// Source: https://github.com/s-marley/FastLED-basics

#include <FastLED.h>

#define NUM_LEDS  180
#define LED_PIN 2
#define BTN_PIN 4
#define DELAY_TIME 5



const int SHORT_PRESS_TIME = 1000; // 500 milliseconds
const int LONG_PRESS_TIME  = 5000; // 1000 milliseconds

int lastState = LOW;  // the previous state from the input pin
int currentState;     // the current reading from the input pin
unsigned long pressedTime  = 0;
unsigned long releasedTime = 0;
bool state;
CRGB leds[NUM_LEDS];

void setup() {
  Serial.begin(9600);

  pinMode(BTN_PIN, INPUT_PULLUP);
  FastLED.addLeds<WS2812B, LED_PIN, GRB>(leds, NUM_LEDS);
  FastLED.setBrightness(50);
}

void on_right () {
  for (int i = 0; i < NUM_LEDS; i++) {
    leds[i] = CRGB::White;
    FastLED.show();
    delay(DELAY_TIME);
  }
}
void off_right() {
  for (int i = 0; i < NUM_LEDS; i++) {
    leds[i] = CRGB::Black;
    FastLED.show();
    delay(DELAY_TIME);
  }
}
void on_left () {
  for (int i = NUM_LEDS; i >= 0; i--) {
    leds[i] = CRGB::White;
    FastLED.show();
    delay(DELAY_TIME);
  }
}
void off_left() {
  for (int i = NUM_LEDS; i >= 0; i--) {
    leds[i] = CRGB::Black;
    FastLED.show();
    delay(DELAY_TIME);
  }
}

void main_loop() {
  if (state == false) {
    on_right();
    state = true;
  } else {
    off_right();
    state = false;
  }
}

void main_loop_back() {
  if (state == false) {
    on_left();
    state = true;
  } else {
    off_left();
    state = false;
  }
}


void loop() {
  currentState = digitalRead(BTN_PIN);
  if (lastState == HIGH && currentState == LOW)       // button is pressed
    pressedTime = millis();
  else if (lastState == LOW && currentState == HIGH) { // button is released
    releasedTime = millis();
    long pressDuration = releasedTime - pressedTime;
    Serial.print("pressed: ");
    Serial.print(pressedTime);
    Serial.print(", released: ");
    Serial.print(releasedTime);
    Serial.print(", duration: ");
    Serial.println(pressDuration);
    if (pressDuration > 10 && pressDuration < SHORT_PRESS_TIME && pressDuration > 0) {
      Serial.println("A short press is detected");
      main_loop();
    }
    if ( pressDuration > LONG_PRESS_TIME && pressDuration > 0) {
      Serial.println("A long press is detected, go to setup menu.");
      setup_menu();
    }
  }
  if (millis() > (pressedTime + LONG_PRESS_TIME) && currentState == LOW) 
    blink_when_ready_for_setup_menu();
  // save the the last state
  lastState = currentState;
}













void blink_when_ready_for_setup_menu() {
  Serial.println("Blink!");
  for (int i = 0; i < 10; i++) {
    leds[i] = CRGB::White;
    FastLED.show();
  }
  for (int i = 0; i < 10; i++) {
    leds[i] = CRGB::Black;
    FastLED.show();
  }
//  Serial.println("Wychodzimy z trybu serwisowego");
}



void setup_menu() {
  Serial.println("Wchodzimy w tryb serwisowy");
  for (int j = 0; j < 10; j++) {
    for (int i = 0; i < NUM_LEDS; i++) {
      leds[i] = CRGB::White;
    }
    FastLED.show();
    delay(50);
    for (int i = 0; i < NUM_LEDS; i++) {
      leds[i] = CRGB::Black;
    }
    FastLED.show();
    delay(50);
  }
  while (ButtonPre)




  Serial.println("Wychodzimy z trybu serwisowego");

}