import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:fruitshorts/core/data/models/drama.dart';
import 'package:fruitshorts/pages/discover/discover_logic.dart';
import 'package:fruitshorts/pages/home/home_logic.dart';
import 'package:fruitshorts/pages/mine/mine_logic.dart';

Drama _drama(String id) => Drama(
  id: id,
  title: id,
  synopsis: 'synopsis',
  posterUrl: '/files/poster.png',
  episodes: const [],
);

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  final dramas = [_drama('signal'), _drama('city')];

  test(
    'should_make_first_catalog_entry_the_current_drama_when_catalog_loads',
    () {
      final logic = HomeLogic(dramas);

      expect(logic.currentDrama.id, 'signal');
      expect(logic.tab, 0);
      expect(logic.mySection, 0);
      expect(logic.drawerOpen, isFalse);
      expect(logic.profile, isFalse);
      expect(logic.videoImmersive, isFalse);
      logic.dispose();
    },
  );

  test('should_not_build_shell_when_catalog_is_empty', () {
    expect(() => HomeLogic(const []), throwsStateError);
  });

  test('should_not_raise_request_counter_when_only_tab_switches', () {
    final logic = HomeLogic(dramas);
    var notifications = 0;
    logic.addListener(() => notifications++);

    logic.select(1);

    expect(logic.tab, 1);
    expect(logic.searchRequest, 0);
    expect(logic.sectionRequest, 0);
    expect(logic.resumeRequest, 0);
    expect(logic.backRequest, 0);
    expect(notifications, 1);
    logic.dispose();
  });

  test('should_raise_only_its_own_counter_when_each_select_flag_is_used', () {
    final logic = HomeLogic(dramas);

    logic.select(1, search: true);
    expect(logic.tab, 1);
    expect(logic.searchRequest, 1);
    expect(logic.sectionRequest, 0);

    logic.select(2, mySection: 0);
    expect(logic.mySection, 0);
    expect(logic.sectionRequest, 1);
    expect(logic.searchRequest, 1);

    logic.select(0, resume: true);
    expect(logic.resumeRequest, 1);
    expect(logic.sectionRequest, 1);

    expect(logic.backRequest, 0);
    logic.dispose();
  });

  test('should_default_to_second_section_when_watchlist_shortcut_is_used', () {
    final logic = HomeLogic(dramas);

    logic.select(2, watchlist: true);

    expect(logic.tab, 2);
    expect(logic.mySection, 1);
    expect(logic.sectionRequest, 1);
    logic.dispose();
  });

  test(
    'should_differ_on_profile_flag_when_open_profile_and_open_library_are_used',
    () {
      final logic = HomeLogic(dramas);

      logic.openProfile();
      expect(logic.profile, isTrue);
      expect(logic.tab, 2);
      expect(logic.mySection, 0);
      expect(logic.sectionRequest, 1);

      logic.openLibrary(section: 1);
      expect(logic.profile, isFalse);
      expect(logic.mySection, 1);
      expect(logic.sectionRequest, 2);

      logic.openLibrary();
      expect(logic.profile, isFalse);
      expect(logic.mySection, 1);
      expect(logic.sectionRequest, 3);
      logic.dispose();
    },
  );

  test('should_return_to_discover_and_handle_immersive_back', () {
    final logic = HomeLogic(dramas);

    // Home is the launch tab; the first back press lands on Discover.
    logic.onSystemBack();
    expect(logic.tab, 1);
    logic.onSystemBack();
    expect(logic.tab, 1);
    expect(logic.backRequest, 0);

    logic.select(0);
    logic.onSystemBack();
    expect(logic.tab, 1);
    expect(logic.backRequest, 0);

    logic.select(0);
    logic.onImmersiveChanged(true);
    logic.onSystemBack();
    expect(logic.backRequest, 1);
    expect(logic.tab, 0);

    logic.onImmersiveChanged(false);
    logic.onSystemBack();
    expect(logic.tab, 1);
    logic.dispose();
  });

  test('should_notify_only_on_actual_change_when_menu_state_is_set', () {
    final logic = HomeLogic(dramas);
    var notifications = 0;
    logic.addListener(() => notifications++);

    logic.setMenuOpen(false);
    expect(notifications, 0);

    logic.setMenuOpen(true);
    expect(logic.drawerOpen, isTrue);
    expect(notifications, 1);

    logic.setMenuOpen(true);
    expect(notifications, 1);
    logic.dispose();
  });

  test('should_update_state_when_drama_and_immersive_callbacks_fire', () {
    final logic = HomeLogic(dramas);

    logic.onDramaChanged(dramas[1]);
    expect(logic.currentDrama.id, 'city');

    logic.onImmersiveChanged(true);
    expect(logic.videoImmersive, isTrue);
    logic.dispose();
  });

  test('should_map_onto_root_tabs_when_my_page_actions_fire', () {
    final logic = HomeLogic(dramas);

    logic.myAction(MyPageAction.discover);
    expect(logic.tab, 1);
    expect(logic.searchRequest, 1);

    logic.myAction(MyPageAction.resume);
    expect(logic.tab, 0);
    expect(logic.resumeRequest, 1);

    logic.myAction(MyPageAction.home);
    expect(logic.tab, 0);
    expect(logic.resumeRequest, 1);
    logic.dispose();
  });

  test('should_do_nothing_when_notifying_after_dispose', () {
    final logic = HomeLogic(dramas);
    var notifications = 0;
    logic.addListener(() => notifications++);

    logic.dispose();
    logic.notify();

    expect(notifications, 0);
  });

  testWidgets('should_map_onto_root_tabs_when_discover_actions_fire', (
    tester,
  ) async {
    final logic = HomeLogic(dramas);
    late BuildContext context;
    await tester.pumpWidget(
      MaterialApp(
        home: Builder(
          builder: (inner) {
            context = inner;
            return const SizedBox.shrink();
          },
        ),
      ),
    );

    logic.discoverAction(context, DiscoverPageAction.watchlist);
    expect(logic.tab, 2);
    expect(logic.profile, isFalse);
    expect(logic.mySection, 1);
    expect(logic.sectionRequest, 1);

    logic.discoverAction(context, DiscoverPageAction.my);
    expect(logic.tab, 2);
    expect(logic.profile, isFalse);

    logic.discoverAction(context, DiscoverPageAction.resume);
    expect(logic.tab, 0);
    expect(logic.resumeRequest, 1);

    logic.discoverAction(context, DiscoverPageAction.home);
    expect(logic.tab, 0);

    expect(tester.takeException(), isNull);
    logic.dispose();
  });
}