#include <SPI.h>
#include <Adafruit_NeoPixel.h>

#define Neon 10
#define NUMPIXELS 16

#define CS 8

boolean badgeDetected = false;

Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, Neon, NEO_GRB + NEO_KHZ800);

int delayval = 100;

void setup() {
  Serial.begin(115200);
  SPI.begin();
  pinMode(CS, OUTPUT);
  digitalWrite(CS, HIGH);

#if defined (__AVR_ATtiny85__)
  if (F_CPU == 16000000) clock_prescale_set(clock_div_1);
#endif
  pixels.begin();
  xTaskCreate(CheckBadge, "CheckBadge", 2048, NULL, 1, NULL);
  xTaskCreate(NeoDriver, "NeoDriver", 2048, NULL, 1, NULL);
}

void loop() {
}

void CheckBadge(void *pvParameters) {
  while (true) {
    digitalWrite(CS, LOW);

    SPI.beginTransaction(SPISettings(1000000, MSBFIRST, SPI_MODE0));
    byte b = SPI.transfer(0);
    SPI.endTransaction();

    digitalWrite(CS, HIGH);

    if (b != 0) {
      Serial.printf("Received: %c (%d)\n", b, b);
      badgeDetected = true;
    } else {
      badgeDetected = false;
    }
    vTaskDelay(100 / portTICK_PERIOD_MS);
  }
}

void NeoDriver(void *pvParameters) {
  while (true) {
    if (badgeDetected){
      ScanDetected();
    } else {
      xTaskCreate(Animation, "Animation", 2048, NULL, 1, NULL);
    }
    vTaskDelay(1 / portTICK_PERIOD_MS);
  }
}


void Animation(void *pvParameters)
{
  pixels.clear();
  pixels.show();
  for (int i = NUMPIXELS - 1; i >= 0; i--) {
    pixels.setPixelColor(i, Adafruit_NeoPixel::Color(255, 0, 0));
    pixels.show();
    delay(100);
    pixels.setPixelColor(i, 0);
    pixels.show();
  }

}

void ScanDetected()
{
  for (int i = NUMPIXELS - 1; i >= 0; i--) {
    pixels.setPixelColor(i, Adafruit_NeoPixel::Color(0, 255, 0));
    pixels.show();
  }
}