#define BLYNK_TEMPLATE_ID "TMPL6kp6d_svR"
#define BLYNK_TEMPLATE_NAME "Test2"
#define BLYNK_AUTH_TOKEN "FmWQiEgPbmjbU_QMVEquvZQQik-DfTCw"

#define WIFI_SSID "newan"
#define WIFI_PASS "newaniscooking88"

#include <BlynkSimpleEsp32.h>
// ---------------- CONFIG ----------------
#define RELAY1 5
#define MOTION_PIN 14
#define TEMP_VPIN V2
#define BUTTON_VPIN V1
#define AUTO_MODE_BTN V3
#define NOTIFY_VPIN V4        // Notification virtual pin
#define NOTIFY_MIN_INTERVAL 5 * 60 * 1000UL

bool autoMode = true;
bool relayState = false;
float currentTemp = 22.0;
unsigned long lastMotionNotifyAt = 0;
unsigned long lastMotionAt = 0;

// --- AUTO TEMP SETTINGS ---
const float TEMP_TARGET = 22.0;     
const float TEMP_HYSTERESIS = 0.5;  

// --- MOTION SETTINGS ---
const unsigned long MOTION_TIMEOUT = 30000; // 30 sec

// ---------------- UTILS ----------------
void setRelay(bool on) {
  digitalWrite(RELAY1, on ? LOW : HIGH);
  relayState = on;
  Blynk.virtualWrite(V10, on ? 1 : 0);
}

// ---------------- BLYNK HANDLERS ----------------
BLYNK_WRITE(BUTTON_VPIN) {
  int value = param.asInt();
  setRelay(value);    
  autoMode = false;   // manual override
}

BLYNK_WRITE(AUTO_MODE_BTN) {
  int value = param.asInt();
  autoMode = (value == 1); // re-enable auto
}

BLYNK_WRITE(TEMP_VPIN) {
  currentTemp = param.asFloat();
}

// ---------------- AUTO CONTROL ----------------
void checkAuto() {
  if (!autoMode) return; // skip auto if manual

  // Motion-based control
  if (digitalRead(MOTION_PIN) == HIGH) {
    lastMotionAt = millis();
    if (!relayState) setRelay(true);

    if (millis() - lastMotionNotifyAt > NOTIFY_MIN_INTERVAL) {
      Blynk.virtualWrite(NOTIFY_VPIN, "Motion detected!"); // send notification via V4
      lastMotionNotifyAt = millis();
    }
  }

  if (relayState && millis() - lastMotionAt > MOTION_TIMEOUT) {
    setRelay(false);
  }

  // Temperature-based control
  if (currentTemp < (TEMP_TARGET - TEMP_HYSTERESIS)) {
    if (!relayState) setRelay(true);
  } else if (currentTemp > (TEMP_TARGET + TEMP_HYSTERESIS)) {
    if (relayState) setRelay(false);
  }
}

// ---------------- SETUP & LOOP ----------------
void setup() {
  pinMode(RELAY1, OUTPUT);
  pinMode(MOTION_PIN, INPUT);
  setRelay(false);

  Blynk.begin(BLYNK_AUTH_TOKEN, WIFI_SSID, WIFI_PASS);
}

void loop() {
  Blynk.run();
  checkAuto();
  delay(500);
}