#ifndef _PROTOCOL_H_
	#define _PROTOCOL_H_

	#include <Wire.h>

	#define DISCOVER_TTL     10000

	// discover request (c.f. class node)
	#define DISCOVER_SIZE    sizeof(uint8_t)*3 + 1
	struct discover {
		uint8_t opcode; // opcode = 0
		uint8_t wave;   // id de la wave
		uint8_t dist;   // current node's distance
	};


	#define MESSAGE_MIN_SIZE sizeof(uint8_t)*4 + 1
	#define MESSAGE_MAX_SIZE sizeof(uint8_t)*4+sizeof(uint8_t)*255 + 1
	struct message {
		uint8_t opcode; // opcode = 1
		uint8_t dist;   // distance of the last sender
		uint8_t ttl;    // time to live default = 10
		uint8_t size;   // size of message in bytes
		uint8_t data[]; // actual message
	};


	#define PROTO_SIZE       MESSAGE_MAX_SIZE
	// A <node> object is held by each node which values are determined thanks
	// to the DISCOVER requests it receives; each node broadcasts a DISCOVER
	// request every DISCOVER_TTL milliseconds
    // class node{
	// 	private:
	// 		// unique id of the node : MAC ADDR
	// 		int id;

	// 		// last received wave id
	// 		uint8_t last_wave;

	// 		// relative node-distance to the well
	// 		// WELL                  : dist = 0
	// 		// NODE1 can reach WELL  : dist = 1
	// 		// NODE2 can reach NODE1 : dist = 2
	// 		// and so on...
	// 		uint8_t dist;

	// 	public:

	// 		// send a discover request
	// 		bool discover();

	// 		// update the current node according to a (received)
	// 		// discover request
	// 		bool update(struct discover dsc);
    // };


#endif