using System.Net;
using System.Net.Http;
using Microsoft.Extensions.Options;
using EnvelopeGenerator.ReceiverUI.Options;

namespace EnvelopeGenerator.ReceiverUI.Services;

public class DocumentService(HttpClient http, IOptions<ApiOptions> apiOptions)
{
    private readonly ApiOptions _api = apiOptions.Value;

    /// <summary>
    /// Fetches the PDF bytes for the given envelope key from the API.
    /// Returns null bytes with the HTTP status code on failure.
    /// </summary>
    public async Task<(byte[]? Bytes, HttpStatusCode StatusCode)> GetDocumentAsync(string envelopeKey, CancellationToken cancel = default)
    {
        var response = await http.GetAsync($"{_api.BaseUrl}/api/Document/{Uri.EscapeDataString(envelopeKey)}", cancel);

        if (!response.IsSuccessStatusCode)
            return (null, response.StatusCode);

        var bytes = await response.Content.ReadAsByteArrayAsync(cancel);
        return (bytes, response.StatusCode);
    }
}