/**
 * AKSRT Comment System — AJAX submit, captcha, ordering, author filter
 */
(function () {
  "use strict";

  function initCommentSystem() {
    var form = document.querySelector("#commentform");
    if (!form || form.dataset.aksrtCommentInit === "1") return;
    form.dataset.aksrtCommentInit = "1";

    // 修复：同时匹配 button 和 input 元素
    var submitBtn = form.querySelector('[type="submit"]');
    if (!submitBtn) return;
    var isInputSubmit = submitBtn.tagName === 'INPUT';

    // 保存原始按钮内容（用于恢复）
    var originalBtnHTML = isInputSubmit ? submitBtn.value : submitBtn.innerHTML;

    function setSubmitBtnContent(html, textFallback) {
      if (isInputSubmit) {
        submitBtn.value = textFallback;
      } else {
        submitBtn.innerHTML = html;
      }
    }

    // 状态管理
    var isSubmitting = false;
    var countdownTimer = null;

    // 显示/隐藏加载状态
    function setLoading(loading) {
      if (loading) {
        isSubmitting = true;
        submitBtn.classList.add("is-loading");
        submitBtn.disabled = true;
        var loadingText = (window.aksrtData && aksrtData.commentSubmittingText) || '发送中...';
        setSubmitBtnContent('<i class="fa fas fa-spinner fa-spin"></i> ' + loadingText, loadingText);
      } else {
        isSubmitting = false;
        submitBtn.classList.remove("is-loading");
        submitBtn.classList.remove('countdown-active');
        submitBtn.disabled = false;
        setSubmitBtnContent(originalBtnHTML, originalBtnHTML);
      }
    }

    // 收集表单数据（包含验证码字段）
    function collectFormData() {
      var formData = new FormData(form);

      // 确保包含必要的隐藏字段
      var postId = document.querySelector('input[name="comment_post_ID"]');
      if (postId && !formData.get('comment_post_ID')) {
        formData.append('comment_post_ID', postId.value);
      }

      return formData;
    }

    // 启动倒计时（用于频率限制）
    function startCountdown(seconds) {
      if (countdownTimer) clearInterval(countdownTimer);

      submitBtn.classList.add('countdown-active');
      submitBtn.disabled = true;
      var remaining = seconds;

      countdownTimer = setInterval(function () {
        setSubmitBtnContent(
          '<i class="fa fas fa-clock"></i> 请等待 ' + remaining + 's',
          '请等待 ' + remaining + 's'
        );

        if (--remaining <= 0) {
          clearInterval(countdownTimer);
          countdownTimer = null;
          submitBtn.classList.remove('countdown-active', 'is-loading');
          submitBtn.disabled = false;
          setSubmitBtnContent(originalBtnHTML, originalBtnHTML);
          isSubmitting = false;
        }
      }, 1000);
    }

    function updateCommentCount(delta) {
      var countEl = document.querySelector('#comments .title-theme small');
      if (!countEl) return;
      var text = countEl.textContent || '';
      var match = text.match(/(\d+)/);
      if (!match) return;
      var nextCount = Math.max(0, parseInt(match[1], 10) + delta);
      countEl.textContent = text.replace(match[1], String(nextCount));
    }
    // 执行实际的 REST 请求 — local insert instead of full-page re-fetch
    function performSubmit(captchaPayload) {
      setLoading(true);

      var formData = collectFormData();
      var restRoot = (window.aksrtData && aksrtData.siteUrl) ? String(aksrtData.siteUrl).replace(/\/$/, '') : '';
      var editId = form.querySelector('[name="edit_comment_ID"]');
      var isEdit = editId && parseInt(editId.value, 10) > 0;
      var restBase = (restRoot || '') + '/wp-json/aksrt/v1/comment/' + (isEdit ? 'edit' : 'submit');

      // Try REST endpoint for local-insert HTML response
      var restBody = {};
      formData.forEach(function (v, k) { restBody[k] = v; });
      Object.assign(restBody, captchaPayload || {});
      if (isEdit) {
        restBody.comment_id = parseInt(editId.value, 10);
        restBody.content = restBody.comment || restBody.content || '';
      }

      fetch(restBase, {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
          'X-WP-Nonce': (window.aksrtData && aksrtData.restNonce) || ''
        },
        credentials: 'same-origin',
        body: JSON.stringify(restBody)
      })
        .then(function (r) { return r.json(); })
        .then(function (json) {
          if (isEdit && json && json.success) {
            var cid = restBody.comment_id;
            var contentEl = document.querySelector('#comment-content-' + cid + ', [data-comment-id="' + cid + '"] .comment-content');
            var rendered = (json.data && json.data.content) || json.content || '';
            if (contentEl && rendered) contentEl.innerHTML = rendered;
            var textarea = form.querySelector('#comment');
            if (textarea) textarea.value = '';
            if (editId) editId.remove();
            restoreRespondPosition();
            setLoading(false);
            notyf(json.message || '评论已更新', 'success');
            var respondEl = document.getElementById('respond');
            if (respondEl && window.AksrtFixedInput) window.AksrtFixedInput(respondEl, 'hide');
            return;
          }
          if (json && json.success && json.html) {
            // Local insert: prepend new comment HTML
            localInsertComment(json.html, json.is_reply, json.parent_id, json.needs_moderation);

            var textarea = form.querySelector('#comment');
            if (textarea) textarea.value = '';

            var replyInfo = document.getElementById('comment-reply-info');
            if (replyInfo) replyInfo.style.display = 'none';

            // Wait time countdown
            if (json.wait_time && json.wait_time > 0) {
              startCountdown(json.wait_time);
            } else {
              setLoading(false);
            }

            // Move respond back to original position
            restoreRespondPosition();

            // Hide mobile FixedInput after successful submit.
            var respondEl = document.getElementById('respond');
            if (respondEl && window.AksrtFixedInput) {
              window.AksrtFixedInput(respondEl, 'hide');
            } else if (respondEl) {
              respondEl.classList.remove('show');
            }

            // If editing via moveForm, clear edit field.
            var editField = form.querySelector('[name="edit_comment_ID"]');
            if (editField) editField.remove();

            return;
          }

          if (json && json.code) {
            notyf(json.message || '评论提交失败', 'danger');
            if (json.wait_time) startCountdown(json.wait_time);
            else setLoading(false);
            return;
          }

          notyf('评论已提交', 'success');
          setLoading(false);
          setTimeout(function () { reloadCommentList(); }, 500);
        })
        .catch(function (error) {
          console.error('[AKSRT Comment] 提交失败:', error);
          notyf((error && error.message) || '网络连接失败，请检查网络后重试', 'danger');
          setLoading(false);
        })
        .finally(function () {
          if (window.AKSRTCaptcha) window.AKSRTCaptcha.reset('comment', form);
          if (!countdownTimer && isSubmitting) setLoading(false);
        });
    }

    function localInsertComment(html, isReply, parentId, needsModeration) {
      var temp = document.createElement('div');
      temp.innerHTML = html;
      var newComment = temp.firstElementChild;
      if (!newComment) { reloadCommentList(); return; }

      newComment.style.overflow = 'hidden';
      newComment.style.maxHeight = '0';
      newComment.style.opacity = '0';
      newComment.style.transition = 'max-height 0.4s ease, opacity 0.3s ease';
      if (isReply && parentId) {
        var parentComment = document.querySelector('#comment-' + parentId);
        if (parentComment) {
          var children = parentComment.querySelector(':scope > .children');
          if (!children) {
            children = document.createElement('ol');
            children.className = 'children';
            parentComment.appendChild(children);
          }
          children.insertBefore(newComment, children.firstChild);
        } else {
          prependToCommentList(newComment);
        }
      } else {
        prependToCommentList(newComment);
      }

      // slideDown animation
      requestAnimationFrame(function () {
        newComment.style.maxHeight = newComment.scrollHeight + 100 + 'px';
        newComment.style.opacity = '1';
        setTimeout(function () {
          newComment.style.maxHeight = '';
          newComment.style.overflow = '';
          newComment.style.transition = '';
        }, 500);
      });

      if (needsModeration) {
        notyf('评论已提交，等待管理员审核', 'info');
      } else {
        notyf('评论发布成功', 'success');
      }

      // legacy 事件顺序：先 post_ajax.ed，再全局 auto_fun 重扫
      newComment.dispatchEvent(new CustomEvent('post_ajax.ed', { bubbles: true }));
      if (typeof window.auto_fun === 'function') window.auto_fun();
      updateCommentCount(1);
    }

    function prependToCommentList(el) {
      var list = document.querySelector('#comments .commentlist');
      if (!list) return;
      // 插到筛选栏之后、最新评论之前
      var filter = list.querySelector('.comment-filter');
      if (filter && filter.nextSibling) {
        list.insertBefore(el, filter.nextSibling);
      } else {
        list.insertBefore(el, list.firstChild);
      }
    }

    function restoreRespondPosition() {
      var respond = document.getElementById('respond');
      var placeholder = document.getElementById('wp-temp-form-div');
      if (respond && placeholder && placeholder.parentNode) {
        placeholder.parentNode.insertBefore(respond, placeholder);
        placeholder.remove();
      }
    }
    // 核心表单提交事件处理器
    function handleSubmit(e) {
      // 如果已经在提交中或倒计时中，防止重复提交
      if (isSubmitting || countdownTimer) {
        e.preventDefault();
        e.stopImmediatePropagation();
        return false;
      }

      // 阻止默认表单提交
      e.preventDefault();
      e.stopImmediatePropagation();
      var captcha = window.AKSRTCaptcha;
      setLoading(true);
      (captcha ? captcha.run('comment', form) : Promise.resolve({})).then(function (captchaPayload) {
        if (captchaPayload === null) {
          notyf('人机验证未通过，请重试', 'warning');
          setLoading(false);
          return;
        }
        performSubmit(captchaPayload);
      }).catch(function () {
        notyf('人机验证未通过，请重试', 'warning');
        setLoading(false);
        if (captcha) captcha.reset('comment', form);
      });

      return false;
    }

    // 绑定表单提交事件（使用捕获阶段，高优先级）
    form.addEventListener('submit', handleSubmit, true);
  }


  function getCommentsRestBase() {
    var root = (window.aksrtData && aksrtData.siteUrl) ? String(aksrtData.siteUrl).replace(/\/$/, "") : "";
    return root + "/wp-json/aksrt/v1";
  }

  function getCurrentCommentPostId() {
    var input = document.querySelector('input[name="comment_post_ID"]');
    if (input && input.value) return parseInt(input.value, 10) || 0;
    var comments = document.getElementById("comments");
    if (comments && comments.dataset.postId) return parseInt(comments.dataset.postId, 10) || 0;
    return 0;
  }

  function getCurrentCommentOrder() {
    var active = document.querySelector("#comments .comment-order-box li.active .comment-orderby");
    if (active && active.dataset && active.dataset.order) return active.dataset.order;
    var url = new URL(window.location.href);
    return url.searchParams.get("aksrt_comment_order") || "newest";
  }

  function getCurrentAuthorOnly() {
    var btn = document.querySelector("#comments .btn-only-author");
    return !!(btn && btn.classList.contains("active") && btn.dataset.authorOnly === "0");
  }

  /* ====== 全局无参数加载：评论状态仅保存在客户端，地址栏不携带 ? 参数 ====== */
  var COMMENT_URL_PARAMS = ["cpage", "aksrt_comment_order", "aksrt_author_only"];
  var commentUrlStateCleaned = false;

  function stripCommentUrlParams() {
    if (commentUrlStateCleaned || !window.history || typeof window.history.replaceState !== "function") return;
    commentUrlStateCleaned = true;
    var url = new URL(window.location.href);
    var changed = false;
    COMMENT_URL_PARAMS.forEach(function (key) {
      if (url.searchParams.has(key)) {
        url.searchParams.delete(key);
        changed = true;
      }
    });
    if (changed) {
      // 服务端首屏已按参数渲染完毕，落地后地址栏回到无参干净链接。
      window.history.replaceState(null, "", url.toString());
    }
  }

  function getMaxCommentPages() {
    var pagenav = document.querySelector("#comments .pagenav[data-max-pages]");
    if (pagenav) {
      var max = parseInt(pagenav.dataset.maxPages, 10);
      if (max > 0) return max;
    }
    var jumpInput = document.querySelector("#comments .jump-input[max]");
    if (jumpInput) {
      var maxAttr = parseInt(jumpInput.getAttribute("max"), 10);
      if (maxAttr > 0) return maxAttr;
    }
    return 1;
  }

  function parseCommentPageFromHref(href) {
    if (!href || href === "#" || href.indexOf("javascript:") === 0) return 0;
    try {
      var url = new URL(href, window.location.href);
      var cpage = parseInt(url.searchParams.get("cpage"), 10);
      if (cpage > 0) return cpage;
      var match = url.pathname.match(/\/comment-page-([0-9]{1,})\/?$/);
      return match ? parseInt(match[1], 10) : 0;
    } catch (e) {
      return 0;
    }
  }

  function scrollCommentsIntoView() {
    var commentsArea = document.getElementById("comments");
    if (!commentsArea || typeof commentsArea.scrollIntoView !== "function") return;
    var rect = commentsArea.getBoundingClientRect();
    if (rect.top >= 0 && rect.top < window.innerHeight * 0.6) return;
    commentsArea.scrollIntoView({ behavior: "smooth", block: "start" });
  }

  function loadCommentPage(page, opts) {
    opts = opts || {};
    var commentsArea = document.getElementById("comments");
    if (!commentsArea) {
      return Promise.reject(new Error("comments area missing"));
    }
    var maxPages = getMaxCommentPages();
    page = parseInt(page, 10) || 1;
    page = Math.max(1, page);
    if (maxPages > 1) page = Math.min(page, maxPages);

    showListLoading(commentsArea);
    return fetchCommentFragment({
      order: getCurrentCommentOrder(),
      authorOnly: getCurrentAuthorOnly(),
      page: page
    }).then(function (json) {
      if (json && json.success && json.data) {
        applyFragmentPayload(commentsArea, json.data);
        if (!opts.noScroll) scrollCommentsIntoView();
        return true;
      }
      throw new Error("comment fragment failed");
    });
  }

  function applyFragmentPayload(commentsArea, data) {
    if (!commentsArea || !data || !data.html) return;

    // data.html 是完整的 <div id="postcomments">（含筛选、列表、分页）
    var tempList = document.createElement("div");
    tempList.innerHTML = data.html;
    var newListWrap = tempList.querySelector("#postcomments");
    if (!newListWrap) return;

    var currentListWrap = commentsArea.querySelector("#postcomments");
    if (currentListWrap) {
      currentListWrap.replaceWith(newListWrap);
    } else {
      commentsArea.appendChild(newListWrap);
    }

    var currentCount = commentsArea.querySelector(".title-theme small");
    if (currentCount && data.count_text) currentCount.textContent = data.count_text;

    // legacy 事件顺序：先 post_ajax.ed，再全局 auto_fun 重扫
    newListWrap.dispatchEvent(new CustomEvent("post_ajax.ed", { bubbles: true }));
    if (typeof window.auto_fun === "function") window.auto_fun();
  }

  function fetchCommentFragment(opts) {
    opts = opts || {};
    var postId = opts.postId || getCurrentCommentPostId();
    if (!postId) return Promise.reject(new Error("missing post id"));
    var order = opts.order || getCurrentCommentOrder() || "newest";
    var authorOnly = !!opts.authorOnly;
    var page = opts.page || 1;
    var qs = new URLSearchParams();
    qs.set("post_id", String(postId));
    qs.set("order", order);
    qs.set("page", String(page));
    if (authorOnly) qs.set("author_only", "1");
    var url = getCommentsRestBase() + "/comment/list?" + qs.toString();
    return fetch(url, {
      method: "GET",
      credentials: "same-origin",
      headers: {
        "X-WP-Nonce": (window.aksrtData && aksrtData.restNonce) || ""
      }
    }).then(function (r) { return r.json(); });
  }

  /* ====== 评论列表动态刷新 ====== */
  function showListLoading(commentsArea) {
    var list = commentsArea.querySelector(".commentlist");
    if (!list) return;
    // 保留筛选栏，清空条目并显示 legacy 骨架
    var filter = list.querySelector(".comment-filter");
    var loader = list.querySelector(".post_ajax_loader");
    var skeleton = loader ? loader.cloneNode(true) : null;
    Array.prototype.slice.call(list.children).forEach(function (child) {
      if (child !== filter && child !== loader) child.remove();
    });
    if (skeleton) {
      skeleton.style.display = "block";
      skeleton.removeAttribute("hidden");
      list.appendChild(skeleton);
    }
  }

  function reloadCommentList() {
    loadCommentPage(1, { noScroll: true }).catch(function (error) {
      console.error('[AKSRT Comment] 刷新评论列表失败:', error);
      window.location.reload();
    });
  }

  /* ====== 评论排序（最新 / 最早） ====== */
  /**
   * Locate #id within the given scope.
   * Document has getElementById; Element roots (AJAX panels) only have querySelector.
   */
  function findInScope(scope, id) {
    scope = scope || document;
    if (!scope) return null;
    if (scope.nodeType === 9) {
      return scope.getElementById(id);
    }
    if (scope.nodeType === 1) {
      if (scope.id === id) return scope;
      return typeof scope.querySelector === "function"
        ? scope.querySelector("#" + id)
        : null;
    }
    return null;
  }

  function initCommentOrder(root) {
    var scope = root || document;
    var commentsArea = findInScope(scope, "comments");
    if (!commentsArea || commentsArea.dataset.orderInit === "1") return;
    // Event delegation survives filter HTML replacement after AJAX refresh.
    commentsArea.dataset.orderInit = "1";

    function renderLoadingState() {
      showListLoading(commentsArea);
    }
    function applyCommentOrder(order) {
      if (order !== "newest" && order !== "oldest" && order !== "hottest") {
        order = "newest";
      }
      renderLoadingState();
      var authorOnly = getCurrentAuthorOnly();

      fetchCommentFragment({ order: order, authorOnly: authorOnly, page: 1 })
        .then(function (json) {
          if (json && json.success && json.data) {
            applyFragmentPayload(commentsArea, json.data);
            return;
          }
          throw new Error("order fragment failed");
        })
        .catch(function (error) {
          console.error("[AKSRT Comment] 排序刷新失败:", error);
          // 兜底整页刷新，地址栏保持无参。
          window.location.reload();
        });
    }

    function applyAuthorFilter(authorOnlyFlag) {
      renderLoadingState();
      var authorOnly = authorOnlyFlag === "1" || authorOnlyFlag === 1 || authorOnlyFlag === true;
      var order = getCurrentCommentOrder();

      fetchCommentFragment({ order: order, authorOnly: authorOnly, page: 1 })
        .then(function (json) {
          if (json && json.success && json.data) {
            applyFragmentPayload(commentsArea, json.data);
            return;
          }
          throw new Error("author fragment failed");
        })
        .catch(function (error) {
          console.error("[AKSRT Comment] Author filter failed:", error);
          // 兜底整页刷新，地址栏保持无参。
          window.location.reload();
        });
    }

    commentsArea.addEventListener("click", function (e) {
      var target = e.target;
      if (!target || typeof target.closest !== "function") return;

      // 「只看作者」同时带 comment-orderby，需优先于排序按钮判断
      var authorBtn = target.closest(".btn-only-author");
      if (authorBtn && commentsArea.contains(authorBtn)) {
        e.preventDefault();
        applyAuthorFilter(authorBtn.getAttribute("data-author-only") || "0");
        return;
      }

      var orderBtn = target.closest(".comment-orderby[data-order]");
      if (orderBtn && commentsArea.contains(orderBtn)) {
        e.preventDefault();
        applyCommentOrder(orderBtn.getAttribute("data-order") || "newest");
        return;
      }

      // 数字分页：本地 DOM 刷新，地址栏不携带参数（href 仅作无 JS 兜底）。
      var pageLink = target.closest(".pagenav a.page-numbers");
      if (pageLink && commentsArea.contains(pageLink) && !pageLink.classList.contains("pag-jump")) {
        var page = parseCommentPageFromHref(pageLink.getAttribute("href"));
        if (page > 0) {
          e.preventDefault();
          loadCommentPage(page).catch(function (error) {
            console.error("[AKSRT Comment] 分页刷新失败:", error);
            // AJAX 不可用时退回原始链接（pretty 链接本身无 ? 参数）。
            window.location.href = pageLink.href;
          });
        }
      }
    });
  }


  /* ====== 数字分页跳页（legacy pag-jump） ====== */
  var commentPageJumpBound = false;

  function jumpToCommentPage(page) {
    loadCommentPage(page).catch(function (error) {
      console.error("[AKSRT Comment] 跳页失败:", error);
      window.location.reload();
    });
  }

  function initCommentPageJump() {
    if (commentPageJumpBound) return;
    commentPageJumpBound = true;
    document.addEventListener("click", function (e) {
      var jump = e.target.closest ? e.target.closest("#comments .pag-jump") : null;
      if (!jump) return;
      e.preventDefault();
      var input = jump.querySelector(".jump-input");
      if (input) jumpToCommentPage(input.value);
    });
    document.addEventListener("keydown", function (e) {
      if (e.key !== "Enter") return;
      var input = e.target;
      if (!input || !input.classList || !input.classList.contains("jump-input")) return;
      if (!input.closest("#comments .pagenav")) return;
      e.preventDefault();
      jumpToCommentPage(input.value);
    });
  }

  /* ====== 评论操作三点下拉（主题自有交互，替代 vendor data-toggle 遗留委托） ======
   * 一次性文档级委托：AJAX 注入的新评论无需重绑；
   * open 类驱动的 .dropdown-menu 显隐 CSS 契约（含移动端 drop-fixed-sm 底部抽屉）保持不变。 */
  function closeAllCommentDropdowns() {
    document.querySelectorAll("#postcomments .dropdown.open").forEach(function (wrap) {
      wrap.classList.remove("open");
      var trigger = wrap.querySelector("[data-aksrt-comment-drop]");
      if (trigger) trigger.setAttribute("aria-expanded", "false");
    });
  }

  function initCommentActionDropdowns() {
    if (document.documentElement.dataset.aksrtCommentDropBound === "1") return;
    document.documentElement.dataset.aksrtCommentDropBound = "1";

    document.addEventListener("click", function (event) {
      var trigger = event.target.closest ? event.target.closest("[data-aksrt-comment-drop]") : null;
      if (trigger) {
        event.preventDefault();
        var wrap = trigger.closest(".dropdown");
        if (!wrap) return;
        var wasOpen = wrap.classList.contains("open");
        closeAllCommentDropdowns();
        if (!wasOpen) {
          wrap.classList.add("open");
          trigger.setAttribute("aria-expanded", "true");
        }
        return;
      }
      // 点击菜单项（举报/置顶/编辑/批准/删除）后收起菜单。
      var menuItem = event.target.closest ? event.target.closest("#postcomments .dropdown.open .dropdown-menu a") : null;
      if (menuItem) {
        closeAllCommentDropdowns();
        return;
      }
      if (!event.target.closest || !event.target.closest("#postcomments .dropdown.open")) {
        closeAllCommentDropdowns();
      }
    });

    document.addEventListener("keydown", function (event) {
      if (event.key === "Escape") closeAllCommentDropdowns();
    });
  }

  function init() {
    stripCommentUrlParams();
    initCommentSystem();
    initCommentPageJump();
    initCommentOrder();
  }

  // 顶层立即绑定：纯文档级委托，不依赖 DOM 就绪与 init() 是否成功；
  // 保证即使同文件后续初始化在异常环境中中断，三点菜单仍可开合。
  initCommentActionDropdowns();

  if (document.readyState === "loading") {
    document.addEventListener("DOMContentLoaded", init);
  } else {
    init();
  }
  // AJAX 注入新内容后由 auto_fun 重扫（form/commentsArea 均带 data 标记，重复调用幂等）。
  if (window.jQuery) {
    window.jQuery(document).on("auto_fun", init);
  }

  // 供 pagination.js 等模块复用：评论页码加载 / 列表刷新（局部 DOM，无 ? 参数）。
  window.AksrtComments = {
    loadPage: function (page, opts) { return loadCommentPage(page, opts); },
    reload: function () { reloadCommentList(); }
  };
})();