using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging.Abstractions;
using Shouldly;
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);
    }

    /// <summary>
    /// archreview 06/S-11 — an enabled historian with an empty <c>Endpoint</c> must fail with a
    /// named, config-key-carrying <see cref="InvalidOperationException"/> (defense-in-depth for any
    /// caller that bypasses the Host's <c>ServerHistorianOptionsValidator</c>), not the raw
    /// <see cref="UriFormatException"/> that <c>new Uri("")</c> throws deep in the factory. Current
    /// code throws <see cref="UriFormatException"/> → this is the failing-first (RED) repro.
    /// </summary>
    [Fact]
    public void Create_with_empty_endpoint_throws_named_config_error()
    {
        var opts = new ServerHistorianOptions { Enabled = true, Endpoint = "", ApiKey = "histgw_x_y" };

        var ex = Should.Throw<InvalidOperationException>(
            () => HistorianGatewayClientAdapter.Create(opts, NullLoggerFactory.Instance));
        ex.Message.ShouldContain("ServerHistorian:Endpoint");
    }

    /// <summary>
    /// archreview 06/S-11 companion — a non-empty but unparseable / non-absolute <c>Endpoint</c> must
    /// also fail with the same named <see cref="InvalidOperationException"/>, not a raw
    /// <see cref="UriFormatException"/>. RED on current code.
    /// </summary>
    [Fact]
    public void Create_with_malformed_endpoint_throws_named_config_error()
    {
        var opts = new ServerHistorianOptions { Enabled = true, Endpoint = "not a uri", ApiKey = "histgw_x_y" };

        var ex = Should.Throw<InvalidOperationException>(
            () => HistorianGatewayClientAdapter.Create(opts, NullLoggerFactory.Instance));
        ex.Message.ShouldContain("ServerHistorian:Endpoint");
    }

    [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);
    }
}