#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define OLED_ADDR 0x3C
#define OLED_SDA 21
#define OLED_SCL 22

const int buttonRightPin = 5;
const int buttonLeftPin = 18;
const int buttonCenterPin = 19;

const unsigned long debounceDelay = 50;  // Tiempo de espera para eliminar rebotes

// Variables para el debounce de cada botón
unsigned long lastDebounceTimeRight = 0;
unsigned long lastDebounceTimeLeft = 0;
unsigned long lastDebounceTimeCenter = 0;

int buttonRightState = HIGH;
int buttonLeftState = HIGH;
int buttonCenterState = HIGH;

int val = 0;

Adafruit_SSD1306 display(128, 64, &Wire, OLED_ADDR);
const int scrollSpeed = 100;  // Velocidad del scroll en milisegundos

void apagado() {
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0, 0);
  display.println("");
  display.display();
}

void hora() {
  display.clearDisplay();
  display.setTextSize(3);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(15, 20);
  display.println("10:30");
  display.display();
}

void mensaje() {
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0, 0);
  display.println("Holaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa");
  display.display();

}

void mensaje2() {
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0, 0);
  display.println("Hola");
  display.display();
}

bool checkButtonState(int buttonPin, int& buttonState, unsigned long& lastDebounceTime) {
  int reading = digitalRead(buttonPin);

  if (reading != buttonState) {
    unsigned long currentMillis = millis();
    if (currentMillis - debounceDelay >= lastDebounceTime) {
      lastDebounceTime = currentMillis;
      buttonState = reading;
      if (buttonState == LOW) {
        return true;
      }
    }
  }
  return false;
}

void setup() {
  Serial.begin(115200);
  pinMode(buttonRightPin, INPUT_PULLUP);
  pinMode(buttonLeftPin, INPUT_PULLUP);
  pinMode(buttonCenterPin, INPUT_PULLUP);
  display.begin(SSD1306_SWITCHCAPVCC, OLED_ADDR);
  // delay(2000); // Delay inicial antes de iniciar el scroll
}

void loop() {
  // Verificar el botónRight
  if (checkButtonState(buttonRightPin, buttonRightState, lastDebounceTimeRight)) {
    if (val == 3) {
      val = 2;
    } else {
      val++;
    }
  }

  // Verificar el botónLeft
  if (checkButtonState(buttonLeftPin, buttonLeftState, lastDebounceTimeLeft)) {
    if (val <= 1) {
      val = 1;
    } else {
      val--;
    }
  }

  // Verificar el botónCenter
  if (checkButtonState(buttonCenterPin, buttonCenterState, lastDebounceTimeCenter)) {
    if (val == 1) {
      val = 0;
    } else if (val == 0) {
      val = 1;
    }
    else {
      val = 1;
    }
  }

  switch (val) {
    case 0: {
        apagado();
        break;
      }
    case 1: {
        
        hora();
        break;
      }
    case 2: {
      mensaje();
        
        break;
      }
    case 3: {
        mensaje2();
        break;
      }
  }
}