import 'package:flutter/cupertino.dart';
import 'package:flutter/services.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:please_pay_me/theme/tokens.dart';

/// Inter is the closest cross-platform stand-in for SF Pro, so the catalog
/// looks the same on Windows/web as it does on device.
TextStyle _sf(TextStyle style, {Color? color}) {
  return GoogleFonts.inter(textStyle: style, color: color);
}

CupertinoTextThemeData _textTheme() {
  return CupertinoTextThemeData(
    primaryColor: AppColors.accent,
    textStyle: _sf(AppTypography.body, color: AppColors.label),
    actionTextStyle: _sf(AppTypography.body, color: AppColors.accent),
    tabLabelTextStyle: _sf(AppTypography.caption2, color: AppColors.secondaryLabel),
    navTitleTextStyle: _sf(AppTypography.headline, color: AppColors.label),
    navLargeTitleTextStyle: _sf(AppTypography.largeTitle, color: AppColors.label),
    navActionTextStyle: _sf(AppTypography.body, color: AppColors.accent),
  );
}

CupertinoThemeData buildLightTheme() => _buildTheme(Brightness.light);

CupertinoThemeData buildDarkTheme() => _buildTheme(Brightness.dark);

CupertinoThemeData _buildTheme(Brightness brightness) {
  return CupertinoThemeData(
    brightness: brightness,
    primaryColor: AppColors.accent,
    primaryContrastingColor: const Color(0xFFFFFFFF),
    scaffoldBackgroundColor: AppColors.groupedBackground,
    barBackgroundColor: AppColors.barBackground,
    applyThemeToAll: true,
    textTheme: _textTheme(),
  );
}

/// Android system bars. Dark uses transparent black so the 3-button / gesture
/// bar does not get a gray contrast scrim over the tab bar.
SystemUiOverlayStyle systemUiOverlayFor(Brightness brightness) {
  final dark = brightness == Brightness.dark;
  return SystemUiOverlayStyle(
    statusBarColor: const Color(0x00000000),
    statusBarBrightness: brightness,
    statusBarIconBrightness: dark ? Brightness.light : Brightness.dark,
    systemNavigationBarColor: dark ? const Color(0x00000000) : const Color(0x00FFFFFF),
    systemNavigationBarDividerColor: const Color(0x00000000),
    systemNavigationBarIconBrightness: dark ? Brightness.light : Brightness.dark,
    systemNavigationBarContrastEnforced: false,
  );
}