#include "timer.h"

#include "stdint.h"
#include "string.h"

#define HAL_TIMER_NUM 32

typedef struct
{
    HAL_TimerCB_fp s_sTimerCallback;
    uint8_t position;
    int timerReload;
    int tick;
} HAL_TIMER_CALLBACK;

static HAL_TIMER_CALLBACK Timer_Callback[HAL_TIMER_NUM];

void timer_tick_check(void)
{
		int i;
    for (i = 0; i < HAL_TIMER_NUM; i++)
    {
        if (Timer_Callback[i].s_sTimerCallback != NULL)
        {
            if (++Timer_Callback[i].tick >= Timer_Callback[i].timerReload)
            {
                Timer_Callback[i].tick = 0;
                Timer_Callback[i].s_sTimerCallback();
            }
        }
    }
}

uint8_t timer_register(HAL_TimerCB_fp callback, int timerReload)
{
    uint8_t handle = 0;
		int i;
    for (i = 0; i < HAL_TIMER_NUM; i++)
    {
        if (Timer_Callback[i].s_sTimerCallback == callback)
        {
            Timer_Callback[i].timerReload = timerReload;
            Timer_Callback[i].tick = 0;
            handle = i;
            return handle;
        }
    }
    for (i = 0; i < HAL_TIMER_NUM; i++)
    {
        if (Timer_Callback[i].s_sTimerCallback == NULL)
        {
            Timer_Callback[i].s_sTimerCallback = callback;
            Timer_Callback[i].position = i;
            Timer_Callback[i].timerReload = timerReload;
            Timer_Callback[i].tick = 0;
            handle = i;
            break;
        }
    }
    return handle;
}

int timer_unregister(uint8_t *handle)
{
		uint8_t timer_index = *handle;
	
    if (handle == NULL)
    {
        return -1;
    }
    if (timer_index > HAL_TIMER_NUM)
    {
        return -2;
    }
    if (0xff != timer_index)
    {
        Timer_Callback[timer_index].s_sTimerCallback = NULL;
        Timer_Callback[timer_index].timerReload = 0;
        Timer_Callback[timer_index].tick = 0;
        *handle = 0xff;
    }
		return 0;
}