using System;
using System.Threading.Tasks;
using Centron.Common.TextCoding;
using Centron.Tests.EndToEnd.Infrastructure;
using Xunit;
using Xunit.Abstractions;

namespace Centron.Tests.EndToEnd.Tests.CryptoControls;

public class CryptoControlTests : CentronTest
{
    public CryptoControlTests(ITestOutputHelper testOutputHelper) 
        : base(testOutputHelper)
    {
    }
    
    [Theory]
    [InlineData(0, "Irgendein Text den ich verschlüsseln will, zB ein Connection-String!")]
    [InlineData(1, "")]
    [InlineData(2, "     ")]
    [InlineData(3, "\t")]
    [InlineData(4, "\r\n")]
    [InlineData(5, null)]
    [InlineData(6, "245050016053193207141108203017074108161195181234")]
    public void Encrypt_Decrypt_Text(int counter, string input)
    {
        var encryptedText = CryptoControl.EncryptToString(input);
        this.Verifier.Verify($"EncryptedText_{counter}", encryptedText);

        var decryptedText = CryptoControl.DecryptString(encryptedText);
        var expectedText = input is null 
            ? "" // The Encrypt-Decrypt-Dance will return "" for NULL input instead
            : input;
        Assert.Equal(expectedText, decryptedText);
    }
    
    [Fact]
    public void Decrypt_Text_InvalidDataReturnsEmptyString()
    {
        var ex = Assert.Throws<FormatException>(() => CryptoControl.DecryptString("Haha"));
        Assert.Equal("The input string 'Hah' was not in a correct format.", ex.Message);
    }

    [Fact]
    public void Multi_Threading_Test()
    {
        Parallel.For(0, 10000, i =>
        {
            var input = "Hallo";

            var encrypted = CryptoControl.EncryptToString(input);
            var decrypted = CryptoControl.DecryptString(encrypted);
            
            Assert.Equal(input, decrypted);
        });
    }
}