import 'package:flutter/material.dart';
import 'package:intl/date_symbol_data_local.dart';
import 'package:widgets/shatter/weekly_calendar/week_page.dart';

import 'calendar_utils.dart' show getWeekdays;
import 'day_of_week_view.dart';

/// 总入口，整合顶部的Week控件与底部的Days的PageView控件
class WeeklyCalendar extends StatefulWidget {
  const WeeklyCalendar({
    super.key,
    this.isAutoSelect = false,
    this.onChangedSelectedDate,
    this.onChangedPage,
    this.selectedDate,
  });


  final DateTime? selectedDate;
  final bool isAutoSelect;
  final Function(DateTime)? onChangedSelectedDate;
  final Function(DateTime date, PageState state)? onChangedPage;

  @override
  State<StatefulWidget> createState() => _WeeklyCalendarState();
}

class _WeeklyCalendarState extends State<WeeklyCalendar> {
  final DateTime now = DateTime.now();
  late DateTime selectedDate;
  DateTime currentPageDate = DateTime.now();


  @override
  void initState() {
    initializeDateFormatting("en");  //日期国际化指定
    super.initState();
    selectedDate = widget.selectedDate ?? DateTime.now();
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      mainAxisSize: MainAxisSize.min,
      children: [
        //顶部是固定的星期布局
        customDayOfWeek(),

        const SizedBox(height: 12),

        //底部是每个星期的Days的PageView布局
        WeekPage(
          selectedDate: selectedDate,  //默认选中的日期,如果没有填写默认是今天
          now: now,                    //今天的日期
          isAutoSelect: widget.isAutoSelect,  //翻页是否自动选中
          onChangedPage: (date, state) {
            setState(() {
              currentPageDate = date;
            });
            widget.onChangedPage?.call(date, state);
          },
          onChangedSelectedDate: (date) {
            setState(() {
              selectedDate = date;
            });
            widget.onChangedSelectedDate?.call(date);
          },
        ),
      ],
    );
  }

  //星期的文本显示
  Widget customDayOfWeek() {
    final weekdays = getWeekdays(now, 0);
    return DayOfWeekView(weekdays: weekdays);
  }
}