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

  function showToast(msg, type) {
    if (window.aksrt && aksrt.notyf) {
      aksrt.notyf(msg, { type: type || "info", duration: 2200 });
    } else {
      console.log("[AKSRT Toast]", type, msg);
    }
  }

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

    // 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="fas fa-circle-notch 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;
    }

    // 从 wp_die() HTML 中提取错误信息
    function extractErrorMessage(html) {
      // WordPress wp_die() 输出格式: <p>错误信息</p>
      var match = html.match(/<p[^>]*>([^<]+)<\/p>/i);
      return match ? match[1].trim() : '未知错误';
    }

    // 从错误消息中提取等待时间（秒）
    function extractWaitTime(msg) {
      var match = msg.match(/(\d+)\s*秒/);
      return match ? parseInt(match[1]) : 0;
    }

    // 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="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-count');
      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 = '共 ' + nextCount + ' 条';
    }
    function handleResponse(responseText, statusCode) {
      try {
        // 情况1: 成功提交 - 包含评论ID或成功标记
        if (statusCode === 200 || statusCode === 201) {
          if (responseText.includes('comment-submitted') ||
            responseText.indexOf('id="comment-') !== -1 ||
            responseText.indexOf('awaiting-moderation') !== -1) {

            // 区分是否需要审核
            if (responseText.indexOf('审核') !== -1 ||
              responseText.indexOf('moderation') !== -1 ||
              responseText.includes('awaiting-moderation')) {
              showToast('评论已提交，等待管理员审核', 'info');
            } else {
              showToast('评论发布成功', 'success');
            }

            // 清空文本框
            var textarea = form.querySelector('#comment');
            if (textarea) textarea.value = '';

            // 重置回复状态
            var replyInfo = document.getElementById('comment-reply-info');
            if (replyInfo) replyInfo.style.display = 'none';

            // 刷新评论列表（延迟执行，确保后端处理完成）
            setTimeout(function () {
              reloadCommentList();
            }, 500);
            setLoading(false);

            return true;
          }
        }

        // 情况2: HTTP 429 频率限制
        if (statusCode === 429) {
          var errorMsg = extractErrorMessage(responseText);
          var waitSeconds = extractWaitTime(errorMsg);

          showToast(errorMsg, 'warning');

          if (waitSeconds > 0) {
            startCountdown(waitSeconds);
          } else {
            setLoading(false); // 无具体等待时间时恢复按钮
          }

          return false;
        }

        // 情况3: HTTP 403 权限不足（地区/IP/关键词等）
        if (statusCode === 403) {
          var forbiddenMsg = extractErrorMessage(responseText);
          showToast(forbiddenMsg, 'error');
          setLoading(false);
          return false;
        }

        // 情况4: 包含WordPress错误信息
        var errorMatch = responseText.match(/<p[^>]*>([^<]*(?:错误|失败|error|Error)[^<]*)<\/p>/i);
        if (errorMatch) {
          showToast(errorMatch[1].trim(), 'error');
          setLoading(false);
          return false;
        }
        // 默认情况：可能是成功或其他
        showToast('评论已提交', 'success');
        var textarea2 = form.querySelector('#comment');
        if (textarea2) textarea2.value = '';

        // 局部刷新评论列表（不再整页 reload）
        setTimeout(function () {
          reloadCommentList();
        }, 500);
        setLoading(false);

        return true;

      } catch (e) {
        console.error('[AKSRT Comment] 解析响应失败:', e);
        showToast('响应解析异常，请重试', 'error');
        setLoading(false);
        return false;
      }
    }

    // 执行实际的 AJAX 请求 — local insert instead of full-page re-fetch
    function performSubmit() {
      setLoading(true);

      var formData = collectFormData();
      var restBase = '/wp-json/aksrt/v1/comment/submit';

      // Try REST endpoint for local-insert HTML response
      var restBody = {};
      formData.forEach(function (v, k) { restBody[k] = v; });

      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 (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';
            // Reset captcha
            var captchaImg = form.querySelector('.imagecaptcha img');
            if (captchaImg) captchaImg.click();

            // 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();

            return;
          }

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

          showToast('评论已提交', 'success');
          setLoading(false);
          setTimeout(function () { reloadCommentList(); }, 500);
        })
        .catch(function () {
          // Fallback: submit to wp-comments-post.php directly
          performLegacySubmit();
        });
    }

    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 + ', [data-comment-id="' + parentId + '"]');
        if (parentComment) {
          var children = parentComment.querySelector('.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) {
        showToast('评论已提交，等待管理员审核', 'info');
      } else {
        showToast('评论发布成功', 'success');
      }

      if (window.AksrtFrontend) AksrtFrontend.rehydrate(newComment, 'ajax');
      updateCommentCount(1);
    }

    function prependToCommentList(el) {
      var list = document.querySelector('.commentlist, #comment-list > ol, #comment-list');
      if (list) 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();
      }
    }
    // Legacy fallback: POST to wp-comments-post.php
    function performLegacySubmit() {
      var formData = collectFormData();
      var actionUrl = form.getAttribute('action') || '/wp-comments-post.php';

      fetch(actionUrl, {
        method: 'POST',
        body: formData,
        credentials: 'same-origin',
        headers: { 'X-Requested-With': 'XMLHttpRequest' }
      })
        .then(function (response) {
          return response.text().then(function (text) {
            return { status: response.status, text: text, ok: response.ok };
          });
        })
        .then(function (result) {
          handleResponse(result.text, result.status);
        })
        .catch(function (error) {
          console.error('[AKSRT Comment] 提交失败:', error);

          if (error.message === 'Failed to fetch' || error.name === 'TypeError') {
            showToast('网络连接失败，请检查网络后重试', 'error');
          } else {
            showToast(error.message || '评论提交失败，请重试', 'error');
          }

          setLoading(false);
        })
        .finally(function () {
          // 兜底：避免异常分支漏掉状态恢复导致按钮卡在"发送中"
          if (!countdownTimer && isSubmitting) {
            setLoading(false);
          }
        });
    }

    // 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();
      // 检查验证码状态（如果有验证码组件）
      var captchaScene = window.AKSRTCaptchaState &&
        window.AKSRTCaptchaState.scenes &&
        window.AKSRTCaptchaState.scenes.comment;

      if (captchaScene && typeof captchaScene.verify === 'function') {
        // 有验证码：先触发验证流程
        setLoading(true);

        captchaScene.verify(function (verified) {
          if (verified !== false) {
            // 验证通过，执行 AJAX 提交
            performSubmit();
          } else {
            // 验证失败
            showToast('人机验证未通过，请重试', 'warning');
            setLoading(false);
          }
        });
      } else {
        // 无验证码或已经验证过：直接提交
        performSubmit();
      }

      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);
  }

  /* ====== 评论列表动态刷新 ====== */
  function reloadCommentList() {
    var listContainer = document.getElementById('comment-list');
    if (!listContainer) {
      // 降级：整页刷新
      window.location.reload();
      return;
    }

    var postIdInput = document.querySelector('input[name="comment_post_ID"]');
    if (!postIdInput) return;

    // 显示骨架屏加载效果
    listContainer.innerHTML = '<li class="comment-loading-skeleton">' +
      '<div class="aksrt-comment"><div class="aksrt-comment__body">' +
      '<div style="height:60px;background:#f0f0f0;border-radius:8px;margin-bottom:10px;animation:pulse 1.5s ease-in-out infinite;"></div>' +
      '<div style="height:20px;width:70%;background:#f0f0f0;border-radius:4px;animation:pulse 1.5s ease-in-out infinite;"></div>' +
      '</div></div></li>';
    // 获取当前页面 URL（带时间戳避免缓存）
    var currentUrl = window.location.href.split('#')[0];
    var bustUrl = currentUrl + (currentUrl.indexOf('?') === -1 ? '?' : '&') + '_cache_bust=' + Date.now();

    fetch(bustUrl, {
      method: 'GET',
      credentials: 'same-origin'
    })
      .then(function (response) { return response.text(); })
      .then(function (html) {
        // 从新页面提取评论列表
        var parser = new DOMParser();
        var doc = parser.parseFromString(html, 'text/html');
        var newList = doc.getElementById('comment-list');

        if (newList && newList.innerHTML.trim()) {
          listContainer.innerHTML = newList.innerHTML;

          // 更新评论计数
          var countEl = document.querySelector('.comments-count');
          var newCountEl = doc.querySelector('.comments-count');
          if (countEl && newCountEl) {
            countEl.textContent = newCountEl.textContent;
          }
        } else {
          listContainer.innerHTML = '';
        }
      })
      .catch(function (error) {
        console.error('[AKSRT Comment] 刷新评论列表失败:', error);
        // 失败时降级为整页刷新
        window.location.reload();
      });
  }

  /* ====== 评论排序（最新 / 最早） ====== */
  function initCommentOrder(root) {
    var scope = root || document;
    var commentsArea = scope.getElementById("comments");
    if (!commentsArea) return;
    if (commentsArea.dataset.orderInit === "1") return;
    commentsArea.dataset.orderInit = "1";

    function getPaginationEl(root) {
      if (!root) return null;
      return root.querySelector(".aksrt-comment-pagination, .comment-navigation");
    }

    function renderLoadingState() {
      var listContainer = commentsArea.querySelector("#comment-list");
      if (!listContainer) return;
      listContainer.innerHTML = '<li class="comment-loading-skeleton">' +
        '<div class="aksrt-comment"><div class="aksrt-comment__body">' +
        '<div style="height:60px;background:#f0f0f0;border-radius:8px;margin-bottom:10px;animation:pulse 1.5s ease-in-out infinite;"></div>' +
        '<div style="height:20px;width:70%;background:#f0f0f0;border-radius:4px;animation:pulse 1.5s ease-in-out infinite;"></div>' +
        '</div></div></li>';
    }
    function applyCommentOrder(order) {
      if (order !== "newest" && order !== "oldest" && order !== "hottest") {
        order = "newest";
      }

      renderLoadingState();

      var url = new URL(window.location.href);
      url.searchParams.set("aksrt_comment_order", order);
      url.searchParams.delete("cpage");
      var fetchUrl = new URL(url.toString());
      fetchUrl.searchParams.set("_cache_bust", Date.now().toString());

      fetch(fetchUrl.toString(), {
        method: "GET",
        credentials: "same-origin"
      })
        .then(function (response) { return response.text(); })
        .then(function (html) {
          var parser = new DOMParser();
          var doc = parser.parseFromString(html, "text/html");
          var newComments = doc.getElementById("comments");
          if (!newComments) {
            throw new Error("new comments area not found");
          }

          var currentFilter = commentsArea.querySelector(".comment-filter");
          var newFilter = newComments.querySelector(".comment-filter");
          if (currentFilter && newFilter) {
            currentFilter.replaceWith(newFilter.cloneNode(true));
          }

          var currentList = commentsArea.querySelector("#comment-list");
          var newList = newComments.querySelector("#comment-list");
          if (currentList && newList) {
            currentList.replaceWith(newList.cloneNode(true));
          }

          var currentPagination = getPaginationEl(commentsArea);
          var newPagination = getPaginationEl(newComments);
          if (currentPagination && newPagination) {
            currentPagination.replaceWith(newPagination.cloneNode(true));
          } else if (currentPagination && !newPagination) {
            currentPagination.remove();
          } else if (!currentPagination && newPagination) {
            var list = commentsArea.querySelector("#comment-list");
            if (list && list.parentNode) {
              list.parentNode.insertBefore(newPagination.cloneNode(true), list.nextSibling);
            }
          }
          var currentCount = commentsArea.querySelector(".comments-count");
          var newCount = newComments.querySelector(".comments-count");
          if (currentCount && newCount) {
            currentCount.textContent = newCount.textContent;
          }

          if (window.history && typeof window.history.replaceState === "function") {
            window.history.replaceState(null, "", url.toString());
          }

          if (window.AksrtFrontend) AksrtFrontend.rehydrate(commentsArea, 'ajax');
        })
        .catch(function (error) {
          console.error("[AKSRT Comment] 排序刷新失败:", error);
          window.location.href = url.toString();
        });
    }

    commentsArea.addEventListener("click", function (e) {
      var link = e.target.closest(".comment-orderby");
      if (link && commentsArea.contains(link)) {
        e.preventDefault();
        var order = (link.dataset && link.dataset.order) ? link.dataset.order : "newest";
        applyCommentOrder(order);
        return;
      }

      var authorLink = e.target.closest(".comment-author-filter");
      if (authorLink && commentsArea.contains(authorLink)) {
        e.preventDefault();
        var authorOnly = (authorLink.dataset && authorLink.dataset.authorOnly) ? authorLink.dataset.authorOnly : "1";
        applyAuthorFilter(authorOnly);
      }
    });

    function applyAuthorFilter(authorOnly) {
      renderLoadingState();

      var url = new URL(window.location.href);
      if (authorOnly === "1") {
        url.searchParams.set("aksrt_author_only", "1");
      } else {
        url.searchParams.delete("aksrt_author_only");
      }
      url.searchParams.delete("cpage");
      var fetchUrl = new URL(url.toString());
      fetchUrl.searchParams.set("_cache_bust", Date.now().toString());
      fetch(fetchUrl.toString(), {
        method: "GET",
        credentials: "same-origin"
      })
        .then(function (response) { return response.text(); })
        .then(function (html) {
          var parser = new DOMParser();
          var doc = parser.parseFromString(html, "text/html");
          var newComments = doc.getElementById("comments");
          if (!newComments) {
            throw new Error("new comments area not found");
          }

          var currentFilter = commentsArea.querySelector(".comment-filter");
          var newFilter = newComments.querySelector(".comment-filter");
          if (currentFilter && newFilter) {
            currentFilter.replaceWith(newFilter.cloneNode(true));
          }

          var currentList = commentsArea.querySelector("#comment-list");
          var newList = newComments.querySelector("#comment-list");
          if (currentList && newList) {
            currentList.replaceWith(newList.cloneNode(true));
          }

          if (window.history && typeof window.history.replaceState === "function") {
            window.history.replaceState(null, "", url.toString());
          }

          if (window.AksrtFrontend) AksrtFrontend.rehydrate(commentsArea, 'ajax');
        })
        .catch(function (error) {
          console.error("[AKSRT Comment] Author filter failed:", error);
          window.location.href = url.toString();
        });
    }
  }

  window.AksrtFrontend.register("aksrt-comment-system", function () { initCommentSystem(); });
  window.AksrtFrontend.register("aksrt-comment-order", function (root) { initCommentOrder(root); });
})();