using ReserveManagementSystemLib.Models;

namespace ReserveManagementSystemApi.Helpers
{
    public class BoatLoanCalculationHelper 
    {
        private LoanReserve loanReserve = new LoanReserve();

        public BoatLoanCalculationHelper()
        {

        }
       
        public LoanReserve CalculateStandardMarkup(CalculationConfig cc)
        {
            var markup = cc.LoanData().ContractRate - cc.LoanData().BuyRate;
            loanReserve.ReserveTypeMessage = "Standard Reserve";
            switch (markup)
            {
                case decimal d when (d >= (decimal)0.00 && d <= (decimal)0.49):
                    loanReserve.ReserveAmount = cc.LoanData().LoanAmount * (decimal).01;
                    break;
                case decimal d when (d >= (decimal)0.50 && d <= (decimal)0.74):
                    loanReserve.ReserveAmount = cc.LoanData().LoanAmount * (decimal).02;
                    break;
                case decimal d when (d >= (decimal)0.75 && d <= (decimal)0.99):
                    loanReserve.ReserveAmount = cc.LoanData().LoanAmount * (decimal).03;
                    break;
                case decimal d when (d >= (decimal)1.00 && d <= (decimal)1.49):
                    loanReserve.ReserveAmount = cc.LoanData().LoanAmount * (decimal).04;
                    break;
                case decimal d when (d >= (decimal)1.50 && d <= (decimal)1.99):
                    loanReserve.ReserveAmount = cc.LoanData().LoanAmount * (decimal).05;
                    break;
                case decimal d when (d == (decimal)2.00):
                    loanReserve.ReserveAmount = cc.LoanData().LoanAmount * (decimal).06;
                    break;
                case decimal d when (d > (decimal)2.00):
                    loanReserve.ReserveAmount = cc.LoanData().LoanAmount * (decimal).06;
                    loanReserve.ReserveTypeMessage = "Standard Reserve - Exceeds Max Markup";
                    break;
                default:
                    loanReserve.ReserveAmount = 0;
                    loanReserve.ReserveTypeMessage = "No Reserve";
                    break;
            }
            return loanReserve;

        }

        internal DateTime GetLastChargebackDate (DateTime firstPmtDate, int numOfChargebackPayments)
        {
            return firstPmtDate.AddMonths(numOfChargebackPayments - 1);
        }
    }
}