// code segment 3.2
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"

int readPinStateWithDebounce(int pin);

// Button and LED pin definitions
#define BUTTON_PIN 4
#define LED_PIN 2

void app_main() {
    // Configure button as input
    gpio_set_direction(BUTTON_PIN, GPIO_MODE_INPUT);

    // Configure LED as output
    gpio_set_direction(LED_PIN, GPIO_MODE_OUTPUT);

    while (1) {
        // read the button pin with debounce
        int btnVal = readPinStateWithDebounce(BUTTON_PIN);
        
        // display the button state. 
        // Not pressed while state = 1, Pressed while state = 0
        if (btnVal == 1) { // not pressed
            vTaskDelay(pdMS_TO_TICKS(200));
            gpio_set_level(LED_PIN, 0);  // Turn off LED
        } 
        
        else { // pressed
            vTaskDelay(pdMS_TO_TICKS(200));
            gpio_set_level(LED_PIN, 1);  // Turn on LED
        }
    }
}

/* Function Name    - readPinStateWithDebounce
 * Description      - reads pin with a debounce
 * Return type      - int
 * Parameters       -integer -pin 
 */
int readPinStateWithDebounce(int pin) {
    
int btnstate = gpio_get_level(pin);

if (btnstate == 0) {
vTaskDelay(pdMS_TO_TICKS(50));
printf("Button state 1 = 0 \n");
  if (btnstate == 0) {
  printf("Button state 2 = 0 \n");
  return 0;
  }
return 1;
}

  else{
printf("Button not pressed. ");

printf("Button state = 1 \n");

return 1;

}
}