// 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) {
    
gpio_get_level(BUTTON_PIN);

if (BUTTON_PIN == 1) {
vTaskDelay(pdMS_TO_TICKS(50));
printf("Button state = %d \n", BUTTON_PIN);
 return 0;
}

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

printf("Button state = %d\n", BUTTON_PIN);

gpio_set_level(LED_PIN, 1); // Turn on LED
return 1;
}
}