#include "tlv.h"

// creer un tlv
int build_tlv(tlv *tlv, cmd_token token) {
	switch(token.type) {
		case NEIGHBOUR_REQ:
			// a remplir
			break;
		case NETWORK_STATE_REQ:
			// a remplir
			break;
		case NODE_STATE_REQ:
			// a remplir
			break;
		case SEND:
			// a remplir
			break;
		case ERROR:
			printf("Wrong format, use 'req {neighbour | network state | node state}' or 'send {message}'");
			break;
	}
}

int build_pad1(tlv *tlv) {
	pad1 *new = (pad1*) malloc(sizeof(pad1));

	if(new == NULL)
		return -1;

	new->type = 0;

	tlv->pad1 = new;

	return 0;
}

int build_padn(tlv *tlv, size_t len) {
	padn *new = (padn*) malloc(sizeof(padn));

	if(new == NULL)
		return -1;

	new->type = 1;
	new->length = len;
	new->mbz = (char*) calloc(sizeof(char), len);

	tlv->padn = new;

	return 0;
}

int build_neighbour_req(tlv *tlv) {
	neighbour_req *new = (neighbour_req*) malloc(sizeof(neighbour_req));

	if(new == NULL)
		return -1;

	new->type = 2;
	new->length = 0;

	tlv->neighbour_req = new;

	return 0;
}

int build_neighbour(tlv *tlv, struct in6_addr ip, short port) {
	neighbour *new = (neighbour*) malloc(sizeof(neighbour));

	if(new == NULL)
		return -1;

	new->type = 3;
	new->length = 18;
	new->ip = ip;
	new->port = port;

	tlv->neighbour = new;

	return 0;
}

int build_network_hash(tlv *tlv, char *hash) {
	network_hash *new = (network_hash*) malloc(sizeof(network_hash));

	if(new == NULL)
		return -1;

	new->type = 4;
	new->length = 16;
	memcpy(new->network_hash, hash, 16);

	tlv->network_hash = new;

	return 0;
}

int build_network_state_req(tlv *tlv) {
	network_state_req *new = (network_state_req*) malloc(sizeof(network_state_req));

	if(new == NULL)
		return -1;

	new->type = 5;
	new->length = 0;

	tlv->network_state_req = new;

	return 0;
}

int build_node_hash(tlv *tlv, long node_id, short seqno, char *hash) {
	node_hash *new = (node_hash*) malloc(sizeof(node_hash));

	if(new == NULL)
		return -1;

	new->type = 6;
	new->length = 26;
	new->node_id = node_id;
	new->seqno = seqno;
	memcpy(new->node_hash, hash, 16);

	tlv->node_hash = new;

	return 0;
}

int build_node_state_req(tlv *tlv, long node_id) {
	node_state_req *new = (node_state_req*) malloc(sizeof(node_state_req));

	if(new == NULL)
		return -1;

	new->type = 7;
	new->length = 8;
	new->node_id = node_id;

	tlv->node_state_req = new;

	return 0;
}

int build_node_state(tlv *tlv, long node_id, short seqno, char *node_hash, char *data) {
	node_state *new = (node_state*) malloc(sizeof(node_state));
	int len = strlen(data);

	if(new == NULL)
		return -1;

	// en mettant cet octet à 0 on est surs de traiter un champ data de taille 192 max
	if(len > 192) {
		data[192] = 0;
		len = 192;
	}

	new->type = 8;
	new->length = 26 + len;
	new->node_id = node_id;
	new->seqno = seqno;
	memcpy(new->node_hash, node_hash, 16);
	memcpy(new->data, data, len);

	tlv->node_state = new;

	return 0;
}

int build_warning(tlv *tlv, char *message) {
	warning *new = (warning*) malloc(sizeof(warning));
	int len = strlen(message);

	if(new == NULL)
		return -1;

	// en mettant cet octet à 0 on est surs de traiter un champ message de taille 256 max
	if(len > 256) {
		message[256] = 0;
		len = 256;
	}

	new->type = 9;
	new->length = len;
	memcpy(new->message, message, len); 

	tlv->warning = new;

	return 0;
}