// models
import Rate from '../models/rate.model';
import Installment from '../models/installment.model';

/**
 * Method for creating installment
 *
 * @param  {float}    totalPayback  Total amount to be paid back
 * @param  {integer}  rateId        the rate Id for the loan requested
 * @param  {string}   loanId        the loan Id
 * @return {Promise}                installment created
 */
const createInstalment = async (totalPayback, rateId, loanId) => {
  const { duration } = await Rate.findById(rateId);

  const instalmentDate = (duration / 4);
  const chargeDate = new Date();

  const instalmentAmount = parseFloat(totalPayback / 4);

  const instalmentData = [
    {
      amount: instalmentAmount,
      dueDate: chargeDate.setDate(chargeDate.getDate() + instalmentDate),
      loanId
    },
    {
      amount: instalmentAmount,
      dueDate: chargeDate.setDate(chargeDate.getDate() + instalmentDate),
      loanId
    },
    {
      amount: instalmentAmount,
      dueDate: chargeDate.setDate(chargeDate.getDate() + instalmentDate),
      loanId
    },
    {
      amount: instalmentAmount,
      dueDate: chargeDate.setDate(chargeDate.getDate() + instalmentDate),
      loanId
    }
  ];
};

export default createInstalment;