#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"
#include "esp_log.h"
#include "freertos/timers.h"

#define led1 4
uint8_t led_level = 0;
static const char *tag = "Main";
TimerHandle_t xTimers;
int interval = 500;
int timerID = 1;

esp_err_t init_led(void);
esp_err_t blink_led(void);
esp_err_t set_timer(void);

void vTimerCallback(TimerHandle_t pxTimer){
    ESP_LOGI(tag, "Event was called from timer");
    blink_led();
    
}

void app_main (void) {
    init_led();
    set_timer();

}

esp_err_t init_led(void) {
    gpio_set_direction(led1, GPIO_MODE_OUTPUT);
    return ESP_OK;
}

esp_err_t blink_led(void){
    led_level = !led_level;
    gpio_set_level(led1, led_level);
    return ESP_OK;
 
 }

 esp_err_t set_timer(void){
    ESP_LOGI(tag, "The timer init configuration");
    xTimers = xTimerCreate("Timer",
                            (pdMS_TO_TICKS(interval)), 
                            pdTRUE,
                            (void *)timerID, 
                            vTimerCallback
    );
    if (xTimers == NULL){
        //the timer was not created
        ESP_LOGI(tag,"The timer was not created."); 
    } else{
        if(xTimerStart(xTimers,0)!= pdPASS){
            //the timer could not be set into the active state
            ESP_LOGI(tag, "The timer could not be set into the active state");

        }
    }
    return ESP_OK;

 }