#define BLYNK_TEMPLATE_ID "TMPL6v7OhwI7u"
#define BLYNK_TEMPLATE_NAME "IOT Monitoring System"
#define BLYNK_AUTH_TOKEN "MX1NJa6zJYLLRhux0CXYizDzH5VcEO0M"
#define BLYNK_PRINT Serial

#include <WiFi.h>
#include <WiFiClientSecure.h>
#include <BlynkSimpleEsp32_SSL.h>
#include <DHT.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define DHTPIN 19
#define DHTTYPE DHT22

const int ledGreen = 26;
const int ledYellow = 27;
const int ledRed = 14;
const int buzzer = 18;

bool buzzerEnabled = true;
bool buzzerState = false;

DHT dht(DHTPIN, DHTTYPE);
Adafruit_SSD1306 display(128, 64, &Wire, -1);
BlynkTimer timer;

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

WiFiClientSecure client;

BLYNK_WRITE(V4) {
  buzzerEnabled = param.asInt();
  if (!buzzerEnabled) {
    digitalWrite(buzzer, LOW);
    buzzerState = false;
  }
}

void sendSensorData() {

  WiFi.begin(ssid, pass);
  Serial.print("Connecting to WiFi");
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.print(".");
  }
  Serial.println("Connected to WiFi");

  Blynk.begin(auth, ssid, pass, "blynk.cloud", 443);

  float temp = dht.readTemperature();
  float hum = dht.readHumidity();

  Serial.print("Temperature: "); Serial.print(temp); Serial.print(" C, ");
  Serial.print("Humidity: "); Serial.print(hum); Serial.println(" %");

  String statusText = "";

  bool isAman = (temp >= 20 && temp <= 28) && (hum >= 45 && hum <= 60);
  bool isWaspada = (temp >= 29 && temp <= 31) && (hum >= 61 && hum <= 65);
  bool isKritis = !isAman && !isWaspada;

  if (isAman) {
    digitalWrite(ledGreen, HIGH);
    digitalWrite(ledYellow, LOW);
    digitalWrite(ledRed, LOW);
    digitalWrite(buzzer, LOW);
    statusText = "AMAN";
  } else if (isWaspada) {
    digitalWrite(ledGreen, LOW);
    digitalWrite(ledYellow, HIGH);
    digitalWrite(ledRed, LOW);
    statusText = "WASPADA";
    Blynk.logEvent("warning", "Kondisi waspada!cek ruang penyimpanan!");
  } else if (isKritis) {
    digitalWrite(ledGreen, LOW);
    digitalWrite(ledYellow, LOW);
    digitalWrite(ledRed, HIGH);
    statusText = "KRITIS";
    if (buzzerEnabled) {
      digitalWrite(buzzer, HIGH);
    }
    Blynk.logEvent("danger", "Suhu atau kelembapan di luar batas aman kritis bro!");
  }
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0, 0);
  display.println("Monitoring Obat");
  display.setCursor(0, 15);
  display.print("Temp: "); display.print(temp); display.println(" C");
  display.print("Hum : "); display.print(hum); display.println(" %");
  display.print("Status: "); display.println(statusText);
  display.display();
  Blynk.virtualWrite(V3, temp);
  Blynk.virtualWrite(V1, hum);
  Blynk.virtualWrite(V2, statusText);

  configTime(0, 0, "pool.ntp.org", "time.nist.gov");
  Serial.println("Waiting for time sync...");
  while (time(nullptr) < 100000) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("Time synchronized!");
}

void toggleBuzzer() {
  if (buzzerEnabled && digitalRead(ledYellow) == HIGH) {
    buzzerState = !buzzerState;
    digitalWrite(buzzer, buzzerState ? HIGH : LOW);
  } else if (!buzzerEnabled || digitalRead(ledYellow) == LOW) {
    digitalWrite(buzzer, LOW);
    buzzerState = false;
  }
}

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

  pinMode(ledGreen, OUTPUT);
  pinMode(ledYellow, OUTPUT);
  pinMode(ledRed, OUTPUT);
  pinMode(buzzer, OUTPUT);

  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println("OLED gagal!");
    while (true);
  }

  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0, 0);
  display.println("Monitoring Obat");
  display.display();

  client.setInsecure();
  timer.setInterval(2000L, sendSensorData);
  timer.setInterval(500L, toggleBuzzer);
}

void loop() {
  Blynk.run();
  sendSensorData();
  toggleBuzzer();
  timer.run();
}