import 'package:flutter/material.dart';

// SigHej color palette — "Sunny Beach Day"
const _charcoalBlue = Color(0xFF264653); // dark surface / text
const _verdigris = Color(0xFF2A9D8F);    // primary (teal-green)
const _jasmine = Color(0xFFE9C46A);      // tertiary / accents
const _sandyBrown = Color(0xFFF4A261);   // secondary
const _burntPeach = Color(0xFFE76F51);   // error / CTA accent

ThemeData buildTheme({bool dark = false}) {
  final scheme = dark ? _darkScheme : _lightScheme;

  return ThemeData(
    colorScheme: scheme,
    useMaterial3: true,

    // Slightly rounded cards
    cardTheme: const CardThemeData(
      elevation: 2,
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.all(Radius.circular(16)),
      ),
    ),

    // Filled buttons use primary
    filledButtonTheme: FilledButtonThemeData(
      style: FilledButton.styleFrom(
        shape: const RoundedRectangleBorder(
          borderRadius: BorderRadius.all(Radius.circular(12)),
        ),
      ),
    ),

    // Chips use secondary container for selected state
    chipTheme: ChipThemeData(
      selectedColor: scheme.secondaryContainer,
      labelStyle: TextStyle(color: scheme.onSurface),
    ),
  );
}

const _lightScheme = ColorScheme(
  brightness: Brightness.light,
  // Primary — Verdigris
  primary: _verdigris,
  onPrimary: Colors.white,
  primaryContainer: Color(0xFFB2DFDB),
  onPrimaryContainer: _charcoalBlue,
  // Secondary — Sandy Brown
  secondary: _sandyBrown,
  onSecondary: Colors.white,
  secondaryContainer: Color(0xFFFFE0C8),
  onSecondaryContainer: _charcoalBlue,
  // Tertiary — Jasmine
  tertiary: _jasmine,
  onTertiary: _charcoalBlue,
  tertiaryContainer: Color(0xFFFFF3C4),
  onTertiaryContainer: _charcoalBlue,
  // Error — Burnt Peach
  error: _burntPeach,
  onError: Colors.white,
  errorContainer: Color(0xFFFFDAD6),
  onErrorContainer: Color(0xFF6B0000),
  // Surface — warm off-white
  surface: Color(0xFFFAF8F5),
  onSurface: _charcoalBlue,
  surfaceContainerHighest: Color(0xFFEDE9E3),
  onSurfaceVariant: Color(0xFF4A6572),
  outline: Color(0xFF8EA7B0),
  outlineVariant: Color(0xFFCDD8DC),
  shadow: Colors.black,
  scrim: Colors.black,
  inverseSurface: _charcoalBlue,
  onInverseSurface: Colors.white,
  inversePrimary: Color(0xFF80CBC4),
);

const _darkScheme = ColorScheme(
  brightness: Brightness.dark,
  primary: Color(0xFF80CBC4),
  onPrimary: Color(0xFF00363A),
  primaryContainer: _verdigris,
  onPrimaryContainer: Color(0xFFB2DFDB),
  secondary: Color(0xFFFFCC80),
  onSecondary: Color(0xFF3E2000),
  secondaryContainer: Color(0xFF7A3800),
  onSecondaryContainer: Color(0xFFFFDDB4),
  tertiary: _jasmine,
  onTertiary: Color(0xFF3C2800),
  tertiaryContainer: Color(0xFF564000),
  onTertiaryContainer: Color(0xFFFFF3C4),
  error: Color(0xFFFFB4AB),
  onError: Color(0xFF6B0000),
  errorContainer: _burntPeach,
  onErrorContainer: Colors.white,
  surface: Color(0xFF1A2A2E),       // deep Charcoal Blue derived
  onSurface: Color(0xFFE0EAED),
  surfaceContainerHighest: Color(0xFF263238),
  onSurfaceVariant: Color(0xFFB0C4CB),
  outline: Color(0xFF607D8B),
  outlineVariant: Color(0xFF37474F),
  shadow: Colors.black,
  scrim: Colors.black,
  inverseSurface: Color(0xFFE0EAED),
  onInverseSurface: _charcoalBlue,
  inversePrimary: _verdigris,
);