Text completion 1. (Legacy)

WARNING! - This is a legacy feature of OpenAI, it will be shut down on January 4th, 2024. Check more information: https://platform.openai.com/docs/api-reference/completions

The next code demonstrates how to give a simple instruction (prompt). The whole answer generated on the OpenAI side remotelly, than the answer will send in a response.

public static async Task Main(string[] args)
{
    using var host = Host.CreateDefaultBuilder(args)
        .ConfigureServices((builder, services) =>
        {
            services.AddForgeOpenAI(options => {
                options.AuthenticationInfo = builder
                    .Configuration["OpenAI:ApiKey"]!;
            });
        })
        .Build();

    IOpenAIService openAi = host.Services.GetService<IOpenAIService>()!;

    // in this scenario the answer generated on server side, 
    // than the whole text will be sent in one pass.
    // this method is useful for small conversatons and for short answers

    TextCompletionRequest request = new TextCompletionRequest();
    request.Prompt = "Say this is a test";

    HttpOperationResult<TextCompletionResponse> response = 
        await openAi.TextCompletionService
            .GetAsync(request, CancellationToken.None)
                .ConfigureAwait(false);

    if (response.IsSuccess)
    {
        response.Result!.Completions.ForEach(c => Console.WriteLine(c.Text));

        request.Prompt = "Are you sure?";

        response = await openAi.TextCompletionService
            .GetAsync(request, CancellationToken.None).ConfigureAwait(false);

        if (response.IsSuccess)
        {
            response.Result!.Completions.ForEach(c => Console.WriteLine(c.Text));
        }
        else
        {
            Console.WriteLine(response);
        }
    }
    else
    {
        Console.WriteLine(response);
    }

}