import 'package:bible_tracker/data/bible.dart';
import 'package:bible_tracker/models/tracker.dart';
import 'package:bible_tracker/services/tracker_service.dart';
import 'package:bible_tracker/services/tracker_storage.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:shared_preferences/shared_preferences.dart';

Future<ProviderContainer> _container() async {
  SharedPreferences.setMockInitialValues(<String, Object>{});
  final prefs = await SharedPreferences.getInstance();
  return ProviderContainer(
    overrides: <Override>[sharedPreferencesProvider.overrideWithValue(prefs)],
  );
}

Future<List<Tracker>> _waitForData(ProviderContainer container) async {
  while (true) {
    final AsyncValue<List<Tracker>> state = container.read(
      trackerServiceProvider,
    );
    if (state.hasValue) return state.value!;
    await Future<void>.delayed(const Duration(milliseconds: 5));
  }
}

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  test('starts empty after initial load', () async {
    final container = await _container();
    addTearDown(container.dispose);
    final List<Tracker> data = await _waitForData(container);
    expect(data, isEmpty);
  });

  test('create adds a tracker with the given name and color', () async {
    final container = await _container();
    addTearDown(container.dispose);
    await _waitForData(container);

    final tracker = await container
        .read(trackerServiceProvider.notifier)
        .create(name: 'My Plan', color: const Color(0xFF123456));

    expect(tracker.name, 'My Plan');
    expect(tracker.colorValue, const Color(0xFF123456).toARGB32());
    expect(container.read(trackerServiceProvider).value, <Tracker>[tracker]);
  });

  test('toggleChapter adds and then removes chapter', () async {
    final container = await _container();
    addTearDown(container.dispose);
    await _waitForData(container);

    final service = container.read(trackerServiceProvider.notifier);
    final tracker = await service.create(
      name: 'Plan',
      color: const Color(0xFF000000),
    );

    await service.toggleChapter(tracker.id, 0, 1);
    Tracker current = container.read(trackerServiceProvider).value!.single;
    expect(current.readChapters, <String>{Bible.chapterKey(0, 1)});

    await service.toggleChapter(tracker.id, 0, 1);
    current = container.read(trackerServiceProvider).value!.single;
    expect(current.readChapters, isEmpty);
  });

  test('setBookRead marks all chapters of the book', () async {
    final container = await _container();
    addTearDown(container.dispose);
    await _waitForData(container);
    final service = container.read(trackerServiceProvider.notifier);
    final tracker = await service.create(
      name: 'Plan',
      color: const Color(0xFF000000),
    );

    await service.setBookRead(tracker.id, 0, read: true);
    final Tracker current = container
        .read(trackerServiceProvider)
        .value!
        .single;
    final Book genesis = Bible.books[0];
    expect(current.readChapters.length, genesis.chapterCount);
    for (int chapter = 1; chapter <= genesis.chapterCount; chapter++) {
      expect(current.readChapters.contains(Bible.chapterKey(0, chapter)), true);
    }
  });

  test('reset clears only the target tracker', () async {
    final container = await _container();
    addTearDown(container.dispose);
    await _waitForData(container);
    final service = container.read(trackerServiceProvider.notifier);
    final a = await service.create(name: 'A', color: const Color(0xFF111111));
    final b = await service.create(name: 'B', color: const Color(0xFF222222));
    await service.toggleChapter(a.id, 0, 1);
    await service.toggleChapter(b.id, 0, 1);

    await service.reset(a.id);

    final List<Tracker> current = container.read(trackerServiceProvider).value!;
    expect(
      current.firstWhere((Tracker t) => t.id == a.id).readChapters,
      isEmpty,
    );
    expect(
      current.firstWhere((Tracker t) => t.id == b.id).readChapters,
      <String>{Bible.chapterKey(0, 1)},
    );
  });

  test('delete removes the tracker', () async {
    final container = await _container();
    addTearDown(container.dispose);
    await _waitForData(container);
    final service = container.read(trackerServiceProvider.notifier);
    final a = await service.create(name: 'A', color: const Color(0xFF111111));
    await service.create(name: 'B', color: const Color(0xFF222222));

    await service.delete(a.id);
    final List<Tracker> current = container.read(trackerServiceProvider).value!;
    expect(current.length, 1);
    expect(current.single.name, 'B');
  });

  test('state is persisted across container instances', () async {
    SharedPreferences.setMockInitialValues(<String, Object>{});
    final prefs = await SharedPreferences.getInstance();

    final first = ProviderContainer(
      overrides: <Override>[sharedPreferencesProvider.overrideWithValue(prefs)],
    );
    await _waitForData(first);
    final created = await first
        .read(trackerServiceProvider.notifier)
        .create(name: 'Persisted', color: const Color(0xFFAABBCC));
    await first
        .read(trackerServiceProvider.notifier)
        .toggleChapter(created.id, 5, 3);
    first.dispose();

    final second = ProviderContainer(
      overrides: <Override>[sharedPreferencesProvider.overrideWithValue(prefs)],
    );
    addTearDown(second.dispose);
    final List<Tracker> loaded = await _waitForData(second);

    expect(loaded.length, 1);
    expect(loaded.single.name, 'Persisted');
    expect(loaded.single.readChapters, <String>{Bible.chapterKey(5, 3)});
  });

  test('updateMeta changes name and color', () async {
    final container = await _container();
    addTearDown(container.dispose);
    await _waitForData(container);
    final service = container.read(trackerServiceProvider.notifier);
    final tracker = await service.create(
      name: 'Old',
      color: const Color(0xFF111111),
    );

    await service.updateMeta(
      tracker.id,
      name: 'New',
      color: const Color(0xFF222222),
    );
    final Tracker current = container
        .read(trackerServiceProvider)
        .value!
        .single;
    expect(current.name, 'New');
    expect(current.colorValue, const Color(0xFF222222).toARGB32());
  });
}