using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging.Abstractions;
using Xunit;
using ZB.MOM.WW.OtOpcUa.Runtime.Historian;

namespace ZB.MOM.WW.OtOpcUa.Driver.Historian.Gateway.Tests;

/// <summary>
/// Read-cutover seam tests (T10). Both assert offline construction only — the package client builds
/// its <c>GrpcChannel</c> lazily, so neither the adapter ctor nor the factory dials the gateway. A
/// bogus/unreachable endpoint must therefore construct without throwing or performing network I/O.
/// </summary>
public sealed class HistorianGatewayClientAdapterTests
{
    [Fact]
    public void Adapter_constructs_from_options_without_dialing()
    {
        // Constructing the channel must not perform network I/O (lazy connect).
        var opts = new ServerHistorianOptions { Enabled = true, Endpoint = "https://localhost:5222", ApiKey = "histgw_x_y" };
        using var adapter = HistorianGatewayClientAdapter.Create(opts, NullLoggerFactory.Instance);
        Assert.NotNull(adapter);
    }

    [Fact]
    public void Factory_builds_GatewayHistorianDataSource()
    {
        var opts = new ServerHistorianOptions { Enabled = true, Endpoint = "https://localhost:5222", ApiKey = "histgw_x_y" };
        using var services = new ServiceCollection().BuildServiceProvider();
        var dataSource = GatewayHistorian.CreateDataSource(opts, services);
        Assert.IsType<GatewayHistorianDataSource>(dataSource);
    }
}