// food_cart_page.dart — مراجعة السلة، عرض السعر الموقّع، وإنشاء الطلب
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:geolocator/geolocator.dart';

import '../../constant/box_name.dart';
import '../../constant/colors.dart';
import '../../constant/style.dart';
import '../../main.dart';
import '../../views/widgets/error_snakbar.dart';
import '../../controller/food/food_controller.dart';
import '../../controller/food/food_models.dart';
import '../widgets/my_scafold.dart';
import 'food_order_tracking_page.dart';

class FoodCartPage extends StatefulWidget {
  const FoodCartPage({super.key});

  @override
  State<FoodCartPage> createState() => _FoodCartPageState();
}

class _FoodCartPageState extends State<FoodCartPage> {
  final TextEditingController _addressController = TextEditingController();
  final TextEditingController _noteController = TextEditingController();
  String _paymentMethod = 'wallet';
  Position? _position;
  bool _isFetchingLocation = false;

  bool get _isAr => box.read(BoxName.lang) == 'ar';

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

  Future<void> _fetchLocation() async {
    setState(() => _isFetchingLocation = true);
    try {
      final permission = await Geolocator.checkPermission();
      if (permission == LocationPermission.denied) {
        await Geolocator.requestPermission();
      }
      _position = await Geolocator.getCurrentPosition(desiredAccuracy: LocationAccuracy.high);
    } catch (_) {
      _position = null;
    }
    if (mounted) setState(() => _isFetchingLocation = false);
  }

  @override
  Widget build(BuildContext context) {
    return GetBuilder<FoodController>(
      builder: (c) => MyScafolld(
        title: _isAr ? 'السلة' : 'Cart',
        isleading: true,
        body: [
          c.cartLines.isEmpty ? _emptyCart() : _cartContent(c),
        ],
      ),
    );
  }

  Widget _emptyCart() {
    return Center(
      child: Column(
        mainAxisSize: MainAxisSize.min,
        children: [
          Icon(Icons.shopping_cart_outlined, size: 72, color: AppColor.grayColor),
          const SizedBox(height: 16),
          Text(_isAr ? 'سلتك فارغة' : 'Your cart is empty', style: AppStyle.title),
        ],
      ),
    );
  }

  Widget _cartContent(FoodController c) {
    return Column(
      children: [
        Expanded(
          child: ListView(
            padding: const EdgeInsets.all(16),
            children: [
              ...c.cartLines.map((line) => _cartLineTile(c, line)),
              const SizedBox(height: 16),
              _summaryRow(_isAr ? 'المجموع الفرعي' : 'Subtotal', foodFormatPrice(c.cartTotal)),
              if (c.currentQuote != null) ...[
                _summaryRow(_isAr ? 'رسوم التوصيل' : 'Delivery fee', foodFormatPrice(c.currentQuote!.deliveryFee)),
                const Divider(),
                _summaryRow(_isAr ? 'الإجمالي' : 'Total', foodFormatPrice(c.currentQuote!.grandTotal), bold: true),
              ],
              const SizedBox(height: 20),
              TextField(
                controller: _addressController,
                decoration: InputDecoration(
                  labelText: _isAr ? 'عنوان التوصيل' : 'Delivery address',
                  border: OutlineInputBorder(borderRadius: BorderRadius.circular(12)),
                  suffixIcon: _isFetchingLocation
                      ? const Padding(
                          padding: EdgeInsets.all(12),
                          child: SizedBox(width: 16, height: 16, child: CircularProgressIndicator(strokeWidth: 2)),
                        )
                      : Icon(_position != null ? Icons.my_location_rounded : Icons.location_off_rounded,
                          color: _position != null ? AppColor.greenColor : AppColor.redColor),
                ),
              ),
              const SizedBox(height: 12),
              TextField(
                controller: _noteController,
                decoration: InputDecoration(
                  labelText: _isAr ? 'ملاحظات (اختياري)' : 'Notes (optional)',
                  border: OutlineInputBorder(borderRadius: BorderRadius.circular(12)),
                ),
              ),
              const SizedBox(height: 16),
              _paymentMethodPicker(),
            ],
          ),
        ),
        Padding(
          padding: EdgeInsets.fromLTRB(16, 8, 16, MediaQuery.of(context).padding.bottom + 16),
          child: SizedBox(
            width: double.infinity,
            height: 52,
            child: ElevatedButton(
              style: ElevatedButton.styleFrom(
                backgroundColor: AppColor.primaryColor,
                shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(14)),
              ),
              onPressed: c.isQuoting || c.isPlacingOrder ? null : () => _onCheckoutPressed(c),
              child: c.isPlacingOrder
                  ? const CircularProgressIndicator(color: Colors.white)
                  : Text(
                      c.currentQuote == null
                          ? (_isAr ? 'احسب السعر' : 'Get Quote')
                          : '${_isAr ? "اطلب الآن" : "Place Order"} · ${foodFormatPrice(c.currentQuote!.grandTotal)}',
                      style: const TextStyle(color: Colors.white, fontWeight: FontWeight.bold, fontSize: 16),
                    ),
            ),
          ),
        ),
      ],
    );
  }

  Future<void> _onCheckoutPressed(FoodController c) async {
    if (c.currentQuote == null) {
      await c.refreshQuote();
      return;
    }

    if (_addressController.text.trim().isEmpty) {
      mySnackbarWarning(_isAr ? 'أدخل عنوان التوصيل' : 'Enter a delivery address');
      return;
    }
    if (_position == null) {
      mySnackbarWarning(_isAr ? 'تعذّر تحديد موقعك — فعّل خدمة الموقع' : 'Could not get your location — enable location services');
      return;
    }

    final orderId = await c.placeOrder(
      deliveryAddress: _addressController.text.trim(),
      deliveryLat: _position!.latitude,
      deliveryLng: _position!.longitude,
      paymentMethod: _paymentMethod,
      customerNote: _noteController.text.trim(),
    );

    if (orderId != null) {
      Get.offAll(() => FoodOrderTrackingPage(orderId: orderId));
    }
  }

  Widget _cartLineTile(FoodController c, FoodCartLine line) {
    return Card(
      margin: const EdgeInsets.only(bottom: 10),
      color: AppColor.cardColor,
      elevation: 0,
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(14),
        side: BorderSide(color: AppColor.borderColor),
      ),
      child: Padding(
        padding: const EdgeInsets.all(12),
        child: Row(
          children: [
            Expanded(
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text(line.item.nameAr, style: AppStyle.title.copyWith(fontWeight: FontWeight.bold)),
                  const SizedBox(height: 4),
                  Text(foodFormatPrice(line.lineTotal), style: AppStyle.subtitle.copyWith(color: AppColor.accentColor)),
                ],
              ),
            ),
            IconButton(
              icon: const Icon(Icons.remove_circle_outline_rounded),
              onPressed: () => c.updateQuantity(line.lineKey, line.quantity - 1),
            ),
            Text(line.quantity.toString(), style: AppStyle.title),
            IconButton(
              icon: const Icon(Icons.add_circle_outline_rounded),
              onPressed: () => c.updateQuantity(line.lineKey, line.quantity + 1),
            ),
          ],
        ),
      ),
    );
  }

  Widget _summaryRow(String label, String value, {bool bold = false}) {
    final style = bold
        ? AppStyle.title.copyWith(fontWeight: FontWeight.bold, fontSize: 18)
        : AppStyle.subtitle;
    return Padding(
      padding: const EdgeInsets.symmetric(vertical: 4),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        children: [Text(label, style: style), Text(value, style: style)],
      ),
    );
  }

  Widget _paymentMethodPicker() {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Text(_isAr ? 'طريقة الدفع' : 'Payment method', style: AppStyle.title.copyWith(fontWeight: FontWeight.bold)),
        RadioListTile<String>(
          contentPadding: EdgeInsets.zero,
          value: 'wallet',
          groupValue: _paymentMethod,
          title: Text(_isAr ? 'المحفظة' : 'Wallet'),
          onChanged: (v) => setState(() => _paymentMethod = v!),
        ),
        RadioListTile<String>(
          contentPadding: EdgeInsets.zero,
          value: 'cash',
          groupValue: _paymentMethod,
          title: Text(_isAr ? 'نقداً عند الاستلام' : 'Cash on delivery'),
          onChanged: (v) => setState(() => _paymentMethod = v!),
        ),
      ],
    );
  }
}