import 'dart:async';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:intl/intl.dart';
// تأكد من استيراد الملفات الصحيحة حسب مشروع السائق الخاص بك
import 'package:sefer_driver/constant/links.dart';
import 'package:sefer_driver/controller/functions/crud.dart';
import '../../../constant/box_name.dart';
import '../../../main.dart';
// import '../../../print.dart'; // إذا كنت تستخدمه

// --- خدمة الدفع للسائق (نفس المنطق الخاص بالسائق) ---
class PaymentService {
  final String _baseUrl = "${AppLink.paymentServer}/ride/shamcash";

  Future<String?> createInvoice({required double amount}) async {
    final url = "$_baseUrl/create_invoice_shamcash.php";
    try {
      final response = await CRUD().postWallet(
        link: url,
        payload: {
          'driverID': box.read(BoxName.driverID), // استخدام driverID
          'amount': amount.toString(),
        },
      ).timeout(const Duration(seconds: 15));

      if (response != 'failure') {
        final data = response;
        if (data['status'] == 'success' && data['invoice_number'] != null) {
          return data['invoice_number'].toString();
        }
      }
      return null;
    } catch (e) {
      return null;
    }
  }

  Future<bool> checkInvoiceStatus(String invoiceNumber) async {
    final url = "$_baseUrl/check_status.php";
    try {
      final response = await CRUD().postWallet(link: url, payload: {
        'invoice_number': invoiceNumber,
      }).timeout(const Duration(seconds: 10));

      if (response != 'failure') {
        final data = response;
        return data['status'] == 'success' &&
            data['invoice_status'] == 'completed';
      }
      return false;
    } catch (e) {
      return false;
    }
  }
}

enum PaymentStatus {
  creatingInvoice,
  waitingForPayment,
  paymentSuccess,
  paymentTimeout,
  paymentError
}

class PaymentScreenSmsProvider extends StatefulWidget {
  final double amount;
  final String providerName;
  final String providerLogo;
  final String qrImagePath;

  const PaymentScreenSmsProvider({
    super.key,
    required this.amount,
    this.providerName = 'شام كاش',
    this.providerLogo = 'assets/images/shamCash.png',
    this.qrImagePath = 'assets/images/shamcashsend.png',
  });

  @override
  _PaymentScreenSmsProviderState createState() =>
      _PaymentScreenSmsProviderState();
}

class _PaymentScreenSmsProviderState extends State<PaymentScreenSmsProvider>
    with SingleTickerProviderStateMixin {
  final PaymentService _paymentService = PaymentService();
  Timer? _pollingTimer;
  PaymentStatus _status = PaymentStatus.creatingInvoice;
  String? _invoiceNumber;

  // العنوان الثابت للدفع (كما في تطبيق الراكب)
  final String _paymentAddress = "80f23afe40499b02f49966c3340ae0fc";

  // متغيرات الأنيميشن (الوميض)
  late AnimationController _blinkController;
  late Animation<Color?> _colorAnimation;
  late Animation<double> _shadowAnimation;

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

    // إعداد الأنيميشن (وميض أحمر)
    _blinkController = AnimationController(
      duration: const Duration(milliseconds: 800),
      vsync: this,
    )..repeat(reverse: true);

    _colorAnimation = ColorTween(
      begin: Colors.red.shade700,
      end: Colors.red.shade100,
    ).animate(_blinkController);

    _shadowAnimation = Tween<double>(begin: 2.0, end: 15.0).animate(
      CurvedAnimation(parent: _blinkController, curve: Curves.easeInOut),
    );

    _createAndPollInvoice();
  }

  @override
  void dispose() {
    _pollingTimer?.cancel();
    _blinkController.dispose();
    super.dispose();
  }

  void _createAndPollInvoice() async {
    setState(() => _status = PaymentStatus.creatingInvoice);
    final invoiceNumber =
        await _paymentService.createInvoice(amount: widget.amount);

    if (invoiceNumber != null && mounted) {
      setState(() {
        _invoiceNumber = invoiceNumber;
        _status = PaymentStatus.waitingForPayment;
      });
      _startPolling(invoiceNumber);
    } else if (mounted) {
      setState(() => _status = PaymentStatus.paymentError);
    }
  }

  void _startPolling(String invoiceNumber) {
    const timeoutDuration = Duration(minutes: 5);
    var elapsed = Duration.zero;

    _pollingTimer = Timer.periodic(const Duration(seconds: 5), (timer) async {
      elapsed += const Duration(seconds: 5);
      if (elapsed >= timeoutDuration) {
        timer.cancel();
        if (mounted) setState(() => _status = PaymentStatus.paymentTimeout);
        return;
      }
      final isCompleted =
          await _paymentService.checkInvoiceStatus(invoiceNumber);
      if (isCompleted && mounted) {
        timer.cancel();
        setState(() => _status = PaymentStatus.paymentSuccess);
      }
    });
  }

  Future<bool> _onPopInvoked() async {
    if (_status == PaymentStatus.waitingForPayment) {
      return (await showDialog<bool>(
            context: context,
            builder: (context) => AlertDialog(
              title: const Text('إلغاء العملية؟', textAlign: TextAlign.right),
              content: const Text(
                  'الخروج الآن سيؤدي لإلغاء متابعة عملية الدفع.',
                  textAlign: TextAlign.right),
              actions: <Widget>[
                TextButton(
                    onPressed: () => Navigator.of(context).pop(false),
                    child: const Text('البقاء')),
                TextButton(
                    onPressed: () => Navigator.of(context).pop(true),
                    child: const Text('خروج',
                        style: TextStyle(color: Colors.red))),
              ],
            ),
          )) ??
          false;
    }
    return true;
  }

  @override
  Widget build(BuildContext context) {
    return WillPopScope(
      onWillPop: _onPopInvoked,
      child: Scaffold(
        backgroundColor: Colors.grey[50],
        appBar: AppBar(
          title: Text("دفع عبر ${widget.providerName}"),
          centerTitle: true,
          elevation: 0,
          backgroundColor: Colors.white,
          foregroundColor: Colors.black,
        ),
        body: SafeArea(
          child: Padding(
            padding: const EdgeInsets.all(20.0),
            child: Center(child: _buildContentByStatus()),
          ),
        ),
      ),
    );
  }

  Widget _buildContentByStatus() {
    switch (_status) {
      case PaymentStatus.creatingInvoice:
        return const Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            CircularProgressIndicator(),
            SizedBox(height: 20),
            Text("جاري إنشاء رقم البيان...", style: TextStyle(fontSize: 16)),
          ],
        );
      case PaymentStatus.waitingForPayment:
        return _buildWaitingForPaymentUI();
      case PaymentStatus.paymentSuccess:
        return _buildSuccessUI();
      case PaymentStatus.paymentTimeout:
      case PaymentStatus.paymentError:
        return _buildErrorUI();
    }
  }

  Widget _buildWaitingForPaymentUI() {
    final currencyFormat = NumberFormat.decimalPattern('ar_SY');
    final invoiceText = _invoiceNumber ?? '---';

    return SingleChildScrollView(
      physics: const BouncingScrollPhysics(),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.center,
        children: [
          // 1. المبلغ المطلوب
          Container(
            width: double.infinity,
            padding: const EdgeInsets.symmetric(vertical: 20, horizontal: 15),
            decoration: BoxDecoration(
              gradient: LinearGradient(
                  colors: [Colors.blue.shade800, Colors.blue.shade600]),
              borderRadius: BorderRadius.circular(16),
              boxShadow: [
                BoxShadow(
                    color: Colors.blue.withOpacity(0.25),
                    blurRadius: 15,
                    offset: const Offset(0, 8))
              ],
            ),
            child: Column(
              children: [
                const Text("المبلغ المطلوب شحنه",
                    style: TextStyle(color: Colors.white70, fontSize: 14)),
                const SizedBox(height: 5),
                Text(
                  "${currencyFormat.format(widget.amount)} ل.س",
                  style: const TextStyle(
                      color: Colors.white,
                      fontSize: 28,
                      fontWeight: FontWeight.bold),
                ),
              ],
            ),
          ),

          const SizedBox(height: 25),

          // 2. رقم البيان (الإطار الأحمر الوامض)
          AnimatedBuilder(
            animation: _blinkController,
            builder: (context, child) {
              return Container(
                padding: const EdgeInsets.all(20),
                decoration: BoxDecoration(
                  color: Colors.white,
                  borderRadius: BorderRadius.circular(16),
                  border: Border.all(
                    color: _colorAnimation.value ?? Colors.red,
                    width: 3.0, // إطار سميك
                  ),
                  boxShadow: [
                    BoxShadow(
                      color: (_colorAnimation.value ?? Colors.red)
                          .withOpacity(0.4),
                      blurRadius: _shadowAnimation.value,
                      spreadRadius: 2,
                    )
                  ],
                ),
                child: Column(
                  children: [
                    Row(
                      mainAxisAlignment: MainAxisAlignment.center,
                      children: [
                        Icon(Icons.warning_rounded,
                            color: Colors.red.shade800, size: 28),
                        const SizedBox(width: 8),
                        Text(
                          "هام جداً: لا تنسَ!",
                          style: TextStyle(
                              color: Colors.red.shade900,
                              fontWeight: FontWeight.bold,
                              fontSize: 18),
                        ),
                      ],
                    ),
                    const SizedBox(height: 10),
                    const Text(
                      "يجب نسخ (رقم البيان) هذا ووضعه في تطبيق شام كاش لضمان نجاح العملية.",
                      textAlign: TextAlign.center,
                      style: TextStyle(
                        fontSize: 15,
                        color: Colors.black87,
                        fontWeight: FontWeight.w600,
                      ),
                    ),
                    const SizedBox(height: 15),
                    InkWell(
                      onTap: () {
                        Clipboard.setData(ClipboardData(text: invoiceText));
                        ScaffoldMessenger.of(context).showSnackBar(
                          SnackBar(
                            content: const Text("تم نسخ رقم البيان ✅",
                                textAlign: TextAlign.center),
                            backgroundColor: Colors.red.shade700,
                            behavior: SnackBarBehavior.floating,
                            shape: RoundedRectangleBorder(
                                borderRadius: BorderRadius.circular(10)),
                            margin: const EdgeInsets.all(20),
                          ),
                        );
                      },
                      borderRadius: BorderRadius.circular(12),
                      child: Container(
                        padding: const EdgeInsets.symmetric(
                            horizontal: 15, vertical: 12),
                        decoration: BoxDecoration(
                          color: Colors.red.shade50,
                          borderRadius: BorderRadius.circular(12),
                          border:
                              Border.all(color: Colors.red.shade200, width: 1),
                        ),
                        child: Row(
                          mainAxisAlignment: MainAxisAlignment.spaceBetween,
                          children: [
                            Column(
                              crossAxisAlignment: CrossAxisAlignment.start,
                              children: [
                                const Text("رقم البيان (Invoice No)",
                                    style: TextStyle(
                                        fontSize: 12, color: Colors.grey)),
                                Text(invoiceText,
                                    style: TextStyle(
                                        fontSize: 24,
                                        fontWeight: FontWeight.bold,
                                        letterSpacing: 2.0,
                                        color: Colors.red.shade900)),
                              ],
                            ),
                            Container(
                              padding: const EdgeInsets.all(8),
                              decoration: BoxDecoration(
                                color: Colors.red.shade100,
                                borderRadius: BorderRadius.circular(8),
                              ),
                              child: Icon(Icons.copy_rounded,
                                  color: Colors.red.shade900, size: 24),
                            ),
                          ],
                        ),
                      ),
                    ),
                  ],
                ),
              );
            },
          ),

          const SizedBox(height: 25),

          // 3. عنوان الدفع (للتسهيل على السائق)
          Container(
            padding: const EdgeInsets.symmetric(horizontal: 15, vertical: 15),
            decoration: BoxDecoration(
              color: Colors.white,
              borderRadius: BorderRadius.circular(12),
              border: Border.all(color: Colors.grey.shade300),
            ),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                const Text("عنوان الدفع (Payment Address)",
                    style: TextStyle(fontSize: 12, color: Colors.grey)),
                const SizedBox(height: 8),
                InkWell(
                  onTap: () {
                    Clipboard.setData(ClipboardData(text: _paymentAddress));
                    ScaffoldMessenger.of(context).showSnackBar(
                      SnackBar(
                        content: const Text("تم نسخ عنوان الدفع ✅",
                            textAlign: TextAlign.center),
                        backgroundColor: Colors.green.shade600,
                        behavior: SnackBarBehavior.floating,
                        shape: RoundedRectangleBorder(
                            borderRadius: BorderRadius.circular(10)),
                        margin: const EdgeInsets.all(20),
                      ),
                    );
                  },
                  child: Row(
                    children: [
                      Expanded(
                        child: Text(
                          _paymentAddress,
                          style: const TextStyle(
                            fontSize: 14,
                            fontWeight: FontWeight.bold,
                            fontFamily: 'Courier',
                            color: Colors.black87,
                          ),
                          overflow: TextOverflow.ellipsis,
                        ),
                      ),
                      const SizedBox(width: 8),
                      const Icon(Icons.copy, size: 18, color: Colors.grey),
                    ],
                  ),
                ),
              ],
            ),
          ),

          const SizedBox(height: 30),

          // 4. الـ QR Code
          const Text("امسح الرمز للدفع",
              style: TextStyle(
                  fontSize: 16,
                  fontWeight: FontWeight.bold,
                  color: Colors.black87)),
          const SizedBox(height: 10),

          GestureDetector(
            onTap: () {
              showDialog(
                context: context,
                builder: (ctx) => Dialog(
                  backgroundColor: Colors.transparent,
                  child: InteractiveViewer(
                    child: Image.asset(widget.qrImagePath),
                  ),
                ),
              );
            },
            child: Container(
              padding: const EdgeInsets.all(10),
              decoration: BoxDecoration(
                color: Colors.white,
                borderRadius: BorderRadius.circular(15),
                border: Border.all(color: Colors.grey.shade300),
              ),
              child: Image.asset(
                widget.qrImagePath,
                width: 150,
                height: 150,
                fit: BoxFit.contain,
                errorBuilder: (c, o, s) =>
                    const Icon(Icons.qr_code_2, size: 100, color: Colors.grey),
              ),
            ),
          ),

          const SizedBox(height: 40),

          // مؤشر الانتظار
          const LinearProgressIndicator(backgroundColor: Colors.white),
          const SizedBox(height: 10),
          const Text("ننتظر إشعار الدفع تلقائياً...",
              style: TextStyle(color: Colors.grey, fontSize: 12)),
          const SizedBox(height: 20),
        ],
      ),
    );
  }

  Widget _buildSuccessUI() {
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        const Icon(Icons.verified_rounded, color: Colors.green, size: 100),
        const SizedBox(height: 20),
        const Text("تم الدفع بنجاح!",
            style: TextStyle(fontSize: 24, fontWeight: FontWeight.bold)),
        const SizedBox(height: 10),
        const Text("تم إضافة الرصيد إلى محفظتك",
            style: TextStyle(color: Colors.grey)),
        const SizedBox(height: 40),
        SizedBox(
          width: double.infinity,
          child: ElevatedButton(
            style: ElevatedButton.styleFrom(
                backgroundColor: Colors.green,
                foregroundColor: Colors.white,
                padding: const EdgeInsets.symmetric(vertical: 16),
                shape: RoundedRectangleBorder(
                    borderRadius: BorderRadius.circular(12))),
            onPressed: () => Navigator.of(context).pop(),
            child: const Text("متابعة", style: TextStyle(fontSize: 18)),
          ),
        ),
      ],
    );
  }

  Widget _buildErrorUI() {
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        Icon(Icons.error_outline_rounded, color: Colors.red.shade400, size: 80),
        const SizedBox(height: 20),
        Text(
          _status == PaymentStatus.paymentTimeout
              ? "انتهى الوقت"
              : "لم يتم التحقق",
          style: const TextStyle(fontSize: 22, fontWeight: FontWeight.bold),
        ),
        const SizedBox(height: 15),
        const Padding(
          padding: EdgeInsets.symmetric(horizontal: 30),
          child: Text(
              "لم يصلنا إشعار الدفع. هل تأكدت من وضع (رقم البيان) في الملاحظات؟",
              textAlign: TextAlign.center,
              style: TextStyle(color: Colors.grey, height: 1.5)),
        ),
        const SizedBox(height: 40),
        SizedBox(
          width: double.infinity,
          child: ElevatedButton.icon(
            style: ElevatedButton.styleFrom(
                padding: const EdgeInsets.symmetric(vertical: 15),
                shape: RoundedRectangleBorder(
                    borderRadius: BorderRadius.circular(12))),
            onPressed: _createAndPollInvoice,
            icon: const Icon(Icons.refresh),
            label: const Text("حاول مرة أخرى"),
          ),
        ),
        const SizedBox(height: 15),
        TextButton(
          onPressed: () => Navigator.of(context).pop(),
          child: const Text("إلغاء", style: TextStyle(color: Colors.grey)),
        )
      ],
    );
  }
}