aaa#define BLYNK_TEMPLATE_ID   "TMPL3fXDSrrWP"
#define BLYNK_TEMPLATE_NAME "Smart Plug Basic v1"
#define BLYNK_AUTH_TOKEN    "bsbb2Hz4nmZqDAeCtlNOlJSsRaJrZzpn"

#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#include <TimeLib.h>
#include <WidgetRTC.h>

char ssid[] = "Wokwi-GUEST";
char pass[] = "";

#define RELAY_PIN   3   // D1
#define LED_PIN     8   // D8
#define BUTTON_PIN  4   // D2 -> GND

BlynkTimer timer;

bool relayState = false;

// countdown from V2 menu
bool countdownActive = false;
unsigned long countdownEndMillis = 0;

bool lastButtonState = HIGH;

void setRelay(bool on) {
  relayState = on;
  digitalWrite(RELAY_PIN, on ? HIGH : LOW);
  digitalWrite(LED_PIN,   on ? HIGH : LOW);
  Blynk.virtualWrite(V1, on ? 1 : 0);  // sync app
}

// V1: ON/OFF switch
BLYNK_WRITE(V1) {
  int value = param.asInt();
  setRelay(value == 1);
  if (value == 0) countdownActive = false;
}

// V2: Menu: 1=No timer, 2=+30, 3=+60, 4=+90
BLYNK_WRITE(V2) {
  int sel = param.asInt();
  int minutes = 0;

  if (sel == 2)      minutes = 30;
  else if (sel == 3) minutes = 60;
  else if (sel == 4) minutes = 90;
  else               minutes = 0;

  if (minutes > 0) {
    setRelay(true);
    countdownActive = true;
    countdownEndMillis = millis() + (unsigned long)minutes * 60UL * 1000UL;
    Serial.print("Countdown started for ");
    Serial.print(minutes);
    Serial.println(" min");
  } else {
    countdownActive = false;
    Serial.println("Countdown cancelled");
  }
}

void checkCountdown() {
  if (countdownActive && millis() > countdownEndMillis) {
    countdownActive = false;
    setRelay(false);
    Serial.println("Countdown finished -> OFF");
  }
}

// physical button on D2
void checkButton() {
  bool current = digitalRead(BUTTON_PIN);

  if (current == LOW && lastButtonState == HIGH) {
    delay(30);
    if (digitalRead(BUTTON_PIN) == LOW) {
      setRelay(!relayState);
      Serial.print("Button pressed -> ");
      Serial.println(relayState ? "ON" : "OFF");
      countdownActive = false;  // cancel timer on manual press
    }
  }

  lastButtonState = current;
}

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

  pinMode(RELAY_PIN, OUTPUT);
  pinMode(LED_PIN, OUTPUT);
  pinMode(BUTTON_PIN, INPUT_PULLUP);

  setRelay(false);

  // ---- Manual WiFi connect with timeout ----
  Serial.print("Connecting to WiFi ");
  Serial.println(ssid);
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, pass);

  unsigned long start = millis();
  while (WiFi.status() != WL_CONNECTED && millis() - start < 15000) {
    delay(500);
    Serial.print(".");
  }

  if (WiFi.status() == WL_CONNECTED) {
    Serial.println("\nWiFi connected");
    Serial.print("IP: ");
    Serial.println(WiFi.localIP());
  } else {
    Serial.println("\nWiFi FAILED, continuing offline (button still works)");
  }

  // ---- Blynk config (non-blocking) ----
  Blynk.config(BLYNK_AUTH_TOKEN);
  if (WiFi.status() == WL_CONNECTED) {
    if (Blynk.connect(5000)) {
      Serial.println("Blynk connected");
    } else {
      Serial.println("Blynk NOT connected (timeout)");
    }
  }

  // timers
  timer.setInterval(1000L, checkCountdown);
  timer.setInterval(50L, checkButton);
}

void loop() {
  if (WiFi.status() == WL_CONNECTED) {
    Blynk.run();   // only if WiFi OK
  }
  timer.run();     // always run (button + countdown)
}