import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
import '/data/models/contact_model.dart';

class ContactTile extends StatefulWidget {
  final Contact contact;
  final VoidCallback? onTap;

  const ContactTile({super.key, required this.contact, this.onTap});

  @override
  State<ContactTile> createState() => _ContactTileState();
}

class _ContactTileState extends State<ContactTile> {
  SharedPreferences? _prefs;
  

    Duration? offset;
  

  @override
  void initState() {
    super.initState();
    DateTime now = DateTime.now();
    offset = now.timeZoneOffset;
    _initPrefs();
  }

  Future<void> _initPrefs() async {
    final shared = await SharedPreferences.getInstance();
    if (mounted) {
      setState(() {
        _prefs = shared;
      });
    }
  }

  String get displayName {
    if (_prefs == null) return widget.contact.name;

    final id = widget.contact.id;
    final savedName = _prefs!.getString('firstname_$id');
    final savedSurname = _prefs!.getString('lastname_$id');

    final name = savedName ?? widget.contact.name;
    final surname = savedSurname ?? widget.contact.surname;

    final full =
        '${name != 'Unknown' ? name : ''} ${surname != 'Unknown' ? surname : ''}'
            .trim();

    if (full.isNotEmpty) return full;
    if (widget.contact.username != 'Unknown') return widget.contact.username;
    return 'User';
  }

  @override
  Widget build(BuildContext context) {
    final primary = Theme.of(context).colorScheme.primary;

    final username = widget.contact.username;
    final initials =
        (displayName.isNotEmpty
                ? displayName
                : (username != 'Unknown' ? username : 'U'))
            .trim()
            .split(RegExp(r'\s+'))
            .where((p) => p.isNotEmpty)
            .take(2)
            .map((p) => p[0].toUpperCase())
            .join();

    return ListTile(
      onTap: widget.onTap,
      contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 4),
      leading: CircleAvatar(
        radius: 28,
        backgroundColor: primary.withAlpha((0.1 * 255).round()),
        backgroundImage: widget.contact.effectiveAvatarUrl != null
            ? NetworkImage(widget.contact.effectiveAvatarUrl!)
            : null,
        child: widget.contact.effectiveAvatarUrl == null
            ? Text(
                initials,
                style: TextStyle(
                  color: Theme.of(context).colorScheme.primary,
                  fontWeight: FontWeight.bold,
                ),
              )
            : null,
      ),
      title: Text(
        displayName,
        style: const TextStyle(fontWeight: FontWeight.bold, fontSize: 16),
      ),
      subtitle: Text(
        widget.contact.isLastMsgDecrypted
            ? widget.contact.lastMessage ?? "Нет сообщений"
            : (widget.contact.lastMessage != null
                  ? "Ожидание дешифровки..."
                  : "Нет сообщений"),
        maxLines: 1,
        overflow: TextOverflow.ellipsis,
        style: const TextStyle(color: Colors.grey),
      ),
      trailing: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        crossAxisAlignment: CrossAxisAlignment.end,
        children: [
          Text(
            _formatTime(widget.contact.lastMessageTime),
            style: const TextStyle(color: Colors.grey, fontSize: 12),
          ),
          const SizedBox(height: 4),
          if (widget.contact.unreadCount > 0)
            Container(
              padding: const EdgeInsets.all(6),
              decoration: BoxDecoration(
                color: primary.withAlpha((0.5 * 255).round()),
                shape: BoxShape.circle,
              ),
              child: Text(
                '${widget.contact.unreadCount}',
                style: const TextStyle(color: Colors.white, fontSize: 10),
              ),
            ),
        ],
      ),
    );
  }

  String _formatTime(DateTime? time) {
    if (time == null) return "";
    time = time.add(offset!);
    return "${time.hour}:${time.minute.toString().padLeft(2, '0')}";
  }
}