using System.Net.Http.Json;
using System.Text.Json;
using EnvelopeGenerator.ReceiverUI.Models;
using EnvelopeGenerator.ReceiverUI.Options;
using Microsoft.Extensions.Options;

namespace EnvelopeGenerator.ReceiverUI.Services;

public class SignatureService(HttpClient http, IOptions<ApiOptions> apiOptions)
{
    private static readonly JsonSerializerOptions _jsonOptions = new(JsonSerializerDefaults.Web);

    public async Task<IReadOnlyList<SignatureDto>> GetAsync(string envelopeKey, CancellationToken cancel = default)
    {
        var url = $"{apiOptions.Value.BaseUrl}/api/Signature/{Uri.EscapeDataString(envelopeKey)}";
        var response = await http.GetAsync(url, cancel);

        if (!response.IsSuccessStatusCode)
            throw new HttpRequestException($"Failed to retrieve signatures for envelope {envelopeKey}: {response.StatusCode} {response.ReasonPhrase}");

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