/// Representa um convite pendente no sistema
class Invite {
  final String id;
  final String email;
  final String role;
  final String? phone;         // para encarregados — número do terminal
  final String invitedBy;      // profile_id do principal que convidou
  final String status;         // pending | accepted | rejected | expired
  final DateTime createdAt;
  final DateTime expiresAt;
  final String? childId;       // para encarregados — ligação à criança

  Invite({
    required this.id,
    required this.email,
    required this.role,
    this.phone,
    required this.invitedBy,
    required this.status,
    required this.createdAt,
    required this.expiresAt,
    this.childId,
  });

  factory Invite.fromMap(Map<String, dynamic> m) => Invite(
    id: m['id'] ?? '',
    email: m['email'] ?? '',
    role: m['role'] ?? 'parent',
    phone: m['phone'],
    invitedBy: m['invited_by'] ?? '',
    status: m['status'] ?? 'pending',
    createdAt: DateTime.tryParse(m['created_at'] ?? '') ?? DateTime.now(),
    expiresAt: DateTime.tryParse(m['expires_at'] ?? '') ?? DateTime.now().add(const Duration(days: 7)),
    childId: m['child_id'],
  );

  bool get isExpired => DateTime.now().isAfter(expiresAt);
  bool get isPending => status == 'pending' && !isExpired;

  Map<String, dynamic> toMap() => {
    'email': email,
    'role': role,
    'phone': phone,
    'invited_by': invitedBy,
    'status': status,
    'expires_at': expiresAt.toIso8601String(),
    'child_id': childId,
  };
}