// Pin assignment
// Input pins
const int hallSensorFrontPin = 7; // Hall sensor front pin (white light)    //replaced with sliding switch
const int hallSensorBackPin = 8;  // Hall sensor back pin (red light)       //replaced with sliding switch
const int mainSwitchPin = 5;      // Main switch pin                        //green push button 
const int irSensorPin = 6;        // Infrared sensor pin                    //replaced with sliding switch
//output pins
const int whiteLedPin = 3;        // White LED pin                          
const int redLedPin = 2;          // Red LED pin
const int yellowLedPin = 4;       // Yellow LED pin

// Variables
unsigned long pressStartTime = 0; // Time when main switch was pressed
bool isAmbientMode = false;       // Status for ambient light mode
bool whiteLedOnBySwitch = false;  // Status of white LED controlled by main switch
bool yellowLedOnBySwitch = false; // Status of yellow LED controlled by main switch

void setup() {
  // Set the pin modes
  // Input pins
  pinMode(hallSensorFrontPin, INPUT);
  pinMode(hallSensorBackPin, INPUT);
  pinMode(mainSwitchPin, INPUT);
  pinMode(irSensorPin, INPUT);
  //output pins
  pinMode(whiteLedPin, OUTPUT);
  pinMode(redLedPin, OUTPUT);
  pinMode(yellowLedPin, OUTPUT);

  //Start serial communication
  Serial.begin(9600);             //set baud rate to standart 9600
  Serial.println("Arduino program started");
}
// void loop runs in a loop and runs all three functions after one another
void loop() {
  handleMainSwitch();   // jumps to function handelMainSwitch
  handleHallSensors();  // jumps to function handelHallSensor
  handleIRSensor();     // jumps to function handelIRSensor
  delay(200);           // Short wait time
}

void handleMainSwitch() {
  int mainSwitchState = digitalRead(mainSwitchPin);
  unsigned long currentTime = millis();

  // Check if the main switch is pressed for at least 500 ms and no Hall sensors are active
  if (mainSwitchState == HIGH && digitalRead(hallSensorFrontPin) == HIGH && digitalRead(hallSensorBackPin) == HIGH) {
    if (pressStartTime == 0) {
      pressStartTime = currentTime;
    } else if (currentTime - pressStartTime >= 500) {
      if (isAmbientMode) {
        // Turn off the yellow LED if main switch is pressed and lamp is in ambient mode
        yellowLedOnBySwitch = false;
        deactivateAllLEDs();
        Serial.println("Yellow LED turned off by main switch");
      } else {
        // Toggle white LED using the main switch
        whiteLedOnBySwitch = !whiteLedOnBySwitch;
        digitalWrite(whiteLedPin, whiteLedOnBySwitch ? HIGH : LOW);
        if (whiteLedOnBySwitch) {
          Serial.println("White LED turned on by main switch");
        } else {
          Serial.println("White LED turned off by main switch");
        }
      }
      pressStartTime = 0;
      delay(300); // Debounce
    }
  } else {
    pressStartTime = 0;
  }
}
*/

void handleHallSensors() {
  // Front Hall sensor controls the white LED
  if (digitalRead(hallSensorFrontPin) == LOW) {
    deactivateAllLEDs();
    digitalWrite(whiteLedPin, HIGH);
    isAmbientMode = false;
    whiteLedOnBySwitch = false;
    //Serial.println("Front Hall sensor activated - White LED on");
  } else if (!isAmbientMode && !whiteLedOnBySwitch) {
    digitalWrite(whiteLedPin, LOW);
    //Serial.println("Front Hall sensor not activated - White LED off");
  }

  // Rear Hall sensor controls the red LED
  if (digitalRead(hallSensorBackPin) == LOW) {
    deactivateAllLEDs();
    digitalWrite(redLedPin, HIGH);
    isAmbientMode = false;
    //Serial.println("Rear Hall sensor activated - Red LED on");
  } else {
    digitalWrite(redLedPin, LOW);
    //Serial.println("Rear Hall sensor not activated - Red LED off");
  }
}

void handleIRSensor() {
  if (digitalRead(irSensorPin) == LOW && whiteLedOnBySwitch) {
    delay(500); // Wait time of 500 ms
    if (digitalRead(irSensorPin) == LOW) {
      digitalWrite(whiteLedPin, LOW);
      digitalWrite(yellowLedPin, HIGH);
      isAmbientMode = true;
      whiteLedOnBySwitch = false;
      //Serial.println("IR sensor activated - Yellow LED on (Ambient Mode)");
    }
  }
}

void deactivateAllLEDs() {
  digitalWrite(whiteLedPin, LOW);
  digitalWrite(yellowLedPin, LOW);
  digitalWrite(redLedPin, LOW);
  isAmbientMode = false;
  whiteLedOnBySwitch = false;
  //Serial.println("All LEDs turned off");
}