/*
  Forum: https://forum.arduino.cc/t/goto-loop-gets-ignored-sometimes/1357468/6
  Wokwi: https://wokwi.com/projects/423791454389927937

*/

#include <FastLED.h>

#define NUM_LEDS 112
#define DATA_PIN 13
const int buttonPin = 2;
int buttonState = 0;      // Current state of the button
bool lastButtonState = false;  // Previous state of the button
bool loopStarted = false;      // Whether the loop has started
int halfWay;

enum Loops {FIRST,SECOND,THIRD, FORTH, IDLE};
Loops myLoop = FIRST;

CRGB leds[NUM_LEDS];

void setup() {
  FastLED.addLeds<WS2812, DATA_PIN, RGB>(leds, NUM_LEDS);
  pinMode(buttonPin, INPUT_PULLUP);  // Set the button pin as input with internal pull-up
    // Turn all LEDs off
  FastLED.clear();
  FastLED.show();
  halfWay = NUM_LEDS / 2;  // cuts strip in half

}

void fadeall() {
  for (int i = 0; i < NUM_LEDS; i++) {
    leds[i].nscale8(200);  // nscale is comet length (Small number - shorter tail)
  }
}


void loop() {
  switch(myLoop){
    case FIRST:
    break;
    case SECOND:
    break;
    case THIRD:
    break;
    case FORTH:
    break;
    case IDLE:
    break;
  }
}

void firstLoop(){
  // First loop: LED pattern fills outward from end
  for (int i = halfWay - 1; i >= 0; i--) {


    leds[halfWay + i] = CRGB(70, 254, 0);
    leds[halfWay - i] = CRGB(70, 254, 0);

    FastLED.setBrightness(120);
    FastLED.show();
    fadeall();  //remove for fill sweep.  Also change speed of fill to 30
    delay(20);  // Speed of fill (50)
  }
  myLoop = SECOND;
}

void secondLoop(){
  // Second loop: LED comet spreads out
  for (int i = 0; i <= halfWay; i++) {


    leds[halfWay + i] = CRGB(90, 254, 0);
    leds[halfWay - i] = CRGB(90, 254, 0);

    FastLED.setBrightness(120);
    FastLED.show();
    fadeall();
    delay(20);   // Speed of fill (50)
  }
  myLoop = THIRD;
}

void thirdLoop(){
  // Third loop: LED comet returns to the center
  for (int i = halfWay - 1; i >= 0; i--) {

    leds[halfWay + i] = CRGB(70, 254, 0);
    leds[halfWay - i] = CRGB(70, 254, 0);

    FastLED.show();
    fadeall();
    delay(20);   // Speed of fill (50)
  }
  // Turn off all LEDs
  for (int i = 0; i < NUM_LEDS; i++) {
    leds[i] = CRGB(0, 0, 0);
  }
  FastLED.show();
  delay(100);
  myLoop = SECOND;

};

void waitWhileButtonPressed(){
  while (digitalRead(buttonPin) == LOW) {
    delay(500);  // Debounce delay to avoid multiple triggers
    // Do nothing
  }
}  
/*

  // Read the current state of the button -------------------------------------
  buttonState = digitalRead(buttonPin);  // Button pressed when HIGH

  // Check if the button was just pressed (edge detection)
  if (buttonState && !lastButtonState) {
    loopStarted = !loopStarted;  // Toggle the state of the loop
    delay(100);  // Debounce delay to avoid multiple triggers
  }
  // Store the current button state for the next loop iteration
  lastButtonState = buttonState;

  // If the loop is started, do something
  if (loopStarted) {

    // Clear all LEDs
    FastLED.clear();
    FastLED.show();
    delay(100);

    // Set LED 16 through 21, 52 through 58, 92 through 97 at brightness 255 (4 LEDS ON)
    for (int i = 14; i <= 19; i++) {
      leds[i] = CRGB(70, 254, 0);
    }
    for (int i = 52; i <= 58; i++) {
      leds[i] = CRGB(70, 254, 0);
    }
    for (int i = 92; i <= 97; i++) {
      leds[i] = CRGB(70, 254, 0);
    }
    FastLED.setBrightness(255);
    FastLED.show();
    delay(500);



    // Hold until power removed
    while (digitalRead(buttonPin) == HIGH) {
      // do nothing

      // Read the current state of the button -------------------------------------
      buttonState = digitalRead(buttonPin);  // Button pressed when HIGH

      if (digitalRead(buttonPin) == LOW) {
        FastLED.clear();       // Clear the LEDs
        FastLED.show();        // Update the LED state
        delay(1000);           // Debounce delay

        goto checkAgain;
      }
    }
  }
}
*/