services/GetDoctorsList.dart';
import 'package:diplomaticquarterapp/uitl/app_shared_preferences.dart';
import 'package:diplomaticquarterapp/uitl/app_toast.dart';
import 'package:diplomaticquarterapp/uitl/gif_loader_dialog_utils.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:intl/intl.dart';
import 'package:table_calendar/table_calendar.dart';

import '../../../uitl/date_uitl.dart';

class DocAvailableAppointments extends StatefulWidget {
  DoctorList doctor;
  static bool areSlotsAvailable = false;
  static bool areAppointmentsAvailable = false;
  static DateTime selectedAppoDateTime;
  static String selectedDate;
  static String selectedTime;
  bool isLiveCareAppointment;

  DocAvailableAppointments(
      {@required this.doctor, @required this.isLiveCareAppointment});

  @override
  _DocAvailableAppointmentsState createState() =>
      _DocAvailableAppointmentsState();
}

class _DocAvailableAppointmentsState extends State<DocAvailableAppointments>
    with TickerProviderStateMixin {
  Map<DateTime, List> _events;
  AnimationController _animationController;
  CalendarController _calendarController;

  AppSharedPreferences sharedPref = new AppSharedPreferences();

  var selectedDate = "";
  dynamic selectedDateJSON;
  dynamic jsonFreeSlots;

  List<TimeSlot> docFreeSlots = [];
  List<TimeSlot> dayEvents = [];

  int selectedButtonIndex = 0;

  dynamic freeSlotsResponse;

  ScrollController _scrollController;

  var language;

  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    final _selectedDay = DateTime.now();

    _scrollController = new ScrollController();

    _events = {
      _selectedDay: ['Event A0']
    };

    WidgetsBinding.instance.addPostFrameCallback((_) async {
      getCurrentLanguage();
      if (widget.isLiveCareAppointment)
        getDoctorScheduledFreeSlots(context, widget.doctor);
      else {
        getDoctorFreeSlots(context, widget.doctor);
      }
    });

    _calendarController = CalendarController();
    _animationController = AnimationController(
      vsync: this,
      duration: const Duration(milliseconds: 50),
    );

    _animationController.forward();
  }

  @override
  void dispose() {
    _animationController.dispose();
    _calendarController.dispose();
    super.dispose();
  }

  void _onDaySelected(DateTime day, List events) {
    final DateFormat formatter = DateFormat('yyyy-MM-dd');
    setState(() {
      this.selectedDate =
          DateUtil.getWeekDayMonthDayYearDateFormatted(day, language);
      openTimeSlotsPickerForDate(day, docFreeSlots);
      DocAvailableAppointments.selectedDate = formatter.format(day);
      print(DocAvailableAppointments.selectedDate);
    });
  }

  void _onVisibleDaysChanged(
      DateTime first, DateTime last, CalendarFormat format) {
    print('CALLBACK: _onVisibleDaysChanged');
  }

  void _onCalendarCreated(
      DateTime first, DateTime last, CalendarFormat format) {
    print('CALLBACK: _onCalendarCreated');
  }

  @override
  Widget build(BuildContext context) {
    return SingleChildScrollView(
      child: Container(
        decoration: BoxDecoration(
            color: Colors.white, borderRadius: BorderRadius.circular(10.0)),
        margin: EdgeInsets.all(20.0),
        padding: EdgeInsets.only(bottom: 10.0, top: 10.0),
        child: Column(
          mainAxisSize: MainAxisSize.max,
          children: <Widget>[
            Text(selectedDate,
                style: TextStyle(fontSize: 18.0, fontWeight: FontWeight.bold)),
            Container(
              height: 50,
              margin: EdgeInsets.all(20.0),
              child: ListView.builder(
                controller: _scrollController,
                scrollDirection: Axis.horizontal,
                itemCount: dayEvents.length,
                itemBuilder: (context, index) {
                  return Container(
                    margin: EdgeInsets.only(right: 10.0),
                    child: ButtonTheme(
                        shape: RoundedRectangleBorder(
                          borderRadius: BorderRadius.circular(5.0),
                          side: BorderSide(
                            color: Color(0xff76cfb7), //Color of the border
                            style: BorderStyle.solid, //Style of the border
                            width: 1.5, //width of the border
                          ),
                        ),
                        minWidth: MediaQuery.of(context).size.width * 0.2,
                        child: index == selectedButtonIndex
                            ? getSelectedButton(index)
                            : getNormalButton(index)),
                  );
                },
              ),
            ),
            _buildTableCalendarWithBuilders(),
          ],
        ),
      ),
    );
  }

  Widget _buildTableCalendarWithBuilders() {
    return TableCalendar(
      locale: language == "en" ? 'en_US' : 'ar_SA',
      calendarController: _calendarController,
      events: _events,
      initialCalendarFormat: CalendarFormat.month,
      startDay: DateTime.now(),
      formatAnimation: FormatAnimation.slide,
      startingDayOfWeek: StartingDayOfWeek.sunday,
      weekendDays: [DateTime.friday, DateTime.saturday],
      availableGestures: AvailableGestures.horizontalSwipe,
      availableCalendarFormats: const {
        CalendarFormat.month: '',
        CalendarFormat.week: '',
      },
      calendarStyle: CalendarStyle(
        outsideDaysVisible: false,
        weekendStyle: TextStyle().copyWith(color: Colors.blue[800]),
        holidayStyle: TextStyle().copyWith(color: Colors.blue[800]),
      ),
      daysOfWeekStyle: DaysOfWeekStyle(
        weekendStyle: TextStyle().copyWith(color: Colors.black, fontSize: 14.0),
        weekdayStyle: TextStyle().copyWith(color: Colors.black, fontSize: 14.0),
      ),
      headerStyle: HeaderStyle(
        centerHeaderTitle: true,
        formatButtonVisible: false,
      ),
      builders: CalendarBuilders(
        selectedDayBuilder: (context, date, _) {
          return FadeTransition(
            opacity: Tween(begin: 0.0, end: 1.0).animate(_animationController),
            child: Container(
              margin: const EdgeInsets.all(4.0),
              padding: const EdgeInsets.only(top: 5.0, left: 5.0),
              color: Colors.transparent,
              width: 0,
              height: 0,
              child: Text(
                '${date.day}',
                style: TextStyle().copyWith(fontSize: 16.0),
              ),
            ),
          );
        },
        todayDayBuilder: (context, date, _) {
          return Container(
            decoration: BoxDecoration(
              shape: BoxShape.circle,
              color: _calendarController.isSelected(date)
                  ? Colors.green[400]
                  : _calendarController.isToday(date)
                      ? Colors.transparent
                      : Color(0xff76cfb7),
            ),
            width: 40.0,
            height: 40.0,
            child: Center(
              child: Text(
                '${date.day}',
                style: TextStyle().copyWith(
                  color: Colors.white,
                  fontSize: 14.0,
                ),
              ),
            ),
          );
        },
        markersBuilder: (context, date, events, _) {
          final children = <Widget>[];
          if (events.isNotEmpty) {
            children.add(
              Positioned(
                right: 4,
                bottom: 4,
                child: _buildEventsMarker(date, events),
              ),
            );
          }

          return children;
        },
      ),
      onDaySelected: (date, event, _) {
        _onDaySelected(date, event);
        _animationController.forward(from: 0.0);
      },
      onVisibleDaysChanged: _onVisibleDaysChanged,
      onCalendarCreated: _onCalendarCreated,
    );
  }

  openTimeSlotsPickerForDate(DateTime dateStart, List<TimeSlot> freeSlots) {
    dayEvents.clear();
    DateTime dateStartObj = new DateTime(
        dateStart.year, dateStart.month, dateStart.day, 0, 0, 0, 0, 0);

    freeSlots.forEach((v) {
      if (v.start == dateStartObj) dayEvents.add(v);
    });

    setState(() {
      if (dayEvents.length != 0)
        DocAvailableAppointments.areSlotsAvailable = true;
      else
        DocAvailableAppointments.areSlotsAvailable = false;

      selectedButtonIndex = 0;

      DocAvailableAppointments.selectedTime =
          dayEvents[selectedButtonIndex].isoTime;

//      _scrollController.animateTo(0.0, duration: new Duration(seconds: 1), curve: Curves.ease);
    });
  }

  Future<Map<DateTime, List>> _getJSONSlots() async {
    Map<DateTime, List> _eventsParsed;
    List<FreeSlot> slotsList = [];
    DateTime date;
    final DateFormat formatter = DateFormat('HH:mm');
    final DateFormat dateFormatter = DateFormat('yyyy-MM-dd');
    for (var i = 0; i < freeSlotsResponse.length; i++) {
      date = DateUtil.convertStringToDate(freeSlotsResponse[i]);
      slotsList.add(FreeSlot(date, ['slot']));
      docFreeSlots.add(TimeSlot(
          isoTime: formatter.format(date),
          start: new DateTime(date.year, date.month, date.day, 0, 0, 0, 0),
          end: date));
    }
    _eventsParsed =
        Map.fromIterable(slotsList, key: (e) => e.slot, value: (e) => e.event);
    setState(() {
      DocAvailableAppointments.selectedDate = dateFormatter
          .format(DateUtil.convertStringToDate(freeSlotsResponse[0]));
      selectedDate = DateUtil.getWeekDayMonthDayYearDateFormatted(
          DateUtil.convertStringToDate(freeSlotsResponse[0]), language);
      selectedDateJSON = freeSlotsResponse[0];
    });
    openTimeSlotsPickerForDate(
        DateUtil.convertStringToDate(selectedDateJSON), docFreeSlots);
    _calendarController
        .setFocusedDay(DateUtil.convertStringToDate(selectedDateJSON));
    return _eventsParsed;
  }

  Widget getNormalButton(int index) {
    return RaisedButton(
      color: Colors.white,
      textColor: new Color(0xFF60686b),
      onPressed: () {
        setState(() {
          selectedButtonIndex = index;
          DocAvailableAppointments.selectedTime = dayEvents[index].isoTime;
          print(DocAvailableAppointments.selectedTime);
        });
      },
      child: Text(dayEvents[index].isoTime,
          style: TextStyle(fontSize: 16.0, fontWeight: FontWeight.bold)),
    );
  }

  Widget getSelectedButton(int index) {
    return RaisedButton(
      color: Color(0xff76cfb7), //Color of the border
      textColor: Colors.white,
      onPressed: () {
        setState(() {
          selectedButtonIndex = index;
          DocAvailableAppointments.selectedTime = dayEvents[index].isoTime;
          print(DocAvailableAppointments.selectedTime);
        });
      },
      child: Text(dayEvents[index].isoTime,
          style: TextStyle(fontSize: 16.0, fontWeight: FontWeight.bold)),
    );
  }

  getDoctorFreeSlots(context, DoctorList docObject) {
    GifLoaderDialogUtils.showMyDialog(context);
    DoctorsListService service = new DoctorsListService();
    service
        .getDoctorFreeSlots(docObject.doctorID, docObject.clinicID,
            docObject.projectID, context)
        .then((res) {
      GifLoaderDialogUtils.hideDialog(context);
      if (res['MessageStatus'] == 1) {
        if (res['FreeTimeSlots'].length != 0) {
          DocAvailableAppointments.areAppointmentsAvailable = true;
          freeSlotsResponse = res['FreeTimeSlots'];
          print("res['FreeTimeSlots']");
          print(res['FreeTimeSlots'].length);
          _getJSONSlots().then((value) => {
                setState(() => {_events.clear(), _events = value})
              });
        } else {
          DocAvailableAppointments.areAppointmentsAvailable = false;
        }
      } else {
        AppToast.showErrorToast(message: res['ErrorEndUserMessage']);
      }
    }).catchError((err) {
      GifLoaderDialogUtils.hideDialog(context);
      AppToast.showErrorToast(message: err);
      print(err);
    });
  }

  getDoctorScheduledFreeSlots(context, DoctorList docObject) {
    GifLoaderDialogUtils.showMyDialog(context);
    DoctorsListService service = new DoctorsListService();
    service
        .getDoctorScheduledFreeSlots(docObject.doctorID, docObject.clinicID,
            docObject.projectID, docObject.serviceID, context)
        .then((res) {
      GifLoaderDialogUtils.hideDialog(context);
      if (res['MessageStatus'] == 1) {
        if (res['PatientER_DoctorFreeSlots'].length != 0) {
          DocAvailableAppointments.areAppointmentsAvailable = true;
          freeSlotsResponse = res['PatientER_DoctorFreeSlots'];
          print("res['PatientER_DoctorFreeSlots']");
          print(res['PatientER_DoctorFreeSlots'].length);
          _getJSONSlots().then((value) => {
                setState(() => {_events.clear(), _events = value})
              });
        } else {
          DocAvailableAppointments.areAppointmentsAvailable = false;
        }
      } else {
        AppToast.showErrorToast(message: res['ErrorEndUserMessage']);
      }
    }).catchError((err) {
      GifLoaderDialogUtils.hideDialog(context);
      AppToast.showErrorToast(message: err);
      print(err);
    });
  }

  getCurrentLanguage() async {
    var languageID =
        await sharedPref.getStringWithDefaultValue(APP_LANGUAGE, 'ar');
    setState(() {
      this.language = languageID;
    });
  }

  Widget _buildEventsMarker(DateTime date, List events) {
    return Container(
      decoration: BoxDecoration(
        shape: BoxShape.circle,
        color: _calendarController.isSelected(date)
            ? Color(0xffB8382C)
            : _calendarController.isToday(date)
                ? Colors.brown[300]
                : Color(0xff76cfb7),
      ),
      width: 40.0,
      height: 40.0,
      child: Center(
        child: Text(
          '${date.day}',
          style: TextStyle().copyWith(
            color: Colors.white,
            fontSize: 14.0,
          ),
        ),
      ),
    );
  }
}