#include <Adafruit_NeoPixel.h>
#define NEOPIXEL_PIN 6  // Datenausgang für LEDs
#define NUMPIXELS 66    // Anzahl der LEDs
#define SENSORPIN1 A3   // Schalter hell
#define SENSORPIN2 A5   // Schalter dunkel
#define INPUT1 (1<<0)   // Bitmuster für Codeauswertung
#define INPUT2 (1<<1)   // Bitmuster für Codeauswertung
#define INPUT12 (INPUT1 | INPUT2)   // Bitmuster für Codeauswertung, beide Eingänge

Adafruit_NeoPixel pixels(NUMPIXELS, NEOPIXEL_PIN, NEO_GRBW + NEO_KHZ800);

int code, flanke;
int code_old;
bool led_active = false;

void setup() {

  pinMode(SENSORPIN1, INPUT);
  pinMode(SENSORPIN2, INPUT);
  pixels.begin();   
}

void EinschaltsequenzTag() {

  for(int i=0; i<(NUMPIXELS-8); i++) { 
    pixels.setPixelColor(i, pixels.Color(100,100,200,250)); // weiß wird hell dargestellt
    pixels.show();
    pixels.setPixelColor(i+1, pixels.Color(0,0,0,200));
    pixels.setPixelColor(i+2, pixels.Color(0,0,0,150));
    pixels.setPixelColor(i+3, pixels.Color(0,0,0,100)); 
    pixels.setPixelColor(i+4, pixels.Color(0,0,0,50));

    pixels.setPixelColor(i+5, pixels.Color(0,10,0,0));
    pixels.setPixelColor(i+6, pixels.Color(0,60,0,0));
    pixels.setPixelColor(i+7, pixels.Color(0,150,0,0)); 
    pixels.setPixelColor(i+8, pixels.Color(0,250,0,0)); // erstes Pixel grün
    pixels.show();
    delay(20);
  }
}

void EinschaltsequenzNacht() {

  for(int i=0; i<(NUMPIXELS-8); i++) { 
    pixels.setPixelColor(i, pixels.Color(20,20,20,20)); // weiß wird dunkel dargestellt
    pixels.show();
    pixels.setPixelColor(i+1, pixels.Color(0,0,0,20));
    pixels.setPixelColor(i+2, pixels.Color(0,0,0,30));
    pixels.setPixelColor(i+3, pixels.Color(0,0,0,40)); 
    pixels.setPixelColor(i+4, pixels.Color(0,0,0,50));

    pixels.setPixelColor(i+5, pixels.Color(0,10,0,0));
    pixels.setPixelColor(i+6, pixels.Color(0,60,0,0));
    pixels.setPixelColor(i+7, pixels.Color(0,150,0,0)); 
    pixels.setPixelColor(i+8, pixels.Color(0,250,0,0)); // erstes Pixel grün
    pixels.show();
    delay(20);
  }
}

void EingeschaltenTag() {

  for(int i=0; i<NUMPIXELS; i++) {
    pixels.setPixelColor(i, pixels.Color(100,100,200,250)); // helles Weiß
    pixels.show();
  }
}

void EingeschaltenNacht() {
  for(int i=0; i<(NUMPIXELS-8); i++) {
    pixels.setPixelColor(i, pixels.Color(20,20,20,20)); // dunkles Weiß
    pixels.show();
  }
}

void Ausschaltsequenz() {

  for (int i=NUMPIXELS-1; i>=4; i--) { 
    pixels.setPixelColor(i, pixels.Color(0,0,0,0));
    pixels.show();
    pixels.setPixelColor(i-1, pixels.Color(20,0,0,0)); //letztes Pixel rot
    pixels.setPixelColor(i-2, pixels.Color(60,0,0,0));
    pixels.setPixelColor(i-3, pixels.Color(120,0,0,0));
    pixels.setPixelColor(i-4, pixels.Color(255,0,0,0)); 
    pixels.show(); 
    delay(50);
  } 
}

void Ausgeschalten() {

    for(int i=0; i<NUMPIXELS; i++) { 
      pixels.setPixelColor(i, pixels.Color(0,0,0,0));
      pixels.show();
    }
}

void Bunt() {

  for(int i=NUMPIXELS-1; i>=0; i--) { 
    pixels.setPixelColor(i, pixels.Color(150,0,150,0)); // sind beide Kanäle "akiviert", leuchtet es pink   
    pixels.show();
    delay(20);
  } 
}

void loop() {
  
  if (digitalRead(SENSORPIN1)) code |= INPUT1;
  if (digitalRead(SENSORPIN1)) code |= INPUT2;
  flanke = code & ~code_old;
  code_old = code;
   
  if( (flanke & INPUT1) && !led_active) {   // Flanke Eingang1
    EinschaltsequenzTag();
    EingeschaltenTag();
    led_active = true;
  } else if( (flanke & INPUT2) && !led_active) { // Flanke Eingang2
    EinschaltsequenzNacht();
    EingeschaltenNacht();
    led_active = true;
  } else if( (code & INPUT12) ) { // beide Eingänge aktiv
    Bunt();
    led_active = true;
  } else if ( !(code & INPUT12) && led_active) { // beide Eingänge inaktiv
    Ausschaltsequenz();
    led_active = false;
  }
  delay(100);
}