#define _DEBUG
#ifdef _DEBUG
#include <TinyDebug.h>
#else
#include "TrinketHidCombo.h"
#endif 

#include <Adafruit_NeoPixel.h>

#define ENCODER_CLK PB2
#define ENCODER_DT  PB1
#define ENCODER_BTN PB0

int8_t volume = 0;
boolean pause = false;
boolean mode = false;  
int8_t last_clk = HIGH;
long int last_changed = 0;
boolean click = false, click_stop = false, rotate_press = false;
int8_t rotate = 0;

#define PIN PB3					            //Pin 1 is DATA In on the bottom Ring
#define BRIGHTNESS 255 			      // brightness reduced (about 180mA max, 100mA average)
#define TOTAL_LED 16 // Fill by hand

Adafruit_NeoPixel strip = Adafruit_NeoPixel(TOTAL_LED, PIN, NEO_GRB + NEO_KHZ800);


void setup() {
  pinMode(ENCODER_CLK, INPUT);
  pinMode(ENCODER_DT, INPUT);
  pinMode(ENCODER_BTN, INPUT_PULLUP);
  _delay_ms(40);
#ifdef  _DEBUG
  Debug.begin();
  Debug.println(F("Hello, TinyDebug!"));
#endif
  strip.begin();
  strip.setBrightness(BRIGHTNESS); // set brightness
  strip.show(); // Initialize all pixels to 'off'

}

void loop() {
  //rainbowCycle(100);
  int bouton = digitalRead(ENCODER_BTN);
  if (millis() - last_changed > 50) {
    click_stop = (bouton == HIGH);
    if ( bouton == LOW ) {
      last_changed = millis();
      click = true;
    }
  }

  int new_clk = digitalRead(ENCODER_CLK);
  if (new_clk != last_clk) {
    last_clk = new_clk;

    int dt = digitalRead(ENCODER_DT);
    if (new_clk == LOW && dt == HIGH) rotate = 1;
    if (new_clk == LOW && dt == LOW)  rotate = -1;
  }

  if ( click && click_stop) { 
    if (rotate_press) { rotate_press = false; click = false; click_stop = false; }
    else {              
#ifdef  _DEBUG
      Debug.println("click ⏪"); 
#else
      if (mode) TrinketHidCombo.pressMultimediaKey(MMKEY_PLAYPAUSE);
      else      TrinketHidCombo.pressMultimediaKey(MMKEY_PLAYPAUSE);
#endif
      click = false; 
      click_stop = false;
      pause = !pause;
    }
  }

  if ( rotate < 0 ) {
    if (!click) 
#ifdef  _DEBUG
      Debug.println("Rotated counterclockwise ⏪");
#else
      if (mode) { TrinketKeyboard.mouseMove(5, 0, MOUSEBTN_MIDDLE_MASK); }
      else      { TrinketHidCombo.pressMultimediaKey(MMKEY_VOL_DOWN);    }
#endif
    else     
#ifdef  _DEBUG   
      Debug.println("Rotated counterclockwise + click ⏪");
#else
      if (mode) { TrinketKeyboard.pressKey(0, KEYCODE_END); TrinketKeyboard.pressKey(0, 0); }
      else      { TrinketHidCombo.pressMultimediaKey(MMKEY_SCAN_PREV_TRACK);                }
#endif
  }
    
  if ( rotate > 0 ) {
    if(!click) 
#ifdef  _DEBUG
      Debug.println("Rotated clockwise ⏩");
#else
      if (mode) { TrinketKeyboard.mouseMove(-5, 0, MOUSEBTN_MIDDLE_MASK); }
      else      { TrinketHidCombo.pressMultimediaKey(MMKEY_VOL_UP);       }
#endif
    else
#ifdef  _DEBUG       
      Debug.println("Rotated clockwise ⏩ + Click");
#else
      if (mode) { { TrinketKeyboard.pressKey(0, KEYCODE_HOME); TrinketKeyboard.pressKey(0, 0); }
      else      { TrinketHidCombo.pressMultimediaKey(MMKEY_SCAN_NEXT_TRACK); }
#endif
  }

  if (rotate && click ) rotate_press = true;
  volume += rotate;
  display();

  rotate = 0;
}

void display() {
  strip.clear();
  if (pause)
    strip.fill(strip.Color(0, 255, 255));
  else 
    strip.fill(
      (volume < 0
        ? strip.Color(125, 125, 0)
        :(volume < 50
          ? strip.Color(0, 125, 0) 
          : strip.Color(125, 0, 0))), 0, map(volume, -128, 127, 0, TOTAL_LED - 1));

  strip.show();

}

// Slightly different, this makes the rainbow equally distributed throughout
void rainbowCycle(uint8_t _wait) {
  uint16_t i, j;

  for (j = 0; j < 256 * 5; j++) { // 5 cycles of all colors on wheel
    for (i = 0; i < strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
    }
    strip.show();
    delay(_wait);
  }
}

uint32_t Wheel(byte WheelPos) {
  WheelPos = 255 - WheelPos;
  if (WheelPos < 85) {
    return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
  } else if (WheelPos < 170) {
    WheelPos -= 85;
    return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
  } else {
    WheelPos -= 170;
    return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
  }
}