using System.Net;
using System.Text;

namespace Server
{
    class Program
    {
        static void HandleMissingPath(HttpListenerResponse response)
        {
            response.StatusCode = 404;
            string errorMessage = "Not Found";
            byte[] buffer = Encoding.UTF8.GetBytes(errorMessage);
            response.ContentType = "text/plain";
            response.ContentLength64 = buffer.Length;
            response.OutputStream.Write(buffer, 0, buffer.Length);
            response.OutputStream.Write(buffer, 0, buffer.Length);
        }
        static void Main()
        {
            // create server
            HttpListener listener = new HttpListener();
            // routes need to be added first
            listener.Prefixes.Add("http://localhost:5000/api/getall/");
            listener.Prefixes.Add("http://localhost:5000/api/gettopten/");
            listener.Prefixes.Add("http://localhost:5000/api/getuser/");
            listener.Prefixes.Add("http://localhost:5000/api/reset/");
            listener.Prefixes.Add("http://localhost:5000/api/createp/");
            listener.Prefixes.Add("http://localhost:5000/api/register/");
            listener.Prefixes.Add("http://localhost:5000/api/login/");
            listener.Prefixes.Add("http://localhost:5000/api/createlog/");

            // listen
            listener.Start();
            Console.WriteLine("Server is listening on http://localhost:5000/");
            while (true)
            {
                HttpListenerContext context = listener.GetContext();
                HttpListenerRequest request = context.Request;
                HttpListenerResponse response = context.Response;
                // url after localhost:5000/
                string uri;
                if (request != null && request.Url != null)
                {
                    uri = request.Url.AbsolutePath;
                }
                else
                {
                    return;
                }
                switch (request.HttpMethod)
                {
                    case "GET":
                        switch (uri)
                        {
                            case "/api/reset":
                                Reset.HandleRequest(request, response);
                                break;
                            case "/api/getall":
                                /* Thread clientThread = new Thread(() => Getall.HandleRequest(request, response)); */
                                /* clientThread.Start(); */
                                Getall.HandleRequest(request, response);
                                break;
                            case "/api/gettopten":
                                Gettopten.HandleRequest(request, response);
                                break;
                            case "/api/getuser":
                                Getuser.HandleRequest(request, response);
                                break;
                            case "/api/createp":
                                CreateProcedure.HandleRequest(request, response);
                                break;
                            default:
                                HandleMissingPath(response);
                                break;
                        }
                        break;
                    case "POST":
                        if (request.HasEntityBody)
                            switch (uri)
                            {
                                case "/api/register":
                                    Register.HandleRequest(request, response);
                                    break;
                                case "/api/login":
                                    Login.HandleRequest(request, response);
                                    break;
                                case "/api/createlog":
                                    CreateLog.HandleRequest(request, response, context);
                                    break;
                                default:
                                    HandleMissingPath(response);
                                    break;
                            }
                        else
                        {
                            HandleMissingPath(response);
                        }
                        break;
                    default:
                        HandleMissingPath(response);
                        break;
                }

                // try catch is neccessary because if you send a post with no
                // body the HTTPLIstener sends response automatically. Which
                // would crash the server since i try to send response but
                // respose has already been sent. It took me only 2 hours :)
                /* try */
                /* { */
                /*     // send the response */
                /*     response.OutputStream.Close(); */
                /* } */
                /* catch */
                /* { */
                /*     Console.WriteLine("Tried sending post with no body"); */
                /* } */
            }
        }
    }
}