import 'package:didvan/models/view/app_bar_data.dart';
import 'package:didvan/widgets/didvan/app_bar.dart';
import 'package:flutter/material.dart';

class DidvanScaffold extends StatefulWidget {
  final List<Widget>? slivers;
  final AppBarData appBarData;
  final bool hasPadding;
  const DidvanScaffold({
    Key? key,
    this.slivers,
    required this.appBarData,
    this.hasPadding = true,
  }) : super(key: key);

  @override
  State<DidvanScaffold> createState() => _DidvanScaffoldState();
}

class _DidvanScaffoldState extends State<DidvanScaffold> {
  bool _isElevated = false;
  final ScrollController _scrollController = ScrollController();

  @override
  void initState() {
    _scrollController.addListener(() => _handleAppBarElevation());
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: CustomScrollView(
        slivers: [
          SliverAppBar(
            backgroundColor: Theme.of(context).backgroundColor,
            automaticallyImplyLeading: false,
            pinned: true,
            flexibleSpace: DidvanAppBar(appBarData: widget.appBarData),
          ),
          if (widget.slivers != null) ...widget.slivers!
        ],
      ),
    );
  }

  void _handleAppBarElevation() {
    if (_scrollController.position.pixels > kToolbarHeight && !_isElevated) {
      setState(() {
        _isElevated = true;
      });
    }
    if (_scrollController.position.pixels < kToolbarHeight && _isElevated) {
      setState(() {
        _isElevated = false;
      });
    }
  }
}