import 'package:flutter/material.dart';
import 'package:flutter_contacts/flutter_contacts.dart';
import 'contact_service.dart';

class ContactState extends StatefulWidget {
  final Widget child;

  const ContactState({super.key, required this.child});

  static _ContactStateState of(BuildContext context) {
    return context.dependOnInheritedWidgetOfExactType<_InheritedContactState>()!.data;
  }

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

class _ContactStateState extends State<ContactState> {
  final ContactService _contactService = ContactService();
  List<Contact> _contacts = [];
  bool _loading = true;
  double _scrollOffset = 0.0;
  Contact? _selfContact = Contact();

  List<Contact> get contacts => _contacts;
  bool get loading => _loading;
  double get scrollOffset => _scrollOffset;
  Contact? get selfContact => _selfContact;

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

    // Add listener for contact changes
    FlutterContacts.addListener(_onContactChange);
  }

  void _onContactChange() => _fetchContacts();

  @override
  void dispose() {
    // Remove listener
    FlutterContacts.removeListener(_onContactChange);
    super.dispose();
  }

  Future<void> _fetchContacts() async {
    List<Contact> contacts = await _contactService.fetchContacts();

    debugPrint("Fetched ${contacts.length} contacts");

    // Find selfContact before filtering
    _selfContact = contacts.firstWhere(
      (contact) => contact.displayName.toLowerCase() == "user",
      orElse: () => Contact(),
    );
    if (_selfContact!.phones.isEmpty) {
      debugPrint("Self contact has no phone numbers");
      _selfContact = null;
    }

    contacts = contacts.where((contact) => contact.phones.isNotEmpty).toList();
    contacts.sort((a, b) => a.displayName.compareTo(b.displayName));
    setState(() {
      _contacts = contacts;
      _loading = false;
      _selfContact = _selfContact;
    });
  }

  Future<void> addNewContact(Contact contact) async {
    await _contactService.addNewContact(contact);
    await _fetchContacts();
  }

  void setScrollOffset(double offset) {
    setState(() {
      _scrollOffset = offset;
    });
  }

  @override
  Widget build(BuildContext context) {
    return _InheritedContactState(
      data: this,
      child: widget.child,
    );
  }
}

class _InheritedContactState extends InheritedWidget {
  final _ContactStateState data;

  const _InheritedContactState({required this.data, required super.child});

  @override
  bool updateShouldNotify(_InheritedContactState oldWidget) => true;
}