#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>


// Pinbelegungen
#define BUTTON_LEFT 2
#define BUTTON_STOP 4
#define BUTTON_RIGHT 3
#define SLIDE_SWITCH 5
#define RGB_RED 6
#define RGB_GREEN 7
#define RGB_BLUE 8
#define LED_OVERHEAT 9
#define DHT_PIN 10

// LCD Display
LiquidCrystal_I2C lcd(0x27, 16, 2);  // I2C Adresse 0x27, 16x2 Display

DHT dht(DHT_PIN, DHT22);  // DHT22 Sensor


int motorState = 0; // 0 = Stop, 1 = Links, 2 = Rechts
bool isOperating = false; // Betriebsstatus (An/Aus)
float temperature = 0.0; // Temperatur des DHT22 Sensors

void setup() {
  // Setze Pins
  pinMode(BUTTON_LEFT, INPUT_PULLUP);
  pinMode(BUTTON_STOP, INPUT_PULLUP);
  pinMode(BUTTON_RIGHT, INPUT_PULLUP);
  pinMode(SLIDE_SWITCH, INPUT_PULLUP);
  pinMode(LED_OVERHEAT, OUTPUT);

  // RGB LED Pins
  pinMode(RGB_RED, OUTPUT);
  pinMode(RGB_GREEN, OUTPUT);
  pinMode(RGB_BLUE, OUTPUT);

  // LCD Display initialisieren
  lcd.begin(16, 2);
  lcd.setBacklight(LOW);  // Hintergrundbeleuchtung aus
  lcd.clear();
  
  // Starte den DHT22
  dht.begin();

  // Begrüßungsanzeige
  lcd.setCursor(0, 0);
  lcd.print("Wendeschaltung");
  lcd.setCursor(0, 1);
  lcd.print("Chaudhary");
  delay(3000);
  lcd.clear();
}

void loop() {
  // Betriebsmodus kontrollieren
  if (digitalRead(SLIDE_SWITCH) == LOW) {
    isOperating = true;
    lcd.setBacklight(HIGH);
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Motor stopp");
    digitalWrite(RGB_RED, HIGH);
    digitalWrite(RGB_GREEN, LOW);
    digitalWrite(RGB_BLUE, LOW);
  } else {
    isOperating = false;
    lcd.setBacklight(LOW);
    lcd.clear();
  }

  // Temperaturmessung
  temperature = dht.readTemperature();
  if (temperature > 60) {
    digitalWrite(LED_OVERHEAT, HIGH);
    lcd.setCursor(0, 0);
    lcd.print("Uberhitzung");
  } else {
    digitalWrite(LED_OVERHEAT, LOW);
  }

  // Überprüfen, ob eine Richtung geändert werden soll (nur im STOPP Modus)
  if (isOperating && temperature < 60) {
    if (digitalRead(BUTTON_LEFT) == LOW && motorState == 0) {
      motorState = 1;
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Motor links");
      digitalWrite(RGB_RED, LOW);
      digitalWrite(RGB_GREEN, HIGH);
      digitalWrite(RGB_BLUE, LOW);
    }
    if (digitalRead(BUTTON_RIGHT) == LOW && motorState == 0) {
      motorState = 2;
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Motor rechts");
      digitalWrite(RGB_RED, LOW);
      digitalWrite(RGB_GREEN, LOW);
      digitalWrite(RGB_BLUE, HIGH);
    }
    if (digitalRead(BUTTON_STOP) == LOW) {
      motorState = 0;
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Motor stopp");
      digitalWrite(RGB_RED, HIGH);
      digitalWrite(RGB_GREEN, LOW);
      digitalWrite(RGB_BLUE, LOW);
    }
  }

  delay(100);  // kurze Pause, um den Schaltvorgang zu entlasten
}