import 'package:drift/native.dart';
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:provider/provider.dart';
import 'package:melo/library/database.dart';
import 'package:melo/library/playlist_service.dart';
import 'package:melo/shared/favorite_button.dart';

/// Ein Titel, der nur am Server liegt, hat keine UUID in der Bibliothek.
/// Früher kam an dieser Stelle der leere String an: das Herz füllte sich,
/// in den Favoriten (INNER JOIN auf songs) tauchte aber nie etwas auf.
void main() {
  Future<void> pumpe(WidgetTester tester, MeloDb db, String songId) {
    return tester.pumpWidget(
      MultiProvider(
        providers: [
          Provider<MeloDb>.value(value: db),
          ChangeNotifierProvider<PlaylistService>.value(
              value: PlaylistService(db)),
        ],
        child: MaterialApp(
          home: Scaffold(body: FavoriteButton(songId: songId)),
        ),
      ),
    );
  }

  testWidgets('ohne Song-ID ist das Herz nicht bedienbar', (tester) async {
    final db = MeloDb(NativeDatabase.memory());
    await pumpe(tester, db, '');
    await tester.pumpAndSettle();

    final knopf = tester.widget<IconButton>(find.byType(IconButton));
    expect(knopf.onPressed, isNull);

    await tester.pumpWidget(const SizedBox());
    await tester.pump(const Duration(milliseconds: 1));
  });

  testWidgets('ohne Song-ID entsteht kein Favoriten-Eintrag', (tester) async {
    final db = MeloDb(NativeDatabase.memory());
    await pumpe(tester, db, '');
    await tester.pumpAndSettle();

    await tester.tap(find.byType(IconButton));
    await tester.pumpAndSettle();

    expect(await db.select(db.favorites).get(), isEmpty);

    await tester.pumpWidget(const SizedBox());
    await tester.pump(const Duration(milliseconds: 1));
  });

  testWidgets('mit Song-ID bleibt das Herz bedienbar', (tester) async {
    final db = MeloDb(NativeDatabase.memory());
    await db.into(db.songs).insert(SongsCompanion.insert(
          id: 'song-1',
          path: '/a.mp3',
          title: 'A',
          dateAddedMs: 0,
          updatedAtMs: 0,
        ));
    await pumpe(tester, db, 'song-1');
    await tester.pumpAndSettle();

    final knopf = tester.widget<IconButton>(find.byType(IconButton));
    expect(knopf.onPressed, isNotNull);

    await tester.pumpWidget(const SizedBox());
    await tester.pump(const Duration(milliseconds: 1));
  });
}