import 'package:drift/drift.dart' show Value;
import 'package:drift/native.dart';
import 'package:flutter_test/flutter_test.dart';

import 'package:mews/application/controllers/reader_settings_controller.dart';
import 'package:mews/database/database.dart';
import 'package:mews/mews/document.dart';

void main() {
  late MewsDatabase db;

  setUp(() {
    db = MewsDatabase.test(NativeDatabase.memory());
  });

  tearDown(() async {
    await db.close();
  });

  test('settings round-trip through the database', () async {
    final settings = ReaderSettingsController(db);
    await settings.setFont('Atkinson Hyperlegible');
    await settings.increaseSize();
    await settings.setThemeMode('dark');
    await settings.setVariant('warm');

    final reloaded = ReaderSettingsController(db);
    await reloaded.load();
    expect(reloaded.font.value, 'Atkinson Hyperlegible');
    expect(reloaded.fontScale.value, 1.125);
    expect(reloaded.themeMode.value, 'dark');
    expect(reloaded.variant.value, 'warm');
  });

  test('text size stays within its limits', () async {
    final settings = ReaderSettingsController(db);
    for (var i = 0; i < 30; i++) {
      await settings.increaseSize();
    }
    expect(settings.fontScale.value, ReaderSettingsController.maxScale);
    for (var i = 0; i < 40; i++) {
      await settings.decreaseSize();
    }
    expect(settings.fontScale.value, ReaderSettingsController.minScale);
  });

  test('bookmarks toggle and persist', () async {
    final library = LibraryController(db);
    await library.load();
    await library.toggleBookmark('https://example.com/', 'Example');
    expect(library.isBookmarked('https://example.com/'), isTrue);

    final reloaded = LibraryController(db);
    await reloaded.load();
    expect(reloaded.isBookmarked('https://example.com/'), isTrue);

    await reloaded.toggleBookmark('https://example.com/', 'Example');
    expect(reloaded.isBookmarked('https://example.com/'), isFalse);
  });

  test('subscription refresh reports only unseen entries', () async {
    final library = LibraryController(db);
    await library.load();

    final firstPost = MewsEntry(
        url: 'https://example.com/a.html', date: DateTime(2026, 9, 21), title: 'First post');
    await library.toggleSubscription(
        'https://example.com/', 'Example', [firstPost]);
    expect(library.isSubscribed('https://example.com/'), isTrue);

    // Nothing new yet.
    await library.refreshSubscription(_page('https://example.com/', [firstPost]));
    expect(library.newEntries.value['https://example.com/'], isNull);

    // A new post appears.
    final newPost = MewsEntry(
        url: 'https://example.com/b.html', date: DateTime(2026, 10, 8), title: 'Second post');
    await library.refreshSubscription(_page('https://example.com/', [newPost, firstPost]));
    final fresh = library.newEntries.value['https://example.com/']!;
    expect(fresh, hasLength(1));
    expect(fresh.single.url, 'https://example.com/b.html');

    // The refresh stored it; a repeat refresh reports nothing.
    await library.refreshSubscription(_page('https://example.com/', [newPost, firstPost]));
    expect(library.newEntries.value['https://example.com/'], isNull);
  });

  test('caches pages for offline reopening', () async {
    await db.saveCachedPage(CachedPagesCompanion.insert(
      url: 'https://example.com/page.html',
      source: 'html',
      title: const Value('Page'),
      etag: const Value('"v1"'),
    ));
    final cached = await db.cachedPage('https://example.com/page.html');
    expect(cached!.source, 'html');
    expect(cached.etag, '"v1"');
    expect(cached.title, 'Page');
  });

  test('records history and returns the last visited page', () async {
    await db.recordVisit('https://a.example/', 'A');
    await db.recordVisit('https://b.example/', 'B');
    expect(await db.lastVisitedUrl(), 'https://b.example/');
  });
}

MewsPage _page(String url, List<MewsEntry> entries) => MewsPage(
      url: url,
      body: const [],
      lang: 'en',
      direction: TextDirection.ltr,
      variant: MewsVariant.plain,
      entries: entries,
      specVersion: '0.1',
    );