export interface PowerInput {
  quantity: number;
  installedPowerPerUnitKw: number;
  demandFactor: number;
}

export interface CurrentInput {
  demandPowerKw: number;
  voltageV: number;
  phaseCount: 1 | 3;
  powerFactor: number;
}

export function calculateInstalledPowerKw(input: PowerInput): number {
  return input.quantity * input.installedPowerPerUnitKw;
}

export function calculateDemandPowerKw(input: PowerInput): number {
  return calculateInstalledPowerKw(input) * input.demandFactor;
}

export function calculateCurrentA(input: CurrentInput): number {
  const powerW = input.demandPowerKw * 1000;
  if (input.phaseCount === 1) {
    return powerW / (input.voltageV * input.powerFactor);
  }
  return powerW / (Math.sqrt(3) * input.voltageV * input.powerFactor);
}