// C++ code
//


// coded using tinkercad. CODE does not reflect the circuit


//////////////// read ^^^^^^^^^^^^^^^^^^^^^^^^^^/////////////////






int RLed = 13;
int BLed = 12;
int GLed = 11;
int YLed = 10;
int WLed = 9;
int LDR_Pin = A0;
int Moisture_Pin = A1;
int NTC_Pin = A2;

void setup(){
  Serial.begin(9600);
  pinMode(RLed, OUTPUT);
  pinMode(BLed, OUTPUT);
  pinMode(GLed, OUTPUT);
  pinMode(YLed, OUTPUT);
  pinMode(WLed, OUTPUT);
  pinMode(LDR_Pin, INPUT);
  pinMode(Moisture_Pin, INPUT);
  pinMode(NTC_Pin, INPUT);
}

void temperature(){
  // https://docs.wokwi.com/parts/wokwi-ntc-temperature-sensor 
  // below converts from analogue to celsius.
  
  int analogTemp = analogRead(NTC_Pin);
  int tempInC = map((analogTemp-20)*3.04, 0, 1023, -40, 125);
  //maps analog temperature reading from its scale 
  //of 0 to 1023 bits to the temperature scale of -40 to 125 celsius.
  
  if (tempInC<5){
    digitalWrite(BLed, HIGH);
    Serial.println("It is Cold. Blue LED is on");
  }else{
    digitalWrite(BLed, LOW);
  }
  Serial.print("Temperature: ");
  Serial.print(tempInC);
  Serial.println(" C");
  delay(1000);
}

void timeOfDay(){
  // https://wokwi.com/projects/347552240227058259

  int analogLux = analogRead(LDR_Pin);
  float lux = map(analogLux, 0, 1023, 0, 10000);

  Serial.print("Light Level: ");
  Serial.print(lux);
  Serial.println(" lux");
  delay(1000);

  if (lux<200) { // night
    Serial.println("It is night time. Red LED is on.");
    digitalWrite(RLed, HIGH);
    digitalWrite(GLed, LOW);
    digitalWrite(YLed, LOW);
    delay(500);
  } else if (lux>=200 && lux<3000){ // day
    Serial.println("It is day time. Green LED is on.");
    digitalWrite(GLed, HIGH);
    digitalWrite(RLed, LOW);
    digitalWrite(YLed, LOW);
    delay(500);
  } else if (lux>=3000){ // day and too bright
  Serial.println("It is day time but it is too bright. Green and Yellow LED are on.");
    digitalWrite(YLed, HIGH); 
    digitalWrite(GLed, HIGH);
    delay(500);
  }
}

void nightDayTemperature(){

  int analogLux = analogRead(LDR_Pin);
  float lux = map(analogLux, 0, 1023, 0, 10000);

  int analogTemp = analogRead(NTC_Pin);
  int tempInC = map((analogTemp-20)*3.04, 0, 1023, -40, 125);

  if (lux<200 && tempInC<5){ // night and temp below 5℃
    digitalWrite(BLed, HIGH);
    digitalWrite(RLed, HIGH);
    Serial.println("It is Cold. Blue LED is on");
  } else if ((lux>=200) && tempInC<5){ // day and temp below 5℃
    digitalWrite(BLed, HIGH);
    digitalWrite(GLed, HIGH);
    Serial.println("It is Cold. Blue LED is on");
  }
}

void waterSensor(){
  int analogMoist = analogRead(Moisture_Pin);
  int moistLevel = map(analogMoist + 147 , 147, 1023, 0, 100);
  Serial.print("moisture level: ");
  Serial.print(moistLevel);
  Serial.println("%");
  
  if (moistLevel<80){
    digitalWrite(WLed, LOW);
    delay(200);
    digitalWrite(WLed,HIGH);
    delay(200);
  }else{
    digitalWrite(WLed, HIGH);
}
}

void loop(){
  waterSensor();
  temperature();
  timeOfDay();
  nightDayTemperature();
}