#include "DHT.h"

// led 1
int led1 = 6;

// led two ply dynamic delay control
int led2 = 7;
int rapidDelay = 200;

// led three with brightness check and fadeamount
int led3 = 8;
int brightness = 0; 
int fadeAmount = 5; 
int shortDelay = 30;

//Temperature sensor 
#define DHTPIN 4 
#define DHTTYPE DHT22  
DHT tempSensor(DHTPIN, DHTTYPE);

void setup() {
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);

  Serial.begin(9600);
  tempSensor.begin();

}

void loop() {

  //led2Controle();
 // led3Controle();

 if (checkTemperature() > 45){
  led1Controle();
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
 };
 if ((checkTemperature() < 45) && (checkTemperature() > 25)){
  led2Controle();
    digitalWrite(led1, LOW);
    digitalWrite(led3, LOW);
 };
  if (checkTemperature() < 25) {
  led3Controle();
  digitalWrite(led1, LOW);
  digitalWrite(led2, LOW);
 };
}

void led1Controle(){
  digitalWrite(led1, HIGH);
}

void led2Controle(){
  digitalWrite(led2, HIGH);
  delay(rapidDelay);
  digitalWrite(led2, LOW);
  delay(rapidDelay);
}

void led3Controle(){
  //fade in 
  for (brightness = 0; brightness <= 255; brightness += fadeAmount) {
    analogWrite(led3, brightness); // Set the LED brightness
    delay(shortDelay); 
  }

  //fade out 
  for (brightness = 255; brightness >= 0; brightness -= fadeAmount) {
    analogWrite(led3, brightness); 
    delay(shortDelay); 
  }
}

int checkTemperature(){
  float temperature = tempSensor.readTemperature(); //default = false = is Celsius 

    // Check if any reads failed and exit early (to try again).
  if (isnan(temperature)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  Serial.print(F("Temperature: "));
  Serial.print(temperature);
  Serial.print(F("°C "));
  delay(rapidDelay);

  return temperature; 
}