using System.Text;
using System.Text.Json.Nodes;
using Connected.Interop;
using Connected.Net;
using Microsoft.AspNetCore.Http;

namespace Connected.Rest;

internal class JsonFormatter : ApiFormatter
{
	public const string ContentType = "application/json";

	protected override async Task<JsonNode?> OnParseArguments()
	{
		return await Context.Request.Deserialize();
	}

	protected override async Task OnRenderError(int statusCode, string message)
	{
		Context.Response.ContentType = ContentType;
		Context.Response.StatusCode = statusCode;

		if (!string.IsNullOrWhiteSpace(message))
		{
			var buffer = Encoding.UTF8.GetBytes(await Serializer.Serialize(new
			{
				Message = message
			}));

			Context.Response.ContentLength = buffer.Length;

			await Context.Response.Body.WriteAsync(buffer);
		}

		await Context.Response.CompleteAsync();
	}

	protected override async Task OnRenderResult(object content)
	{
		if (!Context.Response.HasStarted)
		{
			var buffer = content is null ? Array.Empty<byte>() : Encoding.UTF8.GetBytes(await Serializer.Serialize(content));

			Context.Response.Clear();
			Context.Response.ContentLength = buffer.Length;
			Context.Response.ContentType = ContentType;
			Context.Response.StatusCode = StatusCodes.Status200OK;

			await Context.Response.Body.WriteAsync(buffer);
		}

		await Context.Response.CompleteAsync();
	}
}