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

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET -1
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

#define BUTTON_UP_PIN 12
#define BUTTON_DOWN_PIN 13
#define BUTTON_SET_PIN 14
#define BUTTON_MODE_PIN 15

int hours = 0;
int minutes = 0;
bool buttonUpPressed = false;
bool buttonDownPressed = false;
bool buttonSetPressed = false;
bool buttonModePressed = false;
unsigned long lastDebounceTime = 0;
unsigned long debounceDelay = 50;

void setup() {
  pinMode(BUTTON_UP_PIN, INPUT_PULLUP);
  pinMode(BUTTON_DOWN_PIN, INPUT_PULLUP);
  pinMode(BUTTON_SET_PIN, INPUT_PULLUP);
  pinMode(BUTTON_MODE_PIN, INPUT_PULLUP);

  Serial.begin(9600);

  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Dirección 0x3C para la pantalla OLED
    Serial.println(F("SSD1306 allocation failed"));
    for (;;);
  }

  display.display(); // Inicializar la pantalla
  delay(2000);
  display.clearDisplay(); // Limpiar la pantalla

  // Mostrar mensaje de bienvenida
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0,0);
  display.println("Sistema de Riego");
  display.println("    Bienvenido    ");
  display.display();
  delay(2000);

  // Leer ajustes de la EEPROM
  EEPROM.begin(512);
  EEPROM.get(0, hours);
  EEPROM.get(sizeof(hours), minutes);
  EEPROM.end();
}

void loop() {
  // Actualizar el tiempo si se presionan los botones correspondientes
  int upButtonState = digitalRead(BUTTON_UP_PIN);
  int downButtonState = digitalRead(BUTTON_DOWN_PIN);
  int setButtonState = digitalRead(BUTTON_SET_PIN);
  int modeButtonState = digitalRead(BUTTON_MODE_PIN);

  if (upButtonState == LOW && !buttonUpPressed) {
    buttonUpPressed = true;
    minutes++;
  }
  if (downButtonState == LOW && !buttonDownPressed) {
    buttonDownPressed = true;
    minutes--;
  }
  if (setButtonState == LOW && !buttonSetPressed) {
    buttonSetPressed = true;
    hours++;
  }
  if (modeButtonState == LOW && !buttonModePressed) {
    buttonModePressed = true;
    hours--;
  }

  if (upButtonState == HIGH && buttonUpPressed) {
    buttonUpPressed = false;
  }
  if (downButtonState == HIGH && buttonDownPressed) {
    buttonDownPressed = false;
  }
  if (setButtonState == HIGH && buttonSetPressed) {
    buttonSetPressed = false;
  }
  if (modeButtonState == HIGH && buttonModePressed) {
    buttonModePressed = false;
  }

  // Asegurarse de que los minutos y las horas permanezcan dentro del rango válido
  if (minutes < 0) {
    minutes = 59;
  }
  if (minutes > 59) {
    minutes = 0;
  }
  if (hours < 0) {
    hours = 23;
  }
  if (hours > 23) {
    hours = 0;
  }

  // Guardar ajustes en la EEPROM
  EEPROM.begin(512);
  EEPROM.put(0, hours);
  EEPROM.put(sizeof(hours), minutes);
  EEPROM.commit();
  EEPROM.end();

  // Mostrar la hora en la pantalla OLED
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0,0);
  display.print("Hora: ");
  display.print(hours);
  display.print(":");
  if (minutes < 10) {
    display.print("0");
  }
  display.println(minutes);
  display.display();
}