using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.ServiceModel.Dispatcher;
using System.Runtime.Serialization;
using DeiNiu.Utils;
using DeiNiu.wms.Data.Model;
using System.Net;

namespace WcfServiceAuthentication
{
    public class AuthenticationInspector : IDispatchMessageInspector  
    {
        public static int testUserId = 0;
        public static Dictionary<int, string> authCach = new Dictionary<int, string>();
        public static Dictionary<int, int> tmpCodes = new Dictionary<int, int>();

        static string[] publicServices = { "/Login.svc", "/PortalService.svc", "/MobileService.svc", "/ScheduledService.svc", "/android.svc/login" };      

        public object AfterReceiveRequest(ref System.ServiceModel.Channels.Message request, System.ServiceModel.IClientChannel channel, System.ServiceModel.InstanceContext instanceContext)
        {
            //注意引用 System.Runtime.Serialization

             string userIdKey = "UserId";
            string tokenKey = "Token";
            string tmpTokenKey = "tmpToken";
            int tmpToken = 0;
            int userId =0;
            // string Password = request.Headers.GetHeader<string>("Password", "www.test.com");
            string token = "";
            string requestPath = channel.LocalAddress.Uri.AbsolutePath;
            
            WebHeaderCollection headerCollection = System.ServiceModel.Web.WebOperationContext.Current.IncomingRequest.Headers;
            foreach (string item in headerCollection)
            {
                if (item == userIdKey)
                    userId = Convert.ToInt32(headerCollection.Get(item));
                if (item == tokenKey)
                    token =  headerCollection.Get(item) ;
                if (item == tmpTokenKey)
                {
                    tmpToken = Convert.ToInt16(headerCollection.Get(item));
                  
                }
                    
            }
          
            if (publicServices.Contains(requestPath))
            {
                return null;
            }
            string methdPath = request.Properties.Via.AbsolutePath;
            if (publicServices.Contains(methdPath))
            {
                 return null;
            }
           
  
          

            if (userId == 0)
            {
                try { 
                userId = request.Headers.GetHeader<int>("UserId", "www.deinu.com");
                // string Password = request.Headers.GetHeader<string>("Password", "www.test.com");
                token = request.Headers.GetHeader<string>("Token", "www.deinu.com");
                }catch(System.ServiceModel.MessageHeaderException er)
                {

                }
            }
             LogHelper.debug("svr AuthenticationInspector", string.Format("request: {2},set UserId : {0},set token: {1}", userId, token, request.ToString()));

            if (!validUser(userId, token)) // not in cache 
            {
                LogHelper.debug("svr AuthenticationInspector auth error", string.Format("request: {2},set UserId : {0},set token: {1}", userId, token, request.ToString()));
                throw new DeiNiuTimeOutException(WmsConstants.WCF_UN_AUTH_MESSAGE); 
            }
            if (tmpToken > 0)
            {
                tmpCodes[userId] = tmpToken;
            }
            return null;  
        }

        public void BeforeSendReply(ref System.ServiceModel.Channels.Message reply, object correlationState)
        {
            string res = reply.ToString();
            return;
        }

        public static bool validUser(int userId, string token)
        {
         //  
            if (authCach.ContainsKey(userId)) //检查内存
            {
                 LogHelper.debug("AuthenticationInspector", string.Format("get userId {0} in the cache checking token {1},token match? {2}", userId, token, authCach[userId].Equals(token)));
#if DEBUG

                 if (!authCach[userId].Equals(token))
                 {
                     Employee em1 = new Employee();
                     try
                     {
                         if (em1.login(token) && em1.ID == userId)
                         {
                             LogHelper.debug("AuthenticationInspector", string.Format("valid token {0} in the db and token match ", token));
                             authCach[userId] = token;
                             return true;
                         }
                     }
                     catch
                     {
                         return false;
                     }
                 }
#endif
                return authCach[userId].Equals(token);

            }

            //检查db
            Employee em = new Employee();
            try
            {
                if (em.login(token) && em.ID == userId)
                {
                   LogHelper.debug("AuthenticationInspector", string.Format("valid token {0} in the db and token match ",  token ));
                    authCach[userId] = token;
                    return true;
                }
            }
            catch
            {
                return false;
            }
            return false;
        }


    }
}