using System;
using System.Threading;
using System.Threading.Tasks;
using NSubstitute;
using NUnit.Framework;
using Plugin.BLE.Abstractions.Contracts;
using TINK.Services.BluetoothLock.BLE;
using TINK.Services.BluetoothLock.Exception;
using TINK.Services.BluetoothLock.Tdo;
using DeviceState = Plugin.BLE.Abstractions.DeviceState;

namespace TestTINKLib.Fixtures.ObjectTests.Services.BluetoothLock
{
	[TestFixture]
	public class TestLockItBaseService
	{
		[Test]
		public void TestConnect_Connected_InvalidArgs()
		{
			var device = Rhino.Mocks.MockRepository.GenerateStub<IDevice>();
			var adapter = Rhino.Mocks.MockRepository.GenerateStub<IAdapter>();
			var cipher = Rhino.Mocks.MockRepository.GenerateStub<TINK.Model.Device.ICipher>();

			Rhino.Mocks.RhinoMocksExtensions.Stub(device, x => x.State).Return(DeviceState.Disconnected);

			var exception = Assert.Throws<AggregateException>(
				() => { var lockIt = LockItEventBased.Authenticate(device, null, adapter, cipher).Result; },
				"If connected no auth is requied.");

			Assert.That(exception.InnerExceptions.Count > 0);
			Assert.That(exception.InnerExceptions[0], Is.InstanceOf<BluetoothDisconnectedException>());

		}

		[Test]
		public void TestConnect_Connected()
		{
			var device = Substitute.For<IDevice>();
			var adapter = Substitute.For<IAdapter>();
			var cipher = Substitute.For<TINK.Model.Device.ICipher>();
			var auth = Substitute.For<ICharacteristic>();
			var lockControl = Substitute.For<IService>();

			var authTdo = new LockInfoAuthTdo.Builder
			{
				Id = 12,
				K_seed = new byte[] { (byte)'i', (byte)'V', (byte)'F', (byte)'m', (byte)'u', (byte)'T', (byte)'n', (byte)'K', (byte)'q', (byte)'E', (byte)'Y', (byte)'h', (byte)'m', (byte)'T', (byte)'l', (byte)'e' },
				K_u = new byte[16]
			}.Build();

			device.State.Returns(DeviceState.Connected);
			device.GetServiceAsync(Arg.Any<Guid>(), Arg.Any<CancellationToken>()).Returns(Task.FromResult(lockControl));
			lockControl.GetCharacteristicAsync(Arg.Any<Guid>()).Returns(Task.FromResult(auth));
			auth.WriteAsync(Arg.Any<byte[]>()).Returns(Task.FromResult(true)); // Write COPRI seed to lock
			auth.ReadAsync(Arg.Any<CancellationToken>()).Returns(Task.FromResult(new byte[8])); // Read lock seed
			cipher.Decrypt(Arg.Any<byte[]>(), Arg.Any<byte[]>()).Returns(new byte[3]);
			cipher.Encrypt(Arg.Any<byte[]>(), Arg.Any<byte[]>()).Returns(new byte[16]);
			auth.WriteAsync(Arg.Any<byte[]>()).Returns(Task.FromResult(true)); // Write COPRI seed to lock

			device.Name.Returns("Origin");

			Assert.AreEqual(
				"Origin",
				LockItEventBased.Authenticate(device, authTdo, adapter, cipher).Result.Name,
				"If connected no auth is requied.");
		}

		[Test]
		public void TestAuth()
		{
			var authTdo = new LockInfoAuthTdo.Builder
			{
				Id = 12,
				K_seed = new byte[] { (byte)'c', (byte)'b', (byte)'z', (byte)'b', (byte)'y', (byte)'I', (byte)'q', (byte)'j', (byte)'v', (byte)'L', (byte)'V', (byte)'I', (byte)'t', (byte)'C', (byte)'B', (byte)'I' },
				K_u = new byte[16]
			}.Build();

			var device = Rhino.Mocks.MockRepository.GenerateStub<IDevice>();
			var adapter = Rhino.Mocks.MockRepository.GenerateStub<IAdapter>();
			var cipher = Rhino.Mocks.MockRepository.GenerateStub<TINK.Model.Device.ICipher>();

			Rhino.Mocks.RhinoMocksExtensions.Stub(device, x => x.State).Return(DeviceState.Disconnected);

			// Use factory to create LockIt-object.
			var exception = Assert.Throws<AggregateException>(
				() => { var lockIt = LockItEventBased.Authenticate(device, authTdo, adapter, cipher).Result; },
				"If connected no auth is requied.");

			Assert.That(exception.InnerExceptions.Count > 0);
			Assert.That(exception.InnerExceptions[0], Is.InstanceOf<BluetoothDisconnectedException>());
		}
	}
}