// 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_obsidian_flare_brand_tokens', () {
    expect(AppColors.blue, const Color(0xFFFF5B3D));
    expect(AppColors.bluePressed, const Color(0xFFFF4321));
    expect(AppColors.blueSoft, const Color(0xFF9278EA));
    expect(AppColors.secondary, const Color(0xFF9278EA));
    expect(AppColors.gold, const Color(0xFFFBBF24));
    expect(AppColors.ink, const Color(0xFF0B0C10));
    expect(AppColors.card, const Color(0xFF16181F));
    expect(AppColors.raised, const Color(0xFF1D1E28));
    expect(AppColors.success, const Color(0xFF34D399));
    expect(AppColors.onPrimary, const Color(0xFFFFFFFF));
    expect(
      _contrast(AppColors.onGold, AppColors.gold),
      greaterThanOrEqualTo(4.5),
    );
  });

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

  test('should_use_flare_brand_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);
    }
  });

  test('should_define_non_white_outline_tokens_in_both_themes', () {
    final light = AppTheme.light().colorScheme;
    final dark = AppTheme.dark().colorScheme;

    expect(light.outline, AppColors.outlineLight);
    expect(light.outlineVariant, AppColors.outlineVariantLight);
    expect(dark.outline, AppColors.outlineDark);
    expect(dark.outlineVariant, AppColors.outlineVariantDark);
    expect(dark.outlineVariant.computeLuminance(), lessThan(0.2));
    expect(light.outlineVariant.computeLuminance(), lessThan(0.92));
  });

  testWidgets('should_expose_chili_brand_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);
  });
}