using System.Net.Http;
using System.Net.Http.Json;
using System.Text.Json;
using EnvelopeGenerator.Server.Client.Models;

namespace EnvelopeGenerator.Server.Client.Services;

/// <summary>
/// Retrieves annotation positions from the API.
/// Uses relative paths (/api/Annotation/{envelopeKey}).
/// </summary>
[Obsolete("Use SignatureService.")]
public class AnnotationService(IHttpClientFactory httpClientFactory)
{
    private static readonly JsonSerializerOptions _jsonOptions = new(JsonSerializerDefaults.Web);

    public async Task<IReadOnlyList<AnnotationDto>> GetAnnotationsAsync(string envelopeKey, CancellationToken cancel = default)
    {
        using var http = httpClientFactory.CreateClient("EnvelopeGenerator.Server");
        var url = $"/api/Annotation/{Uri.EscapeDataString(envelopeKey)}";
        var response = await http.GetAsync(url, cancel);

        if (!response.IsSuccessStatusCode)
            return [];

        var result = await response.Content.ReadFromJsonAsync<List<AnnotationDto>>(_jsonOptions, cancel);
        return result ?? [];
    }
}