import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';

import 'package:mobile/main.dart';

/// 在导航栏内按标签定位，避免和页面标题的相同文字混淆。
Finder navLabel(String label) {
  return find.descendant(
    of: find.byType(NavigationBar),
    matching: find.text(label),
  );
}

void main() {
  testWidgets('底部导航提供学习 / 管理 / 统计 / 账户四个入口', (WidgetTester tester) async {
    await tester.pumpWidget(const KiriMemoApp());

    expect(find.byType(NavigationBar), findsOneWidget);
    expect(find.byType(NavigationDestination), findsNWidgets(4));

    for (final String label in <String>['学习', '管理', '统计', '账户']) {
      expect(navLabel(label), findsOneWidget);
    }
  });

  testWidgets('默认停留在学习页，点击其它入口会切换', (WidgetTester tester) async {
    await tester.pumpWidget(const KiriMemoApp());

    NavigationBar bar = tester.widget<NavigationBar>(find.byType(NavigationBar));
    expect(bar.selectedIndex, 0);

    await tester.tap(navLabel('统计'));
    await tester.pumpAndSettle();

    bar = tester.widget<NavigationBar>(find.byType(NavigationBar));
    expect(bar.selectedIndex, 2);

    await tester.tap(navLabel('账户'));
    await tester.pumpAndSettle();

    bar = tester.widget<NavigationBar>(find.byType(NavigationBar));
    expect(bar.selectedIndex, 3);
  });

  testWidgets('学习首页展示今日任务与唯一主行动', (WidgetTester tester) async {
    await tester.pumpWidget(const KiriMemoApp());

    expect(find.text('今日计划'), findsOneWidget);
    expect(find.text('待复习'), findsOneWidget);
    expect(find.text('待新识'), findsOneWidget);
    expect(find.text('开始学习'), findsOneWidget);

    // 未接入内核的入口点击后要有反馈，不能静默无响应。
    await tester.tap(find.text('开始学习'));
    await tester.pump();
    await tester.pump(const Duration(milliseconds: 300));

    expect(find.text('学习会话 尚未接入内核'), findsOneWidget);
  });
}