using Microsoft.AspNetCore.Mvc.Filters;
using ServiceShared;

namespace ServiceOutside.Filter
{
    public class ServiceInsideRequest : Attribute, IAsyncResultFilter, IAsyncAuthorizationFilter
    {
        /// <summary>
        /// IP of ServiceInside
        /// </summary>
        private static string ServiceInsideIP = "";

        /// <summary>
        /// If log type is debug, request headers will be printed out in the console
        /// </summary>
        private static Log.Types _LogType = Log.Types.INFO;

        /// <summary>
        /// Sets the log type
        /// </summary>
        /// <param name="Log.Types">Log.Types</param>
        public static void SetLog(Log.Types logType)
        {
            _LogType = logType;
        }

        /// <summary>
        /// Sets the IP of ServiceInside
        /// </summary>
        /// <param name="serviceInsideIP">IP of ServiceInside</param>
        public static void SetServiceInsideIP(string serviceInsideIP)
        {
            ServiceInsideIP = serviceInsideIP;
        }

        public virtual async Task OnAuthorizationAsync(AuthorizationFilterContext context)
        {
            if(context == null || context.HttpContext == null || context.HttpContext.Connection == null || context.HttpContext.Connection.RemoteIpAddress == null ||
              context.HttpContext.Connection.RemoteIpAddress.ToString() != ServiceInsideIP)
            {
                return;
            }
        }

        /// <summary>
        /// Logs request in debug mode
        /// </summary>
        /// <param name="context"></param>
        /// <param name="next"></param>
        /// <returns></returns>
        public async Task OnResultExecutionAsync(ResultExecutingContext context, ResultExecutionDelegate next)
        {
            if (_LogType == Log.Types.DEBUG)
            {
                string headers = "";

                foreach (var header in context.HttpContext.Request.Headers)
                {
                    headers += header.Key + "=" + header.Value + "\r\n";
                }

                string? message = "";

                if (context != null &&
                   context.HttpContext != null &&
                   context.HttpContext.Connection != null &&
                   context.HttpContext.Connection.RemoteIpAddress != null)
                {
                    message = context.HttpContext.Connection.RemoteIpAddress.ToString() + " " +
                              context.ActionDescriptor.DisplayName + "\r\nHeaders:" + headers;

                }

                Log.Debug(message);
            }

            await next();
        }
    }
}