#include <TM1637Display.h>

// --- TM1637 Display Setup ---
#define CLK_PIN 5 // D5 connected to CLK
#define DIO_PIN 6 // D6 connected to DAT
TM1637Display display(CLK_PIN, DIO_PIN);

// --- Rotary Encoder Setup ---
#define ENCODER_CLK 2 
#define ENCODER_DT 3  
#define ENCODER_SW A0 

// --- Rotary Encoder Variables ---
volatile long encoderCount = 0; 
volatile long zeroOffset = 0; 

// --- Physical/Resolution Constants ---
const long PPR = 3600; 
const long SCALE_FACTOR = 10; 
const long MAX_DEGREES_X_SCALE = 360 * SCALE_FACTOR; 

// --- Interrupt Service Routine (ISR) ---
void readEncoder() {
  if (digitalRead(ENCODER_DT) == HIGH) {
    encoderCount++; 
  } else {
    encoderCount--; 
  }
}

void setup() {
  Serial.begin(9600);
  pinMode(ENCODER_CLK, INPUT_PULLUP);
  pinMode(ENCODER_DT, INPUT_PULLUP);
  pinMode(ENCODER_SW, INPUT_PULLUP); 
  attachInterrupt(digitalPinToInterrupt(ENCODER_CLK), readEncoder, RISING);
  display.setBrightness(0x0a); 
  display.clear();
}

void loop() {
  // --- 1. Read Button and Zero Function ---
  if (digitalRead(ENCODER_SW) == LOW) { 
    zeroOffset = encoderCount; 
    delay(200); 
  }

  // --- 2. Calculate Angle (Scaled) ---
  long currentCount = encoderCount - zeroOffset;
  long angle_scaled = (currentCount * MAX_DEGREES_X_SCALE) / PPR;
  long wrapped_angle_scaled = angle_scaled % MAX_DEGREES_X_SCALE; 
  if (wrapped_angle_scaled < 0) {
    wrapped_angle_scaled += MAX_DEGREES_X_SCALE;
  }
  int displayValue = (int)wrapped_angle_scaled;

  // --- 3. Format and Display (XXX.X format) ---
  
  // ***FIX: Using 0b1000 (8) as the decimal point bitmask***
  // This should place the decimal point after the third digit.
  display.showNumberDecEx(
    displayValue, 
    (0x00), // Trying the next common bitmask (8) for the decimal point
    true   
    //4,        
    //0         
  ); 

  // --- Debug Output ---
  float angle_float = (float)wrapped_angle_scaled / SCALE_FACTOR;
  Serial.print("Count: "); 
  Serial.print(currentCount);
  Serial.print(" | Angle: "); 
  Serial.println(angle_float, 1); 

  delay(10); 
}