/****************************************************
 * ESP32 + Blynk (dummy data, tanpa sensor)
 * - V0 : Temperature (°C)
 * - V1 : Humidity (%RH)
 * - V2 : Pump (0 = OFF, 1 = ON)
 * - V3 : Estimated Water Usage (liter, kumulatif)
 ****************************************************/

#define BLYNK_TEMPLATE_ID   "YOUR_TEMPLATE_ID"
#define BLYNK_TEMPLATE_NAME "Water Usage Demo"
#define BLYNK_AUTH_TOKEN    "YOUR_BLYNK_AUTH_TOKEN"

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

char auth[] = BLYNK_AUTH_TOKEN;

// Untuk Wokwi biasanya:
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

// Mapping virtual pin
#define VPIN_TEMP   V0
#define VPIN_HUM    V1
#define VPIN_PUMP   V2
#define VPIN_WATER  V3

BlynkTimer timer;

// Variabel internal
float totalLiters = 0.0;
bool pumpOn = false;
unsigned long lastMs;

// Fungsi ini dipanggil periodik untuk kirim data ke Blynk
void sendDummyData() {
  unsigned long now = millis();

  // Konversi waktu ke menit dan detik relatif
  float minutesSinceStart = now / 60000.0;  // menit sejak start
  int   secondsSinceStart = now / 1000;     // detik sejak start

  // 1. Dummy TEMPERATURE (sekitar 27.4°C)
  //    27 + (osilasi kecil sinus)
  float temp = 27.4 + 1.0 * sin(minutesSinceStart * 3.14159 / 15.0);

  // 2. Dummy HUMIDITY (sekitar 58%)
  float hum = 58.0 + 5.0 * sin(minutesSinceStart * 3.14159 / 20.0 + 1.0);

  // 3. Status PUMP (nyala 20 detik, mati 40 detik, berulang)
  int period = 60; // 60 detik
  int s = secondsSinceStart % period;
  pumpOn = (s < 20);  // 0–19 detik ON, 20–59 detik OFF

  // 4. Dummy ESTIMATED WATER USAGE
  //    Asumsi: debit pompa = 2.0 liter/menit
  //    Jika pompa ON, totalLiters bertambah sesuai dt.
  float dtMin = (now - lastMs) / 60000.0; // selisih waktu (menit)
  if (pumpOn) {
    float flowRate = 2.0;       // liter per menit
    totalLiters += flowRate * dtMin;
  }
  lastMs = now;

  // Kirim ke Blynk
  Blynk.virtualWrite(VPIN_TEMP,  temp);
  Blynk.virtualWrite(VPIN_HUM,   hum);
  Blynk.virtualWrite(VPIN_PUMP,  pumpOn ? 1 : 0);
  Blynk.virtualWrite(VPIN_WATER, totalLiters);

  // Debug di Serial
  Serial.print("T=");
  Serial.print(temp);
  Serial.print("C  H=");
  Serial.print(hum);
  Serial.print("%  Pump=");
  Serial.print(pumpOn ? "ON" : "OFF");
  Serial.print("  Water=");
  Serial.print(totalLiters);
  Serial.println(" L");
}

void setup() {
  Serial.begin(115200);
  delay(100);

  Blynk.begin(auth, ssid, pass);

  lastMs = millis();
  // Kirim data ke Blynk tiap 2 detik
  timer.setInterval(2000L, sendDummyData);
}

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