// Rotary Encoder Inputs
#define CLK 2
#define DT 3
#define SW 4

/*
#include <Wire.h>   //ของจริง
#include <LiquidCrystal_I2C.h> //ของจริง
LiquidCrystal_I2C lcd(0x27, 16, 2); //ของจริง

*/
#include <LiquidCrystal_I2C.h> //ของ wokwi
#define I2C_ADDR    0x27  //ของ wokwi
#define LCD_COLUMNS 16 //ของ wokwi
#define LCD_LINES   2 //ของ wokwi
LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES); //ของ wokwi

int counter = 0;
int currentStateCLK;
int lastStateCLK;
String currentDir ="";
unsigned long lastButtonPress = 0;

void setup() {
  //lcd.begin();//ของจริง
  lcd.init();//wokwi
  // Print a message to the LCD.
  lcd.setCursor(1,0);
  lcd.print("LOADING");
  
  for(int i = 0;i <=16;i++)
 
  {
    
    lcd.setCursor(i,1);
    lcd.write(255);
    lcd.setCursor(9,0);
    lcd.print(5.88*(i+1));
    lcd.setCursor(14,0);
    lcd.print("% ");
    delay(200);
  }
  lcd.clear(); 


	// Set encoder pins as inputs
	pinMode(CLK,INPUT);
	pinMode(DT,INPUT);
	pinMode(SW, INPUT_PULLUP);

   Serial.begin(9600);
  Serial.println("Welcome to the Serial Monitor!");
  Serial.println("---------------------------------");

	// Read the initial state of CLK
	lastStateCLK = digitalRead(CLK);
}

void loop() {
        
	// Read the current state of CLK
	currentStateCLK = digitalRead(CLK);

	// If last and current state of CLK are different, then pulse occurred
	// React to only 1 state change to avoid double count
	if (currentStateCLK != lastStateCLK  && currentStateCLK == 1){

		// If the DT state is different than the CLK state then
		// the encoder is rotating CCW so decrement
		if (digitalRead(DT) != currentStateCLK) {
			counter --;
			currentDir ="CCW";
		} else {
			// Encoder is rotating CW so increment
			counter ++;
			currentDir ="CW";
		}

		Serial.print("Direction: ");
		Serial.print(currentDir);
		Serial.print(" | Counter: ");
		Serial.println(counter);

    lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Direction: ");
  lcd.setCursor(10,0);
  lcd.print(currentDir);
  lcd.setCursor(0,1);
  lcd.print("| Counter: ");
  lcd.setCursor(10,1);
  lcd.print(counter);
	}

	// Remember last CLK state
	lastStateCLK = currentStateCLK;

	// Read the button state
	int btnState = digitalRead(SW);

	//If we detect LOW signal, button is pressed
	if (btnState == LOW) {
		//if 50ms have passed since last LOW pulse, it means that the
		//button has been pressed, released and pressed again
		if (millis() - lastButtonPress > 50) {
			Serial.println("Button pressed!");
      lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Button pressed!");
  
		}

		// Remember last button press event
		lastButtonPress = millis();
	}

	// Put in a slight delay to help debounce the reading
	delay(1);
}