import 'package:cloud_firestore/cloud_firestore.dart';

enum UserRole {
  employee,
  admin,
  systemAdmin,
}

class UserModel {
  final String uid;
  final String email;
  final String displayName;
  final UserRole role;
  final String tariffProfileId;
  final String organizationId;
  final String? departmentId;
  final DateTime createdAt;
  final DateTime updatedAt;
  final bool isActive;
  final UserPreferences preferences;

  UserModel({
    required this.uid,
    required this.email,
    required this.displayName,
    required this.role,
    required this.tariffProfileId,
    required this.organizationId,
    this.departmentId,
    required this.createdAt,
    required this.updatedAt,
    this.isActive = true,
    required this.preferences,
  });

  factory UserModel.fromFirestore(DocumentSnapshot doc) {
    final data = doc.data() as Map<String, dynamic>;
    return UserModel(
      uid: doc.id,
      email: data['email'] ?? '',
      displayName: data['displayName'] ?? '',
      role: _parseRole(data['role']),
      tariffProfileId: data['tariffProfileId'] ?? '',
      organizationId: data['organizationId'] ?? '',
      departmentId: data['departmentId'],
      createdAt: (data['createdAt'] as Timestamp).toDate(),
      updatedAt: (data['updatedAt'] as Timestamp).toDate(),
      isActive: data['isActive'] ?? true,
      preferences: UserPreferences.fromMap(data['preferences'] ?? {}),
    );
  }

  Map<String, dynamic> toFirestore() {
    return {
      'email': email,
      'displayName': displayName,
      'role': role.name,
      'tariffProfileId': tariffProfileId,
      'organizationId': organizationId,
      'departmentId': departmentId,
      'createdAt': Timestamp.fromDate(createdAt),
      'updatedAt': Timestamp.fromDate(updatedAt),
      'isActive': isActive,
      'preferences': preferences.toMap(),
    };
  }

  static UserRole _parseRole(String? roleString) {
    switch (roleString) {
      case 'admin':
        return UserRole.admin;
      case 'systemAdmin':
        return UserRole.systemAdmin;
      default:
        return UserRole.employee;
    }
  }

  UserModel copyWith({
    String? email,
    String? displayName,
    UserRole? role,
    String? tariffProfileId,
    String? organizationId,
    String? departmentId,
    DateTime? updatedAt,
    bool? isActive,
    UserPreferences? preferences,
  }) {
    return UserModel(
      uid: uid,
      email: email ?? this.email,
      displayName: displayName ?? this.displayName,
      role: role ?? this.role,
      tariffProfileId: tariffProfileId ?? this.tariffProfileId,
      organizationId: organizationId ?? this.organizationId,
      departmentId: departmentId ?? this.departmentId,
      createdAt: createdAt,
      updatedAt: updatedAt ?? this.updatedAt,
      isActive: isActive ?? this.isActive,
      preferences: preferences ?? this.preferences,
    );
  }
}

class UserPreferences {
  final bool notificationsEnabled;
  final bool emailNotifications;
  final bool pushNotifications;

  UserPreferences({
    this.notificationsEnabled = true,
    this.emailNotifications = true,
    this.pushNotifications = true,
  });

  factory UserPreferences.fromMap(Map<String, dynamic> map) {
    return UserPreferences(
      notificationsEnabled: map['notificationsEnabled'] ?? true,
      emailNotifications: map['emailNotifications'] ?? true,
      pushNotifications: map['pushNotifications'] ?? true,
    );
  }

  Map<String, dynamic> toMap() {
    return {
      'notificationsEnabled': notificationsEnabled,
      'emailNotifications': emailNotifications,
      'pushNotifications': pushNotifications,
    };
  }

  UserPreferences copyWith({
    bool? notificationsEnabled,
    bool? emailNotifications,
    bool? pushNotifications,
  }) {
    return UserPreferences(
      notificationsEnabled: notificationsEnabled ?? this.notificationsEnabled,
      emailNotifications: emailNotifications ?? this.emailNotifications,
      pushNotifications: pushNotifications ?? this.pushNotifications,
    );
  }
}