#include <Adafruit_NeoPixel.h>

#define neoPin 33      // Neopixel GPIO pin
#define buttonPin 34   // Push button GPIO pin
#define pixelNumber 8  // Number of pixels on the LED led

Adafruit_NeoPixel led = Adafruit_NeoPixel(pixelNumber, neoPin, NEO_GRB + NEO_KHZ800);

volatile bool press = false;  // Button control variable
static int c = 0;             // Mode control variable

// Function prototypes
bool button();
void check();
void rainbowEffects();
void wiper();
void chaser();

bool button() {
  if (digitalRead(buttonPin) == HIGH) {
    press = true;
    c++;
  } else {
    press = false;
  }
  return press;
}

void check() {
  while (c == 0) {
    chaser(led.Color(255, 255, 255), 50);  // White chaser
  }
  while (c == 1) {
    chaser(led.Color(255, 0, 0), 50);  // Red chaser
  }
  while (c == 2) {
    chaser(led.Color(0, 0, 255), 50);  // Blue chaser
  }
  while (c == 3) {
    chaser(led.Color(0, 200, 0), 50);  // Green chaser
  }
  while (c == 4) {
    wiper(led.Color(0, 0, 255), 50);  // Blue wiper
  }
  while (c == 5) {
    wiper(led.Color(0, 255, 0), 50);  // Green wiper
  }
  while (c == 6) {
    wiper(led.Color(255, 0, 0), 50);  // Red wiper
  }
  while (c == 7) {
    rainbowEffects();  // Rainbow effects
  }
  while (c == 8) {
    led.clear();
    chaser(led.Color(0, 0, 0), 50);  // Off
  }
}

void setup() {
  // LED initialization
  led.begin();
  led.setBrightness(150);
  led.show();
  // Button pin initialization
  pinMode(buttonPin, INPUT);
}

void loop() {
  chaser(led.Color(255, 255, 255), 50);  // White chaser
}

// Rainbow LED effects mode
void rainbowEffects() {
  for (long color1 = 0; color1 < 3 * 65536; color1 += 256) {
    for (int i = 0; i < led.numPixels(); i++) {
      int currentColor = color1 + (i * 65536L / led.numPixels());
      led.setPixelColor(i, led.gamma32(led.ColorHSV(currentColor)));
    }
    led.show();  // Update led strip
    if (button)
      check();
    delay(10);
  }
}

// Wiper mode
void wiper(uint32_t c, uint8_t d) {
  for (uint16_t i = 0; i < led.numPixels(); i++) {
    led.setPixelColor(i, c);
    led.show();
    if (button)
      check();
    delay(d);
  }
}

// Chaser mode
void chaser(uint32_t c, uint8_t d) {
  for (int j = 0; j < 10; j++) {
    for (int k = 0; k < 3; k++) {
      for (uint16_t i = 0; i < led.numPixels(); i = i + 3) {
        led.setPixelColor(i + k, c);
      }
      led.show();
      if (button)
        check();
      delay(d);
      for (uint16_t i = 0; i < led.numPixels(); i = i + 3) {
        led.setPixelColor(i + k, 0);
      }
      if (button)
        check();
    }
  }
}