import 'package:flutter/material.dart';
import 'package:flutter_hooks/flutter_hooks.dart';
import 'package:collection/collection.dart';
import 'package:fuzzywuzzy/fuzzywuzzy.dart';
import 'package:hooks_riverpod/hooks_riverpod.dart';

import 'package:spotify/spotify.dart';
import 'package:spotube/collections/spotube_icons.dart';
import 'package:spotube/components/shared/fallbacks/anonymous_fallback.dart';
import 'package:spotube/components/shared/waypoint.dart';
import 'package:spotube/components/artist/artist_card.dart';
import 'package:spotube/provider/authentication_provider.dart';
import 'package:spotube/services/queries/queries.dart';
import 'package:tuple/tuple.dart';

class UserArtists extends HookConsumerWidget {
  const UserArtists({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context, ref) {
    final auth = ref.watch(AuthenticationNotifier.provider);

    final artistQuery = useQueries.artist.followedByMe(ref);

    final hasNextPage = artistQuery.pages.isEmpty
        ? false
        : (artistQuery.pages.last.items?.length ?? 0) == 15;

    final searchText = useState('');

    final filteredArtists = useMemoized(() {
      final artists = artistQuery.pages
          .expand<Artist>((page) => page.items ?? const Iterable.empty());

      if (searchText.value.isEmpty) {
        return artists.toList();
      }
      return artists
          .map((e) => Tuple2(
                weightedRatio(e.name!, searchText.value),
                e,
              ))
          .sorted((a, b) => b.item1.compareTo(a.item1))
          .where((e) => e.item1 > 50)
          .map((e) => e.item2)
          .toList();
    }, [artistQuery.pages, searchText.value]);

    if (auth == null) {
      return const AnonymousFallback();
    }

    return Scaffold(
      appBar: PreferredSize(
        preferredSize: const Size.fromHeight(50),
        child: Padding(
          padding: const EdgeInsets.symmetric(horizontal: 8.0),
          child: ColoredBox(
            color: Theme.of(context).scaffoldBackgroundColor,
            child: TextField(
              onChanged: (value) => searchText.value = value,
              decoration: const InputDecoration(
                prefixIcon: Icon(SpotubeIcons.filter),
                hintText: 'Filter artists...',
              ),
            ),
          ),
        ),
      ),
      backgroundColor: Theme.of(context).scaffoldBackgroundColor,
      body: artistQuery.pages.isEmpty
          ? Padding(
              padding: const EdgeInsets.all(20),
              child: Row(
                mainAxisAlignment: MainAxisAlignment.center,
                children: const [
                  CircularProgressIndicator(),
                  SizedBox(width: 10),
                  Text("Loading..."),
                ],
              ),
            )
          : RefreshIndicator(
              onRefresh: () async {
                await artistQuery.refreshAll();
              },
              child: SafeArea(
                child: GridView.builder(
                  itemCount: filteredArtists.length,
                  physics: const AlwaysScrollableScrollPhysics(),
                  gridDelegate: const SliverGridDelegateWithMaxCrossAxisExtent(
                    maxCrossAxisExtent: 200,
                    mainAxisExtent: 250,
                    crossAxisSpacing: 20,
                    mainAxisSpacing: 20,
                  ),
                  padding: const EdgeInsets.all(10),
                  itemBuilder: (context, index) {
                    return HookBuilder(builder: (context) {
                      if (index == artistQuery.pages.length - 1 &&
                          hasNextPage) {
                        return Waypoint(
                          controller: useScrollController(),
                          isGrid: true,
                          onTouchEdge: () {
                            artistQuery.fetchNext();
                          },
                          child: ArtistCard(filteredArtists[index]),
                        );
                      }
                      return ArtistCard(filteredArtists[index]);
                    });
                  },
                ),
              ),
            ),
    );
  }
}