/*********************************************************************************
 *      Copyright:  (C) 2022 LingYun IoT System Studio
 *                  All rights reserved.
 *
 *       Filename:  packet.c
 *    Description:  This file is packet API functions
 *
 *        Version:  1.0.0(18/04/22)
 *         Author:  Guo Wenxue <guowenxue@gmail.com>
 *      ChangeLog:  1, Release initial version on "18/04/22 16:30:25"
 *
 ********************************************************************************/

#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <time.h>
#include "packet.h"
#include "logger.h"
#include "ds18b20.h"

int get_devid(char *devid, int size, int sn)
{
	if( !devid || size<DEVID_LEN )
	{
		log_error("Invalid input arugments\n");
		return -1;
	}

	memset(devid, 0, size);
	snprintf(devid, size, "rpi#%04d", sn);
	return 0;
}

int get_time(char *strtime, int size)
{
    time_t now = time(NULL);
    struct tm *tnow = localtime(&now);

	if( !strtime || size<TIME_LEN )
	{
		log_error("Invalid input arugments\n");
		return -1;
	}

	snprintf(strtime, size, "%04d-%02d-%2d %02d:%02d:%02d",
			tnow->tm_year+1900, tnow->tm_mon+1, tnow->tm_mday,
			tnow->tm_hour, tnow->tm_min, tnow->tm_sec);

	return 0;
}

int packet_segmented_pack(pack_info_t *pack_info, char *pack_buf, int size)
{
	if( !pack_info || !pack_buf || size<=0 )
	{
		log_error("Invalid input arguments\n");
		return -1;
	}

    memset(pack_buf, 0, size);

	snprintf(pack_buf, size, "%s|%s|%d.%d", pack_info->devid, pack_info->strtime,
			temper_integer(pack_info->temper), temper_fract(pack_info->temper));

	return strlen(pack_buf);
}

int packet_json_pack(pack_info_t *pack_info, char *pack_buf, int size)
{
	if( !pack_info || !pack_buf || size<=0 )
	{
		log_error("Invalid input arguments\n");
		return -1;
	}

    memset(pack_buf, 0, size);

	snprintf(pack_buf, size, "{\"devid\":\"%s\", \"time\":\"%s\",\"temperature\":\"%d.%d\"}",
            pack_info->devid, pack_info->strtime,
            temper_integer(pack_info->temper), temper_fract(pack_info->temper));

	return strlen(pack_buf);
}