import 'package:flutter/material.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:lucide_icons_flutter/lucide_icons.dart';

/// KROW brand palette: 286CP blue carries every surface and action, 106CP
/// yellow marks money and anything waiting on you, and the canvas is white.
///
/// 621CP sage is still here, but it is a tint now rather than the ground: it
/// fills the quiet inset blocks that would otherwise vanish against a white
/// card.
abstract final class KrowPalette {
  static const blue = Color(0xFF3752A8);
  static const blueDeep = Color(0xFF22366F);
  static const blueTint = Color(0xFFE1E6F4);
  static const yellow = Color(0xFFF5C842);
  static const yellowSoft = Color(0xFFF7E4AE);
  static const sage = Color(0xFFE9F3EC);
  static const ink = Color(0xFF26353E);
  static const line = Color(0xFFCFDDD3);
  static const mute = Color(0xFF65727A);

  /// Inert surfaces: a disabled button, an un-dragged swipe track.
  ///
  /// Cool grey rather than the green-grey these used to be. That tint made
  /// sense while sage was the canvas and a disabled control was a slightly
  /// darker patch of the page; against white it reads as a colour someone
  /// chose, which is the last thing an inert control should look like.
  static const disabled = Color(0xFFDFE3E6);

  /// The outline on an unselected control — an empty radio, an OTP box.
  /// Heavier than [line], which is only ever a hairline between rows.
  static const edge = Color(0xFFC8D0D6);
}

ThemeData buildKrowTheme() {
  final scheme = ColorScheme.fromSeed(
    seedColor: KrowPalette.blue,
    primary: KrowPalette.blue,
    onPrimary: Colors.white,
    secondary: KrowPalette.yellow,
    onSecondary: KrowPalette.ink,
    surface: Colors.white,
    onSurface: KrowPalette.ink,
    brightness: Brightness.light,
  );

  final text = GoogleFonts.poppinsTextTheme().apply(
    bodyColor: KrowPalette.ink,
    displayColor: KrowPalette.ink,
  );

  return ThemeData(
    useMaterial3: true,
    colorScheme: scheme,
    textTheme: text,
    scaffoldBackgroundColor: Colors.white,
    appBarTheme: AppBarTheme(
      backgroundColor: Colors.white,
      surfaceTintColor: Colors.transparent,
      foregroundColor: KrowPalette.ink,
      elevation: 0,
      centerTitle: false,
      titleTextStyle: GoogleFonts.poppins(
        fontSize: 18,
        fontWeight: FontWeight.w700,
        color: KrowPalette.ink,
      ),
    ),
    cardTheme: CardThemeData(
      color: Colors.white,
      elevation: 0,
      margin: EdgeInsets.zero,
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(16),
        side: const BorderSide(color: KrowPalette.line),
      ),
    ),
    // Most detail screens use a plain AppBar, whose back button would
    // otherwise draw Material's own glyph — a full arrow on Android and web,
    // a chevron on iOS. Naming it here keeps every back button in the app the
    // same shape as the ones built by hand with HeaderIconButton.
    actionIconTheme: ActionIconThemeData(
      backButtonIconBuilder: (context) =>
          const Icon(LucideIcons.chevronLeft, size: 20),
    ),
    dividerTheme: const DividerThemeData(
      color: KrowPalette.line,
      thickness: 1,
      space: 1,
    ),
    filledButtonTheme: FilledButtonThemeData(
      style: FilledButton.styleFrom(
        minimumSize: const Size.fromHeight(52),
        backgroundColor: KrowPalette.blue,
        foregroundColor: Colors.white,
        disabledBackgroundColor: KrowPalette.disabled,
        disabledForegroundColor: const Color(0xFF949FA5),
        textStyle: GoogleFonts.poppins(
          fontSize: 15,
          fontWeight: FontWeight.w600,
        ),
        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(14)),
      ),
    ),
    outlinedButtonTheme: OutlinedButtonThemeData(
      style: OutlinedButton.styleFrom(
        minimumSize: const Size.fromHeight(52),
        foregroundColor: KrowPalette.ink,
        backgroundColor: Colors.white,
        side: const BorderSide(color: KrowPalette.line),
        textStyle: GoogleFonts.poppins(
          fontSize: 15,
          fontWeight: FontWeight.w600,
        ),
        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(14)),
      ),
    ),
    textButtonTheme: TextButtonThemeData(
      style: TextButton.styleFrom(
        foregroundColor: KrowPalette.blue,
        textStyle: GoogleFonts.poppins(
          fontSize: 14,
          fontWeight: FontWeight.w600,
        ),
      ),
    ),
    inputDecorationTheme: InputDecorationTheme(
      filled: true,
      fillColor: Colors.white,
      contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 16),
      hintStyle: GoogleFonts.poppins(
        fontSize: 14,
        color: const Color(0xFF949FA5),
      ),
      border: OutlineInputBorder(
        borderRadius: BorderRadius.circular(14),
        borderSide: const BorderSide(color: KrowPalette.line),
      ),
      enabledBorder: OutlineInputBorder(
        borderRadius: BorderRadius.circular(14),
        borderSide: const BorderSide(color: KrowPalette.line),
      ),
      focusedBorder: OutlineInputBorder(
        borderRadius: BorderRadius.circular(14),
        borderSide: const BorderSide(color: KrowPalette.blue, width: 1.6),
      ),
    ),
    chipTheme: ChipThemeData(
      backgroundColor: Colors.white,
      side: const BorderSide(color: KrowPalette.line),
      labelStyle: GoogleFonts.poppins(
        fontSize: 12.5,
        fontWeight: FontWeight.w500,
      ),
      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(10)),
    ),
    // Bottom navigation is KrowNavBar, not Material's NavigationBar, so there
    // is no navigationBarTheme to configure — its styling lives in the widget.
    snackBarTheme: SnackBarThemeData(
      behavior: SnackBarBehavior.floating,
      backgroundColor: KrowPalette.ink,
      contentTextStyle: GoogleFonts.poppins(
        fontSize: 13.5,
        color: Colors.white,
      ),
      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
    ),
  );
}