import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';

import '../api/errors.dart';
import '../models/album.dart';
import '../models/artist.dart';
import '../models/track.dart';
import '../player/player_provider.dart';
import '../shared/widgets/connection_error_banner.dart';
import '../theme/theme_extension.dart';
import 'library_providers.dart';
import 'widgets/album_card.dart';
import 'widgets/artist_card.dart';
import 'widgets/horizontal_scroll_row.dart';
import 'widgets/track_row.dart';

class HomeScreen extends ConsumerWidget {
  const HomeScreen({super.key});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final fs = Theme.of(context).extension<FabledSwordTheme>()!;
    return Scaffold(
      backgroundColor: fs.obsidian,
      body: SafeArea(
        child: ref.watch(homeProvider).when(
              error: (e, _) {
                final code = e is DioException ? ApiError.fromDio(e).code : 'unknown';
                if (code == 'connection_refused') {
                  return ConnectionErrorBanner(
                    onRetry: () => ref.refresh(homeProvider),
                  );
                }
                return Center(child: Text('$e', style: TextStyle(color: fs.error)));
              },
              loading: () => const Center(child: CircularProgressIndicator()),
              data: (h) => RefreshIndicator(
                onRefresh: () async => ref.refresh(homeProvider.future),
                child: ListView(children: [
                  _albumsRow(context, 'Recently added',  h.recentlyAddedAlbums),
                  _albumsRow(context, 'Rediscover',      h.rediscoverAlbums),
                  _artistsRow(context, 'Rediscover artists', h.rediscoverArtists),
                  _tracksRow(context, ref, 'Most played', h.mostPlayedTracks),
                  _artistsRow(context, 'Last played artists', h.lastPlayedArtists),
                  const SizedBox(height: 96),
                ]),
              ),
            ),
      ),
    );
  }

  Widget _albumsRow(BuildContext ctx, String title, List<AlbumRef> albums) =>
      HorizontalScrollRow(
        title: title,
        children: [
          for (final a in albums)
            AlbumCard(album: a, onTap: () => ctx.push('/albums/${a.id}')),
        ],
      );

  Widget _artistsRow(BuildContext ctx, String title, List<ArtistRef> artists) =>
      HorizontalScrollRow(
        title: title,
        children: [
          for (final a in artists)
            ArtistCard(artist: a, onTap: () => ctx.push('/artists/${a.id}')),
        ],
      );

  Widget _tracksRow(BuildContext ctx, WidgetRef ref, String title, List<TrackRef> tracks) =>
      HorizontalScrollRow(
        title: title,
        height: 64,
        children: [
          for (final t in tracks)
            SizedBox(
              width: 280,
              child: TrackRow(
                track: t,
                onTap: () => ref.read(playerActionsProvider).playTracks([t]),
              ),
            ),
        ],
      );
}