#include <WiFi.h>
#include <SinricPro.h>
#include <SinricProSwitch.h>
#include <DHT.h>

// WiFi Credentials
const char* ssid = "Wokwi-GUEST";  
const char* password = "";  // Replace with your actual WiFi password

// Sinric Pro Credentials
const char* appKey = "daf7cd4d-56f5-4752-b3c4-6e28e29c7d0e";  // Replace with your Sinric Pro App Key
const char* secretKey = "86e539c1-52c7-4ae1-a76f-d4822c7c86dd-dff23396-2257-4165-af33-1093e762b463";  // Replace with your Sinric Pro Secret Key
const char* serverURL = "ws.sinric.pro"; // Sinric Pro WebSocket Server
const char* lightID = "67bae70977d346f8f46d609f";  // Replace with your Light Device ID
const char* fanID = "67bae814ff1f4eb6e7604ffe";  // Replace with your Fan Device ID

// GPIO Pins
#define LIGHT_PIN 2  
#define FAN_PIN 4  
#define PIR_PIN 13  
#define DHT_PIN 15  
#define DHTTYPE DHT22  // Using DHT22 sensor

DHT dht(DHT_PIN, DHTTYPE);
bool lightState = false;
bool fanState = false;
unsigned long lastMotionTime = 0;
const unsigned long lightTimeout = 5000;  // 5 seconds timeout for lights
bool motionDetectedPrev = false;

// Callback function for Alexa/Google Assistant via Sinric Pro
bool onPowerState(const String &deviceId, bool &state) {
    if (deviceId == lightID) {
        lightState = state;
        digitalWrite(LIGHT_PIN, state ? HIGH : LOW);
        Serial.println(state ? "Light ON" : "Light OFF");
    } else if (deviceId == fanID) {
        fanState = state;
        digitalWrite(FAN_PIN, state ? HIGH : LOW);
        Serial.println(state ? "Fan ON" : "Fan OFF");
    }
    return true;
}

void setup() {
    Serial.begin(115200);
    pinMode(LIGHT_PIN, OUTPUT);
    pinMode(FAN_PIN, OUTPUT);
    pinMode(PIR_PIN, INPUT);
    
    WiFi.begin(ssid, password);
    
    unsigned long startAttemptTime = millis();
    while (WiFi.status() != WL_CONNECTED && millis() - startAttemptTime < 20000) {  // 20 sec timeout
        delay(1000);
        Serial.println("Connecting to WiFi...");
    }
    
    if (WiFi.status() == WL_CONNECTED) {
        Serial.println("Connected to WiFi!");
    } else {
        Serial.println("WiFi Connection Failed!");
    }

    // Initialize Sinric Pro
    SinricProSwitch &myLight = SinricPro[lightID]; // Initialize Light Device
    SinricProSwitch &myFan = SinricPro[fanID];     // Initialize Fan Device

    myLight.onPowerState(onPowerState);
    myFan.onPowerState(onPowerState);

    SinricPro.begin(appKey, secretKey, serverURL);

    dht.begin();
}

void loop() {
    SinricPro.handle();

    // Read PIR Sensor for motion detection
    bool motionDetected = digitalRead(PIR_PIN) == HIGH;
    
    if (motionDetected && !motionDetectedPrev) {
        Serial.println("Motion Detected! Turning on Light.");
        digitalWrite(LIGHT_PIN, HIGH);
        lightState = true;
        lastMotionTime = millis();
    }

    motionDetectedPrev = motionDetected;

    // Turn off light if motion stopped after timeout
    if (lightState && !motionDetected && millis() - lastMotionTime > lightTimeout) {
        digitalWrite(LIGHT_PIN, LOW);
        lightState = false;
        Serial.println("Light turned off due to inactivity.");
    }

    // Read Temperature and Humidity
    float temperature = dht.readTemperature();
    float humidity = dht.readHumidity();
    
    if (!isnan(temperature)) {
        Serial.print("Temperature: "); Serial.print(temperature); Serial.println(" °C");
    } else {
        Serial.println("Failed to read temperature!");
    }
    
    if (!isnan(humidity)) {
        Serial.print("Humidity: "); Serial.print(humidity); Serial.println(" %");
    } else {
        Serial.println("Failed to read humidity!");
    }

    // Automatic Fan Control with hysteresis
    if (temperature > 30 && !fanState) {  // Turn on at 30°C
        digitalWrite(FAN_PIN, HIGH);
        fanState = true;
        Serial.println("High Temp! Turning Fan ON");
    } else if (temperature < 29 && fanState) {  // Turn off at 29°C
        digitalWrite(FAN_PIN, LOW);
        fanState = false;
        Serial.println("Temperature Normal. Turning Fan OFF");
    }

    delay(2000);
}