#include <Adafruit_NeoPixel.h>
#include <Servo.h>
 //induction_lamp
#define PIN 6 // Adafruit_NeoPixel
#define NUMPIXELS 16 
#define PIR_PIN 2 
//safe_passage alarm
#define trigPin_safe_passage 1
#define echoPin_safe_passage 3
#define redLed 4
#define buzzerPin 8
#define safeDistance 100 

//parking space detection
#define trigPin_parking 9
#define echoPin_parking 10
#define greenPin_parking 13
#define redPin_parking 12
//servo
#define trigPin_servo 5
#define echoPin_servo 7
#define motorPin 11
#define distanceThreshold 25

//1234 6 8910 12 13
//5 7 11 
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
Servo motor;

void setup() {
  //induction_lamp
  pixels.begin(); 
  pinMode(PIR_PIN, INPUT); 
  //safe_passage alarm
  pinMode(trigPin_safe_passage, OUTPUT);
  pinMode(echoPin_safe_passage, INPUT);
  pinMode(redLed, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
  //parking_space_detection
  pinMode(trigPin_parking, OUTPUT);
  pinMode(echoPin_parking, INPUT);
  pinMode(greenPin_parking, OUTPUT);
  pinMode(redPin_parking, OUTPUT);
  //servo
  pinMode(trigPin_servo, OUTPUT);
  pinMode(echoPin_servo, INPUT);
  motor.attach(motorPin);
  motor.write(0);


 Serial.begin(9600); 

}

void loop() {
  induction_lamp();
  safe_passage_alarm();
  parking_space_detection();
  servo();
}

void induction_lamp(){
if (digitalRead(PIR_PIN) == HIGH) {
   
    pixels.setBrightness(255);
    pixels.fill(pixels.Color(255, 255, 255)); 
    
    pixels.show(); 
    delay(10000); 
  } else {
    
    for (int i = 0; i < 256; i++) {
      pixels.fill(pixels.Color(i, i, i)); 
      pixels.show(); 
      delay(10); 
    }
    for (int i = 255; i > 0; i--) {
      pixels.fill(pixels.Color(i, i, i)); 
      pixels.show(); 
      delay(10); 
    }
  }

}

void safe_passage_alarm(){
  digitalWrite(trigPin_safe_passage, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin_safe_passage, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin_safe_passage, LOW);
  
  long duration = pulseIn(echoPin_safe_passage, HIGH);
  int distance = duration * 0.034 / 2;
  Serial.print("Safe Passage Distance: ");
  Serial.print(distance);
  Serial.println(" cm");
  
  if (distance < safeDistance) {
    for (int i = 0; i < 5; i++) {
      digitalWrite(redLed, HIGH);
      digitalWrite(buzzerPin, HIGH);
      delay(100);
      digitalWrite(redLed, LOW);
       digitalWrite(buzzerPin, LOW);
      delay(100);
    }
    delay(500);
  }
  else if (distance > safeDistance) {
  
    digitalWrite(redLed, HIGH);
    
  }

}

void parking_space_detection(){
  long duration;
  int distance;
  digitalWrite(trigPin_parking, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin_parking, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin_parking, LOW);
  
  duration = pulseIn(echoPin_parking, HIGH);
  
  distance = duration * 0.034 / 2;
  
  if (distance < 100) {
    digitalWrite(greenPin_parking, LOW);
    digitalWrite(redPin_parking, HIGH);
  } else {
    digitalWrite(greenPin_parking, HIGH);
    digitalWrite(redPin_parking, LOW);
  }

}

void servo(){
  long duration, distance;
  digitalWrite(trigPin_servo, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin_servo, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin_servo, LOW);
  duration = pulseIn(echoPin_servo, HIGH);
  distance = duration * 0.034 / 2;
  Serial.print("Servo Distance: ");
  Serial.println(distance);
  
  if (distance <= distanceThreshold ) {
    motor.write(90);
   // delay(10);
    //motor.write(0);
    
  } 
  else {
  motor.write(0);
}
}