collection_request_details_screen.dart

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import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:maps_launcher/maps_launcher.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:go_router/go_router.dart';
import 'package:flutter/services.dart';
import 'package:flutter/material.dart';
 
import '../../../../../core/common/entities/collection_entity.dart';
import '../../../../../core/common/enums/collection_status.dart';
import '../../../../../core/ui/widgets/custom_scaffold.dart';
import '../../../../../core/ui/widgets/custom_snackbar.dart';
import '../../../../../core/ui/theme/color_palette.dart';
import 'widgets/collection_details_body.dart';
import '../../bloc/collections_bloc/collections_bloc.dart';
import 'widgets/collection_slider.dart';
import 'widgets/map_app_bar.dart';
 
class CollectionRequestDetailsScreen extends StatefulWidget {
  final GoRouterState state;
  const CollectionRequestDetailsScreen({super.key, required this.state});
 
  @override
  State<CollectionRequestDetailsScreen> createState() => _CollectionRequestDetailsScreenState();
}
 
class _CollectionRequestDetailsScreenState extends State<CollectionRequestDetailsScreen> {
  final ScrollController _scrollController = ScrollController();
  late CollectionStatus? currentStatus;
  bool _showTitle = false;
  CollectionEntity? _collectionEntity;
 
  @override
  void initState() {
    super.initState();
    _collectionEntity = widget.state.extra as CollectionEntity?;
    _scrollController.addListener(_onScroll);
    currentStatus = _collectionEntity?.status;
  }
 
  @override
  void dispose() {
    _scrollController.removeListener(_onScroll);
    _scrollController.dispose();
    super.dispose();
  }
 
  void _onScroll() {
    if (_scrollController.offset > 140 && !_showTitle) {
      setState(() => _showTitle = true);
    } else if (_scrollController.offset <= 140 && _showTitle) {
      setState(() => _showTitle = false);
    }
  }
 
  @override
  Widget build(BuildContext context) {
    // Use the stored collection entity or try to get it from the state
    final CollectionEntity collection = _collectionEntity ?? widget.state.extra as CollectionEntity;
    
    // Handle the case where collection is null
    // if (collection == null) {
    //   return CustomScaffold(
    //     backgroundColor: ColorPalette.white,
    //     body: Center(
    //       child: Text('Collection details not available'),
    //     ),
    //   );
    // }
    
    return BlocConsumer<CollectionsBloc, CollectionsState>(
      listener: _handleBlocStateChanges,
      builder: (context, state) => CustomScaffold(
        isLoading: state is CollectionsLoading,
        backgroundColor: ColorPalette.white,
        body: Container(
          color: ColorPalette.antiFlashWhite,
          child: CustomScrollView(
            controller: _scrollController,
            slivers: [
              MapAppBar(
                status: currentStatus ?? CollectionStatus.defaultStatus,
                showTitle: _showTitle,
                lat: collection.lat ?? "0.0",
                lng: collection.lng ?? "0.0",
              ),
              SliverToBoxAdapter(
                child: Padding(
                  padding: EdgeInsets.only(top: 20.sp, left: 20.sp, right: 20.sp),
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.center,
                    children: [
                      CollectionDetailsBody(
                        collection: collection,
                        currentStatus: currentStatus ?? CollectionStatus.defaultStatus,
                      ),
                      CollectionSlider(
                        collectionId: collection.id ?? 0,
                        status: currentStatus ?? CollectionStatus.defaultStatus,
                        collection: collection,
                      )
                    ].map((e) => Padding(padding: EdgeInsets.only(bottom: 12.sp), child: e)).toList(),
                  ),
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
 
  void _handleBlocStateChanges(BuildContext context, CollectionsState state) {
    // Use the stored collection entity or try to get it from the state
    final collection = _collectionEntity ?? widget.state.extra as CollectionEntity?;
    
    // Skip processing if collection is null
    if (collection == null) return;
    
    if (state is CollectionStatusUpdateError) {
      CustomSnackBar.display(context, ColorPalette.red, state.failure.message);
    } else if (state is CollectionStatusUpdateSuccess) {
      HapticFeedback.mediumImpact();
      setState(() {currentStatus = state.resCollectionStatusEntity.status;});
      if (state.resCollectionStatusEntity.status == CollectionStatus.cancelled) context.pop();
      if (state.resCollectionStatusEntity.status == CollectionStatus.onTheWay) {
        MapsLauncher.launchCoordinates(
          double.parse(collection.lat ?? "0.0"),
          double.parse(collection.lng ?? "0.0"),
        );
      }
    }
  }
}