#include "app_utils.h"
#include <math.h>
#include "utils.h"
#include "wm_crypto_hard.h"

static uint32_t millis_cnt = 0;

uint32_t millis(void)
{
    return millis_cnt;
}

void millis_run_cb(void *arg)
{
    millis_cnt++;
}

void us_delay(uint32_t us)
{
    struct tls_timer_cfg timer_config = 
	{
		.is_repeat = false,
		.unit = TLS_TIMER_UNIT_US,
		.timeout = 0xFFFFFFFF,
	};

	uint8_t timer_id = tls_timer_create(&timer_config);

    if(WM_TIMER_ID_INVALID == timer_id) return;

	tls_timer_start(timer_id);

    // Perform a blocking delay
    while(tls_timer_read(timer_id) < us);

    tls_timer_destroy(timer_id);
}

void ms_delay(uint32_t ms)
{
    struct tls_timer_cfg timer_config = 
	{
		.is_repeat = false,
		.unit = TLS_TIMER_UNIT_MS,
		.timeout = 0xFFFFFFFF,
	};

	uint8_t timer_id = tls_timer_create(&timer_config);

    if(WM_TIMER_ID_INVALID == timer_id) return;

	tls_timer_start(timer_id);

    // Perform a blocking delay
    while(tls_timer_read(timer_id) < ms);

    tls_timer_destroy(timer_id);
}

uint32_t random_gen_6_digit(void)
{
	unsigned char random_buf[6] = {0};
	uint32_t output_num = 0;

	tls_crypto_random_init(0x19031998, CRYPTO_RNG_SWITCH_16);
	tls_crypto_random_bytes(random_buf, sizeof random_buf);
	tls_crypto_random_stop();

	for(uint8_t i = 0; i < sizeof random_buf; i++)
	{
		// Ensures the last digit is not 0
		if(i == (sizeof random_buf) - 1 && random_buf[i] % 10 == 0)random_buf[i]++;
		output_num += (random_buf[i] % 10) * pow(10, i);
	}

	return output_num;
}

void time_date_to_tm(const char *time_date, struct tm *time)
{
  if(!time_date) return;

  /* Months are on three letters :
     Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
  */
  const char *MONTHS[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
  const unsigned long int MONTHS_CNT = sizeof(MONTHS)/sizeof(*MONTHS);
  char month[4];
  time->tm_mon = 0;

  sscanf(time_date, "%d:%d:%d %s %d %d",
  &time->tm_hour,
  &time->tm_min,
  &time->tm_sec,
  month,
  &time->tm_mday,
  &time->tm_year);

  for(unsigned long int i = 0; i < MONTHS_CNT; i++)
  {
    if(strcasecmp(MONTHS[i], month) == 0)
    {
      time->tm_mon = i;
      break;
    }
  }

  // Adjust year value
  time->tm_year -= 1900;
}