using Microsoft.Extensions.Logging.Abstractions;
using Shouldly;
using Xunit;
using ZB.MOM.WW.OtOpcUa.Host.OpcUa;

namespace ZB.MOM.WW.OtOpcUa.Host.Tests.OpcUa;

public sealed class FailedServiceLevelBindingCleanupTests
{
    [Fact]
    public async Task Successful_cleanup_observes_stop_before_disposal_and_releases_ownership()
    {
        var events = new List<string>();
        var released = await FailedServiceLevelBindingCleanup.StopAndDisposeAsync(
            () => { events.Add("stop"); return Task.CompletedTask; },
            () => { events.Add("dispose"); return ValueTask.CompletedTask; },
            NullLogger.Instance);
        events.ShouldBe(new[] { "stop", "dispose" });
        released.ShouldBeTrue();
    }

    [Fact]
    public async Task Failed_stop_still_disposes_and_retains_ownership_for_retry()
    {
        var events = new List<string>();
        var released = await FailedServiceLevelBindingCleanup.StopAndDisposeAsync(
            () => { events.Add("stop"); throw new InvalidOperationException("controlled stop failure"); },
            () => { events.Add("dispose"); return ValueTask.CompletedTask; },
            NullLogger.Instance);
        events.ShouldBe(new[] { "stop", "dispose" });
        released.ShouldBeFalse();
    }

    [Fact]
    public async Task Failed_disposal_retains_ownership_without_escaping_the_binding_failure_handler()
    {
        var events = new List<string>();
        var released = await FailedServiceLevelBindingCleanup.StopAndDisposeAsync(
            () => { events.Add("stop"); return Task.CompletedTask; },
            () => { events.Add("dispose"); throw new InvalidOperationException("controlled disposal failure"); },
            NullLogger.Instance);
        events.ShouldBe(new[] { "stop", "dispose" });
        released.ShouldBeFalse();
    }
}