#ifndef _PACKET_H_
	#define _PACKET_H_

	#include "protocol.h"
	#include <Wire.h>

	#define PKTREAD_OK                      0
	#define PKTREAD_EMPTY                   1
	#define PKTREAD_OVERFLOW                2
	#define PKTREAD_INVALID_DISCOVER_FORMAT 3
	#define PKTREAD_INVALID_MESSAGE_FORMAT  4

	class Packet {
		private:
			// 1. common
			uint8_t buf[];
			uint8_t bufsize;
			bool type; // true = discover ; false = message

			// 2. wrappers
			struct discover dsc;
			struct message  msg;

			// 3. helpers
			uint8_t read_discover(uint8_t buf[], uint8_t size);
			uint8_t read_message(uint8_t buf[], uint8_t size);

		public:
			// builds a packet from raw data and returns the status code
			uint8_t read(uint8_t buf[], uint8_t size);

			// writes the binary representation of the packet
			uint8_t write(uint8_t buf[], uint8_t size);

	};

#endif