/*
 *  © 2021 Harald Barth
 *  © 2021 Fred Decker
 *  (c) 2021 Fred Decker.  All rights reserved.
 *  (c) 2020 Chris Harlow. All rights reserved.
 *
 *  This file is part of CommandStation-EX
 *
 *  This is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  It is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with CommandStation.  If not, see <https://www.gnu.org/licenses/>.
 */
#ifndef WifiInboundHandler_h
#define WifiInboundHandler_h

#include "RingStream.h"
#include "WiThrottle.h"
#include "DIAG.h"

class WifiInboundHandler {
 public:  
   static void setup(Stream * ESStream);
   static void loop();
   
   private:

   static WifiInboundHandler * singleton;
  
   
   enum INBOUND_STATE : byte {
        INBOUND_BUSY,     // keep calling in loop() 
        INBOUND_IDLE     // Nothing happening, outbound may xcall CIPSEND
   };      

        enum LOOP_STATE : byte {
          ANYTHING,    // ready for +IPD, n CLOSED, n CONNECTED, busy etc...
          SKIPTOEND,   // skip to newline
          
          // +IPD,client,length:data
          IPD,         // got +
          IPD1,        // got +I
          IPD2,        // got +IP
          IPD3,        // got +IPD
          IPD4_CLIENT,  // got +IPD,  reading cient id
          IPD5,        // got +IPD,c 
          IPD6_LENGTH, // got +IPD,c, reading length 
          IPD_DATA,    // got +IPD,c,ll,: collecting data
          IPD_IGNORE_DATA, // got +IPD,c,ll,: ignoring the data that won't fit inblound Ring
          IPD_PRESCAN,    // prescanning data for websocket keys
          IPD_POSTSCAN,    // copyimg data for websocket keys
          GOT_CLIENT_ID,  // clientid prefix to CONNECTED / CLOSED
          GOT_CLIENT_ID2  // clientid prefix to CONNECTED / CLOSED
  };

  
   WifiInboundHandler(Stream * ESStream);
   void loop1();
   INBOUND_STATE loop2();
   void purgeCurrentCIPSEND();
   Stream * wifiStream;
   
   static const int INBOUND_RING = 128;
   static const int OUTBOUND_RING = sizeof(void*)==2?2048:8192;
 
   static const int CIPSENDgap=100; // millis() between retries of cipsend. 
 
   RingStream * inboundRing;
   RingStream * outboundRing;
     
  LOOP_STATE loopState=ANYTHING;
  int runningClientId;   // latest client inbound processing data or CLOSE
  int dataLength; // dataLength of +IPD
  int clientPendingCIPSEND=-1;
  int currentReplySize;
  bool pendingCipsend;
  uint32_t lastCIPSEND=0; // millis() of previous cipsend
  
};
#endif