using System.Text;
using System.Text.Json.Nodes;

namespace FsTool.Helpers
{
    public static class Extensions
    {
        #region Public Method FsPostAsync

        /// <summary>
        ///     Sends a POST request to the specified URI with the provided JSON content.
        /// </summary>
        /// <param name="httpClient">The instance of <see cref="HttpClient" /> used to send the request.</param>
        /// <param name="requestUri">The URI to which the request is sent.</param>
        /// <param name="jsonObject">The JSON object to include in the request body.</param>
        /// <returns>A task that represents the asynchronous operation. The task result contains the HTTP response.</returns>
        public static async Task<HttpResponseMessage> FsPostAsync(this HttpClient httpClient, string requestUri, JsonObject jsonObject)
        {
            var content = new StringContent(jsonObject.ToString(), Encoding.UTF8, "application/json");
            content.Headers.ContentType = new("application/json");
            return await httpClient.PostAsync(requestUri, content);
        }

        #endregion

        #region Public Method ToList

        /// <summary>
        ///     Converts the specified JSON node into a list of non-null <see cref="JsonNode" /> elements.
        /// </summary>
        /// <param name="node">The <see cref="JsonNode" /> to be converted. If null, an empty list is returned.</param>
        /// <returns>A list of <see cref="JsonNode" /> instances containing non-null elements.</returns>
        public static List<JsonNode> ToList(this JsonNode? node)
        {
            var array = node?.AsArray() ?? [];
            return array.Where(x => x != null).Select(x => x!).ToList();
        }

        #endregion
    }
}