import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:cloud_firestore/cloud_firestore.dart';

class ProfileScreen extends ConsumerStatefulWidget {
  const ProfileScreen({super.key});

  @override
  ConsumerState<ProfileScreen> createState() => _ProfileScreenState();
}

class _ProfileScreenState extends ConsumerState<ProfileScreen> {
  bool _isEditing = false;
  final _nameController = TextEditingController();
  String? _photoUrl;
  bool _isLoading = true;

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

  Future<void> _loadProfile() async {
    final user = FirebaseAuth.instance.currentUser;
    if (user != null) {
      _nameController.text = user.displayName ?? '';
      _photoUrl = user.photoURL;
    }
    setState(() => _isLoading = false);
  }

  Future<void> _saveProfile() async {
    final user = FirebaseAuth.instance.currentUser;
    if (user != null) {
      await user.updateDisplayName(_nameController.text);
      await FirebaseFirestore.instance
          .collection('users')
          .doc(user.uid)
          .update({
        'displayName': _nameController.text,
        'updatedAt': Timestamp.now(),
      });

      setState(() => _isEditing = false);

      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(
            content: Text('✅ Профиль сохранён'),
            backgroundColor: Colors.green,
          ),
        );
      }
    }
  }

  @override
  Widget build(BuildContext context) {
    if (_isLoading) {
      return const Scaffold(
        body: Center(child: CircularProgressIndicator()),
      );
    }

    final user = FirebaseAuth.instance.currentUser;

    return Scaffold(
      appBar: AppBar(
        title: const Text('Профиль'),
        actions: [
          IconButton(
            icon: Icon(_isEditing ? Icons.check : Icons.edit),
            onPressed: () {
              if (_isEditing) {
                _saveProfile();
              } else {
                setState(() => _isEditing = true);
              }
            },
            tooltip: _isEditing ? 'Сохранить' : 'Редактировать',
          ),
        ],
      ),
      body: ListView(
        padding: const EdgeInsets.all(16),
        children: [
          // Аватар
          Center(
            child: Stack(
              children: [
                CircleAvatar(
                  radius: 60,
                  backgroundColor: Colors.blue,
                  backgroundImage: _photoUrl != null
                      ? NetworkImage(_photoUrl!)
                      : null,
                  child: _photoUrl == null
                      ? Text(
                          user?.displayName?.substring(0, 1).toUpperCase() ??
                              'U',
                          style: const TextStyle(
                            fontSize: 40,
                            color: Colors.white,
                            fontWeight: FontWeight.bold,
                          ),
                        )
                      : null,
                ),
                if (_isEditing)
                  Positioned(
                    bottom: 0,
                    right: 0,
                    child: Container(
                      padding: const EdgeInsets.all(4),
                      decoration: const BoxDecoration(
                        color: Colors.blue,
                        shape: BoxShape.circle,
                      ),
                      child: const Icon(
                        Icons.camera_alt,
                        color: Colors.white,
                        size: 20,
                      ),
                    ),
                  ),
              ],
            ),
          ),
          const SizedBox(height: 24),

          // Имя
          TextField(
            controller: _nameController,
            enabled: _isEditing,
            decoration: const InputDecoration(
              labelText: 'Имя',
              border: OutlineInputBorder(),
              prefixIcon: Icon(Icons.person),
            ),
          ),
          const SizedBox(height: 16),

          // Email
          ListTile(
            leading: const Icon(Icons.email),
            title: const Text('Email'),
            subtitle: Text(user?.email ?? 'Не указан'),
            enabled: false,
          ),

          // UID
          ListTile(
            leading: const Icon(Icons.fingerprint),
            title: const Text('User ID'),
            subtitle: Text(user?.uid ?? 'Неизвестно'),
            enabled: false,
          ),

          const Divider(height: 32),

          // Статистика
          _buildStatCard(
            'Статистика',
            [
              _buildStatRow('Задач создано', '12'),
              _buildStatRow('Mind-карт', '5'),
              _buildStatRow('Будильников', '3'),
              _buildStatRow('Дней в приложении', '30'),
            ],
          ),

          const SizedBox(height: 24),

          // Кнопка выхода
          OutlinedButton.icon(
            onPressed: () async {
              await FirebaseAuth.instance.signOut();
            },
            icon: const Icon(Icons.logout, color: Colors.red),
            label: const Text('Выйти', style: TextStyle(color: Colors.red)),
          ),
        ],
      ),
    );
  }

  Widget _buildStatCard(String title, List<Widget> children) {
    return Container(
      padding: const EdgeInsets.all(16),
      decoration: BoxDecoration(
        color: Theme.of(context).cardColor,
        borderRadius: BorderRadius.circular(12),
        boxShadow: [
          BoxShadow(
            color: Colors.black.withOpacity(0.05),
            blurRadius: 8,
            offset: const Offset(0, 2),
          ),
        ],
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Text(
            title,
            style: Theme.of(context).textTheme.titleMedium?.copyWith(
                  fontWeight: FontWeight.bold,
                ),
          ),
          const SizedBox(height: 16),
          ...children,
        ],
      ),
    );
  }

  Widget _buildStatRow(String label, String value) {
    return Padding(
      padding: const EdgeInsets.symmetric(vertical: 4),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        children: [
          Text(label, style: TextStyle(color: Colors.grey[600])),
          Text(
            value,
            style: const TextStyle(
              fontWeight: FontWeight.bold,
              fontSize: 16,
            ),
          ),
        ],
      ),
    );
  }
}