/*
Bismillah
Nama : M. Alamsyah
ver : 1.0.0
*/

#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <Encoder.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64

#define OLED_RESET -1 
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

const int potPin = A0;
const float maxFlow = 30.0;    // Set maximum flow rate to 30 L/min
const float maxVolume = 10000.0;  // Set maximum total volume to 10000 L
const int updateInterval = 500;  

unsigned long previousMillis = 0;
float totalVolume = 0.0;

Encoder encoder(2, 3);

void setup() {
  Serial.begin(9600);

  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { 
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); 
  }

  display.display();  
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);

  display.setCursor(0, 0);
  display.println("Flowmeter Simulation:");
  display.display();  
}

void loop() {
  unsigned long currentMillis = millis();

  if (currentMillis - previousMillis >= updateInterval) {
    previousMillis = currentMillis;

    int potValue = analogRead(potPin);
    
    // Map potValue to the range 0 to 30
    float flow = map(potValue, 0, 1023, 0, maxFlow);

    float flowRatePerSecond = flow / 60.0;

    totalVolume += flowRatePerSecond * (updateInterval / 1000.0);

    // Limit total volume to the maximum value
    totalVolume = constrain(totalVolume, 0, maxVolume);

    display.clearDisplay();  

    display.setCursor(0, 16);  
    display.print("Flow Rate: ");
    display.print(flowRatePerSecond, 2);  // Display flow rate with 2 decimal places
    display.print(" mL/s");

    display.setCursor(0, 32); 
    display.print("Total Volume: ");
    display.print(totalVolume, 2);  // Display total volume with 2 decimal places
    display.print(" mL");

    display.display();
  }

  long encoderPosition = encoder.read();

  if (encoderPosition > 0) {
    // Perubahan posisi ke kanan
  } else if (encoderPosition < 0) {
    // Perubahan posisi ke kiri
  }

  delay(50); // Tambahkan delay untuk mengurangi debounce
}