// Author: fruit.com.cn

import 'dart:math';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:fruitshorts/app.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_light_warm_orange_tokens', () {
    expect(AppColors.blue, const Color(0xFFFF7A1A));
    expect(AppColors.bluePressed, const Color(0xFFFF6A00));
    expect(AppColors.secondary, const Color(0xFFFF6A8A));
    expect(AppColors.ink, const Color(0xFFFFF8F0));
    expect(AppColors.surfaceTop, const Color(0xFFFFE9D6));
    expect(AppColors.card, const Color(0xFFFFFFFF));
    expect(AppColors.onSurface, const Color(0xFF1F1B16));
    expect(AppColors.muted, const Color(0xFF8C837B));
    expect(AppColors.subtle, const Color(0xFFB3AAA1));
    expect(AppColors.border, const Color(0xFFF0E4D6));
    expect(AppColors.badgePink, const Color(0xFFFFE3EC));
    expect(AppColors.badgePinkText, const Color(0xFFFF6A8A));
  });

  test('should_keep_primary_text_readable_on_warm_background', () {
    expect(
      _contrast(AppColors.onSurface, AppColors.ink),
      greaterThanOrEqualTo(4.5),
    );
    expect(_contrast(AppColors.muted, AppColors.card), greaterThanOrEqualTo(3));
  });

  test('should_use_light_color_scheme_and_dark_system_icons', () {
    final theme = AppTheme.light();

    expect(theme.brightness, Brightness.light);
    expect(theme.colorScheme.primary, AppColors.blue);
    expect(theme.colorScheme.onPrimary, AppColors.onPrimary);
    expect(theme.colorScheme.surface, AppColors.ink);
    expect(theme.colorScheme.onSurface, AppColors.onSurface);
    expect(theme.colorScheme.outline, AppColors.border);
    expect(theme.scaffoldBackgroundColor, AppColors.ink);
    expect(theme.appBarTheme.systemOverlayStyle, SystemUiOverlayStyle.dark);
  });

  test('should_use_ink_navigation_bar_without_contrast_scrim', () {
    expect(appSystemOverlayStyle.statusBarColor, Colors.transparent);
    expect(appSystemOverlayStyle.systemNavigationBarColor, AppColors.ink);
    expect(
      appSystemOverlayStyle.systemNavigationBarDividerColor,
      Colors.transparent,
    );
    expect(
      appSystemOverlayStyle.systemNavigationBarIconBrightness,
      Brightness.dark,
    );
    expect(appSystemOverlayStyle.systemNavigationBarContrastEnforced, isFalse);

    final sheetTheme = AppTheme.light().bottomSheetTheme;
    expect(sheetTheme.backgroundColor, Colors.transparent);
    expect(sheetTheme.modalBackgroundColor, Colors.transparent);
    expect(sheetTheme.surfaceTintColor, Colors.transparent);
  });

  test('should_expose_page_gradient_and_soft_card_shadow', () {
    expect(AppTheme.pageGradient.colors, [AppColors.surfaceTop, AppColors.ink]);
    expect(AppTheme.cardShadow.color, AppColors.cardShadow);
    expect(AppTheme.cardShadow.blurRadius, 18);
    expect(AppTheme.cardShadow.offset, const Offset(0, 6));
  });
}