import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:reverse_nn/enums/schedule.dart';
import 'package:reverse_nn/utils/scheduler.dart';
import 'package:reverse_nn/widgets/loader_widget.dart';
import 'package:reverse_nn/widgets/schedule_element_widget.dart';

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

  @override
  State<ScheduleWidget> createState() => _ScheduleWidgetState();
}

class _ScheduleWidgetState extends State<ScheduleWidget> {
  bool _loading = true;
  List<ScheduleElement> _schedule = List.empty();

  void loadScheduleData() async {
    setState(() { _loading = true; });
    setState(() { _schedule = Scheduler.getScheduleList(); });
    setState(() { _loading = false; });
  }

  @override
  Widget build(BuildContext context) {
    loadScheduleData();
    
    Future.delayed(const Duration(seconds: 15), () => loadScheduleData());

    return _loading && _schedule.isNotEmpty ? const LoaderWidget() : ListView.separated(
      scrollDirection: Axis.vertical,
      shrinkWrap: true,
      padding: const EdgeInsets.all(10),
      separatorBuilder: (BuildContext context, int index) {
        return SizedBox(height: index == 0 ? 10 : 4);
      },
      itemCount: _schedule.length,
      itemBuilder: (ctx, i) {
        if(i == 0) { return CurrentReversWidget(scheduleElement: _schedule[i]); }
        return ScheduledReversWidget(scheduleElement: _schedule[i]);
      },
    );
  }
}