import 'package:flutter/material.dart';
import 'package:flutter_contacts/flutter_contacts.dart';
import 'package:url_launcher/url_launcher.dart';
import '../contacts/contact_state.dart';
import '../../../domain/services/obfuscate_service.dart';
import '../../common/widgets/obfuscated_avatar.dart';
import '../../../core/utils/color_utils.dart';
import '../../../domain/services/call_service.dart';
import '../../../domain/services/block_service.dart';
import 'widgets/contact_modal.dart';
import 'widgets/alphabet_scroll_page.dart';

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

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

class _ContactPageState extends State<ContactPage> {
  final ObfuscateService _obfuscateService = ObfuscateService();
  final CallService _callService = CallService();
  int? _expandedIndex;
  
  Future<void> _refreshContacts() async {
    final contactState = ContactState.of(context);
    try {
      await contactState.fetchContacts();
    } catch (e) {
      debugPrint('Error refreshing contacts: $e');
      if (mounted) {
        ScaffoldMessenger.of(context)
            .showSnackBar(SnackBar(content: Text('Failed to refresh contacts')));
      }
    }
  }

  void _toggleFavorite(Contact contact) async {
    try {
      if (await FlutterContacts.requestPermission()) {
        Contact? fullContact = await FlutterContacts.getContact(contact.id,
            withProperties: true,
            withAccounts: true,
            withPhoto: true,
            withThumbnail: true);

        if (fullContact != null) {
          fullContact.isStarred = !fullContact.isStarred;
          await FlutterContacts.updateContact(fullContact);
        }
        await _refreshContacts();
      } else {
        debugPrint("Could not fetch contact details");
      }
    } catch (e) {
      debugPrint("Error updating favorite status: $e");
      ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(content: Text('Failed to update favorite status')));
    }
  }

  @override
  Widget build(BuildContext context) {
    final contactState = ContactState.of(context);
    
    if (contactState.loading) {
      return const Center(child: CircularProgressIndicator());
    }
    
    final contacts = contactState.contacts;
    
    if (contacts.isEmpty) {
      return const Center(
        child: Text(
          'No contacts found.\nAdd contacts to get started.',
          style: TextStyle(color: Colors.white60),
          textAlign: TextAlign.center,
        ),
      );
    }

    return Scaffold(
      backgroundColor: Colors.black,
      body: AlphabetScrollPage(
        scrollOffset: contactState.scrollOffset,
        contacts: contacts,
      ),
    );
  }

  Widget _getCallIcon(Contact contact) {
    if (!contact.phones.isNotEmpty) return const SizedBox.shrink();
    return Icon(
      contact.isStarred ? Icons.star : Icons.star_border,
      color: contact.isStarred ? Colors.amber : Colors.grey,
    );
  }

  Future<void> _launchSms(Contact contact) async {
    if (!contact.phones.isNotEmpty) {
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(content: Text('No phone number available')),
      );
      return;
    }

    final Uri smsUri = Uri(
      scheme: 'sms',
      path: contact.phones.first.number,
    );
    
    if (await canLaunchUrl(smsUri)) {
      await launchUrl(smsUri);
    } else {
      if (!mounted) return;
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(content: Text('Could not launch SMS')),
      );
    }
  }

  void _editContact(Contact contact) async {
    if (await FlutterContacts.requestPermission()) {
      final updatedContact = await FlutterContacts.openExternalEdit(contact.id);
      if (updatedContact != null) {
        await _refreshContacts();
        setState(() => _expandedIndex = null);
        if (!mounted) return;
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(content: Text('${contact.displayName} updated successfully!')),
        );
      }
    }
  }

  void _toggleBlock(Contact contact, bool isBlocked) async {
    if (!contact.phones.isNotEmpty) {
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(content: Text('No phone number to block')),
      );
      return;
    }

    final phoneNumber = contact.phones.first.number;
    if (isBlocked) {
      await BlockService().unblockNumber(phoneNumber);
      if (!mounted) return;
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text('$phoneNumber unblocked')),
      );
    } else {
      await BlockService().blockNumber(phoneNumber);
      if (!mounted) return;
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text('$phoneNumber blocked')),
      );
    }
    setState(() {});
  }

  void _showContactModal(Contact contact) {
    showModalBottomSheet(
      context: context,
      isScrollControlled: true,
      backgroundColor: Colors.transparent,
      builder: (context) => ContactModal(
        contact: contact,
        onEdit: () async {
          if (await FlutterContacts.requestPermission()) {
            final updatedContact = await FlutterContacts.openExternalEdit(contact.id);
            if (updatedContact != null) {
              await _refreshContacts();
              Navigator.of(context).pop();
              ScaffoldMessenger.of(context).showSnackBar(
                SnackBar(content: Text('${contact.displayName} updated successfully!')),
              );
            }
          }
        },
        onToggleFavorite: () => _toggleFavorite(contact),
        isFavorite: contact.isStarred,
      ),
    );
  }

  Widget _buildActionButton({
    required IconData icon,
    required String label,
    required VoidCallback onPressed,
  }) {
    return InkWell(
      onTap: onPressed,
      child: Padding(
        padding: const EdgeInsets.symmetric(vertical: 8.0, horizontal: 12.0),
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            Icon(icon, color: Colors.white),
            const SizedBox(height: 4),
            Text(
              label,
              style: const TextStyle(
                color: Colors.white,
                fontSize: 12,
              ),
            ),
          ],
        ),
      ),
    );
  }
}