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/************************************************************** 
 *
 * Module Name:	RTC module
 * File name:	app_datetime.c 
 * Brief description:
 *    RCT function for nrf52 platform
 * Author:	Eagle.Lao
 * Data:	2017-06-12
 * Revision:V0.01
****************************************************************/


#include <stdlib.h>
#include "OSAL.h"
#include <string.h>
#include <time.h>
#include "app_err.h"
#include "app_wrist.h"
#include "app_datetime.h"
#include "types.h"
#include "clock.h"
#include "log.h"

#ifndef USE_SYS_TICK
#define USE_SYS_TICK  FASLE  //default use RTC, if system use RC32K as RTC clock source, system tick is usually recommended 
#endif

#if(USE_SYS_TICK)
  #define RTC_CNT_RANGE 0x100000000
  #define TM_RATE (1000000/625)
#else
  #define RTC_CNT_RANGE 0x1000000
  #define TM_RATE (32768)
#endif
#define DT_INTV_SYNC 60    //sync interval every 60s



//static app_dtm_hdl_t s_evt_hdl = NULL;

static datetime_cfg_t s_stm_cfg = {0};

static const char* const month_str[12] = {
	"Jan",
	"Feb",
	"Mar",
	"Apr",
	"May",
	"Jun",
	"Jul",
	"Aug",
	"Sep",
	"Oct",
	"Nov",
	"Dec"
};


static void app_datetime_adjust_baseline(struct tm* datetm);

static void print_hex (uint8_t *data, uint16 len)
{
    uint16 i;

    for (i = 0; i < len - 1; i++)
    {
        LOG("%x",data[i]);
        LOG(" ");
    }
    LOG("%x",data[i]);
}

static void dt_timer_start(uint32_t intval_ms)
{
  osal_start_timerEx(AppWrist_TaskID, TIMER_DT_EVT, intval_ms);
}

void timer_cnt_get(uint32_t* tick)
{
#if(USE_SYS_TICK)
  *tick = hal_systick();         // read current RTC counter
#else
  *tick = clock_time_rtc();         // read current RTC counter
#endif
}


static void get_default_tm(struct tm* datetm)
{
	int i;
	datetime_t dtm;
	char dt[20];
	char* pstr = NULL;
	LOG(__DATE__);
	LOG(__TIME__);
	strcpy(dt, __DATE__);
	pstr = strtok(dt, " ");
	for(i = 0; i< 12; i++){
		if(strcmp(dt,month_str[i]) == 0){
			dtm.month = i+1;
			break;
		}
	}
	pstr = strtok(NULL, " ");
	dtm.day = atoi(pstr);
	pstr = strtok(NULL, " ");
	dtm.year = atoi(pstr);

	strcpy(dt, __TIME__);
	pstr = strtok(dt, ":");
	dtm.hour = atoi(pstr);
	pstr = strtok(NULL, ":");
	dtm.minutes = atoi(pstr);
	pstr = strtok(NULL, ":");
	dtm.seconds = atoi(pstr);

	DTM2TM(datetm, &dtm);
}


static void check_default_datetime(void)
{
	struct tm datetm;
	get_default_tm(&datetm);
	LOG("check_default_datetime\nTime is %d-%d-%d, %d:%d:%d",
          datetm.tm_year+1900,
          datetm.tm_mon+1,
          datetm.tm_mday,
          datetm.tm_hour,
          datetm.tm_min,
          datetm.tm_sec);
	app_datetime_adjust_baseline(&datetm);
	return;
	
}

static void datetime_print(void)
{
  datetime_t dtm;
  app_datetime(&dtm);

	LOG("Time is %d-%d-%d, %d:%d:%d\n", dtm.year, dtm.month, dtm.day, dtm.hour, dtm.minutes, dtm.seconds);

}

void app_datetime_sync_handler(void )
{
	uint32_t tick= 0;
	timer_cnt_get(&tick);
	if(tick < s_stm_cfg.snapshot)
		s_stm_cfg.tm_base += RTC_CNT_RANGE;
	s_stm_cfg.snapshot = tick;
	dt_timer_start(DATETIME_SYNC_INTERVAL);
  datetime_print();
}



static void app_datetime_adjust_baseline(struct tm* datetm)
{
	uint64_t tmstamp;
	uint32_t ticks;
	timer_cnt_get(&ticks);
	tmstamp = (uint64_t)mktime(datetm);
	LOG("%x",(uint32_t)tmstamp);
	tmstamp = tmstamp*TM_RATE;
	s_stm_cfg.tm_base = tmstamp - ticks;
	s_stm_cfg.snapshot = ticks;
	
	LOG("app_datetime_adjust_baseline:\n");
	print_hex((uint8_t*)&s_stm_cfg, sizeof(s_stm_cfg));
	LOG("\n");
}


int app_datetime_set(datetime_t dtm)
{
	struct tm tm;
	memset(&tm,0, sizeof(tm));
	DTM2TM(&tm, &dtm);
	LOG("\napp_datetime_set:\n");
	LOG("Time is %d-%d-%d, %d:%d:%d\n", dtm.year, dtm.month, dtm.day, dtm.hour, dtm.minutes, dtm.seconds);
	app_datetime_adjust_baseline(&tm);
	print_hex((uint8_t*)&s_stm_cfg, sizeof(s_stm_cfg));
	LOG("\n");
	return APP_SUCCESS;
}




int app_datetime_diff(const datetime_t* pdtm_base, const datetime_t* pdtm_cmp)
{
	time_t time_base, time_cmp;
	struct tm tm_base, tm_cmp;

	DTM2TM(&tm_base, pdtm_base);
	DTM2TM(&tm_cmp, pdtm_cmp);
	time_base = mktime(&tm_base);
	time_cmp = mktime(&tm_cmp);
	
	return (int)difftime(time_base, time_cmp);
}


time_t app_datetime_time_t(void)
{
	time_t tm = (time_t)(s_stm_cfg.tm_base / TM_RATE);
	return tm;
}

int app_datetime(datetime_t* pdtm)
{
	struct tm * ptm = NULL;
	uint32_t ticks;
	time_t tm = (time_t)(s_stm_cfg.tm_base / TM_RATE);
	timer_cnt_get(&ticks);
	if(s_stm_cfg.snapshot > ticks)
		tm += RTC_CNT_RANGE/TM_RATE;
	tm += ticks/TM_RATE;

	ptm = localtime(&tm);

	TM2DTM(pdtm, ptm)
	
	return APP_SUCCESS;
}

void app_datetime_init(void)//app_dtm_hdl_t evt_hdl)
{

	//s_evt_hdl = evt_hdl;
	check_default_datetime();
	dt_timer_start(DATETIME_SYNC_INTERVAL);

}