using System;

using EasyEncryption; // https://www.nuget.org/packages/EasyEncryption/  Install using this guide: https://docs.microsoft.com/en-us/nuget/quickstart/install-and-use-a-package-in-visual-studio

public class Program {

    private static string HashUserInput(string input) { // Create a function to easily hash userinputs

        return SHA.ComputeSHA256Hash(input); // One function to hash using SHA256 with EasyEncryption library, returns a string.

    }

    private static bool InputMatch(string userInput, string savedTextFileString) { // Function to check if the user input the correct string

        string hashedInput = HashUserInput(userInput); // Hash user input to check it against the one stored in a file

        bool doInputStringMatch = string.Equals(hashedInput, savedTextFileString); // Check both strings

        return doInputStringMatch; // Return the result of comparing both hashed strings

    }

    public static void Main() {

        string toHashString = "silpa"+"shinto"+ "01/01/1999"+"va"+"3023 farmstead mill drive"; // user inputs

        string hashedSavedUserInput = HashUserInput(toHashString); // What you store in the actual text file

        Console.WriteLine("The hashed version of the users input is:       {0} (this is what gets saved to the text file)", hashedSavedUserInput); // Log the hashed version

        string userInputString = "silpa"+"shinto"+ "01/01/1999"+"va"+"3023 farmstead mill drive"; // Password the user enters to login

        Console.WriteLine("The hashed version of the good entered userinput is {0} (it should match the one in the text file)", HashUserInput(userInputString)); // Log the hashed version

        string userInputStringFails = "not the correct user Input"; // A test if the user enters an incorrect password

        Console.WriteLine("The hashed version of the bad entered userinput is  {0} (this will not match the one in the text file)", HashUserInput(userInputStringFails)); // Log the hashed version

        if (InputMatch(userInputString, hashedSavedUserInput)) // Check that the good userinput is correct

            Console.WriteLine("The good userinput is correct"); // This should happen

        else

            Console.WriteLine("The good userinput is not correct"); // This should not happen

        if (InputMatch(userInputStringFails, hashedSavedUserInput)) // Check that the bad userinput is incorrect

            Console.WriteLine("The bad userinput is correct");  // This should not happen

        else 

            Console.WriteLine("The bad userinput is not correct"); // This should happen

    }

}

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