import 'package:equatable/equatable.dart';

/// What a staff member is allowed to do.
enum StaffRole {
  admin('Admin', 'Full access to every module'),
  manager('Manager', 'Sales, inventory and reports'),
  cashier('Cashier', 'Billing and customers only');

  const StaffRole(this.label, this.description);

  final String label;
  final String description;

  bool get canVoidSale => this != StaffRole.cashier;
  bool get canEditPricing => this == StaffRole.admin;
  bool get canViewReports => this != StaffRole.cashier;
}

/// A person who signs in at the terminal.
///
/// Deliberately carries no PIN. It used to, which meant the credential was in
/// memory, in every widget that held a user, and — because the accounts were
/// declared as constants — inside the shipped binary. Verification now happens
/// in `StaffDao` against a stored hash, and nothing above the data layer ever
/// sees the secret.
class StaffUser extends Equatable {
  const StaffUser({
    required this.id,
    required this.name,
    required this.role,
    this.mustChangePin = false,
    this.isActive = true,
  });

  final String id;
  final String name;
  final StaffRole role;

  /// Set on a seeded or admin-reset account until the person picks their own.
  final bool mustChangePin;

  /// Deactivated rather than deleted, so bills already rung keep pointing at a
  /// real person.
  final bool isActive;

  StaffUser copyWith({
    String? name,
    StaffRole? role,
    bool? mustChangePin,
    bool? isActive,
  }) =>
      StaffUser(
        id: id,
        name: name ?? this.name,
        role: role ?? this.role,
        mustChangePin: mustChangePin ?? this.mustChangePin,
        isActive: isActive ?? this.isActive,
      );

  @override
  List<Object?> get props => [id, name, role, mustChangePin, isActive];
}

/// The registered outlet this terminal belongs to.
class StoreAccount extends Equatable {
  const StoreAccount({
    required this.id,
    required this.name,
    required this.email,
    required this.address,
    required this.gstin,
    required this.phone,
    required this.staff,
    this.plan = 'Business',
  });

  final String id;
  final String name;
  final String email;
  final String address;
  final String gstin;
  final String phone;
  final List<StaffUser> staff;
  final String plan;

  StoreAccount copyWith({
    String? name,
    String? email,
    String? address,
    String? gstin,
    String? phone,
    List<StaffUser>? staff,
    String? plan,
  }) =>
      StoreAccount(
        id: id,
        name: name ?? this.name,
        email: email ?? this.email,
        address: address ?? this.address,
        gstin: gstin ?? this.gstin,
        phone: phone ?? this.phone,
        staff: staff ?? this.staff,
        plan: plan ?? this.plan,
      );

  @override
  List<Object?> get props => [id, name, email, address, gstin, phone, plan];
}