#define BLYNK_TEMPLATE_ID "TMPL6FCNi7q7s"
#define BLYNK_TEMPLATE_NAME "PERINGATAN DINI HUJAN IOT DAN SISTEM CERDAS"
#define BLYNK_AUTH_TOKEN "Ne1vnUgOBh1_PG0LQIh4u24Zwj1ZerVg"

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

// Blynk auth token
char auth[] = "Ne1vnUgOBh1_PG0LQIh4u24Zwj1ZerVg";
// WiFi credentials
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

// Define ultrasonic sensor pins
#define TRIG_PIN 2
#define ECHO_PIN 15

Ultrasonic ultrasonic(TRIG_PIN, ECHO_PIN);

int potPin = 34; // Potentiometer pin
float waterLevel = 0.0; // Water level variable
int rainIntensity = 0; // Rain intensity variable

BlynkTimer timer;

void setup() {
  // Debug console
  Serial.begin(115200);

  // Blynk connection
  Blynk.begin(auth, ssid, pass);

  // Timer to call sensor data and logic function
  timer.setInterval(2000L, readSensorsAndUpdateLogic);
}

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

void readSensorsAndUpdateLogic() {
  // Read water level from ultrasonic sensor
  float distance = ultrasonic.read();
  waterLevel = 15.0 - (distance / 100.0); // Assuming the river depth is 15 meters

  // Read rain intensity from potentiometer
  rainIntensity = analogRead(potPin);
  rainIntensity = map(rainIntensity, 0, 4095, 0, 100); // Convert to percentage

  // Simple fuzzy logic evaluation
  float floodRisk = calculateFloodRisk(waterLevel, rainIntensity);

  // Determine if there is a flood warning
  bool floodWarning = floodRisk > 50.0; // Set threshold for flood warning

  if (floodWarning) {
    Blynk.logEvent("warning", "Potensi Banjir Terdeteksi!");
  }

  // Send data to Blynk
  Blynk.virtualWrite(V1, waterLevel);
  Blynk.virtualWrite(V2, rainIntensity);
  Blynk.virtualWrite(V3, floodRisk);

  // Print data to Serial Monitor
  Serial.print("Water Level: ");
  Serial.print(waterLevel);
  Serial.print(" meters, Rain Intensity: ");
  Serial.print(rainIntensity);
  Serial.print("%, Flood Risk: ");
  Serial.println(floodRisk);
}

float calculateFloodRisk(float waterLevel, int rainIntensity) {
  float floodRisk = 0.0;

  if (waterLevel < 5) {
    if (rainIntensity < 20) {
      floodRisk = 10.0; // Low risk
    } else if (rainIntensity < 60) {
      floodRisk = 30.0; // Medium risk
    } else {
      floodRisk = 50.0; // High risk
    }
  } else if (waterLevel < 10) {
    if (rainIntensity < 20) {
      floodRisk = 30.0; // Medium risk
    } else if (rainIntensity < 60) {
      floodRisk = 50.0; // High risk
    } else {
      floodRisk = 70.0; // Very high risk
    }
  } else {
    if (rainIntensity < 20) {
      floodRisk = 50.0; // High risk
    } else if (rainIntensity < 60) {
      floodRisk = 70.0; // Very high risk
    } else {
      floodRisk = 90.0; // Extreme risk
    }
  }

  return floodRisk;
}