import "package:flutter/material.dart";

import "package:smol_mail/presentation/theme/app_colors.dart";

const _seedColor = Color.fromRGBO(63, 207, 142, 1);
const _darkSurface = Color.fromRGBO(1, 17, 29, 1);

TextTheme _textTheme(TextTheme base, Color mutedColor) {
  return base.copyWith(
    bodySmall: base.bodySmall?.copyWith(
      fontFamily: "Inter",
      fontSize: 16,
      fontWeight: FontWeight.normal,
    ),
    bodyMedium: base.bodyMedium?.copyWith(
      fontFamily: "Inter",
      fontSize: 20,
      fontWeight: FontWeight.w500,
    ),
    bodyLarge: base.bodyLarge?.copyWith(
      fontFamily: "Inter",
      fontSize: 24,
      fontWeight: FontWeight.bold,
    ),
    titleMedium: base.titleMedium?.copyWith(
      fontSize: 14,
      fontWeight: FontWeight.w300,
    ),
    titleLarge: base.titleLarge?.copyWith(
      fontFamily: "Inter",
      fontSize: 35,
      fontWeight: FontWeight.w900,
    ),
    labelSmall: base.labelSmall?.copyWith(
      fontFamily: "Inter",
      fontSize: 16,
      color: mutedColor,
      fontWeight: FontWeight.w700,
    ),
  );
}

ThemeData _buildTheme(ColorScheme scheme, AppColors appColors) {
  return ThemeData(
    colorScheme: scheme,
    // ThemeData defaults this legacy field to Colors.grey[900] on a dark
    // theme when unset, which is nearly invisible against our dark surfaces —
    // several screens still read it via Theme.of(context).primaryColor.
    primaryColor: scheme.primary,
    scaffoldBackgroundColor: scheme.surface,
    extensions: [appColors],
    appBarTheme: AppBarTheme(
      backgroundColor: scheme.surface,
      iconTheme: IconThemeData(color: scheme.onSurface, size: 30),
      titleTextStyle: TextStyle(
        color: scheme.onSurface,
        fontFamily: "Inter",
        fontWeight: FontWeight.w900,
        fontSize: 30,
      ),
      elevation: 0.0,
    ),
    textTheme: _textTheme(
      ThemeData(brightness: scheme.brightness).textTheme,
      scheme.onSurfaceVariant,
    ),
    snackBarTheme: SnackBarThemeData(
      backgroundColor: scheme.inverseSurface,
      contentTextStyle: TextStyle(
        fontFamily: "Inter",
        fontSize: 16,
        color: scheme.onInverseSurface,
      ),
    ),
    elevatedButtonTheme: ElevatedButtonThemeData(
      style: ElevatedButton.styleFrom(
        backgroundColor: scheme.primary,
        foregroundColor: scheme.onPrimary,
        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(5)),
        textStyle: const TextStyle(
          fontFamily: "Inter",
          fontSize: 17,
          fontWeight: FontWeight.w500,
        ),
      ),
    ),
    textButtonTheme: TextButtonThemeData(
      style: TextButton.styleFrom(
        foregroundColor: scheme.primary,
        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(5)),
        textStyle: const TextStyle(
          fontFamily: "Inter",
          fontWeight: FontWeight.w500,
          fontSize: 17,
        ),
      ),
    ),
    // Without this, an empty/unfocused field's resting label inherits
    // bodyLarge (24px bold) — that's what made "Host" etc. look huge.
    inputDecorationTheme: InputDecorationTheme(
      labelStyle: TextStyle(
        fontFamily: "Inter",
        fontSize: 16,
        fontWeight: FontWeight.normal,
        color: scheme.onSurfaceVariant,
      ),
      floatingLabelStyle: TextStyle(
        fontFamily: "Inter",
        fontSize: 14,
        fontWeight: FontWeight.w500,
        color: scheme.primary,
      ),
      hintStyle: TextStyle(
        fontFamily: "Inter",
        fontSize: 16,
        fontWeight: FontWeight.normal,
        color: scheme.onSurfaceVariant,
      ),
      border: OutlineInputBorder(
        borderRadius: BorderRadius.circular(8),
        borderSide: BorderSide.none,
      ),
      contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 14),
    ),
    useMaterial3: true,
  );
}

final ThemeData appThemeDark = _buildTheme(
  ColorScheme.fromSeed(
    seedColor: _seedColor,
    brightness: Brightness.dark,
  ).copyWith(surface: _darkSurface),
  AppColors.dark,
);

final ThemeData appThemeLight = _buildTheme(
  ColorScheme.fromSeed(
    seedColor: _seedColor,
    brightness: Brightness.light,
  ),
  AppColors.light,
);