// #include <ESP8266WiFi.h>
// #include <ESPAsyncWebServer.h>
// #include <time.h>

// ----- USER PINS (uprav si) -----
const int RELAY_PIN = 5;     // GPIO5 = D1
const int BUTTON_PIN = 4;    // GPIO4 = D2
const int BUZZER_PIN = 10;   // GPIO14 = D5

// ----- CONFIG -----
// const char* ssid = "your_ssid";
// const char* pass = "your_password";

// AsyncWebServer server(80);

// ----- TIMERS -----
unsigned long lastBeep = 0;
unsigned long lastButton = 0;
unsigned long startTime = 0;

const unsigned long BEEP_INTERVAL = 1UL * 60UL * 1000UL;     // 5 min
const unsigned long MAX_TIME_NO_BUTTON = 5UL * 60UL * 1000UL; // 25 min
unsigned long allowedTime = MAX_TIME_NO_BUTTON;  // čas, kedy sa vypne relé

// =====================================================================
//                               SETUP
// =====================================================================
void setup() {
  Serial.begin(115200);
  delay(200);

  // Pins
  pinMode(RELAY_PIN, OUTPUT);
  pinMode(BUTTON_PIN, INPUT_PULLUP);
  pinMode(BUZZER_PIN, OUTPUT);

  digitalWrite(RELAY_PIN, HIGH);      // Rele zapnute od startu
  digitalWrite(BUZZER_PIN, LOW);

  // WiFi
  // WiFi.mode(WIFI_STA);
  // WiFi.begin(ssid, pass);

  Serial.print("Connecting WiFi");
  // while (WiFi.status() != WL_CONNECTED) {
  //   delay(300);
  //   Serial.print(".");
  // }
  // Serial.println("\nWiFi connected");
  // Serial.println(WiFi.localIP());

  // NTP
  // configTime(0, 0, "pool.ntp.org", "time.nist.gov");
  Serial.println("Waiting for time...");
  // time_t now = time(nullptr);
  // while (now < 100000) {
  //   delay(200);
  //   Serial.print(".");
  //   now = time(nullptr);
  // }
  Serial.println("\nTime synchronized");

  // AsyncWebServer - skeleton only
  // server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
  //   request->send(200, "text/plain", "ESP8266 alive");
  // });
  // server.begin();

  // Initialize timers
  startTime = millis();
  lastBeep = millis();
  lastButton = millis();
}

// =====================================================================
//                                LOOP
// =====================================================================
void loop() {
  unsigned long now = millis();

  // ----- Bzučiak každých 5 minút -----
  if (now - lastBeep >= BEEP_INTERVAL) {
    lastBeep = now;

    tone(BUZZER_PIN, 2000, 150);    // krátky beep
    Serial.println("Beep!");
  }

  // ----- Tlačidlo -----
  if (digitalRead(BUTTON_PIN) == LOW) {
    lastButton = now;
    allowedTime += 5UL * 60UL * 1000UL;   // +5 minút
    tone(BUZZER_PIN, 1500, 80);
    delay(200); // debounce
    Serial.println("Button pressed, extra 5 minutes added.");
  }

  // ----- Kontrola času bez tlačidla -----
  if (now - startTime >= allowedTime) {
    Serial.println("Time expired. Turning relay OFF.");
    digitalWrite(RELAY_PIN, LOW);
  }
}