#include <WiFi.h>
#include "ThingSpeak.h"
#include "DHT.h"

// ====== Sensor Configuration ======
#define DHTPIN 4          // DHT22 signal pin
#define DHTTYPE DHT22
#define MQ135_PIN 34      // Air quality sensor (Analog)
#define LDR_PIN 35        // Light sensor (Analog)
#define PIR_PIN 25        // Motion sensor (Digital)

DHT dht(DHTPIN, DHTTYPE);

// ====== WiFi Configuration ======
const char* WIFI_NAME = "Wokwi-GUEST";
const char* WIFI_PASSWORD = "";

// ====== ThingSpeak Configuration ======
const long myChannelNumber = Channel ID;  // Your ThingSpeak channel ID
const char* myWriteAPIKey = "Write API Key";
const char* server = "api.thingspeak.com";

WiFiClient client;

void setup() {
  Serial.begin(115200);

  // Initialize sensors
  dht.begin();
  pinMode(PIR_PIN, INPUT);

  // Connect to WiFi
  WiFi.begin(WIFI_NAME, WIFI_PASSWORD);
  Serial.print("Connecting to WiFi...");
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.print(".");
  }
  Serial.println("\n✅ WiFi connected!");
  Serial.println("Local IP: " + String(WiFi.localIP()));

  // Initialize ThingSpeak
  ThingSpeak.begin(client);
}

void loop() {
  // ====== Read Sensor Values ======
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();
  int airQuality = analogRead(MQ135_PIN);
  int lightLevel = analogRead(LDR_PIN);
  int motion = digitalRead(PIR_PIN);

  // ====== Print to Serial Monitor ======
  Serial.println("======================================");
  Serial.print("🌡  Temperature: "); Serial.print(temperature); Serial.println(" °C");
  Serial.print("💧 Humidity: "); Serial.print(humidity); Serial.println(" %");
  Serial.print("🌫  Air Quality: "); Serial.println(airQuality);
  Serial.print("💡 Light Level: "); Serial.println(lightLevel);
  Serial.print("🚶 Motion Detected: "); Serial.println(motion == HIGH ? "YES" : "NO");
  Serial.println("======================================");

  // ====== Send data to ThingSpeak ======
  ThingSpeak.setField(1, temperature);
  ThingSpeak.setField(2, humidity);
  ThingSpeak.setField(3, airQuality);
  ThingSpeak.setField(4, lightLevel);
  ThingSpeak.setField(5, motion);

  int response = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);

  if (response == 200) {
    Serial.println("✅ Data uploaded successfully to ThingSpeak!");
  } else {
    Serial.println("❌ Upload failed. HTTP error code: " + String(response));
  }

  delay(2000); // Wait 2 seconds before next upload
}