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

int readPinStateWithDebounce(int pin); //Function declaration (JI)

// Pin definitions
#define BUTTON_PIN 4  // Button connected to GPIO 4
uint8_t led_pins[] = {38, 37, 36, 35, 0, 45, 48, 47}; //8-bit unsigned int array for LEDs w/ their GPIO pins. Uint8 array saves memory. (JI)

void app_main() {
    gpio_set_direction(BUTTON_PIN, GPIO_MODE_INPUT); //Setting the button as an input. (JI)

    for (int i = 0; i < 8; i++) { //For-loop to initialize all LEDs as outputs. (JI)
        gpio_set_direction(led_pins[i], GPIO_MODE_OUTPUT); //"i" iterates through each LED. (JI)
    }

    while (1) {
        int btnState = readPinStateWithDebounce(BUTTON_PIN); //Reading the button state through the function and storing the value in a variable. (JI)

        if (btnState == 1) { //If the button is not pressed, set all the LEDs to low. (JI)
            for (int i = 0; i < 8; i++) {
                gpio_set_level(led_pins[i], 0); 
            }
        } else {
            for (int i = 0; i < 8; i++) { //If the button pressed, set all the LEDs to high. (JI)
                gpio_set_level(led_pins[i], 1);
            }
        }

        vTaskDelay(pdMS_TO_TICKS(200));  // Small delay to prevent excessive looping
    }
}

int readPinStateWithDebounce(int pin) { //Debounce function definition. (JI)
    
    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 to validate button is not or IS pressed. (JI)
      int currentState = gpio_get_level(pin);
        if (currentState == 0){
          printf("Button pressed. Pin state 2 = %d\n\n", currentState); //Print the value of currentState to validate is not or IS pressed. (JI)
        } else {
          printf("Button not pressed. Pin state high = 1\n\n"); //If not the button is not pressed, print a message to validate. (JI)
          return 1;
      }
      return 0;

    } else {
      printf("Button not pressed. Pin state high = 1\n\n"); //If the button is not pressed, print a message to validate. (JI)

      return 1;

    }

    
    }