Skatteverket Representation

representation.js

const getSumOfTaxPerPerson = ({ rate, peopleCount, primary, secondary}) => ((primary / (primary + secondary)) * 300 * peopleCount * rate)


const getDeductableNotFika = ({
  peopleCount,
  tax12,
  tax25,
}) => {
  const tax12_exVat = tax12 / 1.12;
  const tax25_exVat = tax25 / 1.25;
  
  const isSumMoreThan300PerPerson =  ((tax12_exVat + tax25_exVat) / peopleCount) > 300;
  const isTax46OrMorePerPerson = (((tax12_exVat * 0.12) + (tax25_exVat * 0.25)) / peopleCount) >= 46
  const isNotZeroTax = tax12_exVat > 0 && tax25_exVat > 0
  
  const taxSumPerPerson = 
    getSumOfTaxPerPerson({ rate: 1.12, peopleCount, primary: tax12_exVat, secondary: tax25_exVat }) +
    getSumOfTaxPerPerson({ rate: 1.25, peopleCount, secondary: tax12_exVat, primary: tax25_exVat })
  
  const taxSum = (tax12_exVat * 0.12) + (tax25_exVat * 0.25);
  
  const totalPersonCost = isSumMoreThan300PerPerson
   ? taxSumPerPerson
   : taxSum
  
  const something = totalPersonCost <= (46 * peopleCount);

  if (isSumMoreThan300PerPerson && isTax46OrMorePerPerson && isNotZeroTax && something) {
    return 46 * peopleCount;
  }

  if (isSumMoreThan300PerPerson) {
    return taxSumPerPerson;
  }

  return taxSum;
}

const getRepresentation = ({
  tax12 = 0,
  tax25 = 0,
  peopleCount = 1,
  tip = 0
}) => {
  const deductable = getDeductableNotFika({ peopleCount, tax12, tax25 })
  const total = tax12 + tax25 + tip;

  return {
    deductable,
    nonDeductable: total - deductable,
    total
  }
}