import 'dart:io';

import 'package:drift/native.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:melo/library/database.dart';
import 'package:melo/library/scan_service.dart';
import 'package:path/path.dart' as p;

void main() {
  final fixtures = p.join(Directory.current.path, 'test', 'fixtures', 'audio');
  late MeloDb db;
  late Directory coverDir;

  setUp(() async {
    db = MeloDb(NativeDatabase.memory());
    coverDir = await Directory.systemTemp.createTemp('melo_covers');
  });
  tearDown(() async {
    await db.close();
    await coverDir.delete(recursive: true);
  });

  test('scanFolders liest Tags aus den Test-mp3s', () async {
    final count = await scanFolders(db, [fixtures], coverDir: coverDir);
    expect(count, 3);
    final songs = await db.watchSongs().first;
    expect(
      songs.map((s) => s.title).toSet(),
      {'Nachtpuls', 'Taglicht', 'Herzschlag'},
    );
    final nacht = songs.firstWhere((s) => s.title == 'Nachtpuls');
    expect(nacht.artist, 'Rotklang');
    expect(nacht.album, 'Schwarz');
    expect(nacht.durationMs, greaterThan(0));
  });

  test('extrahiert eingebettetes Cover als Datei', () async {
    await scanFolders(db, [fixtures], coverDir: coverDir);
    final songs = await db.watchSongs().first;
    final withCover = songs.where((s) => s.coverPath != null).toList();
    // Nur "Nachtpuls" hat ein eingebettetes Cover.
    expect(withCover.length, 1);
    expect(withCover.first.title, 'Nachtpuls');
    expect(File(withCover.first.coverPath!).existsSync(), isTrue);
  });

  test('Re-Scan behält die UUID (sync-stabil)', () async {
    await scanFolders(db, [fixtures], coverDir: coverDir);
    final firstIds = {
      for (final s in await db.watchSongs().first) s.path: s.id
    };
    await scanFolders(db, [fixtures], coverDir: coverDir);
    final secondIds = {
      for (final s in await db.watchSongs().first) s.path: s.id
    };
    expect(secondIds, firstIds);
    expect((await db.watchSongs().first).length, 3); // keine Duplikate
  });
}