namespace BLAIzor.Services
{
    using System.Net.Http.Headers;
    using System.Text.Json;

    public class WhisperTranscriptionService
    {
        private readonly IConfiguration _configuration;
        private readonly IHttpClientFactory _httpClientFactory;
        private string _apiKey = ""; // Store this securely!

        public WhisperTranscriptionService(IHttpClientFactory httpClientFactory, IConfiguration configuration)
        {
            _httpClientFactory = httpClientFactory;
            _configuration = configuration;
        }

        private string GetApiKey() =>
            _configuration?.GetSection("OpenAI")?.GetValue<string>("ApiKey") ?? string.Empty;

        public async Task<string?> TranscribeAsync(byte[] audioData)
        {

            _apiKey = GetApiKey();

            try
            {
                var client = _httpClientFactory.CreateClient();
                client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", _apiKey);

                var content = new MultipartFormDataContent
            {
                { new ByteArrayContent(audioData), "file", "audio.webm" },
                { new StringContent("whisper-1"), "model" }
            };

                var response = await client.PostAsync("https://api.openai.com/v1/audio/transcriptions", content);
                response.EnsureSuccessStatusCode();

                var resultJson = await response.Content.ReadAsStringAsync();
                var json = JsonDocument.Parse(resultJson);
                return json.RootElement.GetProperty("text").GetString();
            }
            catch (Exception ex)
            {
                Console.WriteLine("STT error: " + ex.Message);
                return null;
            }
        }
    }

}