using System;

using System.Linq;

​

/*

    * TASK:

    * Parse the sample CSV input into the expected types.

*/

​

public class CSVProgram

{

    public enum Currency

    {

        USD,

        EUR,

        GBP

    };

​

    public record Cashflow(Currency Currency, decimal Amount, DateOnly ValueDate)

    {

        public static Cashflow[] Parse(string x)

        {

            throw new Exception("TO DO");

        }

    };

​

    private const string sample = @"Currency,Cashflow,Date

USD,124.35,2023-09-25

EUR,179.53,2023-10-23

GBP,-1321.23,2023-10-23";

​

    public static void Main()

    {

        Cashflow[] expected =

        {

            new Cashflow(Currency.USD, 124.35m, new DateOnly(2023, 9, 25)),

            new Cashflow(Currency.EUR, 179.53m, new DateOnly(2023, 10, 23)),

            new Cashflow(Currency.GBP, -1321.23m, new DateOnly(2023, 10, 23))

        };

​

        var actual = Cashflow.Parse(sample);

​

        if (actual.Length != expected.Length)

        {

            throw new Exception("Length differ!");

        }

​

        var entryIndex = 0;

        foreach (var (expectedEntry, actualEntry) in expected.Zip(actual))

        {

            if (actualEntry != expectedEntry)

            {

                throw new Exception($"Parsed entry #{entryIndex} differs from the expected one");

            }

​

            entryIndex++;

        }

​

        Console.WriteLine("All ok!");

    }

}