/// ErrorState widget 测试（UI-01 Task 3）。
///
/// 覆盖：错误图标 + 说明 + 重试按钮（主强调，与 EmptyState 区分）；
/// 重试回调触发。
library;

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:photo_live/app/theme.dart';
import 'package:photo_live/l10n/app_localizations.dart';
import 'package:photo_live/ui/components/error_state.dart';
import 'package:photo_live/ui/tokens.dart';

void main() {
  Future<void> pumpState(WidgetTester tester, VoidCallback onRetry) {
    return tester.pumpWidget(
      MaterialApp(
        theme: AppTheme.light,
        localizationsDelegates: AppLocalizations.localizationsDelegates,
        supportedLocales: AppLocalizations.supportedLocales,
        home: Scaffold(
          body: ErrorState(
            message: 'Network error. Please retry',
            onRetry: onRetry,
          ),
        ),
      ),
    );
  }

  testWidgets('渲染错误图标 + 说明 + 重试按钮，回调触发', (tester) async {
    var retries = 0;
    await pumpState(tester, () => retries++);

    expect(find.byIcon(Icons.cloud_off), findsOneWidget, reason: '错误语义图标');
    expect(find.text('Network error. Please retry'), findsOneWidget);
    final retryButton = find.widgetWithText(FilledButton, 'Retry');
    expect(retryButton, findsOneWidget, reason: '重试为主强调按钮');
    expect(find.byIcon(Icons.refresh), findsOneWidget);

    await tester.tap(retryButton);
    expect(retries, 1, reason: '重试回调触发');
  });

  testWidgets('深色主题错误图标用提亮变体', (tester) async {
    await tester.pumpWidget(
      MaterialApp(
        theme: AppTheme.dark,
        localizationsDelegates: AppLocalizations.localizationsDelegates,
        supportedLocales: AppLocalizations.supportedLocales,
        home: const Scaffold(
          body: ErrorState(message: 'boom', onRetry: _noop),
        ),
      ),
    );
    final icon = tester.widget<Icon>(find.byIcon(Icons.cloud_off));
    expect(icon.color, kColorErrorDark);
  });
}

void _noop() {}