using NUnit.Framework;
using ServiceShared.Crypto;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;

namespace ServiceOutsideTests.Crypto
{
    public class Curve25519
    {
        [Test]
        public void SharedKeys()
        {
            KeyPair aliceKey = ServiceShared.Crypto.Curve25519.GenerateKeyPair();
            KeyPair bobKey = ServiceShared.Crypto.Curve25519.GenerateKeyPair();
            byte[] aliceSharedKey = aliceKey.GetSharedKey(bobKey.PublicKey);
            byte[] bobSharedKey = bobKey.GetSharedKey(aliceKey.PublicKey);

            Assert.AreEqual(aliceSharedKey, bobSharedKey);
        }


        [Test]
        public void AliceSendToBob()
        {
            KeyPair aliceKey = ServiceShared.Crypto.Curve25519.GenerateKeyPair();
            KeyPair bobKey = ServiceShared.Crypto.Curve25519.GenerateKeyPair();

            byte[] aliceSharedKey = aliceKey.GetSharedKey(bobKey.PublicKey);
            byte[] bobSharedKey = bobKey.GetSharedKey(aliceKey.PublicKey);

            string key = "a dasdas djakl jdklas jdlkjakldhsajkdhsakdhkajhdkjgahkdgsagdas gdj sadag jdsaj gdg jasdagj dgsa gdsa dsga dgsja gdjagdgasj gjhdga gdja";
            string input = "Hello World";
            string encrypted = ServiceShared.Crypto.AES.Encrypt(input, aliceSharedKey);
            string decrypted = ServiceShared.Crypto.AES.Decrypt(encrypted, bobSharedKey);
            Assert.AreEqual(input, decrypted);
        }

        [Test]
        public void BobSendToAlice()
        {
            KeyPair aliceKey = ServiceShared.Crypto.Curve25519.GenerateKeyPair();
            KeyPair bobKey = ServiceShared.Crypto.Curve25519.GenerateKeyPair();

            byte[] aliceSharedKey = aliceKey.GetSharedKey(bobKey.PublicKey);
            byte[] bobSharedKey = bobKey.GetSharedKey(aliceKey.PublicKey);

            string key = "a dasdas djakl jdklas jdlkjakldhsajkdhsakdhkajhdkjgahkdgsagdas gdj sadag jdsaj gdg jasdagj dgsa gdsa dsga dgsja gdjagdgasj gjhdga gdja";
            string input = "Hello World";
            string encrypted = ServiceShared.Crypto.AES.Encrypt(input, bobSharedKey);
            string decrypted = ServiceShared.Crypto.AES.Decrypt(encrypted, aliceSharedKey);
            Assert.AreEqual(input, decrypted);
        }

        [Test]
        public void BobVerifyAlicasSignature()
        {
            KeyPair aliceKey = ServiceShared.Crypto.Curve25519.GenerateKeyPair();
            KeyPair bobKey = ServiceShared.Crypto.Curve25519.GenerateKeyPair();
            string aliceSignature = aliceKey.GetSignature("BefundApp");
            Assert.IsTrue(bobKey.VerifySignature("BefundApp", aliceSignature, aliceKey.SigningPublicKey));
        }
    }
}