// Code segment 3.1
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"

// Function declaration
int readPinStateWithDebounce(int pin);

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

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

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

    while (1) {
        // read the button pin
        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
        }
    }
}

int readPinStateWithDebounce(int pin) {
    
    int initialState = gpio_get_level(pin); //Read the level of the button and store the value in a variable. (JI)

    if (initialState == 0) { //If the button is pressed, proceed with the code below. (JI)
      vTaskDelay(pdMS_TO_TICKS(50));
      printf("Button pressed. Pin state 1 = %d\n", initialState); //Print the value of initialState. (JI)
      int currentState = gpio_get_level(pin);
      if (currentState == 0){
        printf("Button pressed. Pin state 2 = %d\n\n", currentState);
      } else {
        printf("Button not pressed. Pin state high = 1\n\n");
        return 1;
      }
      return 0;

    } else {
      printf("Button not pressed. Pin state high = 1\n\n");

      return 1;

    }

    
    }