import 'dart:async';

import 'package:flutter/material.dart';
import 'package:grouped_list/grouped_list.dart';
import 'package:ocarina/api/audio/audioplayer_service.dart';
import 'package:ocarina/api/login_manager.dart';
import 'package:ocarina/api/subsonic/artistindex.dart';
import 'package:ocarina/api/subsonic/subsonic.dart';
import 'package:ocarina/views/artist_view.dart';
import 'package:ocarina/views/login_view.dart';
import 'package:ocarina/widgets/image_cover.dart';
import 'package:responsive_sizer/responsive_sizer.dart';

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

  @override
  State<HomeView> createState() => _HomeViewState();
}

class _HomeViewState extends State<HomeView> {
  @override
  void initState() {
    super.initState();
    AudioPlayerService().setup();
    authenticate();
  }

  var _loading = true;
  final _artists = <ArtistIndex>[];

  Future<void> authenticate() async {
    if (!(await LoginManager.hasSavedLogin)) {
      if (!mounted) return;
      unawaited(
        Navigator.of(context).pushReplacement(
          MaterialPageRoute<void>(builder: (c) => const LoginView()),
        ),
      );
      return;
    }

    if (SubsonicApiService().user == "") {
      final details = await LoginManager.getDetails();
      if (details == null) {
        if (!mounted) return;
        unawaited(
          Navigator.of(context).pushReplacement(
            MaterialPageRoute<void>(builder: (c) => const LoginView()),
          ),
        );
        return;
      }
      SubsonicApiService().user = details["user"]!;
      SubsonicApiService().baseUrl = details["url"]!;
      SubsonicApiService().password = details["pass"]!;
      final r = await SubsonicApiService().verifyCredentials();
      if (!r) {
        if (!mounted) return;
        ScaffoldMessenger.of(context).clearSnackBars();
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(
            content: Text("Could not log in :("),
            duration: Duration(seconds: 3),
          ),
        );
        return;
      }
    }
    _artists
      ..clear()
      ..addAll(await SubsonicApiService().getArtistIndex() ?? []);
    _loading = false;
    setState(() {});
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Home"),
      ),
      body: Center(
        child: SingleChildScrollView(
          child: SizedBox(
            height: 100.h,
            width: 95.w,
            child: _loading
                ? const Column(
                    mainAxisAlignment: MainAxisAlignment.center,
                    children: [
                      CircularProgressIndicator.adaptive(),
                    ],
                  )
                : GroupedListView<ArtistIndex, String>(
                    elements: _artists,
                    groupBy: (a) => a.index,
                    groupHeaderBuilder: (index) => Text(
                      index.index,
                      style: TextStyle(
                        color: Theme.of(context).colorScheme.primary,
                      ),
                    ),
                    itemBuilder: (c, index) => Wrap(
                      alignment: (index.artists.length > 1)
                          ? WrapAlignment.spaceBetween
                          : WrapAlignment.start,
                      children: List<Widget>.generate(
                        index.artists.length,
                        (n) => InkWell(
                          onTap: () async {
                            await Navigator.of(context).push(
                              MaterialPageRoute<void>(
                                builder: (c) => ArtistView(
                                  artist: index.artists[n],
                                ),
                              ),
                            );
                          },
                          child: ImageCover(
                            imageUrl: index.artists[n].coverArt,
                            title: index.artists[n].name,
                            heroTag: index.artists[n].name,
                          ),
                        ),
                      ),
                    ),
                  ),
          ),
        ),
      ),
    );
  }
}