using System;

using System.Net;

using System.Net.Http;

using System.Threading.Tasks;

using Microsoft.Azure.WebJobs;

using Microsoft.Azure.WebJobs.Host;

public static async Task<HttpResponseMessage> Run(HttpRequestMessage req, TraceWriter log)

{

    log.Info("Calculating EMI");

            dynamic data = await req.Content.ReadAsAsync<object>();

            string years = data?.years;

            log.Info($"Getting Loan year as {years}");

            string loan = data?.loan;

            log.Info($"Getting Loan amount as {loan}");

            string Rate = data?.rate;

            log.Info($"Getting Loan rate as {Rate}");

            double InterestRate = Convert.ToDouble(Rate);

            double PaymentPeriods = Convert.ToInt16(Convert.ToDouble(years) * 12);

            double LoanAmount = Convert.ToDouble(loan);

            if (InterestRate > 1)

            {

                InterestRate = InterestRate / 100;

            }

            double Payment = (LoanAmount * Math.Pow((InterestRate / 12) + 1,

                         (PaymentPeriods)) * InterestRate / 12) / (Math.Pow

                         (InterestRate / 12 + 1, (PaymentPeriods)) - 1);

            //double EMI = (emiloan * emiinterestRate)/(100  * 12);

            return Payment == 0

               ? req.CreateResponse(HttpStatusCode.BadRequest, "Please pass a name on the query string or in the request body")

               : req.CreateResponse(HttpStatusCode.OK,Payment.ToString("N2")  );

}