#include <Adafruit_Sensor.h>
#include <DHT.h>
#include <Wire.h>
#include <Adafruit_PWMServoDriver.h>

// Define pins
#define DHTPIN 2
#define MOTIONPIN A0
#define PHOTOCELLPIN 3
#define LEDPIN 4

// Define DHT sensor type
#define DHTTYPE DHT22

// Define servo driver
Adafruit_PWMServoDriver pwm = Adafruit_PWMServoDriver();

// Define variables
int motionState = 0;
int previousMotionState = 0;
int lightValue = 0;
int ledValue = 0;
int threshold = 50;
int ledBrightness = 0;
float temperature, humidity;
int coolingState = 0;
int heatingState = 0;
int coolingPin = 0;
int heatingPin = 1;

// Initialize sensors
DHT dht(DHTPIN, DHTTYPE);

////////////////////////////////////////  Warning error in this part of code 

void setup() {
  // Start serial communication
  Serial.begin(9600);

  // Initialize DHT sensor
  dht.begin();

  // Initialize servo driver
  pwm.begin();
  pwm.setPWMFreq(60);

  // Set LED pin as output
  pinMode(LEDPIN, OUTPUT);

/************************* cooling and heating pin serve as input to system then control temperature of climatisor  ************************/
///////////////////////////////////////// warning fiw erreur --> input

  // Set cooling and heating pins as output
  pinMode(coolingPin, OUTPUT);
  pinMode(heatingPin, OUTPUT);
}



void loop() {

 ///////////////////////////////// where is the function readTemperature() - readHumidity() 

  // Read temperature and humidity values 
  temperature = dht.readTemperature();
  humidity = dht.readHumidity();

  // Read motion sensor value
  motionState = analogRead(MOTIONPIN);

  // Read photoresistor value
  lightValue = analogRead(PHOTOCELLPIN);

  // Calculate LED brightness based on photoresistor value
  ledBrightness = map(lightValue, 0, 1023, 0, 255);

  // Turn on LED if motion is detected and it's dark
  if (motionState > threshold && lightValue < 100) {
    digitalWrite(LEDPIN, HIGH);
    ledValue = 1;
  }
  else {
    digitalWrite(LEDPIN, LOW);
    ledValue = 0;
  }

  // Control cooling system based on temperature value
  if (temperature > 30 && coolingState == 0) {
    digitalWrite(coolingPin, HIGH);  // Turn on cooling
    coolingState = 1;
  }
  else if (temperature < 25 && coolingState == 1) {
    digitalWrite(coolingPin, LOW);   // Turn off cooling
    coolingState = 0;
  }

  // Control heating system based on temperature and humidity values
  if (temperature < 20 || humidity < 40) {
    digitalWrite(heatingPin, HIGH);  // Turn on heating
    heatingState = 1;
  }
  else if (temperature > 25 && heatingState == 1) {
    digitalWrite(heatingPin, LOW);   // Turn off heating
    heatingState = 0;
  }

   // Print sensor values to serial monitor
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.print("°C, Humidity: ");
  Serial.print(humidity);
  Serial.print("%, Light: ");
  Serial.print(lightValue);
  Serial.print(", Motion: ");
  Serial.print(motionState);
  Serial.print(", LED: ");
  Serial.print(ledValue);
  Serial.print(", Heating: ");
  Serial.println(pwm.getPWM(0));

  // Delay to prevent flooding the serial monitor
  delay(1000);
}