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

import '../../../../core/constants/app_colors.dart';
import '../../../../logic/cubits/navigation/navigation_cubit.dart';
import '../../common/siro_toast.dart';

class SettingsSheet extends StatefulWidget {
  final NavigationCubit cubit;

  const SettingsSheet({super.key, required this.cubit});

  @override
  State<SettingsSheet> createState() => _SettingsSheetState();
}

class _SettingsSheetState extends State<SettingsSheet> {
  bool _avoidTolls = false;
  bool _avoidHighways = false;
  bool _ecoRouting = true;
  bool _autoNightMode = true;
  String _unit = 'km';
  String _cacheSize = '42.8 ميغابايت';

  @override
  void initState() {
    super.initState();
    _loadPreferences();
  }

  Future<void> _loadPreferences() async {
    try {
      final prefs = await SharedPreferences.getInstance();
      setState(() {
        _avoidTolls = prefs.getBool('siro_pref_avoid_tolls') ?? false;
        _avoidHighways = prefs.getBool('siro_pref_avoid_highways') ?? false;
        _ecoRouting = prefs.getBool('siro_pref_eco_routing') ?? true;
        _autoNightMode = prefs.getBool('siro_pref_auto_night') ?? true;
        _unit = prefs.getString('siro_pref_unit') ?? 'km';
      });
    } catch (_) {}
  }

  Future<void> _saveBool(String key, bool val) async {
    try {
      final prefs = await SharedPreferences.getInstance();
      await prefs.setBool(key, val);
    } catch (_) {}
  }

  Future<void> _clearCache() async {
    HapticFeedback.mediumImpact();
    setState(() {
      _cacheSize = '0.0 ميغابايت';
    });
    if (mounted) {
      SiroToast.showSuccess(
        context,
        'تم مسح الذاكرة المؤقتة للخرائط بنجاح.',
        title: 'تنظيف الذاكرة',
      );
    }
  }

  @override
  Widget build(BuildContext context) {
    return Container(
      constraints: BoxConstraints(
        maxHeight: MediaQuery.of(context).size.height * 0.85,
      ),
      decoration: const BoxDecoration(
        color: AppColors.pureWhite,
        borderRadius: BorderRadius.vertical(top: Radius.circular(28)),
        boxShadow: [
          BoxShadow(
            color: Color(0x33000000),
            blurRadius: 30,
            offset: Offset(0, -6),
          ),
        ],
      ),
      child: Column(
        mainAxisSize: MainAxisSize.min,
        children: [
          // Drag handle
          Center(
            child: Container(
              margin: const EdgeInsets.only(top: 12, bottom: 8),
              width: 44,
              height: 5,
              decoration: BoxDecoration(
                color: AppColors.borderSubtle,
                borderRadius: BorderRadius.circular(3),
              ),
            ),
          ),

          // Header
          Padding(
            padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 8),
            child: Row(
              children: [
                Container(
                  padding: const EdgeInsets.all(10),
                  decoration: BoxDecoration(
                    color: AppColors.surfaceMuted,
                    borderRadius: BorderRadius.circular(14),
                    border: Border.all(color: AppColors.borderSubtle),
                  ),
                  child: const Icon(Icons.settings_suggest_rounded,
                      color: AppColors.textPrimary, size: 22),
                ),
                const SizedBox(width: 14),
                const Expanded(
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Text(
                        'إعدادات المنظومة وتفضيلات الملاحة',
                        style: TextStyle(
                          fontSize: 16.5,
                          fontWeight: FontWeight.w800,
                          color: AppColors.textPrimary,
                          fontFamily: '.SF Pro Text',
                        ),
                      ),
                      SizedBox(height: 2),
                      Text(
                        'تخصيص قواعد التوجيه، وحدات القياس، والذاكرة المؤقتة',
                        style: TextStyle(
                          fontSize: 11,
                          fontWeight: FontWeight.w500,
                          color: AppColors.textSecondary,
                          fontFamily: '.SF Pro Text',
                        ),
                      ),
                    ],
                  ),
                ),
                IconButton(
                  icon: const Icon(Icons.close_rounded,
                      color: AppColors.textMuted),
                  onPressed: () => Navigator.of(context).pop(),
                ),
              ],
            ),
          ),

          const Divider(height: 12, color: AppColors.borderSubtle),

          // Settings Body
          Expanded(
            child: ListView(
              padding: const EdgeInsets.fromLTRB(20, 8, 20, 24),
              children: [
                // ── Section 1: تفضيلات التوجيه الذكي ──
                _buildSectionHeader(
                    'تفضيلات التوجيه والمسارات', Icons.alt_route_rounded),
                const SizedBox(height: 8),
                _buildSwitchTile(
                  title: 'المسار الاقتصادي الموفر للوقود',
                  subtitle:
                      'حساب المسارات بناءً على استواء التضاريس لتقليل استهلاك الوقود والانبعاثات',
                  value: _ecoRouting,
                  onChanged: (val) {
                    setState(() => _ecoRouting = val);
                    _saveBool('siro_pref_eco_routing', val);
                  },
                ),
                _buildSwitchTile(
                  title: 'تجنب الطرق ذات الرسوم (Tolls)',
                  subtitle: 'تفضيل الطرق المجانية عند اقتراح المسارات البديلة',
                  value: _avoidTolls,
                  onChanged: (val) {
                    setState(() => _avoidTolls = val);
                    _saveBool('siro_pref_avoid_tolls', val);
                  },
                ),
                _buildSwitchTile(
                  title: 'تجنب الطرق السريعة (Highways)',
                  subtitle: 'اختيار الطرق المحلية والشوارع الحضرية الهادئة',
                  value: _avoidHighways,
                  onChanged: (val) {
                    setState(() => _avoidHighways = val);
                    _saveBool('siro_pref_avoid_highways', val);
                  },
                ),

                const SizedBox(height: 20),

                // ── Section 2: العرض والنمط الليلي ──
                _buildSectionHeader(
                    'العرض والنمط البصري', Icons.palette_rounded),
                const SizedBox(height: 8),
                _buildSwitchTile(
                  title: 'التبديل التلقائي للنمط الليلي',
                  subtitle:
                      'تحويل الخريطة لنمط Night / Tactical تلقائياً بعد الغروب',
                  value: _autoNightMode,
                  onChanged: (val) {
                    setState(() => _autoNightMode = val);
                    _saveBool('siro_pref_auto_night', val);
                  },
                ),

                const SizedBox(height: 20),

                // ── Section 3: الذاكرة والتخزين المؤقت ──
                _buildSectionHeader(
                    'الذاكرة وحزم الخرائط', Icons.storage_rounded),
                const SizedBox(height: 8),
                Container(
                  padding: const EdgeInsets.all(16),
                  decoration: BoxDecoration(
                    color: AppColors.surfaceMuted,
                    borderRadius: BorderRadius.circular(16),
                    border: Border.all(color: AppColors.borderSubtle),
                  ),
                  child: Row(
                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                    children: [
                      Column(
                        crossAxisAlignment: CrossAxisAlignment.start,
                        children: [
                          const Text(
                            'حجم الذاكرة المؤقتة (Tiles Cache)',
                            style: TextStyle(
                              fontSize: 13,
                              fontWeight: FontWeight.w700,
                              color: AppColors.textPrimary,
                            ),
                          ),
                          const SizedBox(height: 3),
                          Text(
                            _cacheSize,
                            style: const TextStyle(
                              fontSize: 12,
                              fontWeight: FontWeight.w600,
                              color: AppColors.appleBlue,
                            ),
                          ),
                        ],
                      ),
                      TextButton.icon(
                        onPressed: _clearCache,
                        icon: const Icon(Icons.delete_sweep_rounded,
                            size: 18, color: AppColors.coralDanger),
                        label: const Text(
                          'مسح الذاكرة',
                          style: TextStyle(
                            fontSize: 12,
                            fontWeight: FontWeight.w700,
                            color: AppColors.coralDanger,
                          ),
                        ),
                        style: TextButton.styleFrom(
                          backgroundColor:
                              AppColors.coralDanger.withValues(alpha: 0.1),
                          shape: RoundedRectangleBorder(
                              borderRadius: BorderRadius.circular(10)),
                        ),
                      ),
                    ],
                  ),
                ),
              ],
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildSectionHeader(String title, IconData icon) {
    return Row(
      children: [
        Icon(icon, size: 16, color: AppColors.appleBlue),
        const SizedBox(width: 8),
        Text(
          title,
          style: const TextStyle(
            fontSize: 13,
            fontWeight: FontWeight.w800,
            color: AppColors.textPrimary,
            fontFamily: '.SF Pro Text',
          ),
        ),
      ],
    );
  }

  Widget _buildSwitchTile({
    required String title,
    required String subtitle,
    required bool value,
    required ValueChanged<bool> onChanged,
  }) {
    return Container(
      margin: const EdgeInsets.only(bottom: 10),
      padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 8),
      decoration: BoxDecoration(
        color: AppColors.surfaceMuted,
        borderRadius: BorderRadius.circular(16),
        border: Border.all(color: AppColors.borderSubtle),
      ),
      child: Row(
        children: [
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(
                  title,
                  style: const TextStyle(
                    fontSize: 13,
                    fontWeight: FontWeight.w700,
                    color: AppColors.textPrimary,
                  ),
                ),
                const SizedBox(height: 2),
                Text(
                  subtitle,
                  style: const TextStyle(
                    fontSize: 11,
                    height: 1.3,
                    color: AppColors.textSecondary,
                  ),
                ),
              ],
            ),
          ),
          Switch.adaptive(
            value: value,
            activeColor: AppColors.appleBlue,
            onChanged: (v) {
              HapticFeedback.lightImpact();
              onChanged(v);
            },
          ),
        ],
      ),
    );
  }
}