using System;
using System.IO;
using System.Text;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using ln.http.exceptions;

namespace ln.http
{
	public class HttpRequest
	{
        Dictionary<String, String> requestHeaders;

		public IPEndPoint RemoteEndpoint { get; private set; }
        public IPEndPoint LocalEndpoint { get; private set; }

        public Uri BaseURI { get; set; }
        public Uri URI { get; private set; }

		public String Method { get; private set; }
		public String RequestURL { get; private set; }
		public String Protocol { get; private set; }

		public String Hostname { get; private set; }
		public int Port { get; private set; }

        public QueryStringParameters Query { get; private set; }

        public HttpRequest(HttpReader httpReader,IPEndPoint localEndpoint)
        {
            LocalEndpoint = localEndpoint;
            RemoteEndpoint = httpReader.RemoteEndpoint;
            Method = httpReader.Method;
            Protocol = httpReader.Protocol;
            RequestURL = httpReader.URL;

            requestHeaders = new Dictionary<string, string>(httpReader.Headers);

            Setup();
        }

        private void Setup()
        {
            SetupResourceURI();
        }

        /*
         * SetupResourceURI()
         * 
         * Setup the following fields:
         * 
         *  - Hostname
         *  - Port
         *  - BaseURI        
         *  - URI
         *  - Query        
         *         
         */
        private void SetupResourceURI()
        {
            String host = GetRequestHeader("HOST");
            String[] hostTokens = host.Split(':');

            Hostname = hostTokens[0];
            Port = (hostTokens.Length > 1) ? int.Parse(hostTokens[1]) : LocalEndpoint.Port;
            BaseURI = new UriBuilder("http", Hostname, Port).Uri;
            URI = new Uri(BaseURI, RequestURL);
            Query = new QueryStringParameters(URI.Query);
        }


        public override string ToString()
		{
            //return string.Format("[HttpRequest: RemoteEndpoint={0}, Hostname={1} Port={2} URI={4}, Method={4}, RequestURL={5}, Protocol={6} Query={7}]", RemoteEndpoint, URI, Method, RequestURL, Protocol, Hostname, Port,Query);
            return base.ToString();
		}

        public String GetRequestHeader(String name, String def = "")
		{
			name = name.ToUpper();

			if (requestHeaders.ContainsKey(name))
				return requestHeaders[name];

			return def;
		}

        public HttpResponse Redirect(string location,int status = 301)
        {
            HttpResponse httpResponse = new HttpResponse(this);
            httpResponse.AddHeader("location", location);
            httpResponse.StatusCode = status;
            httpResponse.AddHeader("content-type", "text/plain");
            httpResponse.ContentWriter.WriteLine("Redirect: {0}", location);
            return httpResponse;
        }


        //private void SendResponse()
        //{
        //    using (StreamWriter writer = new StreamWriter(this.stream))
        //    {
        //        ResponseStream.Position = 0;
        //        SetResponseHeader("Content-Length", responseStream.Length.ToString());

        //        writer.WriteLine("{0} {1} {2}", Protocol, StatusCode, HttpStatusCodes.GetStatusMessage(StatusCode));
        //        foreach (String rhName in responseHeaders.Keys){
        //            writer.WriteLine("{0}: {1}", rhName, responseHeaders[rhName]);
        //        }
        //        writer.WriteLine();
        //        writer.Flush();

        //        responseStream.CopyTo(this.stream);
        //    }
        //}


    }
}