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/widgets/offline_widget.dart';
import 'package:paperless_mobile/features/documents/view/widgets/adaptive_documents_view.dart';
import 'package:paperless_mobile/features/documents/view/widgets/documents_empty_state.dart';
import 'package:paperless_mobile/features/paged_document_view/view/document_paging_view_mixin.dart';
import 'package:paperless_mobile/features/similar_documents/cubit/similar_documents_cubit.dart';
import 'package:paperless_mobile/helpers/message_helpers.dart';
import 'package:paperless_mobile/routes/document_details_route.dart';

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

  @override
  State<SimilarDocumentsView> createState() => _SimilarDocumentsViewState();
}

class _SimilarDocumentsViewState extends State<SimilarDocumentsView>
    with DocumentPagingViewMixin<SimilarDocumentsView, SimilarDocumentsCubit> {
  @override
  final pagingScrollController = ScrollController();

  @override
  void initState() {
    super.initState();
    try {
      context.read<SimilarDocumentsCubit>().initialize();
    } on PaperlessServerException catch (error, stackTrace) {
      showErrorMessage(context, error, stackTrace);
    }
  }

  @override
  Widget build(BuildContext context) {
    return BlocConsumer<ConnectivityCubit, ConnectivityState>(
      listenWhen: (previous, current) =>
          !previous.isConnected && current.isConnected,
      listener: (context, state) =>
          context.read<SimilarDocumentsCubit>().initialize(),
      builder: (context, connectivity) {
        return BlocBuilder<SimilarDocumentsCubit, SimilarDocumentsState>(
          builder: (context, state) {
            if (!connectivity.isConnected && !state.hasLoaded) {
              return const OfflineWidget();
            }
            if (state.hasLoaded &&
                !state.isLoading &&
                state.documents.isEmpty) {
              return DocumentsEmptyState(
                state: state,
                onReset: () => context
                    .read<SimilarDocumentsCubit>()
                    .updateFilter(
                      filter: DocumentFilter.initial.copyWith(
                        moreLike: () =>
                            context.read<SimilarDocumentsCubit>().documentId,
                      ),
                    ),
              );
            }
            return DefaultAdaptiveDocumentsView(
              scrollController: pagingScrollController,
              documents: state.documents,
              hasInternetConnection: connectivity.isConnected,
              isLabelClickable: false,
              isLoading: state.isLoading,
              hasLoaded: state.hasLoaded,
              enableHeroAnimation: false,
              onTap: (document) {
                Navigator.pushNamed(
                  context,
                  DocumentDetailsRoute.routeName,
                  arguments: DocumentDetailsRouteArguments(
                    document: document,
                    isLabelClickable: false,
                  ),
                );
              },
            );
          },
        );
      },
    );
  }
}