// Copyright 2019 Aleksander Woźniak
// SPDX-License-Identifier: Apache-2.0

import 'package:flutter/material.dart';
import 'package:table_calendar/table_calendar.dart';
import 'package:table_calendar_example/utils.dart';

class TableRangeExample extends StatefulWidget {
  const TableRangeExample({super.key});

  @override
  State<TableRangeExample> createState() => _TableRangeExampleState();
}

class _TableRangeExampleState extends State<TableRangeExample> {
  CalendarFormat _calendarFormat = CalendarFormat.month;
  RangeSelectionMode _rangeSelectionMode = RangeSelectionMode
      .toggledOn; // Can be toggled on/off by longpressing a date
  DateTime _focusedDay = DateTime.now();
  DateTime? _selectedDay;
  DateTime? _rangeStart;
  DateTime? _rangeEnd;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('TableCalendar - Range'),
      ),
      body: TableCalendar(
        firstDay: kFirstDay,
        lastDay: kLastDay,
        focusedDay: _focusedDay,
        selectedDayPredicate: (day) => isSameDay(_selectedDay, day),
        rangeStartDay: _rangeStart,
        rangeEndDay: _rangeEnd,
        calendarFormat: _calendarFormat,
        rangeSelectionMode: _rangeSelectionMode,
        onDaySelected: (selectedDay, focusedDay) {
          if (!isSameDay(_selectedDay, selectedDay)) {
            setState(() {
              _selectedDay = selectedDay;
              _focusedDay = focusedDay;
              _rangeStart = null; // Important to clean those
              _rangeEnd = null;
              _rangeSelectionMode = RangeSelectionMode.toggledOff;
            });
          }
        },
        onRangeSelected: (start, end, focusedDay) {
          setState(() {
            _selectedDay = null;
            _focusedDay = focusedDay;
            _rangeStart = start;
            _rangeEnd = end;
            _rangeSelectionMode = RangeSelectionMode.toggledOn;
          });
        },
        onFormatChanged: (format) {
          if (_calendarFormat != format) {
            setState(() {
              _calendarFormat = format;
            });
          }
        },
        onPageChanged: (focusedDay) {
          _focusedDay = focusedDay;
        },
      ),
    );
  }
}