// -----------------------------------------
// SoundScribe (TM) and related software.
// 
// Copyright (C) 2007-2011 Vannatech
// http://www.vannatech.com
// All rights reserved.
// 
// This source code is subject to the MIT License.
// http://www.opensource.org/licenses/mit-license.php
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
// -----------------------------------------

using System;
using System.Linq;
using CoreAudioTests.Common;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Vannatech.CoreAudio.Interfaces;
using Vannatech.CoreAudio.Constants;
using System.Runtime.InteropServices;

namespace CoreAudioTests.DeviceTopologyApi
{
	/// <summary>
	/// Tests all methods of the IDeviceTopology interface.
	/// </summary>
	[TestClass]
	public class IDeviceTopologyTest : TestClass<IDeviceTopology>
	{
		/// <summary>
		/// Tests that the connectors for a device topology may be received, for each available endpoint.
		/// </summary>
		[TestMethod]
		public void IDeviceTopology_GetConnector()
		{
			var tested = false;

			ExecuteDeviceActivationTest(activation =>
			{
				UInt32 count;
				activation.GetConnectorCount(out count);

				for (uint i = 0; i < count; i++)
				{
					IConnector connector;
					var result = activation.GetConnector(i, out connector);

					Marshal.FinalReleaseComObject(connector);

					AssertCoreAudio.IsHResultOk(result);
					tested = true;
				}
			});

			if (!tested) Assert.Inconclusive("The test cannot be run properly. No subunits were found.");
		}

		/// <summary>
		/// Tests that the connector count for a device topology may be received, for each available endpoint.
		/// </summary>
		[TestMethod]
		public void IDeviceTopology_GetConnectorCount()
		{
			ExecuteDeviceActivationTest(activation =>
			{
				var count = UInt32.MaxValue;
				var result = activation.GetConnectorCount(out count);

				AssertCoreAudio.IsHResultOk(result);
				Assert.AreNotEqual(UInt32.MaxValue, count, "The connector count was not received.");
			});
		}

		/// <summary>
		/// Tests that the device ID for a device topology may be received, for each available endpoint.
		/// </summary>
		[TestMethod]
		public void IDeviceTopology_GetDeviceId()
		{
			ExecuteDeviceActivationTest(activation =>
			{
				string devId = "abc123";
				var result = activation.GetDeviceId(out devId);

				AssertCoreAudio.IsHResultOk(result);
				Assert.AreNotEqual("abc123", devId, "The device ID was not received.");
			});
		}

		/// <summary>
		/// Tests that parts in a device topology may be received by ID, for each available endpoint.
		/// </summary>
		[TestMethod]
		public void IDeviceTopology_GetPartById()
		{
			ExecuteDeviceActivationTest(activation =>
			{
				IConnector connector;
				activation.GetConnector(0, out connector);

				UInt32 partId;
				string globalId;
				((IPart)connector).GetLocalId(out partId);
				((IPart)connector).GetGlobalId(out globalId);

				IPart part;
				var result = activation.GetPartById(partId, out part);
				AssertCoreAudio.IsHResultOk(result);

				string verifyId;
				part.GetGlobalId(out verifyId);
				Assert.AreEqual(globalId, verifyId, "The part received did not match the expected part.");

				Marshal.FinalReleaseComObject(connector);
				Marshal.FinalReleaseComObject(part);
			});
		}

		/// <summary>
		/// Tests that a signal path can be resolved by a device topology, for each available endpoint.
		/// </summary>
		[TestMethod]
		public void IDeviceTopology_GetSignalPath()
		{
			var tested = false;

			ExecuteDeviceActivationTest(activation =>
			{
				var allParts = TestUtilities.CreateIPartCollection();

				try
				{
					for (int p1 = 0; p1 < allParts.Count(); p1++)
					{
						for (int p2 = 0; p2 < allParts.Count(); p2++)
						{
							IPartsList partsList;
							var result = activation.GetSignalPath(allParts.ElementAt(p1), allParts.ElementAt(p2), false, out partsList);

							if ((uint)result == TestUtilities.HRESULTS.E_NOTFOUND)
								continue;

							AssertCoreAudio.IsHResultOk(result);

							var pCount = UInt32.MaxValue;
							partsList.GetCount(out pCount);

							Marshal.FinalReleaseComObject(partsList);

							Assert.AreNotEqual(UInt32.MaxValue, pCount, "There count of parts cound was not received. This indicates an error in the signal path.");
							tested = true;
						}
					}
				}
				finally
				{
					foreach (var part in allParts)
						Marshal.FinalReleaseComObject(part);
				}
			});

			if (!tested) Assert.Inconclusive("The test cannot be run properly. No valid signal paths were found.");
		}

		/// <summary>
		/// Tests that the subunits for a device topology may be received, for each available endpoint.
		/// </summary>
		[TestMethod]
		public void IDeviceTopology_GetSubunit()
		{
			var tested = false;

			ExecuteDeviceActivationTest(activation =>
			{
				UInt32 count;
				activation.GetSubunitCount(out count);

				for (uint i = 0; i < count; i++)
				{
					ISubunit subunit;
					var result = activation.GetSubunit(i, out subunit);

					Marshal.FinalReleaseComObject(subunit);

					AssertCoreAudio.IsHResultOk(result);
					tested = true;
				}
			});

			if (!tested) Assert.Inconclusive("The test cannot be run properly. No subunits were found.");
		}

		/// <summary>
		/// Tests that the subunit count for a device topology may be received, for each available endpoint.
		/// </summary>
		[TestMethod]
		public void IDeviceTopology_GetSubunitCount()
		{
			ExecuteDeviceActivationTest(activation =>
			{
				var count = UInt32.MaxValue;
				var result = activation.GetSubunitCount(out count);

				AssertCoreAudio.IsHResultOk(result);
				Assert.AreNotEqual(UInt32.MaxValue, count, "The subunit count was not received.");
			});
		}
	}
}