```csharp
using System.Text;
using System.Text.Json;
namespace Gpt;
class Program
{
static async Task Main(string[] args)
{
var client = new HttpClient();
if (!args.Any())
{
Console.WriteLine("This program uses the OpenAI GPT API to generate text based on user prompts. ");
Console.WriteLine("It sends HTTP POST requests to the API endpoint and uses JSON deserialization to extract the generated text. ");
Console.WriteLine("Usage: gpt <prompt>");
return;
}
var prompt = string.Join(" ", args);
var request = CreateHttpRequestMessage(prompt);
var response = await GetResponse(client, request);
Console.WriteLine(
quot;GPT: {response}");
}
private static async Task<string?> GetResponse(HttpClient client, HttpRequestMessage request)
{
using var response = await client.SendAsync(request);
response.EnsureSuccessStatusCode();
var responseBody = await response.Content.ReadAsStringAsync();
var jsonResponse = JsonSerializer.Deserialize<JsonElement>(responseBody);
var choices = jsonResponse.GetProperty("choices");
return choices[0].GetProperty("text").GetString();
}
private static HttpRequestMessage CreateHttpRequestMessage(string? prompt) =>
new()
{
Method = HttpMethod.Post,
RequestUri = new Uri("https://api.openai.com/v1/completions"),
Headers =
{
{ "Authorization", "Bearer " + Environment.GetEnvironmentVariable("MY_OPEN_AI_API_KEY") }
},
Content = CreateStringContent(prompt)
};
private static StringContent CreateStringContent(string? prompt) =>
new(JsonSerializer.Serialize(new
{
model = "text-davinci-003",
prompt = prompt,
max_tokens = 200,
temperature = 0.3
}), Encoding.UTF8, "application/json");
}
```