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

namespace Centron.Tests.EndToEnd.Tests.CryptoLogics
{
    public class CryptoLogicTests : CentronTest
    {
        public CryptoLogicTests(ITestOutputHelper testOutputHelper) 
            : base(testOutputHelper)
        {
        }

        [Theory]
        [InlineData(null)]
        [InlineData("MySuperSecretPassword")]
        public void Encrypt_Decrypt_Text(string secret)
        {
            var inputText = "Irgendein Text den ich verschlüsseln will, zB ein Connection-String!";

            var encryptedText = new AESCryptoLogic().EncryptText(inputText, secret);
            this.Verifier.Verify($"EncryptedText_{secret}", encryptedText);

            var decryptedText = new AESCryptoLogic().DecryptText(encryptedText, secret);
            Assert.Equal(inputText, decryptedText);
        }

        [Theory]
        [InlineData(null)]
        [InlineData("")]
        [InlineData("   ")]
        [InlineData("\t")]
        [InlineData("\r\n")]
        public void Encrypt_Decrypt_Text_Null(string text)
        {
            var encryptedText = new AESCryptoLogic().EncryptText(text);
            Assert.Equal(string.Empty, encryptedText);
            
            var decryptedText = new AESCryptoLogic().DecryptText(text);
            Assert.Equal(string.Empty, decryptedText);
        }
        
        [Fact]
        public void Decrypt_Text_InvalidDataReturnsEmptyString()
        {
            var decryptedText = new AESCryptoLogic().DecryptText("Haha");
            Assert.Equal(string.Empty, decryptedText);
        }

        [Theory]
        [InlineData(null)]
        [InlineData("MySuperSecretPassword")]
        public void Encrypt_Decrypt_ByteArray(string secret)
        {
            var inputByteArray = new byte[] {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20};

            var encryptedByteArray = new AESCryptoLogic().EncryptByteArray(inputByteArray, secret);
            this.Verifier.Verify($"EncryptedByteArray_{secret}", encryptedByteArray);

            var decryptedByteArray = new AESCryptoLogic().DecryptByteArray(encryptedByteArray, secret);
            Assert.Equal(inputByteArray, decryptedByteArray);
        }
        
        [Fact]
        public void Encrypt_Decrypt_ByteArray_Null()
        {
            var encryptedByteArray = new AESCryptoLogic().EncryptByteArray(null);
            Assert.Null(encryptedByteArray);
            
            var decryptedByteArray = new AESCryptoLogic().DecryptByteArray(null);
            Assert.Null(decryptedByteArray);
        }
        
        [Fact]
        public void Decrypt_ByteArray_InvalidDataReturnsNull()
        {
            var decryptedByteArray = new AESCryptoLogic().DecryptByteArray(new byte[] {1, 2, 3});
            Assert.Null(decryptedByteArray);
        }
    }
}