/* Tema anahtarı + slider'lar + flash otomatik kapanma */
(function () {
  "use strict";

  // ---- Dark / light tema ----
  var root = document.documentElement;
  var stored = null;
  try { stored = localStorage.getItem("key-theme"); } catch (e) {}
  if (stored === "dark" || stored === "light") {
    root.setAttribute("data-theme", stored);
  } else {
    root.setAttribute("data-theme", "light");
  }

  var toggle = document.getElementById("themeToggle");
  if (toggle) {
    toggle.addEventListener("click", function () {
      var next = root.getAttribute("data-theme") === "dark" ? "light" : "dark";
      root.setAttribute("data-theme", next);
      try { localStorage.setItem("key-theme", next); } catch (e) {}
    });
  }

  // ---- Slider'lar ----
  document.querySelectorAll(".slider").forEach(function (slider) {
    var images = Array.prototype.slice.call(slider.querySelectorAll(".slides img"));
    if (images.length === 0) return;
    var current = 0;
    var interval = parseInt(slider.getAttribute("data-interval") || "4000", 10);
    var timer = null;

    var dotsBox = slider.querySelector(".dots");
    images.forEach(function (_, i) {
      var d = document.createElement("span");
      d.setAttribute("role", "button");
      d.setAttribute("aria-label", "Görsel " + (i + 1));
      d.addEventListener("click", function (ev) {
        ev.stopPropagation();
        go(i);
        restart();
      });
      dotsBox.appendChild(d);
    });
    var dots = Array.prototype.slice.call(dotsBox.children);

    function show() {
      images.forEach(function (img, i) {
        img.classList.toggle("active", i === current);
      });
      dots.forEach(function (d, i) {
        d.classList.toggle("active", i === current);
      });
    }

    function go(i) {
      current = (i + images.length) % images.length;
      show();
    }

    function next() { go(current + 1); }
    function prev() { go(current - 1); }
    function restart() {
      if (timer) clearInterval(timer);
      timer = setInterval(next, interval);
    }

    slider.querySelector(".next").addEventListener("click", function (ev) {
      ev.stopPropagation();
      next();
      restart();
    });
    slider.querySelector(".prev").addEventListener("click", function (ev) {
      ev.stopPropagation();
      prev();
      restart();
    });

    slider.addEventListener("mouseenter", function () {
      if (timer) clearInterval(timer);
    });
    slider.addEventListener("mouseleave", restart);

    show();
    restart();
  });

  // ---- Flash mesajları ----
  setTimeout(function () {
    document.querySelectorAll(".flash").forEach(function (el) {
      el.style.transition = "opacity .8s ease";
      el.style.opacity = "0";
      setTimeout(function () { el.remove(); }, 800);
    });
  }, 5000);
})();