#include <stdio.h>
#include "pico/stdlib.h"

int buttonPin = 22;             // Define the GPIO pin used for the button
int buttonState = 0;            // Current button state (0 for not pressed, 1 for pressed)
int lastButtonState = 0;        // Last recorded button state
int buttonCount = 0;            // Count of button presses

void setup() {
  stdio_init_all();              // Initialize standard I/O for printing to the console

  gpio_init(22);                 // Initialize GPIO pin 22
  gpio_set_dir(22, GPIO_IN);      // Set pin 22 as an input
  gpio_set_input_hysteresis_enabled(22, 1);  // Enable input hysteresis for better button debounce

  lastButtonState = gpio_get(buttonPin);  // Initialize lastButtonState with the initial button state
                                          // This is used to store the state of the button at the previous iteration of the loop
                                          // In a nutshell, it prevents the program from printing a false button press during boot
                                          // And apparently prevents the user from holding down the button to increase the amount

  printf("Initialization done\n");  // Print an initialization message to the console
}

void loop() {
  buttonState = gpio_get(buttonPin);  // Read the current state of the button
  
  if (buttonState != lastButtonState) {
    if (buttonState == 1) {  // Check if the button has just been pressed (changed from 0 to 1)
      buttonCount++;  // Increment the button press count
      if (buttonCount == 1) {
        printf("Joku on painanut nappia nyt %d kerran!\n", buttonCount);
      } else {
        printf("Joku on painanut nappia nyt %d kertaa!\n", buttonCount);
      }
    }
  }
  
  lastButtonState = buttonState;  // Update lastButtonState with the current button state

  sleep_ms(100);  // Sleep for 100 milliseconds (button state check every 100ms)
}

int main() {
  setup();  // Call the setup function to initialize the environment
  while (true) {
    loop();  // Call the loop function repeatedly to monitor the button and print messages
  }

  return 0;
}