#include <Servo.h>                            //includes the servo library
 
 /*create servo object*/
 Servo myServo;                                //creates the servo object




 /*define pins for the components*/
  const int bluLedPin = 5;                                  //RED LED TO PIN 5
  const int grnLedPin = 6;                                //BLUE LED TO PIN 6
  const int offSlideSwitchPin = 4;                      //off is pin 4
  const int onSlideSwitchPin = 2;                     //on is pin 2
  const int buzzerPin = 7;                          //buzzer pin 12
  const int LDRpin = A0;
bool onSlideSwitchState = true;
bool offSlideSwitchState = true;  
  const int ServoPin = 9;

/*define variables*/
int pos = 0;                                         //starting position of the servo
int bluLedState;                                   //variable for the state of blu led
int grnLedState;                                  //variable for the state of grn led
int slideSwitchState;
//int onSlideSwitchState;
//int offSlideSwitchState;
int luxAmount;                                       //variable to store Lux value
int luxThreshold = .2;                           //threshold for the lux value
unsigned long currentMillis = 0;                 //variable to store current time
unsigned long previousMillis = 0;                  //variable to store previous time
unsigned long elapsedTime = 0;                       //variable to store elapsed time
const unsigned long period = 1000;                      //variable to store the period to check periods of time

void onOffSwitch(){
/*turns on or off the led depending on switch position on/off*/
  if (onSlideSwitchState == HIGH) {digitalWrite(grnLedPin, HIGH);}
  else {digitalWrite(grnLedPin, LOW);}
  if (offSlideSwitchState == HIGH) {digitalWrite(bluLedPin, HIGH);}
  else {digitalWrite(bluLedPin, LOW);}
     currentMillis = previousMillis;
  if (currentMillis - previousMillis <= period) {digitalRead(onSlideSwitchPin);}
  if (onSlideSwitchState == LOW) {digitalWrite(bluLedPin, HIGH);} 
  else {digitalWrite(bluLedPin, LOW);}
/*end "turns on or off" the led depending on switch position on/off*/
}

void setup(){
 Serial.begin(115200);                                         //begin the serial monitor
  pinMode(bluLedPin, OUTPUT);                               //SETS PIN 5 AS OUTPUT
  pinMode(grnLedPin, OUTPUT);                              //SETS PIN 6 AS AN OUTPUT
  pinMode(onSlideSwitchPin, INPUT);                       //SETS PIN 2 AS AN INPUT
  pinMode(offSlideSwitchPin, INPUT);                    //SETS PIN 4 AS AN INPUT
  pinMode(LDRpin, INPUT);                              //SETS PIN a0 AS AN INPUT
  pinMode(buzzerPin, OUTPUT);
  
  digitalWrite(buzzerPin, LOW);
  digitalWrite(bluLedPin, LOW);                                 //TURNS blue LED off
  digitalWrite(grnLedPin, HIGH);                              //TURNS green led ON
  digitalWrite(offSlideSwitchPin, HIGH);                    //off switch is on or high (system is off)
  digitalWrite(onSlideSwitchPin, LOW);                    //on switch is off or low (system is off) 
}

 
void loop(){
myServo.attach(9);
myServo.write(180);


bluLedState = digitalRead(bluLedPin);                           //reads the current state of the blue led ie on or off
grnLedState = digitalRead(grnLedPin);                               //reads the current state of the redled ie on or off
onSlideSwitchState = digitalRead(onSlideSwitchPin);                     //reads the current state of the on switch ie on or off
offSlideSwitchState = digitalRead(offSlideSwitchPin);                       //reads the current state of the off switch ie on or off
  digitalRead(grnLedState);
  digitalRead(onSlideSwitchState);

currentMillis = previousMillis;
if (currentMillis - previousMillis <= period){onOffSwitch();}

 
//Lux
double Light (int RawADC0)
double Vout=RawADC0*0.0048828125;
//int lux=500/(10*((5-Vout)/Vout));//use this equation if the LDR is in the upper part of the divider
int lux=(2500/Vout-500)/10;
return lux;
 




//luxAmount = analogRead(LDRpin);
//Serial.println(luxAmount);
Serial.println(int(Light(analogRead(0))));
delay(1000);


if ((grnLedState == HIGH) && (lux >= 250)){digitalWrite(buzzerPin, LOW);} else {digitalWrite(buzzerPin, HIGH);}
if ((grnLedState == HIGH) && (luX == 0)){myServo.write(180);} 







}















void blinkGrnLed(){
    digitalWrite(grnLedPin, LOW);
  delay(500);
    digitalWrite(grnLedPin, HIGH);
  delay(500);
    digitalWrite(grnLedPin, LOW);
  delay(500);
    digitalWrite(grnLedPin, HIGH);
  delay(500);
}










/*
if ((Lux >= luxThreshold) && (grnLedState == HIGH)) {
  digitalWrite(buzzerPin, LOW);} 
if ((Lux <= luxThreshold) && (grnLedState == HIGH)) {
  digitalWrite(buzzerPin, HIGH);
}*/


/*currentMillis = millis(); 
elapsedTime = currentMillis - previousMillis;
//if (elapsedTime < 30000) {digitalWrite(buzzerPin, HIGH);}
//else {digitalWrite(buzzerPin, LOW);}
previousMillis = currentMillis;
}*/






  /*{for (pos = 90; pos <= 180; pos += 1) { // goes from 0 degrees to 90 degrees in steps of 1 degree
    
    myServo.write(pos);              // tell servo to go to position in variable 'pos'
    delay(15);}                    // waits 15ms for the servo to reach the position

 
  for (pos = 180; pos >= 90; pos -= 1) { // goes from 90 degrees to 0 degrees
    
    myServo.write(pos);              // tell servo to go to position in variable 'pos'
    delay(15);}                    // waits 15ms for the servo to reach the position


  for (pos = 0; pos == 0; pos == 0){
    
    myServo.write(90);
    delay(15);
  
    }*/