public enum AtticVentilation {

  public static let description = """
  Calculate attic ventilation requirements and assess current conditions.
  """

  public struct Request: Codable, Equatable, Sendable, Hashable {

    public let pressureDifferential: Double
    public let outdoorTemperature: Double
    public let outdoorDewpoint: Double
    public let atticTemperature: Double
    public let atticDewpoint: Double
    public let atticFloorArea: Double
    public let existingIntakeArea: Double?
    public let existingExhaustArea: Double?

    public init(
      pressureDifferential: Double,
      outdoorTemperature: Double,
      outdoorDewpoint: Double,
      atticTemperature: Double,
      atticDewpoint: Double,
      atticFloorArea: Double,
      existingIntakeArea: Double? = nil,
      existingExhaustArea: Double? = nil
    ) {
      self.pressureDifferential = pressureDifferential
      self.outdoorTemperature = outdoorTemperature
      self.outdoorDewpoint = outdoorDewpoint
      self.atticTemperature = atticTemperature
      self.atticDewpoint = atticDewpoint
      self.atticFloorArea = atticFloorArea
      self.existingIntakeArea = existingIntakeArea
      self.existingExhaustArea = existingExhaustArea
    }
  }

  public struct Response: Codable, Equatable, Sendable {

    public let pressureDifferential: Double
    public let temperatureDifferential: Double
    public let dewpointDifferential: Double
    public let stackEffect: Double
    public let requiredVentilationArea: RequiredVentilationArea
    public let recommendations: [String]
    public let warnings: [String]
    public let ventilationStatus: VentilationStatus

    public init(
      pressureDifferential: Double,
      temperatureDifferential: Double,
      dewpointDifferential: Double,
      stackEffect: Double,
      requiredVentilationArea: AtticVentilation.RequiredVentilationArea,
      recommendations: [String],
      warnings: [String],
      ventilationStatus: AtticVentilation.VentilationStatus
    ) {
      self.pressureDifferential = pressureDifferential
      self.temperatureDifferential = temperatureDifferential
      self.dewpointDifferential = dewpointDifferential
      self.stackEffect = stackEffect
      self.requiredVentilationArea = requiredVentilationArea
      self.recommendations = recommendations
      self.warnings = warnings
      self.ventilationStatus = ventilationStatus
    }
  }

  public enum VentilationStatus: String, Codable, CaseIterable, Equatable, Sendable {
    case adequate
    case inadequate
    case critical
  }

  public struct RequiredVentilationArea: Codable, Equatable, Sendable {

    public let intake: Double
    public let exhaust: Double

    public init(intake: Double, exhaust: Double) {
      self.intake = intake
      self.exhaust = exhaust
    }
  }
}

#if DEBUG
  public extension AtticVentilation.Response {
    static let mock = Self(
      pressureDifferential: 4,
      temperatureDifferential: 15,
      dewpointDifferential: 10,
      stackEffect: 2,
      requiredVentilationArea: .init(intake: 4.9, exhaust: 3.3),
      recommendations: [
        "Install 4.9 sq. ft. of intake ventilation",
        "Install 3.3 sq. ft. of exhaust ventilation",
        "Consider adding exhaust ventilation to balance pressure"
      ],
      warnings: ["High pressure differential - may indicate blocked vents or insufficient ventilation."],
      ventilationStatus: AtticVentilation.VentilationStatus.allCases.randomElement()!
    )
  }
#endif