#include <Button.h>
#include <FastLED.h>

#define LED_PIN     11
#define BUTTON_PIN 10
#define NUM_LEDS    3
#define BRIGHTNESS  128
#define LED_TYPE    WS2812B
#define COLOR_ORDER GRB
#define UPDATES_PER_SECOND 100
#define PULLUP true        //To keep things simple, we use the Arduino's internal pullup resistor.
#define INVERT true        //Since the pullup resistor will keep the pin high unless the
                           //switch is closed, this is negative logic, i.e. a high state
                           //means the button is NOT pressed. (Assuming a normally open switch.)
#define DEBOUNCE_MS 20     //A debounce time of 20 milliseconds usually works well for tactile button switches.


Button myBtn(BUTTON_PIN, PULLUP, INVERT, DEBOUNCE_MS);    //Declare the button
CRGB leds[NUM_LEDS];

int showType = 0;
long pause = 20;
unsigned long previousMillis = 0;
unsigned long currentMillis = millis();
uint8_t bow = 0;
uint8_t hueTick = 0;

/* --------------EFFECTS---------------------------*/

void rainbow(int interval){

      fill_rainbow( &(leds[0]), NUM_LEDS, hueTick);
      LEDS.show();
      LEDS.delay(interval);
      if (hueTick >255) {hueTick = 0;}
}
/* --------------EFFECTS---------------------------*/

void setup()
{
  Serial.begin(9600);
   delay( 3000 ); // power-up safety delay
   FastLED.addLeds<LED_TYPE, LED_PIN, COLOR_ORDER>(leds, NUM_LEDS).setCorrection( TypicalLEDStrip );
   FastLED.setBrightness(  BRIGHTNESS );
 }

void loop()
 {
   hueTick++;
    myBtn.read();                    //Read the button

    if (myBtn.wasPressed()) {       //If the button was released, change the LED state
      showType++;
      if (showType >6) {showType=0;}}
 startShow(showType);
  }

  void startShow(int i) {
    switch(i){
      case 0: leds[0] = CRGB::Red;
      leds[1] = CRGB::Aqua;
      leds[2] = CRGB::Aqua;
      FastLED.show();
      break;

      case 1: leds[0] = CRGB::LimeGreen;
      leds[1] = CRGB::LimeGreen;
      leds[2] = CRGB::LimeGreen;
      FastLED.show();
      break;

      case 2: leds[0] = CRGB::Purple;
      leds[1] = CRGB::Purple;
      leds[2] = CRGB::Purple;
      FastLED.show();
      break;
      case 3: leds[0] = CRGB::DarkSlateBlue;
      leds[1] = CRGB::DarkSlateBlue;
      leds[2] = CRGB::DarkSlateBlue;
      FastLED.show();
      break;
      case 4:
      rainbow(10);
      break;
      case 5:
      leds[0] = CRGB::Gray;
      leds[1] = CRGB::Gray;
      leds[2] = CRGB::Gray;
      FastLED.show();
      break;
     case 6:  rainbow(40);
            break;
    }
    }