import 'dart:io';

import 'package:flutter_test/flutter_test.dart';
import 'package:jj_mkvmaker/app/settings.dart';
import 'package:jj_mkvmaker/app/sync/sync_diff.dart';
import 'package:jj_mkvmaker/core/rsync_filter.dart';
import 'package:path/path.dart' as p;

/// live_sync 를 나눈 SyncDiff 의 약속 (실제 폴더로): 보낼 것 · 지울 것 ("− ") · 거르기 · 개수 한도
void main() {
  late Directory tmp;
  setUp(() => tmp = Directory.systemTemp.createTempSync('jj_diff_'));
  tearDown(() => tmp.deleteSync(recursive: true));

  void put(String path, String text) => File(p.join(tmp.path, path))
    ..createSync(recursive: true)
    ..writeAsStringSync(text);

  test('약속 SyncDiff.of: 새 것 · 크기가 다른 것은 보낼 것, 지우기 포함이면 받는 쪽에만 있는 것은 "− ", 거른 것은 세지 않음', () async {
    put('src/new.txt', 'n');
    put('src/same.txt', 'same');
    put('src/changed.txt', 'longer');
    put('src/sub/a.log', 'skip');
    put('dst/same.txt', 'same');
    put('dst/changed.txt', 'x');
    put('dst/only.txt', 'gone');
    final now = DateTime.now();
    for (final f in ['src/same.txt', 'dst/same.txt']) {
      File(p.join(tmp.path, f)).setLastModifiedSync(now);
    }
    final pair = LiveSyncPair(p.join(tmp.path, 'src'), p.join(tmp.path, 'dst'));
    final send = await SyncDiff.of(pair, filter: RsyncFilter.parse('--exclude=*.log'));
    expect(send.toSet(), {'new.txt', 'changed.txt'}, reason: '같은 것 · 거른 것 (*.log) 은 빠지고, 지우기 없음');
    final mirror = await SyncDiff.of(pair.copyWith(delete: true));
    expect(mirror, contains('− only.txt'));
    expect(mirror, contains('sub/a.log'), reason: '거르기가 없으면 보낸다');
    expect((await SyncDiff.of(pair.copyWith(delete: true), limit: 1)).length, 1);
    expect(File(p.join(tmp.path, 'dst', 'only.txt')).existsSync(), isTrue, reason: '계산만 하고 바꾸지 않는다');
  });

  test('약속 SyncDiff.of: 원본이 없으면 빈 목록', () async {
    expect(await SyncDiff.of(LiveSyncPair(p.join(tmp.path, 'none'), p.join(tmp.path, 'dst'), delete: true)), isEmpty);
  });
}