/**
 * Enhance layout-2 inline search with AJAX suggestions (aksrt_search_suggestions).
 * Extends existing panel search without dual systems.
 */
(function () {
  "use strict";

  function initInlineSearchSuggest() {
    var form = document.querySelector('form[data-aksrt-search-form="inline"]');
    if (!form || !window.aksrtData || !aksrtData.ajaxUrl) return;

    var input = form.querySelector(".search-input");
    var group = form.querySelector(".form-group.relative, .form-group");
    if (!input || !group) return;

    var panel = group.querySelector(".navbar-inline-search-panel");
    if (!panel) {
      panel = document.createElement("div");
      panel.className = "dropdown-menu hover-show-con navbar-inline-search-panel";
      group.appendChild(panel);
    }

    var timer = null;
    var searchConfig = (window.aksrtData && aksrtData.search) || {};
    var suggestionsEnabled = searchConfig.suggestionsEnabled !== false;

    function typeValue() {
      var t = form.querySelector('input[name="aksrt_search_type"]');
      return (t && t.value) || searchConfig.defaultType || "post";
    }

    function renderItems(items) {
      var html = "";
      if (items && items.length) {
        html += '<div class="muted-2-color em09 mb6">' + (searchConfig.suggestTitle || "搜索建议") + "</div>";
        html += '<div class="navbar-inline-search-suggest">';
        items.forEach(function (it) {
          html +=
            '<a class="navbar-inline-search-suggest__item" href="' +
            (it.url || "#") +
            '"><span class="title">' +
            (it.title || "") +
            '</span>' +
            (it.meta ? '<span class="meta muted-2-color em09">' + it.meta + "</span>" : "") +
            "</a>";
        });
        html += "</div>";
      }
      // Keep hot keywords block if present as static sibling content was replaced —
      // re-append hots from data attribute if we stored them.
      var hots = form.getAttribute("data-hots");
      if (hots) {
        try {
          var arr = JSON.parse(hots);
          if (arr && arr.length) {
            html += '<div class="muted-2-color em09 mb6 mt10">热门搜索</div><div class="navbar-inline-search-hots">';
            arr.forEach(function (kw) {
              html +=
                '<a class="but jb-sm" href="' +
                (window.location.origin || "") +
                "/?s=" +
                encodeURIComponent(kw) +
                '">' +
                kw +
                "</a> ";
            });
            html += "</div>";
          }
        } catch (e) {}
      }
      panel.innerHTML = html || panel.innerHTML;
      panel.classList.add("is-open");
      panel.style.display = "block";
      panel.style.visibility = "visible";
    }

    // Persist hot keywords for re-render after suggestions
    var hotLinks = panel.querySelectorAll(".navbar-inline-search-hots a");
    if (hotLinks.length) {
      var kws = [];
      hotLinks.forEach(function (a) {
        kws.push((a.textContent || "").trim());
      });
      form.setAttribute("data-hots", JSON.stringify(kws));
    }

    function request(q) {
      if (!suggestionsEnabled || q.length < 2) {
        // restore hots-only
        if (form.getAttribute("data-hots")) {
          renderItems([]);
        }
        return;
      }
      var xhr = new XMLHttpRequest();
      xhr.open("POST", aksrtData.ajaxUrl, true);
      xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
      xhr.onload = function () {
        if (xhr.status < 200 || xhr.status >= 300) return;
        try {
          var json = JSON.parse(xhr.responseText);
          if (json.success && json.data && json.data.items) {
            renderItems(json.data.items);
          }
        } catch (e) {}
      };
      xhr.send(
        "action=aksrt_search_suggestions&nonce=" +
          encodeURIComponent(aksrtData.nonce) +
          "&q=" +
          encodeURIComponent(q) +
          "&type=" +
          encodeURIComponent(typeValue())
      );
    }

    input.addEventListener("input", function () {
      var q = (input.value || "").trim();
      if (timer) clearTimeout(timer);
      timer = setTimeout(function () {
        request(q);
      }, 180);
    });

    input.addEventListener("focus", function () {
      panel.style.display = "block";
      panel.style.visibility = "visible";
    });
  }

  if (window.AksrtFrontend && typeof window.AksrtFrontend.register === "function") {
    window.AksrtFrontend.register("aksrt-inline-search-suggest", function () {
      initInlineSearchSuggest();
    });
  } else if (document.readyState === "loading") {
    document.addEventListener("DOMContentLoaded", initInlineSearchSuggest);
  } else {
    initInlineSearchSuggest();
  }
})();