#include "global.h"
#include "mqtt.h"
#include "client.h"


io_enableDEBUG;

extern char compiled[], compiledby[], compilehost[];

struct tagArgs *args;


static void
Usage(void)
{
	printf(	" -= MQTT PING =- MQTT Ping from ELWIX\n"
		"=== %s@%s === Compiled: %s ===\n\n"
		" Syntax: mqtt_ping [options] <connect_to_broker[:port]> <ConnectID>\n\n"
		"\t-c <num>\t\tNumber of ping requests (default: 1)\n"
		"\t-p <port>\t\tDifferent port for connect (default: 1883)\n"
		"\t-T <timeout>\t\tKeep alive timeout in seconds (default: 10sec)\n"
		"\t-U <username>\t\tUsername\n"
		"\t-P <password>\t\tPassword\n"
		"\t-v\t\t\tVerbose (more -vvv, more verbose)\n"
		"\t-h\t\t\tHelp! This screen\n\n", 
		compiledby, compilehost, compiled);
}

static void
cleanArgs(struct tagArgs * __restrict args)
{
	mqtt_msgFree(&args->msg, 42);
	AIT_FREE_VAL(&args->User);
	AIT_FREE_VAL(&args->Pass);
	AIT_FREE_VAL(&args->ConnID);
}

static int
Ping(int sock, int num)
{
	int siz = 0;
	struct timeval before, after;
	ait_val_t val;
	struct mqtthdr *hdr;

	gettimeofday(&before, NULL);

	siz = mqtt_msgPINGREQ(args->msg);
	if (siz == -1) {
		printf("Error:: msgPINGREQ #%d - %s\n", mqtt_GetErrno(), mqtt_GetError());
		return -1;
	}
	if (SendTo(sock, siz) == -1)
		return -1;

reply:
	if ((siz = RecvFrom(sock)) == -1 || !siz)
		return -1;
	else
		hdr = (struct mqtthdr*) args->msg->msg_base;
	if (hdr->mqtt_msg.type == MQTT_TYPE_PINGREQ) {
		siz = mqtt_msgPINGRESP(args->msg);
		if (siz == -1) {
			printf("Error:: msgPINGRESP #%d - %s\n", mqtt_GetErrno(), mqtt_GetError());
			return -1;
		}
		if (SendTo(sock, siz) == -1)
			return -1;

		goto reply;
	} else {
		siz = mqtt_readPINGRESP(args->msg);
		if (siz == -1) {
			printf("Error:: readPINGRESP #%d - %s\n", mqtt_GetErrno(), mqtt_GetError());
			return -1;
		}
	}

	gettimeofday(&after, NULL);

	printf(" + Ping %d MQTT broker %s ... %f sec.\n", num, io_n2addr(&args->addr, &val), 
			((after.tv_sec - before.tv_sec) + (after.tv_usec - before.tv_usec) / 1.e6));
	AIT_FREE_VAL(&val);

	return 0;
}


int
main(int argc, char **argv)
{
	char ch;
	ait_val_t val;
	u_short port = atoi(MQTT_PORT);
	int sock, num = 1, ret = 0, lost = 0;
	register int i;

	if (!(args = malloc(sizeof(struct tagArgs)))) {
		printf("Error:: in alloc arguments #%d - %s\n", errno, strerror(errno));
		return 1;
	} else
		memset(args, 0, sizeof(struct tagArgs));
	args->free = cleanArgs;

	if (!(args->msg = mqtt_msgAlloc(USHRT_MAX))) {
		printf("Error:: in mqtt buffer #%d - %s\n", mqtt_GetErrno(), mqtt_GetError());
		args->free(args);
		free(args);
		return 1;
	}

	AIT_SET_STR(&args->ConnID, "");
	AIT_SET_STR(&args->User, "");
	AIT_SET_STR(&args->Pass, "");

	args->ka = MQTT_KEEPALIVE;
	while ((ch = getopt(argc, argv, "T:U:P:p:c:vh")) != -1)
		switch (ch) {
			case 'c':
				num = (int) strtol(optarg, NULL, 0);
			case 'T':
				args->ka = (u_short) strtol(optarg, NULL, 0);
				break;
			case 'U':
				AIT_FREE_VAL(&args->User);
				AIT_SET_STR(&args->User, optarg);
				break;
			case 'P':
				AIT_FREE_VAL(&args->Pass);
				AIT_SET_STR(&args->Pass, optarg);
				break;
			case 'p':
				port = (u_short) strtol(optarg, NULL, 0);
				break;
			case 'v':
				io_incDebug;
				break;
			case 'h':
			default:
				args->free(args);
				free(args);
				Usage();
				return 1;
		}
	argc -= optind;
	argv += optind;
	if (argc < 2) {
		printf("Error:: host for connect not found or connection id!\n\n");
		args->free(args);
		free(args);
		Usage();
		return 1;
	} else {
		AIT_FREE_VAL(&args->ConnID);
		AIT_SET_STR(&args->ConnID, argv[1]);
	}
	if (!io_gethostbyname(*argv, port, &args->addr)) {
		printf("Error:: host not valid #%d - %s\n", io_GetErrno(), io_GetError());
		args->free(args);
		free(args);
		Usage();
		return 1;
	}
	printf("Connecting to %s:%d ... ", io_n2addr(&args->addr, &val), io_n2port(&args->addr));
	AIT_FREE_VAL(&val);

	if ((sock = InitClient()) == -1) {
		args->free(args);
		free(args);
		return 2;
	}

	switch ((ret = ConnectClient(sock))) {
		case -1:
			printf(">> FAILED!\n");
			break;
		case MQTT_RETCODE_ACCEPTED:
			printf(">> OK\n");
			break;
		case MQTT_RETCODE_REFUSE_VER:
			printf(">> Incorrect version\n");
			break;
		case MQTT_RETCODE_REFUSE_ID:
			printf(">> Incorrect connectID\n");
			break;
		case MQTT_RETCODE_REFUSE_UNAVAIL:
			printf(">> Service unavailable\n");
			break;
		case MQTT_RETCODE_REFUSE_USERPASS:
			printf(">> Refuse user/pass\n");
			break;
		case MQTT_RETCODE_DENIED:
			printf(">> DENIED.\n");
			break;
	}

	if (ret == MQTT_RETCODE_ACCEPTED) {
		for (i = 0; i < num; i++)
			if ((ret = Ping(sock, i))) {
				ret = 3;
				lost++;
			}
		CloseClient(sock);

		printf("\nMQTT ping sended %d requests with %d lost responses\n", num, lost);
	} else {
		close(sock);
		ret = 4;
	}

	args->free(args);
	free(args);
	return ret;
}