using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var exchangeRates = new Dictionary<string, CurrencyConversionRate>

        {

            {"SEK", new CurrencyConversionRate {ExchangeRateToUSD= 0.105960264900662, ExchangeRateFromUSD = 9.4375}}

        };

        var result = GetTenderODCutPercentage(1.20m, "USD", 47, 10.41m, exchangeRates);

        Console.WriteLine("Discount would be: " + result);

    }

    public static float GetTenderODCutPercentage(decimal GrossPrice, string CurrencyCode, float DistributorDiscount, decimal newTenderPrice, Dictionary<string, CurrencyConversionRate> currencyConversionRateList)

    {

        // Just assigning stuff to better names

            var originalSRP = GrossPrice;

            var originalCurrency = CurrencyCode;

            var originalODCutPercentage = DistributorDiscount;

​

            // Make the originalSRP into SEK pricing

            var originalSRPConvertedToSEK = ConvertToSEKFromCurrency(originalSRP, originalCurrency, currencyConversionRateList);

​

            var ODCutMultiplier = (originalODCutPercentage / 100);

​

            var publishersCutMultiplier = 1 - ODCutMultiplier;

​

            var moneyOwedToPublisherInSEK = originalSRPConvertedToSEK * (decimal)publishersCutMultiplier;

​

            var owedToPubOverSwedishPrice = moneyOwedToPublisherInSEK / newTenderPrice;

​

            var newODCutPercentage = 100 - (100 * owedToPubOverSwedishPrice);

​

            // This checks to make sure the correct OD Distributor Discount is created for the new Sweden Tender Price

            var isCorrectNewODCutPercentage = CheckNewODCutPercentage(newODCutPercentage, newTenderPrice, moneyOwedToPublisherInSEK);

​

            if (isCorrectNewODCutPercentage == false)

                throw new Exception("The calculations for the new OD Distributor Discount for Sweden Tender Price seems incorrect, " +

                                                  "you should double check the math");

​

            return (float)newODCutPercentage;

    }

    public static bool CheckNewODCutPercentage(decimal newODCutPercentage, decimal newTenderPrice,

            decimal moneyOwedToPublisherInSEK)

        {

            var newPublisherCutMultiplier = (100 - newODCutPercentage) / 100;

​

            var checkMoneyOwedToPublishers = newTenderPrice * newPublisherCutMultiplier;

​

            var roundedMoneyOwedToPublisherInSEK = Math.Round(moneyOwedToPublisherInSEK, 4);

​

            var roundedCheckMoneyOwedToPub = Math.Round(checkMoneyOwedToPublishers, 4);

​

            LOLRound(moneyOwedToPublisherInSEK, checkMoneyOwedToPublishers);

            if (roundedMoneyOwedToPublisherInSEK == roundedCheckMoneyOwedToPub)

            {

                return true;

            }

            else

            {

                return false;

            }

​

        }

    public static decimal ConvertToSEKFromCurrency(decimal priceToConvert, string currency, Dictionary<string, CurrencyConversionRate> currencyConversionRateDictionary)

        {

            var sekCurrencyConversionEntry = currencyConversionRateDictionary["SEK"];

​

            if (currency == "SEK")

            {

                return priceToConvert;

            }

            else if (currency == "USD")

            {

                return (decimal)sekCurrencyConversionEntry.ExchangeRateFromUSD * priceToConvert;

            }

            else

            {

                // We are only given conversions to and from USD

                // So we need to convert the given currency to USD in order to figure out SEK pricing

                var currencyToUSD = currencyConversionRateDictionary[currency];

​

                var convertCurrencytoUSD = (decimal)currencyToUSD.ExchangeRateToUSD * priceToConvert;

                return convertCurrencytoUSD * (decimal)sekCurrencyConversionEntry.ExchangeRateFromUSD;

            }

        }

    public static void LOLRound(decimal moneyOwedToPublisherInSEK, decimal checkMoneyOwedToPublishers)

    {

        foreach(var roundPercision in (IEnumerable<int>)Enumerable.Range(1, 10))

        {

            var roundedMoneyOwedToPublisherInSEK = Math.Round(moneyOwedToPublisherInSEK, roundPercision);

​

            var roundedCheckMoneyOwedToPub = Math.Round(checkMoneyOwedToPublishers, roundPercision);

​

            Console.WriteLine("\n\nPerNum : " + roundPercision);

            Console.WriteLine("Owed   : " + roundedMoneyOwedToPublisherInSEK);

            Console.WriteLine("Checked: " + roundedCheckMoneyOwedToPub);

        }

    }

    public class CurrencyConversionRate

    {

        public double? ExchangeRateToUSD;

        public double? ExchangeRateFromUSD;

    }

}