using System.Globalization;
using ASCOM.Meade.net;
using ASCOM.Meade.net.Wrapper;
using ASCOM.Utilities.Interfaces;
using Moq;
using NUnit.Framework;

namespace Meade.net.UnitTests
{
    [TestFixture]
    public class SharedResourcesUnitTests
    {
        private Mock<ISerial> _serialMock;

        [SetUp]
        public void Setup()
        {
            _serialMock = new Mock<ISerial>();

            SharedResources.SharedSerial = _serialMock.Object;
        }

        [Test]
        public void CheckThatSerialPortIsSetToUseMock()
        {
            Assert.That(SharedResources.SharedSerial,Is.EqualTo(_serialMock.Object));
        }

        [Test]
        public void SendBlind_WhenCalled_Then_ClearsBuffersAndSendsMessage()
        {
            var expectedMessage = "Test";

            SharedResources.SendBlind(expectedMessage);

            _serialMock.Verify(x=> x.ClearBuffers(), Times.Once);
            _serialMock.Verify(x=>x.Transmit(expectedMessage), Times.Once);
        }

        [Test]
        public void SendChar_WhenCalled_ThenSendsMessageAndReadsExpectedNumberOfCharacters()
        {
            var expectedMessage = "Test";
            var expectedResult = "A";

            _serialMock.Setup(x => x.ReceiveCounted(1)).Returns(expectedResult);

            var result = SharedResources.SendChar(expectedMessage);

            _serialMock.Verify(x => x.ClearBuffers(), Times.Once);
            _serialMock.Verify(x => x.Transmit(expectedMessage), Times.Once);
            _serialMock.Verify(x => x.ReceiveCounted(1), Times.Once);
            Assert.That(result, Is.EqualTo(expectedResult));
        }

        [Test]
        public void SendString_WhenCalled_ThenSendsMessageAndReadsResultUntilTerminatorFound()
        {
            var expectedMessage = "Test";
            var expectedResult = "TestMessage#";

            _serialMock.Setup(x => x.ReceiveTerminated("#")).Returns(expectedResult);

            var result = SharedResources.SendString(expectedMessage);

            _serialMock.Verify(x => x.ClearBuffers(), Times.Once);
            _serialMock.Verify(x => x.Transmit(expectedMessage), Times.Once);
            _serialMock.Verify(x => x.ReceiveTerminated("#"), Times.Once);
            Assert.That(result, Is.EqualTo(expectedResult.TrimEnd('#')));
        }

        [Test]
        public void ReadTerminated_WhenCalled_ThenReadsResultUntilTerminatorFound()
        {
            var expectedResult = "TestMessage#";

            _serialMock.Setup(x => x.ReceiveTerminated("#")).Returns(expectedResult);

            var result = SharedResources.ReadTerminated();

            _serialMock.Verify(x => x.ReceiveTerminated("#"), Times.Once);
            Assert.That(result, Is.EqualTo(expectedResult));
        }

        [Test]
        public void ReadCharacters_WhenCalled_ThenReadsSpecificNumberOfCharacters()
        {
            var numberOfCharacters = 5;

            SharedResources.ReadCharacters(numberOfCharacters);

            _serialMock.Verify(x => x.ReceiveCounted(numberOfCharacters), Times.Once);
        }

        [Test]
        public void WriteProfile_WhenCalled_WritesExpectedProfileSettings()
        {
            string DriverId = "ASCOM.MeadeGeneric.Telescope";

            Mock<IProfileWrapper> profileWrapperMock = new Mock<IProfileWrapper>();
            profileWrapperMock.SetupAllProperties();

            IProfileWrapper profeWrapper = profileWrapperMock.Object;

            Mock<IProfileFactory> profileFactoryMock = new Mock<IProfileFactory>();
            profileFactoryMock.Setup(x => x.Create()).Returns(profileWrapperMock.Object);

            SharedResources.ProfileFactory = profileFactoryMock.Object;

            var profileProperties = new ProfileProperties();
            profileProperties.TraceLogger = false;
            profileProperties.ComPort = "TestComPort";


            SharedResources.WriteProfile(profileProperties);

            Assert.That(profeWrapper.DeviceType, Is.EqualTo("Telescope"));
            profileWrapperMock.Verify( x => x.WriteValue(DriverId, "Trace Level", profileProperties.TraceLogger.ToString()), Times.Once);
            profileWrapperMock.Verify(x => x.WriteValue(DriverId, "COM Port", profileProperties.ComPort), Times.Once);
            profileWrapperMock.Verify(x => x.WriteValue(DriverId, "Guide Rate Arc Seconds Per Second", profileProperties.GuideRateArcSecondsPerSecond.ToString(CultureInfo.CurrentCulture)), Times.Once);
            profileWrapperMock.Verify(x => x.WriteValue(DriverId, "Precision", profileProperties.Precision), Times.Once);
        }

        [Test]
        public void ReadProfile_WhenCalled_ReturnsExpectedDefaultValues()
        {
            string DriverId = "ASCOM.MeadeGeneric.Telescope";

        string ComPortDefault = "COM1";
        string TraceStateDefault = "false";
        string GuideRateProfileNameDefault = "10.077939"; //67% of sidereal rate
        string PrecisionDefault = "Unchanged";

        Mock<IProfileWrapper> profileWrapperMock = new Mock<IProfileWrapper>();
            profileWrapperMock.SetupAllProperties();

            profileWrapperMock.Setup(x => x.GetValue(DriverId, "Trace Level", string.Empty, TraceStateDefault)).Returns(TraceStateDefault);
            profileWrapperMock.Setup(x => x.GetValue(DriverId, "COM Port", string.Empty, ComPortDefault)).Returns(ComPortDefault);
            profileWrapperMock.Setup(x => x.GetValue(DriverId, "Guide Rate Arc Seconds Per Second", string.Empty, GuideRateProfileNameDefault)).Returns(GuideRateProfileNameDefault);
            profileWrapperMock.Setup(x => x.GetValue(DriverId, "Precision", string.Empty, PrecisionDefault)).Returns(PrecisionDefault);

            IProfileWrapper profeWrapper = profileWrapperMock.Object;

            Mock<IProfileFactory> profileFactoryMock = new Mock<IProfileFactory>();
            profileFactoryMock.Setup(x => x.Create()).Returns(profileWrapperMock.Object);

            SharedResources.ProfileFactory = profileFactoryMock.Object;

            var profileProperties = SharedResources.ReadProfile();

            Assert.That(profeWrapper.DeviceType, Is.EqualTo("Telescope"));
            Assert.That(profileProperties.ComPort, Is.EqualTo(ComPortDefault));
            Assert.That(profileProperties.GuideRateArcSecondsPerSecond, Is.EqualTo(double.Parse(GuideRateProfileNameDefault)));
            Assert.That(profileProperties.TraceLogger, Is.EqualTo(bool.Parse(TraceStateDefault)));
            Assert.That(profileProperties.Precision, Is.EqualTo(PrecisionDefault));
        }
    }
}