import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:paperless_api/paperless_api.dart';
import 'package:paperless_mobile/core/bloc/connectivity_cubit.dart';
import 'package:paperless_mobile/core/translation/matching_algorithm_localization_mapper.dart';
import 'package:paperless_mobile/core/widgets/offline_widget.dart';
import 'package:paperless_mobile/features/labels/view/widgets/label_item.dart';
import 'package:paperless_mobile/extensions/flutter_extensions.dart';

class LabelTabView<T extends Label> extends StatelessWidget {
  final Map<int, T> labels;
  final DocumentFilter Function(Label) filterBuilder;
  final void Function(T) onEdit;
  final void Function() onAddNew;

  /// Displayed as the subtitle of the [ListTile]
  final Widget Function(T)? contentBuilder;

  /// Displayed as the leading widget of the [ListTile]
  final Widget Function(T)? leadingBuilder;

  /// Shown on empty State
  final String emptyStateDescription;
  final String emptyStateActionButtonLabel;

  const LabelTabView({
    super.key,
    required this.filterBuilder,
    this.contentBuilder,
    this.leadingBuilder,
    required this.onEdit,
    required this.emptyStateDescription,
    required this.onAddNew,
    required this.emptyStateActionButtonLabel,
    required this.labels,
  });

  @override
  Widget build(BuildContext context) {
    return BlocBuilder<ConnectivityCubit, ConnectivityState>(
      builder: (context, connectivityState) {
        if (!connectivityState.isConnected) {
          return const OfflineWidget();
        }
        final sortedLabels = labels.values.toList()..sort();
        if (labels.isEmpty) {
          return SliverFillRemaining(
            child: Center(
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.center,
                children: [
                  Text(
                    emptyStateDescription,
                    textAlign: TextAlign.center,
                  ),
                  TextButton(
                    onPressed: onAddNew,
                    child: Text(emptyStateActionButtonLabel),
                  ),
                ].padded(),
              ),
            ),
          );
        }
        return SliverList(
          delegate: SliverChildBuilderDelegate(
            (context, index) {
              final l = sortedLabels.elementAt(index);
              return LabelItem<T>(
                name: l.name,
                content: contentBuilder?.call(l) ??
                    Text(
                      translateMatchingAlgorithmName(
                              context, l.matchingAlgorithm) +
                          ((l.match?.isNotEmpty ?? false)
                              ? ": ${l.match}"
                              : ""),
                      maxLines: 2,
                    ),
                onOpenEditPage: onEdit,
                filterBuilder: filterBuilder,
                leading: leadingBuilder?.call(l),
                label: l,
              );
            },
            childCount: labels.length,
          ),
        );
      },
    );
  }
}