// 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      -checks the state of the Button repeatedly while printing the variables
   * Return type      - int
   * Parameters       - pin
   */
int readPinStateWithDebounce(int pin) {
  int istate = gpio_get_level(pin);
  if (istate == 0) {
    vTaskDelay(pdMS_TO_TICKS(50));
    printf("The 1st state is %d\n", istate);
    int cstate = gpio_get_level(pin);
    if (cstate == 0) {
      printf("the 2nd state is %d\n", cstate);
      return 0;
    }
    else {
      printf("button not pressed. Pinstate high = %d\n", istate);
      return 1;
    }
  }
  else {
    printf("button not pressed. Pinstate high = %d\n", istate);
    return 1;
  }
}