import 'package:flutter/material.dart';
import 'package:flutter_contacts/flutter_contacts.dart';
import 'package:url_launcher/url_launcher.dart';
import '../../services/contact_service.dart';
import '../../services/obfuscate_service.dart';
import '../../services/call_service.dart';

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

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

class _CompositionPageState extends State<CompositionPage> {
  String dialedNumber = "";
  List<Contact> _allContacts = [];
  List<Contact> _filteredContacts = [];
  final ContactService _contactService = ContactService();
  final ObfuscateService _obfuscateService = ObfuscateService();
  final CallService _callService = CallService();

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

  Future<void> _fetchContacts() async {
    _allContacts = await _contactService.fetchContacts();
    _filteredContacts = _allContacts;
    setState(() {});
  }

  void _filterContacts() {
    setState(() {
      _filteredContacts = _allContacts.where((contact) {
        bool phoneMatch = contact.phones.any((phone) {
          final rawPhoneNumber = phone.number;
          final strippedPhoneNumber = rawPhoneNumber.replaceAll(RegExp(r'\D'), '');
          final strippedDialedNumber = dialedNumber.replaceAll(RegExp(r'\D'), '');
          return rawPhoneNumber.contains(dialedNumber) ||
                 strippedPhoneNumber.contains(strippedDialedNumber);
        });
        final nameMatch = contact.displayName
            .toLowerCase()
            .contains(dialedNumber.toLowerCase());
        return phoneMatch || nameMatch;
      }).toList();
    });
  }

  void _onNumberPress(String number) {
    setState(() {
      dialedNumber += number;
      _filterContacts();
    });
  }

  void _onPlusPress() {
    setState(() {
      dialedNumber += '+';
      _filterContacts();
    });
  }

  void _onDeletePress() {
    setState(() {
      if (dialedNumber.isNotEmpty) {
        dialedNumber = dialedNumber.substring(0, dialedNumber.length - 1);
        _filterContacts();
      }
    });
  }

  void _onClearPress() {
    setState(() {
      dialedNumber = "";
      _filteredContacts = _allContacts;
    });
  }

  void _makeCall(String phoneNumber) async {
    try {
      await _callService.makeGsmCall(context, phoneNumber: phoneNumber);
      setState(() {
        dialedNumber = phoneNumber;
      });
    } catch (e) {
      debugPrint("Error making call: $e");
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text('Failed to make call: $e')),
      );
    }
  }

  void _launchSms(String phoneNumber) async {
    final uri = Uri(scheme: 'sms', path: phoneNumber);
    if (await canLaunchUrl(uri)) {
      await launchUrl(uri);
    } else {
      debugPrint('Could not send SMS to $phoneNumber');
    }
  }

  void _addContact() async {
    if (await FlutterContacts.requestPermission()) {
      final newContact = Contact()
        ..phones = [Phone(dialedNumber.isNotEmpty ? dialedNumber : '')];
      final updatedContact = await FlutterContacts.openExternalInsert(newContact);
      if (updatedContact != null) {
        _fetchContacts();
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(content: Text('Contact added successfully!')),
        );
      }
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.black,
      body: Stack(
        children: [
          Column(
            children: [
              Expanded(
                flex: 2,
                child: Container(
                  padding: const EdgeInsets.only(
                      top: 42.0, left: 16.0, right: 16.0, bottom: 16.0),
                  color: Colors.black,
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Expanded(
                        child: ListView(
                          children: [
                            ..._filteredContacts.map((contact) {
                              final phoneNumber = contact.phones.isNotEmpty
                                  ? contact.phones.first.number
                                  : 'No phone number';
                              return ListTile(
                                title: Text(
                                  _obfuscateService.obfuscateData(contact.displayName),
                                  style: const TextStyle(color: Colors.white),
                                ),
                                subtitle: Text(
                                  _obfuscateService.obfuscateData(phoneNumber),
                                  style: const TextStyle(color: Colors.grey),
                                ),
                                trailing: Row(
                                  mainAxisSize: MainAxisSize.min,
                                  children: [
                                    IconButton(
                                      icon: Icon(Icons.phone, color: Colors.green[300], size: 20),
                                      onPressed: () => _makeCall(phoneNumber),
                                    ),
                                    IconButton(
                                      icon: Icon(Icons.message, color: Colors.blue[300], size: 20),
                                      onPressed: () => _launchSms(phoneNumber),
                                    ),
                                  ],
                                ),
                                onTap: () {},
                              );
                            }).toList(),
                            ListTile(
                              title: const Text(
                                'Add a contact',
                                style: TextStyle(color: Colors.white),
                              ),
                              trailing: Icon(Icons.add, color: Colors.grey[600]),
                              onTap: _addContact,
                            ),
                          ],
                        ),
                      ),
                    ],
                  ),
                ),
              ),
              Expanded(
                flex: 2,
                child: Container(
                  padding: const EdgeInsets.symmetric(horizontal: 16.0),
                  child: Column(
                    mainAxisAlignment: MainAxisAlignment.start,
                    children: [
                      Row(
                        mainAxisAlignment: MainAxisAlignment.spaceBetween,
                        children: [
                          Expanded(
                            child: Align(
                              alignment: Alignment.center,
                              child: Text(
                                dialedNumber,
                                style: const TextStyle(fontSize: 24, color: Colors.white),
                                overflow: TextOverflow.ellipsis,
                              ),
                            ),
                          ),
                          GestureDetector(
                            onTap: _onDeletePress,
                            onLongPress: _onClearPress,
                            child: const Padding(
                              padding: EdgeInsets.all(8.0),
                              child: Icon(Icons.backspace, color: Colors.white),
                            ),
                          ),
                        ],
                      ),
                      const SizedBox(height: 10),
                      Expanded(
                        child: SingleChildScrollView(
                          child: Column(
                            mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                            children: [
                              Row(
                                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                                children: [
                                  _buildDialButton('1', Colors.white),
                                  _buildDialButton('2', Colors.white),
                                  _buildDialButton('3', Colors.white),
                                ],
                              ),
                              Row(
                                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                                children: [
                                  _buildDialButton('4', Colors.white),
                                  _buildDialButton('5', Colors.white),
                                  _buildDialButton('6', Colors.white),
                                ],
                              ),
                              Row(
                                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                                children: [
                                  _buildDialButton('7', Colors.white),
                                  _buildDialButton('8', Colors.white),
                                  _buildDialButton('9', Colors.white),
                                ],
                              ),
                              Row(
                                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                                children: [
                                  _buildDialButton('*', const Color.fromRGBO(117, 117, 117, 1)),
                                  _buildDialButtonWithPlus('0'),
                                  _buildDialButton('#', const Color.fromRGBO(117, 117, 117, 1)),
                                ],
                              ),
                            ],
                          ),
                        ),
                      ),
                    ],
                  ),
                ),
              ),
            ],
          ),
          Positioned(
            bottom: 20.0,
            left: 0,
            right: 0,
            child: Center(
              child: ElevatedButton(
                onPressed: dialedNumber.isNotEmpty ? () => _makeCall(dialedNumber) : null,
                style: ElevatedButton.styleFrom(
                  backgroundColor: Colors.green[700],
                  shape: const CircleBorder(),
                  padding: const EdgeInsets.all(20),
                ),
                child: const Icon(Icons.phone, color: Colors.white, size: 30),
              ),
            ),
          ),
          Positioned(
            top: 40.0,
            left: 16.0,
            child: IconButton(
              icon: const Icon(Icons.arrow_back, color: Colors.white),
              onPressed: () => Navigator.pop(context),
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildDialButton(String number, Color textColor) {
    return ElevatedButton(
      onPressed: () => _onNumberPress(number),
      style: ElevatedButton.styleFrom(
        backgroundColor: Colors.black,
        shape: const CircleBorder(),
        padding: const EdgeInsets.all(16),
      ),
      child: Text(
        number,
        style: TextStyle(fontSize: 24, color: textColor),
      ),
    );
  }

  Widget _buildDialButtonWithPlus(String number) {
    return Stack(
      alignment: Alignment.center,
      children: [
        GestureDetector(
          onLongPress: _onPlusPress,
          child: ElevatedButton(
            onPressed: () => _onNumberPress(number),
            style: ElevatedButton.styleFrom(
              backgroundColor: Colors.black,
              shape: const CircleBorder(),
              padding: const EdgeInsets.all(16),
            ),
            child: Text(
              number,
              style: const TextStyle(fontSize: 24, color: Colors.white),
            ),
          ),
        ),
        Positioned(
          bottom: 8,
          child: Text(
            '+',
            style: TextStyle(fontSize: 12, color: Colors.grey[600]),
          ),
        ),
      ],
    );
  }
}