using System.Reflection;
using System.ServiceModel;
using AVEVA.Historian.Client.Wcf;
using AVEVA.Historian.Client.Wcf.Contracts;

namespace AVEVA.Historian.Client.Tests;

public sealed class WcfEvidenceTests
{
    [Fact]
    public void ServiceContractsUseDecompiledNamesAndNamespace()
    {
        AssertServiceContract<IHistoryServiceContract>("Hist");
        AssertServiceContract<IHistoryServiceContract2>("Hist");
        AssertServiceContract<IRetrievalServiceContract>("Retr");
        AssertServiceContract<IRetrievalServiceContract4>("Retr");
        AssertServiceContract<IStatusServiceContract>("Stat");
        AssertServiceContract<IStatusServiceContract2>("Stat");
        AssertServiceContract<IStorageServiceContract>("Storage");
        AssertServiceContract<ITransactionServiceContract>("Trx");
    }

    [Fact]
    public void RelayEvidenceIdentifiesHistorySecurityEndpointNames()
    {
        Assert.Equal("HistCert", HistorianWcfServiceNames.HistoryCertificate);
        Assert.Equal("Hist-Integrated", HistorianWcfServiceNames.HistoryIntegrated);
    }

    [Fact]
    public void KnownOperationAliasesMatchManagedWrapperEvidence()
    {
        AssertOperation<IHistoryServiceContract>(nameof(IHistoryServiceContract.GetInterfaceVersion), "GetV");
        AssertOperation<IHistoryServiceContract>(nameof(IHistoryServiceContract.OpenConnection), "Open");
        AssertOperation<IHistoryServiceContract>(nameof(IHistoryServiceContract.ValidateClient), "VldC");
        AssertOperation<IHistoryServiceContract>(nameof(IHistoryServiceContract.UpdateClientStatus), "UpdC");
        AssertOperation<IHistoryServiceContract2>(nameof(IHistoryServiceContract2.OpenConnection2), "Open2");
        AssertOperation<IHistoryServiceContract2>(nameof(IHistoryServiceContract2.ExchangeKey), "ExKey");
        AssertOperation<IRetrievalServiceContract2>(nameof(IRetrievalServiceContract2.GetTagInfosFromId), "GetTg");
        AssertOperation<IRetrievalServiceContract3>(nameof(IRetrievalServiceContract3.StartTagQuery), "QTB");
        AssertOperation<IRetrievalServiceContract4>(nameof(IRetrievalServiceContract4.GetTagExtendedPropertiesFromName), "GetTepByNm");
        AssertOperation<IStorageServiceContract>(nameof(IStorageServiceContract.OpenStorageConnection), "Open");
        AssertOperation<IStorageServiceContract>(nameof(IStorageServiceContract.LoadBlocks), "LoadB");
        AssertOperation<ITransactionServiceContract>(nameof(ITransactionServiceContract.GetInterfaceVersion), "GetV");
        AssertDefaultOperation<IRetrievalServiceContract>(nameof(IRetrievalServiceContract.StartQuery));
        AssertDefaultOperation<IRetrievalServiceContract4>(nameof(IRetrievalServiceContract4.StartEventQuery));
        AssertDefaultOperation<IStatusServiceContract>(nameof(IStatusServiceContract.GetServerTime));
        AssertDefaultOperation<IStatusServiceContract2>(nameof(IStatusServiceContract2.GetSystemParameter));
        AssertOperation<IStatusServiceContract2>(nameof(IStatusServiceContract2.GetHistorianInfo), "GETHI");
        AssertOperation<IStatusServiceContract2>(nameof(IStatusServiceContract2.PingServer), "PNGS");
        AssertOperation<IStatusServiceContract2>(nameof(IStatusServiceContract2.PingPipe), "PNGP");
    }

    [Fact]
    public void MdasBindingUsesNetTcpAndCustomContentType()
    {
        var binding = HistorianWcfBindingFactory.CreateMdasNetTcpBinding(TimeSpan.FromSeconds(5));
        var encoder = binding.CreateBindingElements().Find<MdasMessageEncodingBindingElement>();
        var endpoint = HistorianWcfBindingFactory.CreateEndpointAddress("localhost", HistorianWcfBindingFactory.DefaultPort, HistorianWcfServiceNames.History);

        Assert.NotNull(encoder);
        Assert.Equal("net.tcp://localhost:32568/Hist", endpoint.Uri.AbsoluteUri);
        Assert.Equal(MdasMessageEncoder.MdasContentType, encoder.CreateMessageEncoderFactory().Encoder.ContentType);
    }

    [Fact]
    public void CertificateBindingUsesMdasEncodingOverTransportSecurity()
    {
        var binding = HistorianWcfBindingFactory.CreateMdasNetTcpCertificateBinding(TimeSpan.FromSeconds(5));
        var elements = binding.CreateBindingElements();
        var encoder = elements.Find<MdasMessageEncodingBindingElement>();
        var security = elements.Find<System.ServiceModel.Channels.SslStreamSecurityBindingElement>();

        Assert.NotNull(encoder);
        Assert.NotNull(security);
        Assert.Equal(MdasMessageEncoder.MdasContentType, encoder.CreateMessageEncoderFactory().Encoder.ContentType);
    }

    private static void AssertServiceContract<TContract>(string name)
    {
        var attribute = typeof(TContract).GetCustomAttribute<ServiceContractAttribute>();

        Assert.NotNull(attribute);
        Assert.Equal(name, attribute.Name);
        Assert.Equal("aa", attribute.Namespace);
    }

    private static void AssertOperation<TContract>(string methodName, string operationName)
    {
        var method = typeof(TContract).GetMethod(methodName);
        var attribute = method?.GetCustomAttribute<OperationContractAttribute>();

        Assert.NotNull(attribute);
        Assert.Equal(operationName, attribute.Name);
    }

    private static void AssertDefaultOperation<TContract>(string methodName)
    {
        var method = typeof(TContract).GetMethod(methodName);
        var attribute = method?.GetCustomAttribute<OperationContractAttribute>();

        Assert.NotNull(attribute);
        Assert.Null(attribute.Name);
    }
}