// https://www.reddit.com/r/FastLED/comments/zdqvtq/pausing_beatsin16_at_0_and_resuming_from_0/

#include <FastLED.h>

uint8_t tempIndex = 0;
uint8_t hue = 0;


enum PinAssignments {
  encoderPinA = 2, // ขา S1
  encoderPinB = 3, // ขา S2
  clearButton = 5  // ขา Key
                // จ่ายไฟที่ขา +5v และ gnd
                // Example For Arduino Uno By www.ArduinoAll.com
};


int order = 0; 
unsigned int CHsv[3]; 
unsigned int colorhsv[3];
unsigned int *color;
unsigned int *h;
unsigned int *s;
unsigned int *v;


int valueupdate = 5;
const int maxval = 255;
const int minval = 0;

volatile unsigned int encoderPos = 0;  // สำหรับนับจำนวน
unsigned int lastReportedPos = 1;   // change management
static boolean rotating = false;    // debounce management

boolean A_set = false;
boolean B_set = false;

#define NUM_LEDS 28
CRGB leds[NUM_LEDS];
#define LED_PIN   4


void setup() {

  
  pinMode(encoderPinA, INPUT_PULLUP); // กำหนดโหมดเป็นแบบ Input pullup
  pinMode(encoderPinB, INPUT_PULLUP);
  pinMode(clearButton, INPUT_PULLUP);
  attachInterrupt(0, doEncoderA, CHANGE); //ทำงานแบบ interrupt เบอร์ 0 ในนี้คือขา pin 2
  attachInterrupt(1, doEncoderB, CHANGE); //ทำงานแบบ interrupt เบอร์ 1 ในนี้คือขา pin 3
  Serial.begin(9600);

  FastLED.addLeds<WS2812B, LED_PIN, GRB>(leds, NUM_LEDS);
    FastLED.setBrightness(255);
  FastLED.setCorrection(TypicalPixelString);

  colorhsv[0] = 10;
  colorhsv[1] = 200;
  colorhsv[2] = 255;

  color = colorhsv[0];
  h = colorhsv[0];
  s = colorhsv[1];
  v = colorhsv[2];
}


void loop() {

  ///////////////// Rotary Encoder ////////////////////////////
    rotating = true;  // reset the debouncer

  if (lastReportedPos != encoderPos) {
    Serial.print("Index:");
    Serial.println(encoderPos, DEC);
    lastReportedPos = encoderPos;
 
    color = &colorhsv[order];
    Serial.print("Click:Reset Index(");
    Serial.print(order);
    Serial.print("): ");
    Serial.print(*color);
    Serial.print(", ");
    Serial.print(colorhsv[0]);
    Serial.print(", ");
    Serial.print(colorhsv[1]);
    Serial.print(", ");
    Serial.println(colorhsv[2]);
  }

  if (digitalRead(clearButton) == LOW )  {
    //encoderPos = 0;

    order++;

    if(order > 2)
    {
      order = 0;
    }
    
    color = &colorhsv[order];
    Serial.print("Click:Reset Index(");
    Serial.print(order);
    Serial.print("): ");
    Serial.print(*color);
    Serial.print(", ");
    Serial.print(colorhsv[0]);
    Serial.print(", ");
    Serial.print(colorhsv[1]);
    Serial.print(", ");
    Serial.println(colorhsv[2]);

    delay(200);
  }
  //////////////////// FastLED /////////////////////////
  
  for (int i = 0; i < NUM_LEDS; i++) {
    //leds[i] = CHSV(hue, 255, 255);
    leds[i] = CHSV(hue + ( i*colorhsv[0]), colorhsv[1], colorhsv[2]);
  }

  EVERY_N_MILLISECONDS(15){
    hue++;
  }

  FastLED.show();
}


// คำสั่งทำงานแบบ interrupt เมื่อมีการหมุน
void doEncoderA() {
  // debounce
  if ( rotating ) delay (1);  // หน่วงเวลาป้องกันสัญญาณบกวน debounce

  // เช็คว่ามีบิดสวิตช์
  if ( digitalRead(encoderPinA) != A_set ) { // debounce once more
    A_set = !A_set;
    // adjust counter + if A leads B
    if ( A_set && !B_set )
      encoderPos += valueupdate;




    if(order == 1 )
    {
      encoderPos = encoderPos>maxval?0:encoderPos;
    }else if( order == 2)
    {
      encoderPos = encoderPos>maxval?0:encoderPos;
    }else
    {
      encoderPos = encoderPos>maxval?0:encoderPos;
    }

    *color = encoderPos;

    rotating = false;  // no more debouncing until loop() hits again
  }
}

// Interrupt on B changing state, same as A above
void doEncoderB() {
  if ( rotating ) delay (1);


  if ( digitalRead(encoderPinB) != B_set ) {
    B_set = !B_set;
    //  adjust counter - 1 if B leads A
    if ( B_set && !A_set )
      encoderPos -= valueupdate;

    // if(encoderPos > maxval)
    // {
    //    encoderPos = maxval;
    // }

    if(order == 1 )
    {
      encoderPos = encoderPos>maxval?maxval:encoderPos;
    }else if( order == 2)
    {
      encoderPos = encoderPos>maxval?maxval:encoderPos;
    }else
    {
      encoderPos = encoderPos>maxval?maxval:encoderPos;
    }

    
    *color = encoderPos;

    rotating = false;
  }
}