import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

/// NetDesk design tokens + [ThemeData].
///
/// A single, dark, premium theme in the spirit of TeamViewer / RustDesk —
/// deep near-black surfaces, a confident green accent, generous spacing and
/// softly rounded cards. All colors live here as tokens so the rest of the
/// app never hardcodes a hex value.
class NetDeskColors {
  NetDeskColors._();

  /// App background — deep, near-black with a cool blue cast.
  static const Color background = Color(0xFF0B0F15);

  /// Raised surface (cards, panels) — one step lighter than the background.
  static const Color surface = Color(0xFF121821);

  /// A second elevation used for inputs / inset wells.
  static const Color surfaceAlt = Color(0xFF0E141C);

  /// Hairline borders and dividers.
  static const Color border = Color(0xFF1E2733);

  /// Primary brand accent — a vivid, trustworthy green.
  static const Color accent = Color(0xFF22C55E);

  /// Darker accent for pressed / gradient ends.
  static const Color accentDeep = Color(0xFF16A34A);

  /// Soft accent glow used sparingly behind the wordmark.
  static const Color accentGlow = Color(0x3322C55E);

  /// High-emphasis text.
  static const Color textPrimary = Color(0xFFF2F5F9);

  /// Medium-emphasis text (subtitles, labels).
  static const Color textSecondary = Color(0xFF9AA7B8);

  /// Low-emphasis text (hints, captions).
  static const Color textMuted = Color(0xFF5E6B7D);

  /// Destructive / disconnect actions.
  static const Color danger = Color(0xFFEF4444);
}

class NetDeskRadius {
  NetDeskRadius._();
  static const double sm = 8;
  static const double md = 12;
  static const double lg = 16;
  static const double xl = 22;
}

class NetDeskSpacing {
  NetDeskSpacing._();
  static const double xs = 6;
  static const double sm = 10;
  static const double md = 16;
  static const double lg = 24;
  static const double xl = 36;
}

class NetDeskTheme {
  NetDeskTheme._();

  static ThemeData get dark {
    const scheme = ColorScheme.dark(
      primary: NetDeskColors.accent,
      onPrimary: Color(0xFF04210F),
      secondary: NetDeskColors.accentDeep,
      onSecondary: Color(0xFF04210F),
      surface: NetDeskColors.surface,
      onSurface: NetDeskColors.textPrimary,
      error: NetDeskColors.danger,
      onError: Colors.white,
      outline: NetDeskColors.border,
    );

    final base = ThemeData.dark(useMaterial3: true);

    return base.copyWith(
      colorScheme: scheme,
      scaffoldBackgroundColor: NetDeskColors.background,
      canvasColor: NetDeskColors.background,
      dividerColor: NetDeskColors.border,
      splashFactory: InkSparkle.splashFactory,

      textTheme: base.textTheme
          .apply(
            bodyColor: NetDeskColors.textPrimary,
            displayColor: NetDeskColors.textPrimary,
            fontFamily: 'Roboto',
          )
          .copyWith(
            bodyMedium: const TextStyle(
              color: NetDeskColors.textSecondary,
              height: 1.4,
            ),
            labelLarge: const TextStyle(
              fontWeight: FontWeight.w600,
              letterSpacing: 0.3,
            ),
          ),

      appBarTheme: const AppBarTheme(
        backgroundColor: NetDeskColors.surfaceAlt,
        foregroundColor: NetDeskColors.textPrimary,
        elevation: 0,
        centerTitle: false,
        titleTextStyle: TextStyle(
          color: NetDeskColors.textPrimary,
          fontSize: 16,
          fontWeight: FontWeight.w600,
          letterSpacing: 0.2,
        ),
        systemOverlayStyle: SystemUiOverlayStyle.light,
      ),

      cardTheme: CardThemeData(
        color: NetDeskColors.surface,
        elevation: 0,
        margin: EdgeInsets.zero,
        shape: RoundedRectangleBorder(
          side: const BorderSide(color: NetDeskColors.border),
          borderRadius: BorderRadius.circular(NetDeskRadius.xl),
        ),
      ),

      inputDecorationTheme: InputDecorationTheme(
        filled: true,
        fillColor: NetDeskColors.surfaceAlt,
        hintStyle: const TextStyle(color: NetDeskColors.textMuted),
        labelStyle: const TextStyle(color: NetDeskColors.textSecondary),
        contentPadding: const EdgeInsets.symmetric(
          horizontal: NetDeskSpacing.md,
          vertical: 18,
        ),
        enabledBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(NetDeskRadius.md),
          borderSide: const BorderSide(color: NetDeskColors.border),
        ),
        focusedBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(NetDeskRadius.md),
          borderSide: const BorderSide(color: NetDeskColors.accent, width: 1.6),
        ),
        errorBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(NetDeskRadius.md),
          borderSide: const BorderSide(color: NetDeskColors.danger),
        ),
      ),

      filledButtonTheme: FilledButtonThemeData(
        style: FilledButton.styleFrom(
          backgroundColor: NetDeskColors.accent,
          foregroundColor: const Color(0xFF04210F),
          disabledBackgroundColor: NetDeskColors.border,
          disabledForegroundColor: NetDeskColors.textMuted,
          minimumSize: const Size.fromHeight(54),
          textStyle: const TextStyle(
            fontSize: 15,
            fontWeight: FontWeight.w700,
            letterSpacing: 0.3,
          ),
          shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(NetDeskRadius.md),
          ),
        ),
      ),

      iconButtonTheme: IconButtonThemeData(
        style: IconButton.styleFrom(
          foregroundColor: NetDeskColors.textSecondary,
          hoverColor: NetDeskColors.surface,
          shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(NetDeskRadius.sm),
          ),
        ),
      ),

      tooltipTheme: const TooltipThemeData(
        decoration: BoxDecoration(
          color: Color(0xFF1B2430),
          borderRadius: BorderRadius.all(Radius.circular(NetDeskRadius.sm)),
        ),
        textStyle: TextStyle(color: NetDeskColors.textPrimary, fontSize: 12),
      ),

      dividerTheme: const DividerThemeData(
        color: NetDeskColors.border,
        thickness: 1,
        space: 1,
      ),
    );
  }
}