// Author: fruit.com.cn

import 'dart:math';

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:fruitshorts/core/theme/app_colors.dart';
import 'package:fruitshorts/core/theme/app_theme.dart';

double _contrast(Color foreground, Color background) {
  final first = foreground.computeLuminance();
  final second = background.computeLuminance();
  return (max(first, second) + 0.05) / (min(first, second) + 0.05);
}

void main() {
  test('should_expose_approved_klein_blue_tokens', () {
    expect(AppColors.blue, const Color(0xFF002FA7));
    expect(AppColors.bluePressed, const Color(0xFF00227A));
    expect(AppColors.blueSoft, const Color(0xFF5B7BE0));
    expect(AppColors.onPrimary, const Color(0xFFFFFFFF));
  });

  test('should_meet_text_and_icon_contrast_when_using_theme_tokens', () {
    expect(
      _contrast(AppColors.onPrimary, AppColors.blue),
      greaterThanOrEqualTo(4.5),
    );
    expect(_contrast(AppColors.blue, Colors.white), greaterThanOrEqualTo(4.5));
    expect(
      _contrast(AppColors.blueSoft, AppColors.ink),
      greaterThanOrEqualTo(3),
    );
  });

  test('should_use_klein_blue_in_light_and_dark_color_schemes', () {
    for (final theme in [AppTheme.light(), AppTheme.dark()]) {
      expect(theme.colorScheme.primary, AppColors.blue);
      expect(theme.colorScheme.onPrimary, AppColors.onPrimary);
    }
  });

  testWidgets('should_expose_klein_blue_through_widget_theme', (tester) async {
    late ThemeData applied;
    await tester.pumpWidget(
      MaterialApp(
        theme: AppTheme.dark(),
        home: Builder(
          builder: (context) {
            applied = Theme.of(context);
            return const SizedBox.shrink();
          },
        ),
      ),
    );

    expect(applied.colorScheme.primary, AppColors.blue);
    expect(applied.colorScheme.onPrimary, AppColors.onPrimary);
  });
}