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

class AppColors {
  static const primary = Color(0xFF1A56DB);
  static const primaryLight = Color(0xFF3B82F6);
  static const primaryDark = Color(0xFF1E40AF);
  static const accent = Color(0xFF00C9A7);
  static const accentLight = Color(0xFF6EE7B7);
  static const background = Color(0xFFF8FAFC);
  static const surface = Colors.white;
  static const error = Color(0xFFEF4444);
  static const warning = Color(0xFFF59E0B);
  static const success = Color(0xFF10B981);
  static const textPrimary = Color(0xFF1E293B);
  static const textSecondary = Color(0xFF64748B);
  static const textTertiary = Color(0xFF94A3B8);
  static const divider = Color(0xFFE2E8F0);
  static const cardShadow = Color(0x1A000000);
  static const gradientStart = Color(0xFF1A56DB);
  static const gradientEnd = Color(0xFF00C9A7);
  static const chatUserBubble = Color(0xFF1A56DB);
  static const chatAiBubble = Color(0xFFF1F5F9);
  static const scanOverlay = Color(0x801A56DB);
}

class AppTheme {
  static ThemeData get lightTheme {
    return ThemeData(
      useMaterial3: true,
      brightness: Brightness.light,
      colorScheme: const ColorScheme.light(
        primary: AppColors.primary,
        onPrimary: Colors.white,
        secondary: AppColors.accent,
        onSecondary: Colors.white,
        surface: AppColors.surface,
        onSurface: AppColors.textPrimary,
        error: AppColors.error,
        onError: Colors.white,
        background: AppColors.background,
        onBackground: AppColors.textPrimary,
      ),
      scaffoldBackgroundColor: AppColors.background,
      textTheme: GoogleFonts.notoSansScTextTheme().copyWith(
        displayLarge: GoogleFonts.notoSansSc(
          fontSize: 32, fontWeight: FontWeight.bold, color: AppColors.textPrimary,
        ),
        displayMedium: GoogleFonts.notoSansSc(
          fontSize: 24, fontWeight: FontWeight.bold, color: AppColors.textPrimary,
        ),
        titleLarge: GoogleFonts.notoSansSc(
          fontSize: 20, fontWeight: FontWeight.w600, color: AppColors.textPrimary,
        ),
        titleMedium: GoogleFonts.notoSansSc(
          fontSize: 16, fontWeight: FontWeight.w600, color: AppColors.textPrimary,
        ),
        bodyLarge: GoogleFonts.notoSansSc(
          fontSize: 16, color: AppColors.textPrimary,
        ),
        bodyMedium: GoogleFonts.notoSansSc(
          fontSize: 14, color: AppColors.textSecondary,
        ),
        labelLarge: GoogleFonts.notoSansSc(
          fontSize: 14, fontWeight: FontWeight.w500,
        ),
      ),
      appBarTheme: AppBarTheme(
        elevation: 0,
        centerTitle: true,
        backgroundColor: AppColors.surface,
        foregroundColor: AppColors.textPrimary,
        systemOverlayStyle: SystemUiOverlayStyle.dark,
        titleTextStyle: GoogleFonts.notoSansSc(
          fontSize: 18, fontWeight: FontWeight.w600, color: AppColors.textPrimary,
        ),
      ),
      cardTheme: CardThemeData(
        elevation: 0,
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(16),
        ),
        color: AppColors.surface,
      ),
      inputDecorationTheme: InputDecorationTheme(
        filled: true,
        fillColor: AppColors.background,
        border: OutlineInputBorder(
          borderRadius: BorderRadius.circular(12),
          borderSide: BorderSide.none,
        ),
        enabledBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(12),
          borderSide: BorderSide.none,
        ),
        focusedBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(12),
          borderSide: const BorderSide(color: AppColors.primary, width: 1.5),
        ),
        errorBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(12),
          borderSide: const BorderSide(color: AppColors.error, width: 1),
        ),
        contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 14),
        hintStyle: GoogleFonts.notoSansSc(
          fontSize: 14, color: AppColors.textTertiary,
        ),
      ),
      elevatedButtonTheme: ElevatedButtonThemeData(
        style: ElevatedButton.styleFrom(
          elevation: 0,
          padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 14),
          shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(12),
          ),
          backgroundColor: AppColors.primary,
          foregroundColor: Colors.white,
          textStyle: GoogleFonts.notoSansSc(
            fontSize: 16, fontWeight: FontWeight.w600,
          ),
        ),
      ),
      outlinedButtonTheme: OutlinedButtonThemeData(
        style: OutlinedButton.styleFrom(
          padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 14),
          shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(12),
          ),
          side: const BorderSide(color: AppColors.primary),
          foregroundColor: AppColors.primary,
          textStyle: GoogleFonts.notoSansSc(
            fontSize: 14, fontWeight: FontWeight.w500,
          ),
        ),
      ),
      textButtonTheme: TextButtonThemeData(
        style: TextButton.styleFrom(
          foregroundColor: AppColors.primary,
          textStyle: GoogleFonts.notoSansSc(
            fontSize: 14, fontWeight: FontWeight.w500,
          ),
        ),
      ),
      floatingActionButtonTheme: const FloatingActionButtonThemeData(
        backgroundColor: AppColors.primary,
        foregroundColor: Colors.white,
        elevation: 4,
      ),
      bottomNavigationBarTheme: const BottomNavigationBarThemeData(
        backgroundColor: AppColors.surface,
        selectedItemColor: AppColors.primary,
        unselectedItemColor: AppColors.textTertiary,
        type: BottomNavigationBarType.fixed,
        elevation: 8,
      ),
      chipTheme: ChipThemeData(
        backgroundColor: AppColors.background,
        selectedColor: AppColors.primary.withOpacity(0.1),
        labelStyle: GoogleFonts.notoSansSc(fontSize: 12),
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(8),
        ),
      ),
      dividerTheme: const DividerThemeData(
        color: AppColors.divider,
        thickness: 1,
        space: 1,
      ),
      tabBarTheme: TabBarThemeData(
        labelColor: AppColors.primary,
        unselectedLabelColor: AppColors.textSecondary,
        labelStyle: GoogleFonts.notoSansSc(
          fontSize: 14, fontWeight: FontWeight.w600,
        ),
        unselectedLabelStyle: GoogleFonts.notoSansSc(
          fontSize: 14, fontWeight: FontWeight.w400,
        ),
        indicatorSize: TabBarIndicatorSize.tab,
      ),
    );
  }

  static ThemeData get darkTheme {
    return lightTheme.copyWith(
      brightness: Brightness.dark,
      colorScheme: const ColorScheme.dark(
        primary: AppColors.primaryLight,
        onPrimary: Colors.white,
        secondary: AppColors.accent,
        onSecondary: Colors.white,
        surface: Color(0xFF1E293B),
        onSurface: Colors.white,
        error: AppColors.error,
        onError: Colors.white,
        background: Color(0xFF0F172A),
        onBackground: Colors.white,
      ),
      scaffoldBackgroundColor: const Color(0xFF0F172A),
    );
  }
}

class AppGradients {
  static const primary = LinearGradient(
    colors: [AppColors.gradientStart, AppColors.gradientEnd],
    begin: Alignment.topLeft,
    end: Alignment.bottomRight,
  );

  static const card = LinearGradient(
    colors: [Color(0xFF1A56DB), Color(0xFF2563EB)],
    begin: Alignment.topLeft,
    end: Alignment.bottomRight,
  );

  static const shimmer = LinearGradient(
    colors: [Color(0xFFE2E8F0), Color(0xFFF1F5F9), Color(0xFFE2E8F0)],
    stops: [0.0, 0.5, 1.0],
    begin: Alignment(-1.0, -0.3),
    end: Alignment(1.0, 0.3),
  );
}

class AppAnimations {
  static const defaultDuration = Duration(milliseconds: 300);
  static const slowDuration = Duration(milliseconds: 500);
  static const fastDuration = Duration(milliseconds: 150);

  static Widget fadeSlide(Widget child, {int delay = 0}) {
    return child
        .animate()
        .fadeIn(duration: defaultDuration, delay: Duration(milliseconds: delay))
        .slideY(begin: 0.2, end: 0, duration: defaultDuration, delay: Duration(milliseconds: delay));
  }

  static Widget scaleIn(Widget child, {int delay = 0}) {
    return child
        .animate()
        .scale(begin: const Offset(0.9, 0.9), duration: defaultDuration, delay: Duration(milliseconds: delay))
        .fadeIn(duration: defaultDuration, delay: Duration(milliseconds: delay));
  }
}