/* OpsxDB 文档站交互：搜索 / 代码复制 / 目录高亮 / 反馈 / 移动端导航 */
(function () {
  "use strict";

  /* ---------- 代码块：语言标签 + 复制按钮 + 轻量高亮 ---------- */
  document.querySelectorAll("article.md pre").forEach(function (pre) {
    var code = pre.querySelector("code");
    if (!code) return;
    var lang = (code.className.match(/language-([\w-]+)/) || [, ""])[1];
    if (lang) {
      var tag = document.createElement("span");
      tag.className = "lang-tag";
      tag.textContent = lang;
      pre.appendChild(tag);
    }
    // 复制按钮
    var btn = document.createElement("button");
    btn.className = "copy-btn";
    btn.type = "button";
    btn.textContent = "复制";
    btn.addEventListener("click", function () {
      navigator.clipboard.writeText(code.textContent).then(
        function () {
          btn.textContent = "已复制 ✓";
          setTimeout(function () { btn.textContent = "复制"; }, 1400);
        },
        function () { btn.textContent = "复制失败"; }
      );
    });
    pre.appendChild(btn);
    // JSON / bash 轻量高亮
    if (lang === "json") highlightJSON(code);
    else if (lang === "bash" || lang === "sh" || lang === "shell") highlightBash(code);
  });

  function esc(s) {
    return s.replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;");
  }
  function highlightJSON(code) {
    var src = code.textContent;
    code.innerHTML = esc(src).replace(
      /("(?:\\.|[^"\\])*")(\s*:)?|\b(true|false|null)\b|(-?\d+(?:\.\d+)?(?:[eE][+-]?\d+)?)/g,
      function (m, str, colon, kw, num) {
        if (str && colon) return '<span class="tok-key">' + str + "</span>" + colon;
        if (str) return '<span class="tok-str">' + str + "</span>";
        if (kw) return '<span class="tok-num">' + kw + "</span>";
        if (num) return '<span class="tok-num">' + num + "</span>";
        return m;
      }
    );
  }
  function highlightBash(code) {
    var lines = code.textContent.split("\n");
    code.innerHTML = lines
      .map(function (line) {
        if (/^\s*#/.test(line)) return '<span class="tok-com">' + esc(line) + "</span>";
        return esc(line).replace(/(^|\s)(-{1,2}[\w-]+)/g, '$1<span class="tok-key">$2</span>');
      })
      .join("\n");
  }

  /* ---------- blockquote 提示样式约定：> **提示** / > **注意** ---------- */
  document.querySelectorAll("article.md blockquote").forEach(function (bq) {
    var t = (bq.textContent || "").trim();
    if (/^(注意|警告|⚠)/.test(t)) bq.classList.add("warn");
    else if (/^(提示|说明|💡|Tip)/i.test(t)) bq.classList.add("tip");
  });

  /* ---------- 搜索 ---------- */
  var input = document.getElementById("search-input");
  var panel = document.getElementById("search-panel");
  var entries = null;
  var selIndex = -1;

  function ensureIndex(cb) {
    if (entries) return cb();
    fetch("/docs/search-data.json")
      .then(function (r) { return r.json(); })
      .then(function (data) { entries = data; cb(); })
      .catch(function () { entries = []; cb(); });
  }

  function snippet(text, q) {
    var i = text.toLowerCase().indexOf(q);
    if (i < 0) return text.slice(0, 60) + "…";
    var start = Math.max(0, i - 24);
    return (start > 0 ? "…" : "") + text.slice(start, i + q.length + 40) + "…";
  }

  function doSearch() {
    var q = input.value.trim().toLowerCase();
    selIndex = -1;
    if (!q) { panel.hidden = true; return; }
    ensureIndex(function () {
      var hits = [];
      entries.forEach(function (e) {
        var titleHit = e.title.toLowerCase().indexOf(q) >= 0;
        var idx = e.text.toLowerCase().indexOf(q);
        if (titleHit || idx >= 0) {
          hits.push({
            slug: e.slug,
            title: e.title,
            group: e.group,
            score: (titleHit ? 10 : 0) + (idx === 0 ? 3 : 0),
            snippet: titleHit ? snippet(e.text, q) : snippet(e.text, q),
          });
        }
      });
      hits.sort(function (a, b) { return b.score - a.score; });
      hits = hits.slice(0, 8);
      if (!hits.length) {
        panel.innerHTML = '<div class="search-empty">没有找到相关内容，换个关键词试试</div>';
      } else {
        panel.innerHTML = hits
          .map(function (h) {
            return (
              '<a class="search-item" href="/docs/' + h.slug + '">' +
              '<span class="si-title">' + h.title + '</span><span class="si-group">' + h.group + "</span>" +
              '<span class="si-snippet">' + h.snippet + "</span></a>"
            );
          })
          .join("");
      }
      panel.hidden = false;
    });
  }

  var debounce;
  if (input) {
    input.addEventListener("input", function () {
      clearTimeout(debounce);
      debounce = setTimeout(doSearch, 160);
    });
    input.addEventListener("focus", function () {
      if (input.value.trim()) doSearch();
    });
    input.addEventListener("keydown", function (e) {
      var items = panel.querySelectorAll(".search-item");
      if (e.key === "ArrowDown" && items.length) {
        e.preventDefault();
        selIndex = Math.min(selIndex + 1, items.length - 1);
      } else if (e.key === "ArrowUp" && items.length) {
        e.preventDefault();
        selIndex = Math.max(selIndex - 1, 0);
      } else if (e.key === "Enter") {
        if (selIndex >= 0 && items[selIndex]) { location.href = items[selIndex].href; return; }
        var first = items[0];
        if (first) location.href = first.href;
        return;
      } else if (e.key === "Escape") {
        panel.hidden = true;
        return;
      } else {
        return;
      }
      items.forEach(function (el, i) { el.classList.toggle("sel", i === selIndex); });
    });
    document.addEventListener("click", function (e) {
      if (!e.target.closest(".search")) panel.hidden = true;
    });
  }

  /* ---------- 目录滚动高亮 ---------- */
  var tocLinks = Array.prototype.slice.call(document.querySelectorAll(".toc-nav a"));
  if (tocLinks.length && "IntersectionObserver" in window) {
    var byId = {};
    tocLinks.forEach(function (a) { byId[a.getAttribute("href").slice(1)] = a; });
    var io = new IntersectionObserver(
      function (entries) {
        entries.forEach(function (en) {
          if (en.isIntersecting) {
            tocLinks.forEach(function (a) { a.classList.remove("active"); });
            var a = byId[en.target.id];
            if (a) a.classList.add("active");
          }
        });
      },
      { rootMargin: "-72px 0px -70% 0px", threshold: 0 }
    );
    document.querySelectorAll("article.md h2[id], article.md h3[id]").forEach(function (h) { io.observe(h); });
  }

  /* ---------- 反馈组件 ---------- */
  var fb = document.getElementById("feedback");
  if (fb) {
    var pageKey = "opsxdb-docs-fb:" + location.pathname;
    var voted = null;
    try { voted = localStorage.getItem(pageKey); } catch (e) {}
    var btns = fb.querySelectorAll(".fb-btn");
    var thanks = document.getElementById("fb-thanks");
    function mark(v) {
      btns.forEach(function (b) {
        if (b.dataset.v === v) b.classList.add("done");
      });
      thanks.hidden = false;
      try { localStorage.setItem(pageKey, v); } catch (e) {}
    }
    if (voted) mark(voted);
    btns.forEach(function (b) {
      b.addEventListener("click", function () { mark(b.dataset.v); });
    });
  }

  /* ---------- 打印 ---------- */
  var printBtn = document.getElementById("print-btn");
  if (printBtn) printBtn.addEventListener("click", function () { window.print(); });

  /* ---------- 移动端侧栏 ---------- */
  var menuBtn = document.getElementById("menu-btn");
  var sidebar = document.getElementById("sidebar");
  if (menuBtn && sidebar) {
    menuBtn.addEventListener("click", function () { sidebar.classList.toggle("open"); });
    document.addEventListener("click", function (e) {
      if (sidebar.classList.contains("open") && !e.target.closest(".sidebar") && !e.target.closest(".menu-btn")) {
        sidebar.classList.remove("open");
      }
    });
  }
})();