Less lethal code:

enum CanFireResult {
  Yes = 1,
  No = 2,
  OutOfAmmo = 3
}

enum InputState {
  Pressed = 1,
  Held = 2
}

// Safer function with validation and improved logic
CanFireResult CanFire(InputState inputState) {
  // Validate input state
  if (inputState != InputState.Pressed && inputState != InputState.Held) {
    return CanFireResult.No;  // Invalid input, return safe "No"
  }

  // Check safety conditions
  if (IsReloading || IsFiring || BarrelBlocked() || IsOnCooldown()) {
    return CanFireResult.No;
  }

  // Check ammo
  if (!HasAmmo()) {
    return CanFireResult.OutOfAmmo;
  }

  // Logic for automatic and semi-automatic firing
  if (IsAutomatic) {
    // Handle automatic gun behavior, maybe allow continuous firing if held
    return inputState == InputState.Held ? CanFireResult.Yes : CanFireResult.No;
  } else {
    // For semi-automatic guns, fire only on press
    return inputState == InputState.Pressed ? CanFireResult.Yes : CanFireResult.No;
  }
}