/**
 * @file ESPAsyncTCPbuffer.h
 * @date  22.01.2016
 * @author Markus Sattler
 *
 * Copyright (c) 2015 Markus Sattler. All rights reserved.
 * This file is part of the Asynv TCP for ESP.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#ifndef ESPASYNCTCPBUFFER_H_
#define ESPASYNCTCPBUFFER_H_

//#define DEBUG_ASYNC_TCP(...)  while(((U0S >> USTXC) & 0x7F) != 0x00); os_printf( __VA_ARGS__ ); while(((U0S >> USTXC) & 0x7F) != 0x00)
//#define DEBUG_ASYNC_TCP ASYNC_TCP_DEBUG
#ifndef DEBUG_ASYNC_TCP
#define DEBUG_ASYNC_TCP(...)
#endif

#include <Arduino.h>
#include <cbuf.h>

#include "ESPAsyncTCP.h"



typedef enum { ATB_RX_MODE_NONE, ATB_RX_MODE_FREE, ATB_RX_MODE_READ_BYTES, ATB_RX_MODE_TERMINATOR, ATB_RX_MODE_TERMINATOR_STRING } atbRxMode_t;

class AsyncTCPbuffer : public Print {
  public:
    typedef std::function<size_t(uint8_t * payload, size_t length)> AsyncTCPbufferDataCb;
    typedef std::function<void(bool ok, void * ret)>                AsyncTCPbufferDoneCb;
    typedef std::function<bool(AsyncTCPbuffer * obj)>               AsyncTCPbufferDisconnectCb;

    AsyncTCPbuffer(AsyncClient * c);
    virtual ~AsyncTCPbuffer();

    size_t write(String & data);
    size_t write(uint8_t data);
    size_t write(const char * data);
    size_t write(const char * data, size_t len);
    size_t write(const uint8_t * data, size_t len);

    void flush();

    void noCallback();

    void readStringUntil(char terminator, String * str, AsyncTCPbufferDoneCb done);

    //void readBytesUntil(char terminator, char *buffer, size_t length, AsyncTCPbufferDoneCb done);
    //void readBytesUntil(char terminator, uint8_t *buffer, size_t length, AsyncTCPbufferDoneCb done);

    void readBytes(char * buffer, size_t length, AsyncTCPbufferDoneCb done);
    void readBytes(uint8_t * buffer, size_t length, AsyncTCPbufferDoneCb done);

    // void setTimeout(size_t timeout);

    void onData(AsyncTCPbufferDataCb cb);
    void onDisconnect(AsyncTCPbufferDisconnectCb cb);

    IPAddress remoteIP();
    uint16_t  remotePort();
    IPAddress localIP();
    uint16_t  localPort();

    bool connected();

    void stop();
    void close();

  protected:
    AsyncClient * _client;
    cbuf *        _TXbufferRead;
    cbuf *        _TXbufferWrite;
    cbuf *        _RXbuffer;
    atbRxMode_t   _RXmode;
    size_t        _rxSize;
    char          _rxTerminator;
    uint8_t *     _rxReadBytesPtr;
    String *      _rxReadStringPtr;

    AsyncTCPbufferDataCb       _cbRX;
    AsyncTCPbufferDoneCb       _cbDone;
    AsyncTCPbufferDisconnectCb _cbDisconnect;

    void   _attachCallbacks();
    void   _sendBuffer();
    void   _on_close();
    void   _rxData(uint8_t * buf, size_t len);
    size_t _handleRxBuffer(uint8_t * buf, size_t len);
};

#endif /* ESPASYNCTCPBUFFER_H_ */