import 'dart:convert';

import 'package:flutter/material.dart';
import 'package:kmobile/api/services/cheque_service.dart';
import 'package:kmobile/data/models/user.dart';
import 'package:kmobile/di/injection.dart';

class StopSingleChequeScreen extends StatefulWidget {
  final User selectedAccount;
  final String date;
  final String instrType;
  final String fromCheque;
  final String toCheque;

  const StopSingleChequeScreen(
      {super.key,
      required this.selectedAccount,
      required this.date,
      required this.instrType,
      required this.fromCheque,
      required this.toCheque});

  @override
  State<StopSingleChequeScreen> createState() => _StopSingleChequeScreenState();
}

class _StopSingleChequeScreenState extends State<StopSingleChequeScreen> {
  final _formKey = GlobalKey<FormState>();
  final _stopFromChequeNoController = TextEditingController();
  final _stopIssueDateController = TextEditingController();
  final _stopExpiryDateController = TextEditingController();
  final _stopAmountController = TextEditingController();
  final _stopCommentController = TextEditingController();
  final _chequeService = getIt<ChequeService>();

  String _formatDate(String dateString) {
    if (dateString.length != 8) {
      return dateString; // Return as is if not in expected ddmmyyyy format
    }
    try {
      final day = dateString.substring(0, 2);
      final month = dateString.substring(2, 4);
      final year = dateString.substring(4, 8);
      return '$day/$month/$year';
    } catch (e) {
      return dateString; // Return original string on error
    }
  }

  Future<void> _showResponseDialog(String title, String message) async {
    return showDialog<void>(
      context: context,
      barrierDismissible: false, // user must tap button!
      builder: (BuildContext context) {
        return AlertDialog(
          title: Text(title),
          content: SingleChildScrollView(
            child: ListBody(
              children: <Widget>[
                Text(message),
              ],
            ),
          ),
          actions: <Widget>[
            TextButton(
              child: const Text('Close'),
              onPressed: () {
                Navigator.of(context).pop();
              },
            ),
          ],
        );
      },
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Stop Single Cheque'),
      ),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Form(
          key: _formKey,
          child: ListView(
            children: [
              Card(
                elevation: 0,
                margin: const EdgeInsets.symmetric(vertical: 8.0),
                child: ListTile(
                  leading: Image.asset(
                    'assets/images/logo.png',
                    width: 40,
                    height: 40,
                  ),
                  title: Text(widget.selectedAccount.accountNo!),
                  subtitle: const Text("Account Number"),
                ),
              ),
              const SizedBox(height: 24),
              TextFormField(
                controller: _stopFromChequeNoController,
                decoration: const InputDecoration(
                  labelText: 'Cheque Number *',
                  border: OutlineInputBorder(),
                ),
                keyboardType: TextInputType.number,
                validator: (value) {
                  if (value == null || value.isEmpty) {
                    return 'Please enter a cheque number';
                  }
                  final chequeNumber = int.tryParse(value);
                  final fromCheque = int.tryParse(widget.fromCheque);
                  final toCheque = int.tryParse(widget.toCheque);
                  if (chequeNumber == null ||
                      fromCheque == null ||
                      toCheque == null) {
                    return 'Invalid cheque number format';
                  }
                  if (chequeNumber < fromCheque || chequeNumber > toCheque) {
                    return 'Cheque number must be between ${widget.fromCheque} and ${widget.toCheque}';
                  }
                  return null;
                },
              ),
              const SizedBox(height: 16),
              TextFormField(
                initialValue: widget.instrType,
                readOnly: true,
                decoration: const InputDecoration(
                  labelText: 'Instrument Type *',
                  border: OutlineInputBorder(),
                ),
              ),
              const SizedBox(height: 16),
              TextFormField(
                controller: _stopIssueDateController,
                decoration: const InputDecoration(
                  labelText: 'Stop Issue Date',
                  border: OutlineInputBorder(),
                ),
                keyboardType: TextInputType.datetime,
              ),
              const SizedBox(height: 16),
              TextFormField(
                controller: _stopExpiryDateController,
                decoration: const InputDecoration(
                  labelText: 'Stop Expiry Date',
                  border: OutlineInputBorder(),
                ),
                keyboardType: TextInputType.datetime,
              ),
              const SizedBox(height: 16),
              TextFormField(
                controller: _stopAmountController,
                decoration: const InputDecoration(
                  labelText: 'Stop Amount',
                  border: OutlineInputBorder(),
                ),
                keyboardType: TextInputType.number,
              ),
              const SizedBox(height: 16),
              TextFormField(
                controller: _stopCommentController,
                decoration: const InputDecoration(
                  labelText: 'Stop Comment',
                  border: OutlineInputBorder(),
                ),
              ),
              const SizedBox(height: 16),
              TextFormField(
                initialValue: _formatDate(widget.date),
                readOnly: true,
                decoration: const InputDecoration(
                  labelText: 'Chequebook Issue Date',
                  border: OutlineInputBorder(),
                ),
              ),
              const SizedBox(height: 32),
              ElevatedButton(
                onPressed: () async {
                  if (_formKey.currentState!.validate()) {
                    try {
                      final response = await _chequeService.stopCheque(
                        accountno: widget.selectedAccount.accountNo!,
                        stopFromChequeNo: _stopFromChequeNoController.text,
                        instrType: widget.instrType,
                        stopToChequeNo: _stopFromChequeNoController.text,
                        stopIssueDate: _stopIssueDateController.text,
                        stopExpiryDate: _stopExpiryDateController.text,
                        stopAmount: _stopAmountController.text,
                        stopComment: _stopCommentController.text,
                        chequeIssueDate: widget.date,
                      );
                      if (!mounted) return;
                      final decodedResponse = jsonDecode(response);
                      final status = decodedResponse['status'];
                      final message = decodedResponse['message'];
                      if (status == 'SUCCESS') {
                        _showResponseDialog('Success', message);
                      } else {
                        _showResponseDialog('Error', message);
                      }
                    } catch (e) {
                      _showResponseDialog('Error', e.toString());
                    }
                  }
                },
                child: const Text('Stop Cheque'),
              ),
            ],
          ),
        ),
      ),
    );
  }
}