public enum FurnaceInterpolation {

  public struct Request: Codable, Equatable, Sendable {

    public let elevation: Int?
    public let winterDesignTemperature: Int
    public let heatLoss: Int
    public let inputRating: Int
    public let afue: Double

    public init(
      elevation: Int? = nil,
      winterDesignTemperature: Int,
      heatLoss: Int,
      inputRating: Int,
      afue: Double
    ) {
      self.elevation = elevation
      self.winterDesignTemperature = winterDesignTemperature
      self.heatLoss = heatLoss
      self.inputRating = inputRating
      self.afue = afue
    }
  }

  public struct Response: Codable, Equatable, Sendable {

    public let failed: Bool
    public let failures: [String]?
    public let altitudeAdjustmentMultiplier: Double?
    public let capacityAsPercentOfLoad: Int
    public let oversizingLimit: Int
    public let undersizingLimit: Int
    public let outputCapacity: Int

    public init(
      failures: [String]? = nil,
      altitudeAdjustmentMultiplier: Double? = nil,
      capacityAsPercentOfLoad: Int,
      oversizingLimit: Int,
      undersizingLimit: Int,
      outputCapacity: Int
    ) {
      self.failed = failures == nil ? false : !failures!.isEmpty
      self.failures = failures
      self.altitudeAdjustmentMultiplier = altitudeAdjustmentMultiplier
      self.capacityAsPercentOfLoad = capacityAsPercentOfLoad
      self.oversizingLimit = oversizingLimit
      self.undersizingLimit = undersizingLimit
      self.outputCapacity = outputCapacity
    }
  }
}