// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System;
using System.Threading;
using System.Threading.Tasks;
using Xunit;
 
#pragma warning disable MEAI001 // Type is for evaluation purposes only and is subject to change or removal in future updates.
 
namespace Microsoft.Extensions.AI;
 
public class OpenAIRealtimeClientTests
{
    [Fact]
    public void Ctor_InvalidArgs_Throws()
    {
        Assert.Throws<ArgumentNullException>("apiKey", () => new OpenAIRealtimeClient((string)null!, "model"));
        Assert.Throws<ArgumentNullException>("model", () => new OpenAIRealtimeClient("key", null!));
    }
 
    [Fact]
    public void GetService_ReturnsExpectedServices()
    {
        using IRealtimeClient client = new OpenAIRealtimeClient("key", "model");
 
        Assert.Same(client, client.GetService(typeof(OpenAIRealtimeClient)));
        Assert.Same(client, client.GetService(typeof(IRealtimeClient)));
        Assert.Null(client.GetService(typeof(string)));
        Assert.Null(client.GetService(typeof(OpenAIRealtimeClient), "someKey"));
    }
 
    [Fact]
    public void GetService_NullServiceType_Throws()
    {
        using IRealtimeClient client = new OpenAIRealtimeClient("key", "model");
        Assert.Throws<ArgumentNullException>("serviceType", () => client.GetService(null!));
    }
 
    [Fact]
    public void Dispose_CanBeCalledMultipleTimes()
    {
        IRealtimeClient client = new OpenAIRealtimeClient("key", "model");
        client.Dispose();
 
        // Second dispose should not throw.
        client.Dispose();
        Assert.Null(client.GetService(typeof(string)));
    }
 
    [Fact]
    public async Task CreateSessionAsync_Cancelled_Throws()
    {
        using var client = new OpenAIRealtimeClient("key", "model");
        using var cts = new CancellationTokenSource();
        cts.Cancel();
 
        var ex = await Assert.ThrowsAnyAsync<Exception>(() => client.CreateSessionAsync(cancellationToken: cts.Token));
        Assert.True(
            ex is OperationCanceledException || ex is System.Net.WebSockets.WebSocketException,
            $"Expected OperationCanceledException or WebSocketException but got {ex.GetType().FullName}");
    }
}