import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:kouyu_english/core/app_state.dart';
import 'package:kouyu_english/core/courses/courses.dart';
import 'package:kouyu_english/features/shell/learning_shell.dart';
import 'package:shared_preferences/shared_preferences.dart';

/// The word bank is reachable from its own tab, but nothing on the 学习 tab
/// mentioned it, so a learner who opens the app to today's task never saw
/// that words were waiting. These cover the entry point, not the quiz.
void main() {
  setUp(() async {
    SharedPreferences.setMockInitialValues({});
    clearCoreItems();
    WordBank.instance.resetForTest();
    await WordBank.instance.load();
  });

  tearDown(() {
    clearCoreItems();
    WordBank.instance.resetForTest();
  });

  testWidgets('the 学习 tab offers a round of words and opens the word tab', (
    tester,
  ) async {
    final state = AppState()..finishOnboarding();
    await tester.pumpWidget(MaterialApp(home: LearningShell(state: state)));
    await tester.pumpAndSettle();

    expect(find.text('认词'), findsOneWidget);
    expect(find.text('今天还能学 15 个新词'), findsOneWidget);
    expect(find.text('15 个题，听到、看到能认出来就行，不用会说。'), findsOneWidget);

    await tester.tap(find.text('开始认词'));
    await tester.pumpAndSettle();

    expect(find.text('学过的词'), findsOneWidget);
  });

  testWidgets('the entry stays once the day is done, as a line not a task', (
    tester,
  ) async {
    final state = AppState()..finishOnboarding();
    for (final question in state.wordSession()) {
      state.recordWordRecognition(question.id, correct: true);
    }
    await tester.pumpWidget(MaterialApp(home: LearningShell(state: state)));
    await tester.pumpAndSettle();

    expect(state.wordSessionPreviewSize, 0);
    expect(find.text('开始认词'), findsNothing);
    expect(find.text('今天的新词学满 15 个了，明天继续'), findsOneWidget);
    expect(find.text('认识 15 · 熟悉 0'), findsOneWidget);

    await tester.tap(find.text('今天的新词学满 15 个了，明天继续'));
    await tester.pumpAndSettle();

    expect(find.text('学过的词'), findsOneWidget);
  });
}