问如何将JavaScript中函数的认知复杂度从10降低到6

EN

const getCars = (cars, config, types) => {
  const {
    carName
  } = types;
  const carObject = {};
  const carsRange = () => {}
  let carRange = carsRange(cars);
  Object.entries(cars).forEach(([key, value]) => {
    if (key === 'sedan' && value) {
      const carRangeVal = value.split(' ');
      const year = carRangeVal[1];
      const model = carRangeVal[0].substring(1, 2);
      carRange = generateCarRange(year, model);
    }
    if (key === 'suv' && value) {
      const carRangeVal = value.split(' ');
      const year = carRangeVal[1];
      const model = carRangeVal[0];
      carObject['model'] = true;
      carRange = checkYear(year, model);
    }
    if (value) {
      carObject[key] = value;
    }
  });

  if (
    config.header === 'TEST A' ||
    config.header === 'TEST B'
  ) {
    carObject['carName'] = carName[0].id;
  }

  carObject['configName'] = config.header;
  carObject['contractStartDate'] = carsRange[0];
  carObject['contractEndDate'] = carsRange[1];
  return carObject;
};

console.log(getCars({}, {}, {}));