using Nop.Plugin.Misc.FruitBankPlugin;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Text.Json;
using System.Threading.Tasks;
using Nop.Services.Configuration;

namespace Nop.Plugin.Misc.FruitBankPlugin.Services
{

    public class OpenAiService
    {
        private readonly FruitBankSettings _settings;

        public OpenAiService(FruitBankSettings settings)
        {
            _settings = settings;
        }

        public async Task<string> AskAsync(string prompt)
        {
            using var client = new HttpClient();
            client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", _settings.ApiKey);

            var body = new
            {
                model = "gpt-4o-mini",
                messages = new[]
                {
                    new { role = "system", content = "You are a helpful assistant." },
                    new { role = "user", content = prompt }
                }
            };

            var content = new StringContent(JsonSerializer.Serialize(body), Encoding.UTF8, "application/json");
            var response = await client.PostAsync("https://api.openai.com/v1/chat/completions", content);

            var json = await response.Content.ReadAsStringAsync();
            using var doc = JsonDocument.Parse(json);

            return doc.RootElement.GetProperty("choices")[0].GetProperty("message").GetProperty("content").GetString();
        }
    }
}