import Foundation

public enum PlenumDimension: Equatable {
  case rectangular(width: Double, height: Double)
  case round(Double)
  
  public var areaInSquareFeet: Double {
    switch self {
      
    case .rectangular(width: let width, height: let height):
      return (width * height) / 144
      
    case let .round(dimension):
      return pow((dimension / 12) / 2, 2) * Double.pi
    }
  }
  
  public enum Key: String, Equatable, CaseIterable, CustomStringConvertible {
    
    case rectangular, round
    
    public var description: String { rawValue.capitalized }
  }

  public var key: Key {
    switch self {
    case .rectangular:
      return .rectangular
    case .round:
      return .round
    }
  }
}