import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:go_router/go_router.dart';

import '../../core/network/api_client.dart';
import '../../core/theme/app_theme.dart';
import '../../core/widgets/game_ui.dart';

/// صفحه‌ی دورهمی: پیوستن با شماره میز یا ساختِ میز جدید.
class PrivateEntryScreen extends StatefulWidget {
  final ApiClient api;
  const PrivateEntryScreen({super.key, required this.api});

  @override
  State<PrivateEntryScreen> createState() => _PrivateEntryScreenState();
}

class _PrivateEntryScreenState extends State<PrivateEntryScreen> {
  final _code = TextEditingController();
  int _remaining = 0;
  bool _unlimited = false;
  bool _loading = true;

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

  @override
  void dispose() {
    _code.dispose();
    super.dispose();
  }

  Future<void> _loadInfo() async {
    try {
      final res = await widget.api.dio.get('/tables/info');
      final d = res.data as Map;
      setState(() {
        _remaining = (d['remaining'] ?? 0) as int;
        _unlimited = (d['unlimited'] ?? false) as bool;
        _loading = false;
      });
    } catch (_) {
      setState(() => _loading = false);
    }
  }

  bool get _canCreate => _unlimited || _remaining > 0;

  void _join() {
    final code = _code.text.trim();
    if (code.length < 4) return;
    context.push('/private/room?join=$code');
  }

  void _create() {
    if (!_canCreate) {
      ScaffoldMessenger.of(context).showSnackBar(const SnackBar(
          content: Text('سهمیه‌ی میزهای رایگان تمام شده؛ با VIP نامحدود بسازید')));
      return;
    }
    context.push('/private/room?create=1').then((_) => _loadInfo());
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: GameBackground(
        child: SafeArea(
          child: Column(
            children: [
              Align(
                alignment: Alignment.centerRight,
                child: Padding(
                  padding: const EdgeInsets.all(10),
                  child: GestureDetector(
                    onTap: () => context.pop(),
                    child: Container(
                      width: 46,
                      height: 46,
                      decoration: BoxDecoration(
                        color: AppColors.panel,
                        borderRadius: BorderRadius.circular(12),
                        border: Border.all(color: AppColors.gold, width: 1.5),
                      ),
                      child: const Icon(Icons.arrow_back, color: AppColors.gold),
                    ),
                  ),
                ),
              ),
              Expanded(
                child: SingleChildScrollView(
                  padding: const EdgeInsets.symmetric(horizontal: 24),
                  child: Column(
                    children: [
                      const SizedBox(height: 8),
                      const Icon(Icons.person, color: AppColors.gold, size: 56),
                      const SizedBox(height: 12),
                      TextField(
                        controller: _code,
                        textAlign: TextAlign.center,
                        keyboardType: TextInputType.number,
                        style: const TextStyle(fontSize: 22, letterSpacing: 6),
                        inputFormatters: [
                          FilteringTextInputFormatter.digitsOnly,
                          LengthLimitingTextInputFormatter(5),
                        ],
                        decoration: const InputDecoration(hintText: 'شماره میز'),
                        onChanged: (_) => setState(() {}),
                      ),
                      const SizedBox(height: 16),
                      GameButton(
                        label: 'پیوستن',
                        width: double.infinity,
                        colors: const [Color(0xFFC2185B), Color(0xFF6A0D38)],
                        onTap: _code.text.trim().length >= 4 ? _join : null,
                      ),
                      const SizedBox(height: 8),
                      const Text('برای ورود، شماره میز را وارد کنید.',
                          style: TextStyle(color: Colors.white60, fontSize: 13)),
                      const SizedBox(height: 24),
                      Divider(color: AppColors.goldDark.withValues(alpha: 0.5)),
                      const SizedBox(height: 16),
                      Text(
                        _loading
                            ? '...'
                            : _unlimited
                                ? 'میزهای نامحدود (VIP)'
                                : 'میزهای رایگان باقیمانده: $_remaining',
                        style: const TextStyle(
                            color: AppColors.gold,
                            fontSize: 14,
                            fontWeight: FontWeight.bold),
                      ),
                      const SizedBox(height: 12),
                      const Icon(Icons.groups, color: AppColors.gold, size: 56),
                      const SizedBox(height: 12),
                      GameButton(
                        label: 'ساخت میز',
                        width: double.infinity,
                        colors: _canCreate
                            ? const [Color(0xFFC2185B), Color(0xFF6A0D38)]
                            : const [Color(0xFF555555), Color(0xFF333333)],
                        onTap: _loading ? null : _create,
                      ),
                      const SizedBox(height: 8),
                      const Text('میز جدید بساز و دوستانت را دعوت کن',
                          style: TextStyle(color: Colors.white60, fontSize: 13)),
                      const SizedBox(height: 24),
                    ],
                  ),
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}