namespace ElevatorDiag;

public record ElevatorHealth(
    bool IsHealthy,
    ElevatorState State,
    int CurrentFloor,
    double PrecisePosition,
    string? ActiveFault,
    int PendingRequestsCount
);

public class ElevatorDiagnostics
{
    private readonly Elevator _elevator;

    public ElevatorDiagnostics(Elevator elevator)
    {
        _elevator = elevator;
    }

    public ElevatorHealth GetHealth()
    {
        return new ElevatorHealth(
            _elevator.State != ElevatorState.Faulted,
            _elevator.State,
            _elevator.CurrentFloor,
            _elevator.CurrentPosition,
            _elevator.LastFault,
            _elevator.TargetFloors.Count
        );
    }

    public string GetStatusReport()
    {
        var health = GetHealth();
        return $"[Elevator Report]\n" +
               $"Status: {(health.IsHealthy ? "OK" : "FAULTED")}\n" +
               $"State: {health.State}\n" +
               $"Floor: {health.CurrentFloor} ({health.PrecisePosition:F2})\n" +
               $"Pending: {health.PendingRequestsCount} floors\n" +
               (health.ActiveFault != null ? $"Fault Detail: {health.ActiveFault}\n" : "");
    }
}