import 'package:flutter/material.dart';
import 'package:google_fonts/google_fonts.dart';
import '../core/constants.dart';

ThemeData buildAppTheme() {
  final base = ThemeData.dark(useMaterial3: true);
  final textTheme = GoogleFonts.poppinsTextTheme(base.textTheme).apply(
    bodyColor: AppColors.textPrimary,
    displayColor: AppColors.textPrimary,
  );

  return base.copyWith(
    textTheme: textTheme,
    scaffoldBackgroundColor: AppColors.background,
    colorScheme: const ColorScheme.dark(
      surface: AppColors.surface,
      primary: AppColors.accent,
      secondary: AppColors.accent,
      onPrimary: Colors.white,
      onSurface: AppColors.textPrimary,
    ),
    cardTheme: CardThemeData(
      color: AppColors.surface,
      elevation: 0,
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(16),
      ),
      margin: EdgeInsets.zero,
    ),
    appBarTheme: AppBarTheme(
      backgroundColor: AppColors.background,
      elevation: 0,
      centerTitle: false,
      titleTextStyle: GoogleFonts.poppins(
        color: AppColors.textPrimary,
        fontSize: 20,
        fontWeight: FontWeight.w600,
      ),
      iconTheme: const IconThemeData(color: AppColors.textPrimary),
    ),
    navigationBarTheme: NavigationBarThemeData(
      backgroundColor: AppColors.surface,
      indicatorColor: AppColors.accent.withOpacity(0.2),
      labelTextStyle: WidgetStateProperty.resolveWith((states) {
        if (states.contains(WidgetState.selected)) {
          return GoogleFonts.poppins(
            color: AppColors.accent,
            fontSize: 12,
            fontWeight: FontWeight.w600,
          );
        }
        return GoogleFonts.poppins(
          color: AppColors.textSecondary,
          fontSize: 12,
        );
      }),
      iconTheme: WidgetStateProperty.resolveWith((states) {
        if (states.contains(WidgetState.selected)) {
          return const IconThemeData(color: AppColors.accent);
        }
        return const IconThemeData(color: AppColors.textSecondary);
      }),
    ),
    inputDecorationTheme: InputDecorationTheme(
      filled: true,
      fillColor: AppColors.surface,
      border: OutlineInputBorder(
        borderRadius: BorderRadius.circular(12),
        borderSide: const BorderSide(color: AppColors.divider),
      ),
      enabledBorder: OutlineInputBorder(
        borderRadius: BorderRadius.circular(12),
        borderSide: const BorderSide(color: AppColors.divider),
      ),
      focusedBorder: OutlineInputBorder(
        borderRadius: BorderRadius.circular(12),
        borderSide: const BorderSide(color: AppColors.accent, width: 1.5),
      ),
      labelStyle: const TextStyle(color: AppColors.textSecondary),
      hintStyle: const TextStyle(color: AppColors.textSecondary),
    ),
    elevatedButtonTheme: ElevatedButtonThemeData(
      style: ElevatedButton.styleFrom(
        backgroundColor: AppColors.accent,
        foregroundColor: Colors.white,
        minimumSize: const Size(double.infinity, 52),
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(14),
        ),
        textStyle: GoogleFonts.poppins(
          fontSize: 16,
          fontWeight: FontWeight.w600,
        ),
      ),
    ),
    dividerTheme: const DividerThemeData(
      color: AppColors.divider,
      thickness: 1,
    ),
  );
}