import 'package:drift/drift.dart';
import 'package:drift/native.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:melo/library/database.dart';

Future<void> _insertSong(MeloDb db, String id, {bool deleted = false}) {
  return db.into(db.songs).insert(SongsCompanion.insert(
        id: id,
        path: '/$id.mp3',
        title: id,
        dateAddedMs: 0,
        updatedAtMs: 0,
        deleted: Value(deleted),
      ));
}

Future<void> _play(MeloDb db, String songId, int playedAtMs) {
  return db.into(db.playbackHistory).insert(PlaybackHistoryCompanion.insert(
        songId: songId,
        positionMs: 0,
        playedAtMs: playedAtMs,
      ));
}

void main() {
  test('ein mehrfach gespielter Song erscheint nur einmal, an der Position '
      'seines jüngsten Abspielens', () async {
    final db = MeloDb(NativeDatabase.memory());
    await _insertSong(db, 'a');
    await _insertSong(db, 'b');
    await _play(db, 'a', 1000);
    await _play(db, 'b', 2000);
    await _play(db, 'a', 3000); // a erneut gespielt, jetzt jüngster Play

    final result = await db.watchRecentlyPlayed().first;

    expect(result.map((s) => s.id).toList(), ['a', 'b']);

    await db.close();
  });

  test('mehrere Songs erscheinen absteigend nach ihrem letzten Abspielen',
      () async {
    final db = MeloDb(NativeDatabase.memory());
    await _insertSong(db, 'a');
    await _insertSong(db, 'b');
    await _insertSong(db, 'c');
    await _play(db, 'a', 1000);
    await _play(db, 'b', 3000);
    await _play(db, 'c', 2000);

    final result = await db.watchRecentlyPlayed().first;

    expect(result.map((s) => s.id).toList(), ['b', 'c', 'a']);

    await db.close();
  });

  test('ein gelöschter Song mit Wiedergabe-Historie erscheint nicht',
      () async {
    final db = MeloDb(NativeDatabase.memory());
    await _insertSong(db, 'a', deleted: true);
    await _insertSong(db, 'b');
    await _play(db, 'a', 2000);
    await _play(db, 'b', 1000);

    final result = await db.watchRecentlyPlayed().first;

    expect(result.map((s) => s.id).toList(), ['b']);

    await db.close();
  });
}