import 'package:flutter/material.dart';
import 'package:flutter_svg/flutter_svg.dart';
import '../widgets/app_background.dart';
import '../widgets/settings_bar.dart';
import '../widgets/onboarding_button.dart';
import '../models/advance_request.dart';
import '../services/request_service.dart';

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

  @override
  State<RequestAdvanceScreen> createState() => _RequestAdvanceScreenState();
}

class _RequestAdvanceScreenState extends State<RequestAdvanceScreen> {
  
  // Text controller for amount
  final TextEditingController amountController = TextEditingController();
  // Text controller for reason
  final TextEditingController reasonController = TextEditingController();

  final RequestService _requestService = RequestService();

  // Method to save the advance request
  Future<void> _saveAdvanceRequest() async {
    if (amountController.text.isEmpty || reasonController.text.isEmpty) {
      // Show an error message if fields are empty
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(
          content: Text('الرجاء إدخال جميع الحقول'),
          backgroundColor: Colors.red,
        ),
      );
      return;
    }

    // Parse the amount to double
    final amount = double.tryParse(amountController.text);
    if (amount == null || amount <= 0) {
      // Show an error message if amount is invalid
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(
          content: Text('الرجاء إدخال مبلغ صحيح'),
          backgroundColor: Colors.red,
        ),
      );
      return;
    }

    // Create a new advance request
    final advanceRequest = AdvanceRequest(
      id: DateTime.now().millisecondsSinceEpoch.toString(),
      amount: amount,
      reason: reasonController.text,
    );

    // Save the advance request
    await _requestService.addAdvanceRequest(advanceRequest);

    // Show a success message
    ScaffoldMessenger.of(context).showSnackBar(
      const SnackBar(
        content: Text('تم إرسال طلب السلفة بنجاح'),
        backgroundColor: Colors.green,
      ),
    );

    // Navigate back to the previous screen
    Navigator.pop(context);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: AppBackground(
        child: SafeArea(
          child: Column(
            children: [
              // Settings bar
              SettingsBar(
                selectedIndex: -1,
                onTap: (_) {},
                showBackButton: true,
                onBackTap: () => Navigator.pop(context),
                iconPaths: const [
                  "assets/images/user.svg",
                  "assets/images/bell.svg",
                ],
              ),

              Expanded(
                child: SingleChildScrollView(
                  padding: const EdgeInsets.symmetric(horizontal: 25),
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      // Title for advance request
                      const Align(
                        alignment: Alignment.topRight,
                        child: Text(
                          "طلب سلفة",
                          style: TextStyle(
                            color: Colors.white,
                            fontSize: 28,
                            fontWeight: FontWeight.bold,
                          ),
                        ),
                      ),

                      const SizedBox(height: 40),
                      //=============================
                      // AMOUNT INPUT
                      //=============================
                      Align(
                        alignment: Alignment.centerRight,
                        child: const Text(
                          "المبلغ المطلوب",
                          style: TextStyle(
                            color: Colors.white,
                            fontSize: 18,
                            fontWeight: FontWeight.w600,
                          ),
                        ),
                      ),

                      const SizedBox(height: 6),

                      Directionality(
                        textDirection: TextDirection.rtl,
                        child: Container(
                          width: double.infinity,
                          padding: const EdgeInsets.symmetric(horizontal: 20),
                          height: 58,
                          decoration: BoxDecoration(
                            color: Colors.white,
                            borderRadius: BorderRadius.circular(14),
                            boxShadow: const [
                              BoxShadow(
                                color: Color(0x22000000),
                                blurRadius: 8,
                                offset: Offset(0, 3),
                              ),
                            ],
                          ),
                          child: TextField(
                            controller: amountController,
                            textAlign: TextAlign.right,
                            keyboardType: TextInputType.number,
                            decoration: const InputDecoration(
                              border: InputBorder.none,
                              hintText: "دع .000 ",
                              hintStyle: TextStyle(color: Colors.grey),
                            ),
                          ),
                        ),
                      ),

                      const SizedBox(height: 25),

                      // =============================
                      // REASON TEXTFIELD
                      // =============================
                      Align(
                        alignment: Alignment.centerRight,
                        child: Directionality(
                          textDirection: TextDirection.rtl,
                          child: const Text(
                            "السبب",
                            style: TextStyle(
                              color: Colors.white,
                              fontSize: 18,
                              fontWeight: FontWeight.w600,
                            ),
                          ),
                        ),
                      ),

                      // OUTER BORDER CONTAINER
                      Container(
                        padding: const EdgeInsets.all(
                          15,
                        ), // border thickness space
                        decoration: BoxDecoration(
                          border: Border.all(
                            color: Color(0xFF00FFAA), // green border
                            width: 0.5,
                          ),
                          borderRadius: BorderRadius.circular(14),
                        ),

                        // INNER TEXTFIELD CONTAINER
                        child: Container(
                          height: 100,
                          padding: const EdgeInsets.symmetric(
                            horizontal: 14,
                            vertical: 10,
                          ),
                          decoration: BoxDecoration(
                            color: const Color(0xFFEAEAEA),
                            borderRadius: BorderRadius.circular(12),
                          ),
                          // Added Directionality to fix text direction
                          child: Directionality(
                            textDirection: TextDirection.rtl,
                            child: TextField(
                              controller: reasonController,
                              maxLines: 5,
                              textAlign:
                                  TextAlign
                                      .right, // Added this to align text to the right
                              decoration: const InputDecoration(
                                border: InputBorder.none,
                                hintText:
                                    "اكتب السبب", // Added placeholder text
                                hintStyle: TextStyle(color: Colors.grey),
                              ),
                            ),
                          ),
                        ),
                      ),

                      const SizedBox(height: 70),

                      // CONFIRM BUTTON
                      Center(
                        child: OnboardingButton(
                          text: "تأكيد الطلب",
                          backgroundColor: const Color(0xFFD1FEF0),
                          textColor: Colors.black,
                          onPressed: _saveAdvanceRequest, // Call the save method
                        ),
                      ),

                      const SizedBox(height: 40),
                    ],
                  ),
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}