// Author: fruit.com.cn

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_types.dart';
import 'package:fruitshorts/pages/home/home_logic.dart';
import 'package:fruitshorts/pages/mine/mine_types.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_current_when_catalog_loads', () {
    final logic = HomeLogic(dramas);

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

  test('should_allow_empty_catalog_for_startup_skeleton', () {
    final logic = HomeLogic(const []);
    expect(logic.currentDrama, isNull);
    logic.dispose();
  });

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

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

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

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

    logic.openProfile();

    expect(logic.tab, 4);
    logic.dispose();
  });

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

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

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

  testWidgets('should_defer_drama_notification_when_changed_during_build', (
    tester,
  ) async {
    final logic = HomeLogic(dramas);
    var notifications = 0;
    var immediateNotifications = -1;
    var changed = false;
    logic.addListener(() => notifications++);

    await tester.pumpWidget(
      MaterialApp(
        home: ListenableBuilder(
          listenable: logic,
          builder: (context, _) {
            if (!changed) {
              changed = true;
              logic.onDramaChanged(dramas[1]);
              immediateNotifications = notifications;
            }
            return const SizedBox.shrink();
          },
        ),
      ),
    );

    expect(immediateNotifications, 0);
    expect(tester.takeException(), isNull);
    expect(logic.currentDrama?.id, 'city');
    await tester.pump();
    expect(notifications, 1);
    expect(tester.takeException(), isNull);
    logic.dispose();
  });

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

    logic.myAction(MyPageAction.recommend);
    expect(logic.tab, 1);

    logic.myAction(MyPageAction.following);
    expect(logic.tab, 3);

    logic.openFollowingHistory();
    expect(logic.tab, 3);
    expect(logic.followingHistoryRequest, 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_map_onto_root_tabs_when_discover_actions_fire', () {
    final logic = HomeLogic(dramas);

    logic.discoverAction(DiscoverPageAction.mine);
    expect(logic.tab, 4);

    logic.discoverAction(DiscoverPageAction.following);
    expect(logic.tab, 3);

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