// ignore_for_file: dead_code

import 'package:flutter/material.dart';
import 'package:intl/intl.dart';
import 'package:telemednet/route_names.dart';
import 'package:image_picker/image_picker.dart';

import 'dart:io';
import '../../../controller/patient_controller.dart';
import '../../../widgets/alert_screen.dart';

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

  @override
  State<PatientRegistrationScreen> createState() =>
      _PatientRegistrationScreenState();
}

class _PatientRegistrationScreenState extends State<PatientRegistrationScreen> {
  final PatientController _controller = PatientController();
  final TextEditingController _nameController = TextEditingController();
  final TextEditingController _phoneController = TextEditingController();
  bool _hasErrors = false;
  final Map<String, String> _errors = {};

  String? _gender;
  DateTime? _dateOfBirth;
  File? _image;
  final ImagePicker _picker = ImagePicker();
  String _selectedCountryCode = '+1';

  final List<String> _countryCodes = ['+1', '+91', '+44', '+61', '+81'];
  @override
  void initState() {
    super.initState();
    _nameController.text = _controller.model.name ?? '';
    if (_controller.model.phoneNumber != null) {
      String phoneNumber = _controller.model.phoneNumber!;
      if (phoneNumber.startsWith('+')) {
        for (String code in _countryCodes) {
          if (phoneNumber.startsWith(code)) {
            _selectedCountryCode = code;
            _phoneController.text = phoneNumber.substring(code.length);
            break;
          }
        }
      } else {
        _phoneController.text = phoneNumber;
      }
    }

    _gender = _controller.model.gender;
    _dateOfBirth = _controller.model.dateOfBirth;
    if (_controller.model.profileImagePath != null) {
      _image = File(_controller.model.profileImagePath!);
    }
    _updateCombinedPhoneNumber(_phoneController.text);
  }

  Future<void> _getImage(ImageSource source) async {
    final XFile? pickedFile = await _picker.pickImage(source: source);

    if (pickedFile != null) {
      setState(() {
        _image = File(pickedFile.path);
      });
      _controller.updateProfileImage(pickedFile.path);
    }
  }

  void _updateCombinedPhoneNumber(String phoneNumber) {
    String cleanPhoneNumber = phoneNumber.replaceAll(RegExp(r'^\+\d{1,3}'), '');
    String fullPhoneNumber = '$_selectedCountryCode$cleanPhoneNumber';
    _controller.updatePhoneNumber(fullPhoneNumber);
  }

  void _showImageSourceActionSheet(BuildContext context) {
    showModalBottomSheet(
      context: context,
      backgroundColor: Colors.transparent,
      builder: (BuildContext context) {
        return Container(
          decoration: const BoxDecoration(
            color: Colors.white,
            borderRadius: BorderRadius.vertical(top: Radius.circular(20)),
          ),
          child: SafeArea(
            child: Column(
              mainAxisSize: MainAxisSize.min,
              children: <Widget>[
                const Padding(
                  padding: EdgeInsets.symmetric(vertical: 16),
                  child: Text(
                    'Select Image Source',
                    style: TextStyle(
                      fontSize: 20,
                      fontWeight: FontWeight.bold,
                    ),
                  ),
                ),
                ListTile(
                  leading: Container(
                    padding: const EdgeInsets.all(8),
                    decoration: BoxDecoration(
                      color: Colors.blue.withOpacity(0.1),
                      borderRadius: BorderRadius.circular(10),
                    ),
                    child: const Icon(Icons.photo_library, color: Colors.blue),
                  ),
                  title: const Text('Choose from Gallery'),
                  onTap: () {
                    _getImage(ImageSource.gallery);
                    Navigator.pop(context);
                  },
                ),
                ListTile(
                  leading: Container(
                    padding: const EdgeInsets.all(8),
                    decoration: BoxDecoration(
                      color: Colors.blue.withOpacity(0.1),
                      borderRadius: BorderRadius.circular(10),
                    ),
                    child: const Icon(Icons.photo_camera, color: Colors.blue),
                  ),
                  title: const Text('Take a Photo'),
                  onTap: () {
                    _getImage(ImageSource.camera);
                    Navigator.pop(context);
                  },
                ),
                const SizedBox(height: 16),
              ],
            ),
          ),
        );
      },
    );
  }

  void _showResultDialog(bool isSuccess) {
    Navigator.push(
      context,
      MaterialPageRoute(
        builder: (context) => AlertScreen(
          arguments: AlertArguments(
            title: isSuccess ? 'Thank You' : 'Oops!',
            message: isSuccess
                ? 'Profile created successfully!'
                : 'Failed to create profile. Please try again.',
            actionTitle: isSuccess ? 'Go to Dashboard' : 'Try Again',
            type: isSuccess ? AlertType.success : AlertType.error,
            onActionPressed: () {
              Navigator.pop(context);
              if (isSuccess) {
                Navigator.pushReplacementNamed(
                  context,
                  RouteNames.patientDashboardScreen,
                );
              }
            },
          ),
        ),
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.grey[50],
      appBar: AppBar(
        elevation: 0,
        backgroundColor: Colors.white,
        title: const Text(
          'Create Profile',
          style: TextStyle(color: Colors.black),
        ),
        actions: [
          Padding(
            padding: const EdgeInsets.all(8.0),
            child: IconButton(
              onPressed: () {
                if (_validateAllFields()) {
                  _controller.savePatientData();
                  _showResultDialog(true);
                } else {
                  _showValidationErrors();
                }
              },
              icon: const Icon(Icons.check, color: Colors.blue, weight: 50),
            ),
          ),
        ],
      ),
      body: SingleChildScrollView(
        child: Column(
          children: [
            Container(
              color: Colors.white,
              padding: const EdgeInsets.all(16.0),
              child: Column(
                children: [
                  GestureDetector(
                    onTap: () => _showImageSourceActionSheet(context),
                    child: Stack(
                      alignment: Alignment.bottomRight,
                      children: [
                        Container(
                          decoration: BoxDecoration(
                            boxShadow: [
                              BoxShadow(
                                color: Colors.blueGrey.withOpacity(0.5),
                                blurRadius: 5,
                                offset: const Offset(0, 2),
                              ),
                            ],
                            shape: BoxShape.circle,
                            border: Border.all(color: Colors.blue, width: 2),
                          ),
                          child: CircleAvatar(
                            radius: 75,
                            backgroundImage:
                                _image != null ? FileImage(_image!) : null,
                            child: _image == null
                                ? const Icon(Icons.person,
                                    size: 50, color: Colors.blue)
                                : null,
                          ),
                        ),
                        Container(
                          padding: const EdgeInsets.all(8),
                          decoration: BoxDecoration(
                            boxShadow: [
                              BoxShadow(
                                color: Colors.blueGrey.withOpacity(0.5),
                                blurRadius: 5,
                                offset: const Offset(0, 2),
                              ),
                            ],
                            color: Colors.blue,
                            shape: BoxShape.circle,
                            border: Border.all(color: Colors.white, width: 2),
                          ),
                          child: const Icon(Icons.camera_alt,
                              size: 20, color: Colors.white),
                        ),
                      ],
                    ),
                  ),
                ],
              ),
            ),
            const SizedBox(height: 8),
            Container(
              margin: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
              decoration: BoxDecoration(
                color: Colors.white,
                borderRadius: BorderRadius.circular(12),
                boxShadow: [
                  BoxShadow(
                    color: Colors.blueGrey.withOpacity(0.5),
                    blurRadius: 10,
                    offset: const Offset(0, 2),
                  ),
                ],
              ),
              child: Padding(
                padding: const EdgeInsets.all(16.0),
                child: Column(
                  children: [
                    _buildUniformField(
                      label: 'Name',
                      icon: Icons.person_outline,
                      child: TextField(
                        controller: _nameController,
                        onChanged: (value) => _controller.updateName(value),
                        decoration: const InputDecoration(
                          border: InputBorder.none,
                          hintText: 'Enter your name',
                        ),
                      ),
                    ),
                    _buildUniformField(
                      label: 'Phone Number',
                      icon: Icons.phone_outlined,
                      child: Row(
                        children: [
                          DropdownButtonHideUnderline(
                            child: DropdownButton<String>(
                              value: _selectedCountryCode,
                              onChanged: (String? newValue) {
                                if (newValue != null) {
                                  setState(() {
                                    _selectedCountryCode = newValue;
                                  });

                                  _updateCombinedPhoneNumber(
                                      _phoneController.text);
                                }
                              },
                              items:
                                  _countryCodes.map<DropdownMenuItem<String>>(
                                (String code) {
                                  return DropdownMenuItem<String>(
                                    value: code,
                                    child: Text(code),
                                  );
                                },
                              ).toList(),
                            ),
                          ),
                          const SizedBox(width: 12),
                          Expanded(
                            child: TextField(
                              controller: _phoneController,
                              onChanged: (value) {
                                _updateCombinedPhoneNumber(value);
                              },
                              keyboardType: TextInputType.phone,
                              decoration: const InputDecoration(
                                border: InputBorder.none,
                                hintText: 'Enter your phone number',
                              ),
                            ),
                          ),
                        ],
                      ),
                    ),
                    _buildUniformField(
                      label: 'Gender',
                      icon: Icons.people_outline,
                      child: DropdownButtonHideUnderline(
                        child: DropdownButton<String>(
                          value: _gender,
                          isExpanded: true,
                          hint: const Text('Select gender'),
                          onChanged: (value) {
                            setState(() => _gender = value);
                            _controller.updateGender(value!);
                          },
                          items: ['Male', 'Female', 'Other']
                              .map<DropdownMenuItem<String>>((String value) {
                            return DropdownMenuItem<String>(
                              value: value,
                              child: Text(value),
                            );
                          }).toList(),
                        ),
                      ),
                    ),
                    _buildUniformField(
                      label: 'Date of Birth',
                      icon: Icons.calendar_today_outlined,
                      child: InkWell(
                        onTap: () async {
                          final DateTime? picked = await showDatePicker(
                            context: context,
                            initialDate: _dateOfBirth ??
                                DateTime.now()
                                    .subtract(const Duration(days: 365 * 18)),
                            firstDate: DateTime(1900),
                            lastDate: DateTime.now()
                                .subtract(const Duration(days: 365 * 18)),
                            builder: (context, child) {
                              return Theme(
                                data: Theme.of(context).copyWith(
                                  colorScheme: const ColorScheme.light(
                                      primary: Colors.blue),
                                ),
                                child: child!,
                              );
                            },
                          );
                          if (picked != null && picked != _dateOfBirth) {
                            setState(() => _dateOfBirth = picked);
                            _controller.updateDateOfBirth(picked);
                          }
                        },
                        child: Container(
                          padding: const EdgeInsets.symmetric(vertical: 12),
                          child: Text(
                            _dateOfBirth != null
                                ? DateFormat('dd/MM/yyyy').format(_dateOfBirth!)
                                : 'Select date of birth',
                            style: TextStyle(
                              color: _dateOfBirth != null
                                  ? Colors.black87
                                  : Colors.grey,
                            ),
                          ),
                        ),
                      ),
                    ),
                  ],
                ),
              ),
            ),
            Container(
                margin: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
                decoration: BoxDecoration(
                  color: Colors.white,
                  borderRadius: BorderRadius.circular(12),
                  boxShadow: [
                    BoxShadow(
                      color: Colors.blueGrey.withOpacity(0.5),
                      blurRadius: 10,
                      offset: const Offset(0, 2),
                    ),
                  ],
                ),
                child: Column(
                  children: [
                    _buildNavigationField(
                      'Address',
                      Icons.location_on,
                      () async {
                        final result = await Navigator.pushNamed(
                          context,
                          RouteNames.patientAdressScreen,
                          arguments: _controller,
                        );
                        if (result == true) {
                          setState(() {});
                        }
                      },
                    ),
                    const Divider(height: 1),
                    _buildNavigationField(
                      'Family Members',
                      Icons.family_restroom_outlined,
                      () => Navigator.pushNamed(
                        context,
                        RouteNames.patientFamilyMembersScreen,
                        arguments: _controller,
                      ),
                    ),
                  ],
                )),
          ],
        ),
      ),
    );
  }

  Widget _buildUniformField({
    required String label,
    required IconData icon,
    required Widget child,
    String? errorKey,
  }) {
    return Container(
      margin: const EdgeInsets.only(bottom: 16),
      decoration: BoxDecoration(
        color: Colors.grey[50],
        borderRadius: BorderRadius.circular(12),
        border: Border.all(
          color: _errors.containsKey(errorKey ?? '')
              ? Colors.red
              : Colors.grey.shade200,
        ),
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Padding(
            padding: const EdgeInsets.only(left: 16, top: 8),
            child: Text(
              label,
              style: TextStyle(
                fontSize: 12,
                fontWeight: FontWeight.w500,
                color: _errors.containsKey(errorKey ?? '')
                    ? Colors.red
                    : Colors.grey[600],
              ),
            ),
          ),
          Padding(
            padding: const EdgeInsets.only(left: 16, right: 16, bottom: 8),
            child: Row(
              children: [
                Icon(
                  icon,
                  size: 20,
                  color: _errors.containsKey(errorKey ?? '')
                      ? Colors.red
                      : Colors.blue,
                ),
                const SizedBox(width: 12),
                Expanded(child: child),
              ],
            ),
          ),
          if (_errors.containsKey(errorKey ?? ''))
            Padding(
              padding: const EdgeInsets.only(left: 16, right: 16, bottom: 8),
              child: Text(
                _errors[errorKey]!,
                style: const TextStyle(
                  color: Colors.red,
                  fontSize: 12,
                ),
              ),
            ),
        ],
      ),
    );
  }

  bool _validateAllFields() {
    setState(() {
      _errors.clear();
      _hasErrors = false;

      final name = _nameController.text.trim();
      if (name.isEmpty) {
        _errors['name'] = 'Name is required';
        _hasErrors = true;
      } else if (name.length < 2 &&
          RegExp(r'^[A-Za-z]+([.\s]?[A-Za-z]+)*$').hasMatch(name)) {
        _errors['name'] = 'Name must be at least 2 characters';
        _hasErrors = true;
      }

      final phoneNumber = _phoneController.text.trim();
      if (phoneNumber.isEmpty) {
        _errors['phone'] = 'Phone number is required';
        _hasErrors = true;
      } else if (!RegExp(r'^\d{10}$').hasMatch(phoneNumber)) {
        _errors['phone'] = 'Enter a valid 10-digit phone number';
        _hasErrors = true;
      }

      if (_gender == null) {
        _errors['gender'] = 'Please select a gender';
        _hasErrors = true;
      }

      if (_dateOfBirth == null) {
        _errors['dob'] = 'Date of Birth is required';
        _hasErrors = true;
      } else {
        final age = DateTime.now().difference(_dateOfBirth!).inDays ~/ 365;
        if (age < 18) {
          _errors['dob'] = 'User must be at least 18 years old';
          _hasErrors = true;
        }
      }

      if (_image == null) {
        _errors['image'] = 'Profile picture is required';
        _hasErrors = true;
      }

      // Validate required address fields
      final address = _controller.model.address;
      if (address.houseNo?.isEmpty ?? true) {
        _errors['address'] = 'Please complete all required address fields';
        _hasErrors = true;
      }

      // Validate address type and other label
      if (address.addressType == 'Other' &&
          (address.otherLabel?.isEmpty ?? true)) {
        _errors['address'] = 'Please specify other address label';
        _hasErrors = true;
      }
    });

    return !_hasErrors;
  }

  void _showValidationErrors() {
    showDialog(
      context: context,
      builder: (context) => AlertDialog(
        title: const Row(
          children: [
            Icon(Icons.error_outline, color: Colors.red),
            SizedBox(width: 8),
            Text('Validation Errors'),
          ],
        ),
        content: SingleChildScrollView(
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            mainAxisSize: MainAxisSize.min,
            children: _errors.entries
                .map((error) => Padding(
                      padding: const EdgeInsets.symmetric(vertical: 4),
                      child: Text(
                        '• ${error.value}',
                        style: const TextStyle(color: Colors.red),
                      ),
                    ))
                .toList(),
          ),
        ),
        actions: [
          TextButton(
            onPressed: () => Navigator.pop(context),
            child: const Text('OK'),
          ),
        ],
      ),
    );
  }

  Widget _buildNavigationField(
      String label, IconData icon, VoidCallback onTap) {
    bool isAddressField = label == 'Address';
    bool hasAddressError = _errors.containsKey('address');

    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        ListTile(
          leading: Container(
            padding: const EdgeInsets.all(8),
            decoration: BoxDecoration(
              color: (isAddressField && hasAddressError)
                  ? Colors.red.withOpacity(0.1)
                  : Colors.blue.withOpacity(0.1),
              borderRadius: BorderRadius.circular(8),
            ),
            child: Icon(icon,
                color: (isAddressField && hasAddressError)
                    ? Colors.red
                    : Colors.blue,
                size: 24),
          ),
          title: Text(
            label,
            style: TextStyle(
              fontSize: 16,
              fontWeight: FontWeight.w500,
              color: (isAddressField && hasAddressError)
                  ? Colors.red
                  : Colors.black,
            ),
          ),
          subtitle: isAddressField ? _buildAddressSubtitle() : null,
          trailing: Icon(
            Icons.chevron_right,
            color:
                (isAddressField && hasAddressError) ? Colors.red : Colors.blue,
          ),
          onTap: onTap,
        ),
        if (isAddressField && hasAddressError)
          Padding(
            padding: const EdgeInsets.only(left: 16, right: 16, bottom: 8),
            child: Text(
              _errors['address']!,
              style: const TextStyle(
                color: Colors.red,
                fontSize: 12,
              ),
            ),
          ),
      ],
    );
  }

  Widget _buildAddressSubtitle() {
    final address = _controller.model.address;
    if (address.houseNo == null ||
        address.line == null ||
        address.city == null) {
      return const Text(
        'No address added',
        style: TextStyle(color: Colors.grey),
      );
    }

    return Text(
      '${address.houseNo}, ${address.line}\n'
      '${address.city}, ${address.state} ${address.pincode}\n'
      '${address.addressType}${address.addressType == "Other" ? ": ${address.otherLabel}" : ""}',
      style: const TextStyle(color: Colors.black87),
    );
  }
}