import 'package:auto_route/auto_route.dart';
import 'package:flutter/material.dart';
import 'package:hooks_riverpod/hooks_riverpod.dart';
import 'package:immich_mobile/extensions/build_context_extensions.dart';
import 'package:immich_mobile/extensions/translate_extensions.dart';
import 'package:immich_mobile/pages/common/large_leading_tile.dart';
import 'package:immich_mobile/presentation/widgets/images/thumbnail.widget.dart';
import 'package:immich_mobile/providers/infrastructure/asset.provider.dart';
import 'package:immich_mobile/routing/router.dart';
import 'package:immich_mobile/widgets/common/search_field.dart';
import 'package:immich_mobile/widgets/map/map_thumbnail.dart';
import 'package:maplibre_gl/maplibre_gl.dart';

@RoutePage()
class DriftPlacePage extends StatelessWidget {
  const DriftPlacePage({super.key, this.currentLocation});

  final LatLng? currentLocation;

  @override
  Widget build(BuildContext context) {
    final ValueNotifier<String?> search = ValueNotifier(null);

    return Scaffold(
      body: ValueListenableBuilder(
        valueListenable: search,
        builder: (context, searchValue, child) {
          return CustomScrollView(
            slivers: [
              _PlaceSliverAppBar(search: search),
              _Map(search: search, currentLocation: currentLocation),
              _PlaceList(search: search),
            ],
          );
        },
      ),
    );
  }
}

class _PlaceSliverAppBar extends StatelessWidget {
  const _PlaceSliverAppBar({required this.search});

  final ValueNotifier<String?> search;

  @override
  Widget build(BuildContext context) {
    final searchFocusNode = FocusNode();

    return SliverAppBar(
      floating: true,
      pinned: true,
      snap: false,
      backgroundColor: context.colorScheme.surfaceContainer,
      shape: const RoundedRectangleBorder(
        borderRadius: BorderRadius.all(Radius.circular(5)),
      ),
      automaticallyImplyLeading: search.value == null,
      centerTitle: true,
      title: search.value != null
          ? SearchField(
              focusNode: searchFocusNode,
              onTapOutside: (_) => searchFocusNode.unfocus(),
              onChanged: (value) => search.value = value,
              filled: true,
              hintText: 'filter_places'.t(context: context),
              autofocus: true,
            )
          : Text('places'.t(context: context)),
      actions: [
        IconButton(
          icon: Icon(search.value != null ? Icons.close : Icons.search),
          onPressed: () {
            search.value = search.value == null ? '' : null;
          },
        ),
      ],
    );
  }
}

class _Map extends StatelessWidget {
  const _Map({required this.search, this.currentLocation});

  final ValueNotifier<String?> search;
  final LatLng? currentLocation;

  @override
  Widget build(BuildContext context) {
    return search.value == null
        ? SliverPadding(
            padding: const EdgeInsets.all(16.0),
            sliver: SliverToBoxAdapter(
              child: SizedBox(
                height: 200,
                width: context.width,
                // TODO: migrate to DriftMapRoute after merging #19898
                child: MapThumbnail(
                  onTap: (_, __) => context.pushRoute(MapRoute(initialLocation: currentLocation)),
                  zoom: 8,
                  centre: currentLocation ??
                      const LatLng(
                        21.44950,
                        -157.91959,
                      ),
                  showAttribution: false,
                  themeMode: context.isDarkTheme ? ThemeMode.dark : ThemeMode.light,
                ),
              ),
            ),
          )
        : const SliverToBoxAdapter(
            child: SizedBox.shrink(),
          );
  }
}

class _PlaceList extends ConsumerWidget {
  const _PlaceList({required this.search});

  final ValueNotifier<String?> search;

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final places = ref.watch(placesProvider);

    return places.when(
      loading: () => const SliverToBoxAdapter(
        child: Center(
          child: Padding(
            padding: EdgeInsets.all(20.0),
            child: CircularProgressIndicator(),
          ),
        ),
      ),
      error: (error, stack) => SliverToBoxAdapter(
        child: Center(
          child: Padding(
            padding: const EdgeInsets.all(20.0),
            child: Text(
              'Error loading places: $error, stack: $stack',
              style: TextStyle(
                color: context.colorScheme.error,
              ),
            ),
          ),
        ),
      ),
      data: (places) {
        if (search.value != null) {
          places = places.where((place) {
            return place.$1.toLowerCase().contains(search.value!.toLowerCase());
          }).toList();
        }

        return SliverList.builder(
          itemCount: places.length,
          itemBuilder: (context, index) {
            final place = places[index];
            return _PlaceTile(place: place);
          },
        );
      },
    );
  }
}

class _PlaceTile extends StatelessWidget {
  const _PlaceTile({required this.place});

  final (String, String) place;

  @override
  Widget build(BuildContext context) {
    return LargeLeadingTile(
      onTap: () => context.pushRoute(DriftPlaceDetailRoute(place: place.$1)),
      title: Text(
        place.$1,
        style: context.textTheme.titleMedium?.copyWith(
          fontWeight: FontWeight.w500,
        ),
      ),
      leading: ClipRRect(
        borderRadius: const BorderRadius.all(
          Radius.circular(20),
        ),
        child: Thumbnail(
          size: const Size(80, 80),
          fit: BoxFit.cover,
          remoteId: place.$2,
        ),
      ),
    );
  }
}