#ifndef __SER_BRIDGE_H__
#define __SER_BRIDGE_H__

#include <ip_addr.h>
#include <c_types.h>
#include <espconn.h>

#define MAX_CONN 4
#define SER_BRIDGE_TIMEOUT 300 // 300 seconds = 5 minutes

// Send buffer size
#define MAX_TXBUFFER (2*1460)

enum connModes {
  cmInit = 0,	     // initialization mode: nothing received yet
  cmPGMInit,	     // initialization mode for programming
  cmTransparent,     // transparent mode
  cmPGM,	     // Arduino/AVR/ARM programming mode
  cmTelnet,	     // use telnet escape sequences for programming mode
};

typedef struct serbridgeConnData {
  struct espconn	*conn;
  enum connModes	conn_mode;	// connection mode
  uint8_t		tn_state;	// Telnet state machine state
  char			tn_opt ;	// Telnet option
  uint32_t		tn_value ;	// Telnet option value
  char			tn_vlen ;	// Telnet option value length
  uint16		txbufferlen;	// length of data in txbuffer
  char			*txbuffer;	// buffer for the data to send
  char			*sentbuffer;	// buffer sent, awaiting callback to get freed
  uint32_t		txoverflow_at;	// when the transmitter started to overflow
  bool			readytosend;	// true, if txbuffer can be sent by espconn_sent
} serbridgeConnData;

// port1 is transparent&programming, second port is programming only
void ICACHE_FLASH_ATTR serbridgeInit(int port1, int port2);
void ICACHE_FLASH_ATTR serbridgeInitPins(void);
void ICACHE_FLASH_ATTR serbridgeUartCb(char *buf, short len);
void ICACHE_FLASH_ATTR serbridgeReset();

// callback when receiving UART chars when in programming mode
extern void (*programmingCB)(char *buffer, short length);

#endif /* __SER_BRIDGE_H__ */