// Automatic Slideshow - change image every 9 seconds
let slideIndex = 0;
var run = true;
demo();

export function plusSlides(n) {
  showSlides(slideIndex += n);
}

export function currentSlide(n) {
  showSlides(slideIndex = n);
}

function showSlides(n) {
  let i;
  let slides = document.getElementsByClassName("header-slides");
  let dots = document.getElementsByClassName("dot");

  if (n > slides.length) {slideIndex = 1}    
  if (n < 1) {slideIndex = slides.length}
  for (i = 0; i < slides.length; i++) {
    slides[i].style.display = "none";  
  }
  for (i = 0; i < dots.length; i++) {
    dots[i].className = dots[i].className.replace(" active", "");
  }
  slides[slideIndex-1].style.display = "block";  
  dots[slideIndex-1].className += " active";
}

export function stopDemo() {
  run = false;
}

export function startDemo() {
  run = true;
}

function demo() {
  if (run) {
    plusSlides(1);
    setTimeout(demo, 9000);
  }
}