import 'package:flutter_test/flutter_test.dart';
import 'package:flutter/material.dart';
import 'package:kouyu_english/core/app_state.dart';
import 'package:kouyu_english/core/models.dart';
import 'package:kouyu_english/features/lesson/lesson_flow.dart';
import 'package:kouyu_english/main.dart';
import 'package:shared_preferences/shared_preferences.dart';

void main() {
  testWidgets('shows the M1 welcome flow', (tester) async {
    SharedPreferences.setMockInitialValues({});
    await tester.pumpWidget(const KouyuEnglishApp());
    await tester.pumpAndSettle();

    expect(find.text('每天 20 分钟，\n说出能用的英语。'), findsOneWidget);
    expect(find.text('继续'), findsOneWidget);

    await tester.tap(find.text('继续'));
    await tester.pumpAndSettle();

    expect(find.text('从哪里开始？'), findsOneWidget);
    expect(find.text('直接从第一课开始'), findsOneWidget);
  });

  testWidgets('writing input updates the lesson draft and enables checking', (
    tester,
  ) async {
    final state = AppState()..lessonStep = LessonStep.writing;
    await tester.pumpWidget(
      MaterialApp(
        home: LessonFlow(state: state, onOpenDialogue: () {}, onFinish: () {}),
      ),
    );

    await tester.enterText(find.byType(TextField), 'Hello. I am Shen.');
    await tester.pump();

    expect(state.lessonWritingDraft, 'Hello. I am Shen.');
    final check = tester.widget<FilledButton>(
      find.widgetWithText(FilledButton, '检查句子'),
    );
    expect(check.onPressed, isNotNull);
  });

  testWidgets('speaking step displays use mic and play repeat buttons', (
    tester,
  ) async {
    final state = AppState()..lessonStep = LessonStep.speaking;
    await tester.pumpWidget(
      MaterialApp(
        home: LessonFlow(state: state, onOpenDialogue: () {}, onFinish: () {}),
      ),
    );

    expect(find.text('跟读'), findsOneWidget);
    expect(find.text('使用麦克风跟读'), findsOneWidget);
    expect(find.text('播放跟读'), findsOneWidget);
  });
}