int night= 1000;  // GUESSING ;; there is a  limitation in arduino it cannot take more then 1000  and it supposed to be 1500
int distaceinside = 100; // 3 cm gussing
int distanceoutside= 200; // 7 cm guessing
int AlarmingTime= 3000; //guessing
int Interval; 
int Blinking = 100 ; 
int SwitchValue; // if 0 inside (by defult)
int safedistance =200 ; 
int distance1;   
int distance2;   
// Ultra
#define ECHO2 7 /////////////////////
#define TRIG2  8 /////////////////////
#define ECHO1 2 /////////////////////
#define TRIG1  3 /////////////////////
#define SOUND_SPEED 0.0343    //////////////////////
// white led
#define whiteled 4 //////////////////////////
// red light
#define RedLED 5 /////////////////////////////
// buzzer 
#define buzer 6/////////////////////////
// pulldown switch 
#define Theswitch 19 /////////////////////////
// Edge
#define TheIR1 15 /////////////////////////
#define TheIR2 16 /////////////////////////
//LDR
#define photoreLDR A0//////////////////////////



void setup() {  
  Serial.begin(115200); 
 pinMode(18 , OUTPUT);
// ultra 
  pinMode(TRIG1, OUTPUT ); 
  pinMode(ECHO1, INPUT);
  pinMode(TRIG2, OUTPUT ); 
  pinMode(ECHO2, INPUT);
// LDR
  pinMode(photoreLDR, INPUT ); 
//
  pinMode(whiteled, OUTPUT );  
  pinMode(RedLED, OUTPUT );  
  pinMode(buzer, OUTPUT ); 
  pinMode(Theswitch, INPUT_PULLUP  ); 
attachInterrupt(digitalPinToInterrupt(19), IndoorOrOutdoor, CHANGE   );//2, 3, 18, 19, for intrrupt
 
}



 

// ultra get distance
void getDistance1() {
  delayMicroseconds(10);   digitalWrite(TRIG1, HIGH);   delayMicroseconds(10);   digitalWrite(TRIG1, LOW); 
  int T1 = pulseIn( ECHO1  , HIGH ); 
   distance1 = (T1 * SOUND_SPEED)/2; }

void getDistance2() {
  delayMicroseconds(10);   digitalWrite(TRIG2, HIGH);   delayMicroseconds(10);   digitalWrite(TRIG2, LOW); 
  int T2 = pulseIn( ECHO2  , HIGH ); 
   distance2 = (T2 * SOUND_SPEED)/2; }

void MoveForward() { }
void MoveBackward() {  }

void loop() { 

Serial.println(safedistance);
//know Inside or outside and get safe distance value
// IndoorOrOutdoor();


//  To operate motor 
 getDistance1() ; 
 getDistance2() ;  
if ( distance1 > safedistance) {   
// CAR CANT MOVE FORWARD ADD CODE HERE////////////////////////////////
// Alarming system
  int currenttime1= millis();   
  Interval= currenttime1 + AlarmingTime;  
while ( Interval >=  millis()) { 
  /////
  MoveBackward() ;
  ////
    digitalWrite(buzer, HIGH );
// IndoorOrOutdoor() ;// check if user  switched from out to in so safe distance chnaged 
  getDistance1() ;  // check distance if obstacle moved away
if ( distance1 > safedistance) { Interval= 0 ;    }
  else { 
   if (  millis() <= (currenttime1 + Blinking) ){ 
     digitalWrite(RedLED, HIGH ); }

  if (  millis() > (currenttime1 + Blinking) ){  
     digitalWrite(RedLED, LOW );   }

 if ( millis() >= (currenttime1 + Blinking*2 )  ) { // Blinking*2 for On, Off
  currenttime1 =  millis() ;  
     }  
 }
}
digitalWrite(RedLED, LOW);digitalWrite( buzer , LOW);   }


if ( distance2 > safedistance) {   
// CAR CANT MOVE BACKWARD ADD CODE HERE////////////////////////////////
//Alarming system
  int currenttime1= millis();   
  Interval= currenttime1 + AlarmingTime;  
while ( Interval >=  millis()) { 
  ///////
    MoveForward() ;
    ////////
    digitalWrite(buzer, HIGH );
// IndoorOrOutdoor() ;// check if user  switched from out to in so safe distance chnaged 
  getDistance2() ;  // check distance if obstacle moved away
if ( distance2 > safedistance) { Interval= 0 ;    }
  else { 
   if (  millis() <= (currenttime1 + Blinking) ){ 
     digitalWrite(RedLED, HIGH ); }

  if (  millis() > (currenttime1 + Blinking) ){  
     digitalWrite(RedLED, LOW );   }

 if ( millis() >= (currenttime1 + Blinking*2 )  ) { // Blinking*2 for On, Off
  currenttime1 =  millis() ;  
     }  
 }
}
digitalWrite(RedLED, LOW);digitalWrite( buzer , LOW); 
 }

 
}




// In or out
void IndoorOrOutdoor() { // ////// assuming outdoor  1 indoor  0 
if (digitalRead(Theswitch) == 1)   { safedistance =  distaceinside;  } 
else { safedistance =  distanceoutside;     }  
// LDR check lights to turn On/OFF
int LDRvalue= analogRead(photoreLDR);   
if (LDRvalue >= night ) { 
 digitalWrite( whiteled , HIGH);}
else { digitalWrite( whiteled , LOW);
}
}