import 'package:flutter/material.dart';
import 'package:inventory_system/screens/bottom_nav_bar.dart';
import 'package:inventory_system/screens/title_bar.dart';
import 'package:inventory_system/services/auth_service.dart';
import 'package:inventory_system/screens/nav_bar.dart';
import 'package:inventory_system/services/session_manager.dart';

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

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

class _ProfileScreenState extends State<ProfileScreen> {
  final AuthService _authService = AuthService();
  late Future<Map<String, dynamic>> _userProfileFuture;

  @override
  void initState() {
    super.initState();
    _userProfileFuture = _authService.fetchUserProfile();
  }

  @override
  Widget build(BuildContext context) {
    final isAdmin = SessionManager.instance.currentUser?['isAdmin'] ?? false;

    return Scaffold(
      backgroundColor: const Color(0xFFF5F5F7),
      appBar: const TitleBar(title: 'Profile'),
      drawer: NavBar(isAdmin: isAdmin, selectedScreen: AppScreen.profile),
      body: FutureBuilder<Map<String, dynamic>>(
        future: _userProfileFuture,
        builder: (context, snapshot) {
          if (snapshot.connectionState == ConnectionState.waiting) {
            return const Center(child: CircularProgressIndicator());
          }
          if (snapshot.hasError) {
             return Center(child: Text('Error: ${snapshot.error}'));
          }
          
          final data = snapshot.data;
          if (data == null || data['success'] != true) {
            return Center(child: Text(data?['message'] ?? 'Failed to load profile'));
          }

          final userInfo = data['data'];

          return SingleChildScrollView(
            padding: const EdgeInsets.all(24.0),
            child: Column(
              children: [
                const SizedBox(height: 20),
                // Avatar
                Container(
                  width: 100,
                  height: 100,
                  decoration: BoxDecoration(
                    color: Colors.white,
                    shape: BoxShape.circle,
                    boxShadow: [
                      BoxShadow(
                         color: Colors.black.withOpacity(0.1),
                         blurRadius: 10,
                         offset: const Offset(0, 5),
                      ),
                    ],
                  ),
                  child: const Icon(Icons.person, size: 60, color: Colors.grey),
                ),
                const SizedBox(height: 30),
                
                _buildInfoCard(userInfo),
              ],
            ),
          );
        },
      ),
      bottomNavigationBar: BottomNavBar(
        selectedIndex: 2,
        onItemTapped: (index) {
          // Handled by BottomNavBar internal logic
        },
      ),
    );
  }

  Widget _buildInfoCard(Map<String, dynamic> user) {
     final email = user['email'] ?? 'N/A';
     final company = user['company'] ?? 'N/A';
     final departmentObj = user['department'];
     String deptName = 'N/A';
     if (departmentObj != null) {
       deptName = departmentObj['departmentName'] ?? 'N/A';
     }
     final roles = user['role'] as List<dynamic>?;
     final roleStr = roles?.join(', ') ?? 'N/A';

     return Container(
       width: double.infinity,
       padding: const EdgeInsets.all(24),
       decoration: BoxDecoration(
         color: Colors.white,
         borderRadius: BorderRadius.circular(20),
         boxShadow: [
            BoxShadow(
              color: Colors.black.withOpacity(0.05),
              blurRadius: 15,
              offset: const Offset(0, 5),
            ),
         ],
       ),
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.start,
         children: [
            _buildInfoRow('Email', email, Icons.email_outlined),
            const Divider(height: 32),
            _buildInfoRow('Company', company, Icons.business_outlined),
            const Divider(height: 32),
            _buildInfoRow('Department', deptName, Icons.meeting_room_outlined),
            const Divider(height: 32),
            _buildInfoRow('Role', roleStr, Icons.admin_panel_settings_outlined),
         ],
       ),
     );
  }

  Widget _buildInfoRow(String label, String value, IconData icon) {
    return Row(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Icon(icon, color: Colors.blue.shade700, size: 24),
        const SizedBox(width: 16),
        Expanded(
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Text(
                label,
                style: TextStyle(
                  fontSize: 14,
                  color: Colors.grey.shade500,
                  fontWeight: FontWeight.w500,
                ),
              ),
              const SizedBox(height: 4),
              Text(
                value,
                style: const TextStyle(
                  fontSize: 16,
                  color: Colors.black87,
                  fontWeight: FontWeight.w600,
                ),
              ),
            ],
          ),
        ),
      ],
    );
  }
}