using System;
using System.Threading.Tasks;
using NSubstitute;
using NUnit.Framework;
using TINK.Model.Bikes.BikeInfoNS.BluetoothLock;
using TINK.Model.Connector;
using TINK.Model.Device;
using TINK.Model.State;
using TINK.Model.User;
using TINK.Repository.Exception;
using TINK.Services.BluetoothLock;
using TINK.Services.BluetoothLock.Exception;
using TINK.Services.BluetoothLock.Tdo;
using TINK.Services.Geolocation;
using TINK.View;
using TINK.ViewModel;
using TINK.ViewModel.Bikes;
using TINK.ViewModel.Bikes.Bike.BluetoothLock.RequestHandler;

namespace TestTINKLib.Fixtures.ObjectTests.ViewModel.Bikes.Bike.BluetoothLock.RequestHandler
{
	[TestFixture]
	public class TestDisposableOpen
	{

		/// <summary>
		/// Test construction of object.
		/// </summary>
		[Test]
		public void Testctor()
		{
			var handler = new DisposableOpen(
				Substitute.For<IBikeInfoMutable>(),
				() => true, // isConnectedDelegate
				(isConnexted) => Substitute.For<IConnector>(),
				Substitute.For<IGeolocationService>(),
				Substitute.For<ILocksService>(),
				() => Substitute.For<IPollingUpdateTaskManager>(),
				Substitute.For<ISmartDevice>(),
				Substitute.For<IViewService>(),
				Substitute.For<IBikesViewModel>(),
				Substitute.For<IUser>());

			// Verify prerequisites.
			Assert.AreEqual("Rent bike", handler.ButtonText);
			Assert.IsTrue(handler.IsButtonVisible);
			Assert.AreEqual("Close lock", handler.LockitButtonText);
			Assert.IsTrue(handler.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Lock bike.
		/// Final state: Booked Open.
		/// </summary>
		[Test]
		public void TestDoBook()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocationService>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new DisposableOpen(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			bike.Id.Returns("0");

			bike.State.Value.Returns(InUseStateEnum.Booked);
			bike.LockInfo.State.Returns(LockingState.Open);

			var subsequent = handler.HandleRequestOption1().Result;

			// Verify behavior
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopAsync(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Reserving bike...";
				connector.Command.DoReserve(bike);
				bikesViewModel.ActionText = "Renting bike...";
				connector.Command.DoBookAsync(bike);
				bikesViewModel.ActionText = "Reading charging level...";
				locks[0].GetBatteryPercentageAsync();
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartAsync(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state after action
			Assert.AreEqual("Close lock", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual(string.Empty, subsequent.LockitButtonText);
			Assert.That(subsequent.IsLockitButtonVisible, Is.False);
		}

		/// <summary>
		/// Use case: Lock bike.
		/// Final state: Disposable Closed.
		/// </summary>
		[Test]
		public void TestDoBookDoReserveFailsWebConnectFailureException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocationService>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new DisposableOpen(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			bike.Id.Returns("0");

			connector.Command.DoReserve(bike).Returns(x => throw new WebConnectFailureException("Context info.", new Exception("chub")));

			bike.State.Value.Returns(InUseStateEnum.Disposable);

			var subsequent = handler.HandleRequestOption1().Result;

			// Verify behavior
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopAsync(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Reserving bike...";
				connector.Command.DoReserve(bike);
				bikesViewModel.ActionText = string.Empty;
				viewService.DisplayAlert(
					"Connection to booking system not possible.",
					"A stable Internet connection is required. Connect to WIFI or to mobile network and activate mobile data. Try again.",
					"OK");
				bikesViewModel.ActionText = "Disconnecting lock...";
				locks.DisconnectAsync(Arg.Any<int>(), Arg.Any<Guid>());
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartAsync(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state after action
			Assert.AreEqual("Rent bike", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Close lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Lock bike.
		/// Final state: Disposable Closed.
		/// </summary>
		[Test]
		public void TestDoBookDoReserveFailsException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocationService>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new DisposableOpen(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			bike.Id.Returns("0");

			connector.Command.DoReserve(bike).Returns(x => throw new Exception("Exception message."));

			bike.State.Value.Returns(InUseStateEnum.Disposable);

			var subsequent = handler.HandleRequestOption1().Result;

			// Verify behavior
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopAsync(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Reserving bike...";
				connector.Command.DoReserve(bike);
				bikesViewModel.ActionText = string.Empty;
				viewService.DisplayAdvancedAlert("Bike could not be reserved!", "Exception message.","Please try again.", "OK");
				bikesViewModel.ActionText = "Disconnecting lock...";
				locks.DisconnectAsync(Arg.Any<int>(), Arg.Any<Guid>());
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartAsync(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state after action
			Assert.AreEqual("Rent bike", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Close lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Lock bike.
		/// Final state: Disposable Closed.
		/// </summary>
		[Test]
		public void TestCloseLock()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocationService>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new DisposableOpen(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			bike.Id.Returns("0");

			locks[0].CloseAsync().Returns(Task.FromResult((LockitLockingState?)LockitLockingState.Closed));

			bike.State.Value.Returns(InUseStateEnum.Disposable); // Requesthandler factory queries state to create appropriate request handler object.
			bike.LockInfo.State.Returns(LockingState.UnknownDisconnected);

			var subsequent = handler.HandleRequestOption2().Result;

			// Verify behavior
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopAsync(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "The lock bolt moves through the spokes of the rear wheel.";
				locks[0].CloseAsync();
				bikesViewModel.ActionText = "Reading charging level...";
				locks[0].GetBatteryPercentageAsync();
				bikesViewModel.ActionText = "Updating lock state...";
				connector.Command.UpdateLockingStateAsync(bike, null);
				bikesViewModel.ActionText = "Disconnecting lock...";
				locks.DisconnectAsync(Arg.Any<int>(), Arg.Any<Guid>());
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartAsync(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state after action
			Assert.AreEqual("Reserve bike", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("DisposableDisconnected", subsequent.LockitButtonText);
			Assert.IsFalse(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Lock bike.
		/// Final state: Same as initial state.
		/// </summary>
		[Test]
		public void TestCloseLockCloseFailsOutOfReachExcption()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocationService>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new DisposableOpen(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			bike.Id.Returns("0");

			locks[0].CloseAsync().Returns<Task<LockitLockingState?>>(x => throw new OutOfReachException());

			bike.State.Value.Returns(InUseStateEnum.Disposable); // Requesthandler factory queries state to create appropriate request handler object.
			bike.LockInfo.State.Returns(LockingState.UnknownDisconnected);

			var subsequent = handler.HandleRequestOption2().Result;

			// Verify behavior
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopAsync(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "The lock bolt moves through the spokes of the rear wheel.";
				locks[0].CloseAsync();
				bikesViewModel.ActionText = string.Empty;
				viewService.DisplayAlert("Lock could not be closed!", "Make sure you have granted Bluetooth permission to the app. Step as close as possible to the bike lock and try again.", "OK");
				bikesViewModel.ActionText = "Reading charging level...";
				locks[0].GetBatteryPercentageAsync();
				bikesViewModel.ActionText = "Updating lock state...";
				connector.Command.UpdateLockingStateAsync(bike, null);
				bikesViewModel.ActionText = "Disconnecting lock...";
				locks.DisconnectAsync(Arg.Any<int>(), Arg.Any<Guid>());
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartAsync(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state after action
			Assert.AreEqual("Reserve bike", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual(nameof(DisposableDisconnected), subsequent.LockitButtonText);
			Assert.IsFalse(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Lock bike.
		/// Final state: Same as initial state.
		/// </summary>
		[Test]
		public void TestCloseLockCloseFailsExcption()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocationService>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new DisposableOpen(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			bike.Id.Returns("0");

			locks[0].CloseAsync().Returns<Task<LockitLockingState?>>(x => throw new Exception("Exception message."));

			bike.State.Value.Returns(InUseStateEnum.Disposable); // Requesthandler factory queries state to create appropriate request handler object.
			bike.LockInfo.State.Returns(LockingState.UnknownDisconnected);

			var subsequent = handler.HandleRequestOption2().Result;

			// Verify behavior
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopAsync(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "The lock bolt moves through the spokes of the rear wheel.";
				locks[0].CloseAsync();
				bikesViewModel.ActionText = string.Empty;
				viewService.DisplayAdvancedAlert(
					"Lock could not be closed!",
					"Exception message.",
					"Please try again.",
					"OK"
				);
				bikesViewModel.ActionText = "Reading charging level...";
				locks[0].GetBatteryPercentageAsync();
				bikesViewModel.ActionText = "Updating lock state...";
				connector.Command.UpdateLockingStateAsync(bike, null);
				bikesViewModel.ActionText = "Disconnecting lock...";
				locks.DisconnectAsync(Arg.Any<int>(), Arg.Any<Guid>());
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartAsync(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state after action
			Assert.AreEqual("Reserve bike", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual(nameof(DisposableDisconnected), subsequent.LockitButtonText);
			Assert.IsFalse(subsequent.IsLockitButtonVisible);
		}
	}
}