#include "os.h"
#include "libs/task.h"
#include "bsp/bsp.h"
//one while will use 4 ins

/* below function is dumy here, will overide by xxx_rtc.c */
__weak void rtc_set_time_with_utc_second(uint32_t s){

}
__weak uint32_t rtc_get_timestamp(void){
	return 0;
}


void task_delay(int ms) {
	os_udelay(ms*1000);
}

void os_ticks_enable(void)
{
	CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk;
	DWT->CTRL |= DWT_CTRL_CYCCNTENA_Msk;
}

u32 os_ticks_abs(void)
{
	return DWT->CYCCNT;
}

u32 os_ticks_rel(u32 start)
{
	u32 ticks = DWT->CYCCNT;

	if (ticks >= start) {
		return ticks - start;
	}

	return 0xFFFFFFFF - start + ticks + 1;
}

void os_ticks_delay(u32 ticks)
{
	volatile u32 start = os_ticks_abs();
	while (os_ticks_rel(start) < ticks);
}

void os_udelay(u32 delay)
{
	os_ticks_delay(delay * (SystemCoreClock / 1000000));
}


/* set rtc time, used utc timestamp, can not include time zone*/
uint32_t calendar_to_utc(time_val *time){

	struct tm utc_time;
	struct tm my_time;
	memset(&utc_time, 0, sizeof (struct tm));
	memset(&my_time, 0, sizeof (struct tm));
	
	my_time.tm_mday = time->day;
	my_time.tm_mon = time->month- 1;
	my_time.tm_year = time->year - 1900;
	my_time.tm_hour = time->hour;
	my_time.tm_min = time->minute;
	my_time.tm_sec = time->second;

	utc_time.tm_mday = 1;
	utc_time.tm_mon = 1 - 1;
	utc_time.tm_year = 1970 - 1900;
	utc_time.tm_hour = 0;
	utc_time.tm_min = 0;
	utc_time.tm_sec = 0;

	return mktime(&my_time) - mktime(&utc_time);
}

void set_utc_time(time_val *time){
	uint32_t second = calendar_to_utc(time);
	rtc_set_time_with_utc_second(second);
}

/* get the utc readable time */
void utc_to_calendar(uint32_t second, time_val *out){
	struct tm *tm;
	tm = localtime((time_t *)&second);

	out->year = tm->tm_year + 1900;
	out->month = tm->tm_mon + 1;
	out->day = tm->tm_mday;
	out->hour = tm->tm_hour;
	out->minute = tm->tm_min;
	out->second = tm->tm_sec;
}

/*tz quarter-hour ,15min ,-48~+48*/
uint32_t get_timestamp_with_time_zone(int8_t tz){
	return (rtc_get_timestamp()+ tz*15*60);
}

uint32_t get_timestamp(void){
	return rtc_get_timestamp();
}

void get_local_time(time_val *out, int8_t tz){
	utc_to_calendar(get_timestamp_with_time_zone(tz), out);
}