calculatewattage.swift

func wattage(for ftp: Int, interval: TimeInterval) -> Int {
  switch self {
  case .warmup(duration: let duration, powerLow: let powerLow, powerHigh: let powerHigh):
    return Int((((interval / duration) * (powerHigh - powerLow)) + powerLow) * Double(ftp))
  case .steady(duration: _, power: let power):
    return Int(power * Double(ftp))
  case .intervals(reps: _, onDuration: _, offDuration: _, onPower: _, offPower: _):
    return 0
  case .cooldown(duration: let duration, powerLow: let powerLow, powerHigh: let powerHigh):
    return Int(((((duration - interval) / duration) * (powerHigh - powerLow)) + powerLow) * Double(ftp))
    }
}