Core_Be/Infra/Tenancy/ITenantContext.cs

namespace Fitness_core_BE.Infra.Tenancy
{
    // Request-scoped tenant info, populated once per request by TenantResolutionAttribute
    // (Helpers/TenantResolutionAttribute.cs) so downstream repos/services can read the
    // caller's resolved TenantId instead of re-deriving ClientId ad hoc via UserRoleHelper.
    public interface ITenantContext
    {
        // Client owner / Staff: their one gym. Customer: the gym validated from X-Tenant-Id
        // for this request, if any was sent. Admin: always null (see IsPlatformAdmin).
        Guid? TenantId { get; }
        bool IsPlatformAdmin { get; }
        bool IsResolved { get; }

        void SetTenant(Guid? tenantId, bool isPlatformAdmin);
    }

    public class TenantContext : ITenantContext
    {
        public Guid? TenantId { get; private set; }
        public bool IsPlatformAdmin { get; private set; }
        public bool IsResolved { get; private set; }

        public void SetTenant(Guid? tenantId, bool isPlatformAdmin)
        {
            TenantId = tenantId;
            IsPlatformAdmin = isPlatformAdmin;
            IsResolved = true;
        }
    }
}