using System;

​

public static class UserDocumentUtility

{

    private const int UserDocumentPayoutDurationInYears = 3;

    private const decimal ExpectedUserDocumentIncreasePerYear = 100m / UserDocumentPayoutDurationInYears;

    private static readonly Random Random = new Random();

    private static decimal GetRandomFactor(bool slow)

    {

        return (decimal)Random.NextDouble() * (slow ? 3m : 0.2m);

    }

​

    private static decimal CalculateUserDocumentPercentage(decimal previousPercentage, DateTime createDate, DateTime? simulatedNow = null)

    {

        var now = simulatedNow ?? DateTime.Now;

        var diff = new DateTime(now.Year, now.Month, now.Day) - createDate;

        var diffInYears = Math.Abs(diff.Days) / 365m;

        var expectedPercentage = ExpectedUserDocumentIncreasePerYear * diffInYears;

        var margin = previousPercentage - expectedPercentage;

        var factor = GetRandomFactor(margin > 0);

        var nextPercentage = previousPercentage - margin * factor;

        return Math.Min(nextPercentage, 100m);

    }

​

    public static void Main(string[] args)

    {

        DateTime createDate = new DateTime(2024, 1, 1); // Example creation date

        DateTime endDate = createDate.AddYears(3); // End date after 3 years

        Console.WriteLine($"Start Date: {createDate}");

        Console.WriteLine($"End Date: {endDate}");

        // Initial previous percentage value

        decimal previousPercentage = 0;

        // Visualize the percentage over time with an ASCII bar graph

        Console.WriteLine("Percentage over time:");

        for (DateTime date = createDate; date <= endDate; date = date.AddDays(7)) // Monthly intervals

        {

            decimal percentage = CalculateUserDocumentPercentage(previousPercentage, createDate, date);

            string bar = new string ('%', (int)Math.Round(percentage)); // Create a bar graph using ASCII characters

            Console.WriteLine($"{date:MMM yyyy} | {bar} {percentage}%");

            previousPercentage = percentage; // Update previous percentage

        }

    }

}