using System;

using Fare;

using System.IO;

public class Program

{

    public static void Main()

    {

        // Sanitize the folder include filter by stripping regex stuff off the front of it

        var filter = "(?i)^branches/branch/(a|d)/asdf$";

        var caretIndex = filter.IndexOf('^');

        var startIndex = caretIndex == -1 ? 0 : caretIndex + 1;

        var sanitizedFilter = filter[startIndex..];

        Console.WriteLine($"Sanitized filter: {sanitizedFilter}");

​

        // Create a Xeger instance with the regex pattern

        Xeger xeger = new Xeger(sanitizedFilter, new Random());

        string example = xeger.Generate();

        Console.WriteLine($"Xeger result: {example}");

        // 

        var diffIndex = FindFirstDifferenceIndex(sanitizedFilter, example);

        var path = sanitizedFilter[..diffIndex];

        var endIndex = path.LastIndexOf(Path.DirectorySeparatorChar) + 1;

        path = path[..endIndex];

        Console.WriteLine($"\nFinal base path: {path}");

    }

    public static int FindFirstDifferenceIndex(string str1, string str2)

    {

        int minLength = Math.Min(str1.Length, str2.Length);

​

        for (int i = 0; i < minLength; i++)

        {

            if (str1[i] != str2[i])

            {

                return i;

            }

        }

​

        // If one string is a prefix of the other, the difference is at the end of the shorter string

        if (str1.Length != str2.Length)

        {

            return minLength;

        }

​

        // Strings are identical

        return -1;

    }

}