/*
  Wokwi | questions
  Button components floating.

  HexedRevii - Friday, March 27, 2026 6:04 PM
  My two button components are stuck floating,
  even though they should be wired correctly according to Arduino.
*/

#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <Wire.h>
//#include "Joystick.h"

const int NUM_BTNS = 3;
const int BTN_PINS[] = {13, 12, 11};
const int RGB_PINS[] = {6, 5, 3};

int btnState[NUM_BTNS];
int oldBtnState[NUM_BTNS];

//Joystick* joystick = NULL;
Adafruit_SSD1306 display(128, 64, &Wire, -1);

// function returns which button was pressed, or 0 if none
int checkButtons()  {
  int btnPressed = 0;

  for (int i = 0; i < NUM_BTNS; i++) {
    btnState[i] = digitalRead(BTN_PINS[i]); // check each button
    if (btnState[i] != oldBtnState[i])  {   // if it changed
      oldBtnState[i] = btnState[i];         // remember state for next time
      if (btnState[i] == 0)  {              // was just pressed
        btnPressed = i + 1;
      }
      delay(20);  // debounce
    }
  }
  return btnPressed;
}

void ledButtonCallback() {

}

void setup() {
  Serial.begin(9600);
  display.setRotation(2);
  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println("Failed to initialise display.");
    for (;;) {}
  }
  for (int i = 0; i < NUM_BTNS; i++)  {
    pinMode(BTN_PINS[i], INPUT_PULLUP);
  }
  for (int i = 0; i < 3; i++)  {
    pinMode(RGB_PINS[i], OUTPUT);
  }
  // init
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE, SSD1306_BLACK);
  display.setCursor(0, 20);
  display.print("Hello, guys");
  display.display();

  Serial.println("Ready!");
}

void loop() {
  int btnNumber = checkButtons();
  if (btnNumber)  {
    //Serial.println(btnNumber);
    for (int i = 0; i < 3; i++) {
      analogWrite(RGB_PINS[i], 0);
    }
    if (btnNumber == 1) {
      analogWrite(RGB_PINS[0], 255);
    } else if (btnNumber == 2)  {
      analogWrite(RGB_PINS[1], 255);
    } else if (btnNumber == 3)  {
      analogWrite(RGB_PINS[2], 255);
    }
  }
}