(function () {
  'use strict';

  var config = window.aksrtWidgets || {};
  var reducedMotion = window.matchMedia && window.matchMedia('(prefers-reduced-motion: reduce)').matches;

  function once(el, key) {
    var name = 'aksrt' + key;
    if (el.dataset[name]) return false;
    el.dataset[name] = '1';
    return true;
  }

  function moveTabFocus(event, root) {
    var current = event.target.closest('[role="tab"]');
    if (!current) return;
    var tabs = Array.prototype.slice.call(root.querySelectorAll('[role="tab"]'));
    var index = tabs.indexOf(current);
    var next = index;
    if (event.key === 'ArrowRight') next = (index + 1) % tabs.length;
    else if (event.key === 'ArrowLeft') next = (index - 1 + tabs.length) % tabs.length;
    else if (event.key === 'Home') next = 0;
    else if (event.key === 'End') next = tabs.length - 1;
    else return;
    event.preventDefault();
    tabs[next].focus();
    tabs[next].click();
  }

  function videoType(url) {
    if (/\.m3u8(?:\?|$)/i.test(url)) return 'hls';
    if (/\.flv(?:\?|$)/i.test(url)) return 'flv';
    if (/\.mpd(?:\?|$)/i.test(url)) return 'dash';
    return 'auto';
  }

  function initVideo(el) {
    // 幂等标记落在 data-aksrt-widget-video；data-aksrt-video 是
    // AksrtVideoPlayer 的自动初始化契约，被扫到会在容器里再挂一个无源播放器。
    if (!once(el, 'WidgetVideo')) return;
    var fallback = el.querySelector('video');
    if (fallback) {
      fallback.addEventListener('error', function () {
        var message = el.querySelector('.aksrt-widget-media-error');
        if (message) message.hidden = false;
      });
    }
    function mountPlayer(event) {
      if (typeof window.DPlayer !== 'function' || el.aksrtPlayer) return;
      if (event) event.preventDefault();
      var holder = document.createElement('div');
      holder.className = 'aksrt-widget-video__player';
      el.insertBefore(holder, fallback || el.firstChild);
      try {
        el.aksrtPlayer = new window.DPlayer({
          container: holder,
          autoplay: el.dataset.autoplay === '1' && !reducedMotion,
          video: {
            url: el.dataset.videoUrl || '',
            pic: el.dataset.videoPoster || '',
            type: videoType(el.dataset.videoUrl || '')
          }
        });
        if (el.dataset.muted === '1' && el.aksrtPlayer.video) el.aksrtPlayer.video.muted = true;
        if (fallback) fallback.hidden = true;
      } catch (error) {
        holder.remove();
      }
    }
    if (fallback && fallback.classList.contains('lazyload')) {
      fallback.addEventListener('lazybeforeunveil', mountPlayer, { once: true });
    } else {
      mountPlayer();
    }
  }

  function initQuote(figure) {
    if (!once(figure, 'Quote')) return;
    if (window.AksrtYiyan) window.AksrtYiyan.init(figure);
  }

  function errorMarkup(page, append) {
    var i18n = config.i18n || {};
    return '<div class="aksrt-widget-request-error" role="alert"><span>' + (i18n.error || '加载失败，请重试。') + '</span><button type="button" data-widget-retry data-retry-page="' + page + '" data-retry-append="' + (append ? '1' : '0') + '">' + (i18n.retry || '重试') + '</button></div>';
  }

  function itemsUrl(widget, instance, page, segment) {
    var url = new URL(config.restUrl, window.location.href);
    var path = '/' + encodeURIComponent(widget) + '/items';
    if (url.searchParams.has('rest_route')) {
      url.searchParams.set('rest_route', url.searchParams.get('rest_route').replace(/\/$/, '') + path);
    } else {
      url.pathname = url.pathname.replace(/\/$/, '') + path;
    }
    url.searchParams.set('instance', instance);
    url.searchParams.set('page', page);
    if (segment !== undefined && segment !== '') url.searchParams.set('segment', segment);
    return url.href;
  }

  function loaderOf(container) {
    if (!container) return null;
    return container.querySelector('.post_ajax_loader');
  }

  function fallbackLoader() {
    var text = (window.aksrtData && aksrtData.ajaxLoading) || '加载中...';
    var node = document.createElement('div');
    node.className = 'post_ajax_loader';
    node.setAttribute('role', 'status');
    node.innerHTML = '<div class="mb20"><div class="text-center muted-2-color mt20"><i class="loading mr10"></i>' + text + '</div></div>';
    return node;
  }

  function setBusy(container, busy) {
    if (!container) return;
    if (busy) {
      container.dataset.loading = '1';
      container.setAttribute('aria-busy', 'true');
      // 骨架开关走 .is-loading 类（modal-runtime.css），不写 inline display。
      var loader = loaderOf(container) || container.appendChild(fallbackLoader());
      loader.classList.add('is-loading');
    } else {
      delete container.dataset.loading;
      container.setAttribute('aria-busy', 'false');
      var loader = loaderOf(container);
      if (loader) loader.classList.remove('is-loading');
    }
  }

  // 追加时骨架紧跟已有条目；替换时先清空旧页，骨架留在新页的位置。
  // 请求成功后隐藏并保留同一个骨架节点，供下一轮请求复用。
  function anchorLoader(container) {
    var pag = container.querySelector(':scope > .ajax-pag');
    var loader = loaderOf(container);
    if (!loader) return null;
    if (pag) {
      pag.parentNode.insertBefore(loader, pag);
    } else {
      container.appendChild(loader);
    }
    return loader;
  }

  function loadItems(container, page, append) {
    var owner = container.closest('[data-widget]') || container;
    var widget = owner.dataset.widget || container.dataset.widget;
    var instance = owner.dataset.instance || container.dataset.instance;
    var segment = container.dataset.segment || owner.dataset.segment || '';
    if (!widget || !instance || !config.restUrl || container.dataset.loading === '1') return;
    container.querySelectorAll(':scope > .aksrt-widget-request-error').forEach(function (error) { error.remove(); });
    setBusy(container, true);
    var previous = [];
    if (!append) {
      // 对齐参考主题 beforeSend：数字分页与跳页先移除旧内容，而非等待响应。
      // 暂存原节点，只在请求失败时恢复内容和分页控件。
      var loader = loaderOf(container);
      Array.prototype.slice.call(container.children).forEach(function (child) {
        if (child === loader) return;
        previous.push(child);
        child.remove();
      });
    }
    anchorLoader(container);
    return fetch(itemsUrl(widget, instance, page, segment), { credentials: 'same-origin', headers: { Accept: 'application/json' } })
      .then(function (response) { if (!response.ok) throw new Error('items'); return response.json(); })
      .then(function (data) {
        var fragment = document.createElement('div');
        fragment.innerHTML = String(data.html || '');
        var anchor = loaderOf(container) || container.querySelector(':scope > .ajax-pag');
        Array.prototype.slice.call(fragment.children).forEach(function (node) {
          if (anchor && anchor.parentNode === container) {
            container.insertBefore(node, anchor);
          } else {
            container.appendChild(node);
          }
        });
        Array.prototype.slice.call(container.querySelectorAll(':scope > .ajax-pag')).forEach(function (node) { node.remove(); });
        if (data.paginate_html) container.insertAdjacentHTML('beforeend', data.paginate_html);
        container.dataset.page = String(data.page || page);
        container.dataset.loaded = '1';
        anchorLoader(container);
        previous = [];
        scan(container);
        if (window.jQuery) window.jQuery(document).trigger('auto_fun');
      })
      .catch(function () {
        var loader = loaderOf(container);
        previous.forEach(function (node) { container.insertBefore(node, loader); });
        anchorLoader(container);
        if (loader && loader.parentNode === container) {
          loader.insertAdjacentHTML('beforebegin', errorMarkup(page, append));
        } else {
          container.insertAdjacentHTML('afterbegin', errorMarkup(page, append));
        }
      })
      .finally(function () { setBusy(container, false); });
  }

  function initItems(container) {
    if (!once(container, 'Items')) return;
    if (container.hasAttribute('data-widget-lazy') && container.dataset.loaded !== '1') {
      container.addEventListener('lazybeforeunveil', function (event) {
        if (event.target === container && container.dataset.loaded !== '1') loadItems(container, 1, false);
      });
      // main.js loads asynchronously through loader_js. Its lazySizes scan
      // may finish before this client binds, so consume an unveiled pager.
      if (!container.classList.contains('lazyload')) loadItems(container, 1, false);
    }
    function jumpTo(input) {
      var page = Math.min(Number(input.max), Math.floor(Number(input.value)));
      if (!Number.isFinite(page) || page < 1 || page === Number(container.dataset.page || 1)) {
        input.focus();
        return;
      }
      loadItems(container, page, false);
    }
    container.addEventListener('input', function (event) {
      if (!event.target.matches('[data-widget-jump]')) return;
      event.stopPropagation();
      var page = Math.floor(Number(event.target.value));
      event.target.value = page > 0 ? String(Math.min(Number(event.target.max), page)) : '';
    });
    container.addEventListener('keydown', function (event) {
      if (event.key !== 'Enter' || !event.target.matches('[data-widget-jump]')) return;
      event.preventDefault();
      event.stopPropagation();
      jumpTo(event.target);
    });
    container.addEventListener('click', function (event) {
      var jump = event.target.closest('[data-widget-jump-go]');
      if (jump) {
        event.preventDefault();
        event.stopPropagation();
        jumpTo(jump.parentElement.querySelector('[data-widget-jump]'));
        return;
      }
      var retry = event.target.closest('[data-widget-retry]');
      var trigger = event.target.closest('[data-next-page]');
      var pageLink = event.target.closest('.page-numbers[data-widget-page]');
      if (retry) {
        event.preventDefault();
        loadItems(container, Number(retry.dataset.retryPage || 1), retry.dataset.retryAppend === '1');
        return;
      }
      if (trigger) {
        event.preventDefault();
        loadItems(container, Number(trigger.dataset.nextPage || 2), true);
        return;
      }
      if (pageLink) {
        event.preventDefault();
        loadItems(container, Number(pageLink.dataset.widgetPage || 1), false);
      }
    });
  }

  function initTabs(tabs) {
    if (!once(tabs, 'Tabs')) return;
    tabs.addEventListener('keydown', function (event) { moveTabFocus(event, tabs); });
    tabs.addEventListener('click', function (event) {
      var button = event.target.closest('[role="tab"][data-segment]');
      if (!button) return;
      event.preventDefault();
      var nav = button.closest('[role="tablist"]');
      if (nav && nav.scrollWidth > nav.clientWidth) {
        var tabBounds = button.getBoundingClientRect();
        var navBounds = nav.getBoundingClientRect();
        nav.scrollTo({ left: nav.scrollLeft + tabBounds.left - navBounds.left + tabBounds.width / 2 - nav.clientWidth / 2, behavior: reducedMotion ? 'auto' : 'smooth' });
      }
      tabs.querySelectorAll('[role="tab"]').forEach(function (tab) {
        tab.setAttribute('aria-selected', tab === button ? 'true' : 'false');
        tab.setAttribute('tabindex', tab === button ? '0' : '-1');
        if (tab.parentElement) tab.parentElement.classList.toggle('active', tab === button);
      });
      tabs.querySelectorAll('.tab-content > .tab-pane').forEach(function (item) {
        var active = item.id === button.getAttribute('aria-controls');
        item.classList.toggle('active', active); item.classList.toggle('in', active);
      });
      var panel = tabs.querySelector('[data-widget-items][data-segment="' + button.dataset.segment + '"]');
      if (!panel) return;
      if (panel.dataset.loaded !== '1') loadItems(panel, 1, false);
    });
  }

  function initFaq(faq) {
    if (!once(faq, 'Faq')) return;
    faq.addEventListener('click', function (event) {
      var button = event.target.closest('.aksrt-faq__item > button');
      if (!button) return;
      var expanded = button.getAttribute('aria-expanded') === 'true';
      button.setAttribute('aria-expanded', expanded ? 'false' : 'true');
      var panel = document.getElementById(button.getAttribute('aria-controls'));
      if (panel) panel.hidden = expanded;
    });
    var search = faq.querySelector('input[type="search"]');
    if (search) search.addEventListener('input', function () {
      var needle = search.value.trim().toLowerCase();
      faq.querySelectorAll('.aksrt-faq__item').forEach(function (item) { item.hidden = needle && String(item.dataset.search || '').toLowerCase().indexOf(needle) === -1; });
    });
  }

  function initFeatures(features) {
    if (!once(features, 'Features')) return;
    features.addEventListener('keydown', function (event) { moveTabFocus(event, features); });
    features.addEventListener('click', function (event) {
      var button = event.target.closest('[data-feature-index]');
      if (!button) return;
      var index = button.dataset.featureIndex;
      features.querySelectorAll('[data-feature-index]').forEach(function (tab) {
        tab.setAttribute('aria-selected', tab === button ? 'true' : 'false');
        tab.setAttribute('tabindex', tab === button ? '0' : '-1');
      });
      features.querySelectorAll('[data-feature-panel]').forEach(function (panel) { panel.hidden = panel.dataset.featurePanel !== index; });
    });
  }

  function initCount(el) {
    if (!once(el, 'Count') || reducedMotion) return;
    var raw = el.dataset.countUp || '';
    var match = raw.match(/-?[0-9]+(?:\.[0-9]+)?/);
    if (!match) return;
    var target = Number(match[0]);
    var prefix = raw.slice(0, match.index);
    var suffix = raw.slice(match.index + match[0].length);
    var start = performance.now();
    function frame(now) {
      var progress = Math.min(1, (now - start) / 900);
      el.textContent = prefix + Math.round(target * (1 - Math.pow(1 - progress, 3))) + suffix;
      if (progress < 1) requestAnimationFrame(frame);
    }
    requestAnimationFrame(frame);
  }

  /* 幻灯片加图文视频卡片：以左侧幻灯片实际高度重算右侧卡片比例。
   * 合作伙伴滚动由运行时 main.js 初始化（.zib-partners-scroll 唯一所有者）。 */
  function measureSliderGraphic(widget) {
    if (once(widget, 'Combo')) return;
    var slider = widget.querySelector('.slider-col .zib-slider') || widget.querySelector('.slider-col');
    var covers = widget.querySelector('.cover-col');
    if (!slider || !covers) return;
    var row = Number(widget.dataset.row || 2);
    var col = Number(widget.dataset.col || 2);
    var gap = 10;
    function update() {
      var height = slider.offsetHeight;
      var width = covers.offsetWidth;
      if (!height || !width) return;
      var ratio = (((height - (col - 1) * gap) / col) / ((width - (row - 1) * gap) / row)) * 100;
      covers.style.setProperty('--cover-ratio', ratio.toFixed(2) + '%');
    }
    update();
    window.addEventListener('resize', update, { passive: true });
    if ('ResizeObserver' in window) new ResizeObserver(update).observe(slider);
  }

  function scan(root) {
    var scope = root || document;
    scope.querySelectorAll('.aksrt-widget-video[data-video-url]').forEach(initVideo);
    scope.querySelectorAll('.aksrt-widget-quote').forEach(initQuote);
    if (scope.matches && scope.matches('[data-widget-items]')) initItems(scope);
    scope.querySelectorAll('[data-widget-items]').forEach(initItems);
    scope.querySelectorAll('.widget-tab-post').forEach(initTabs);
    scope.querySelectorAll('.aksrt-faq').forEach(initFaq);
    scope.querySelectorAll('.aksrt-feature-intro').forEach(initFeatures);
    scope.querySelectorAll('[data-count-up]').forEach(initCount);
    scope.querySelectorAll('.widget-slider-graphic').forEach(measureSliderGraphic);
    if (typeof window.VanillaTilt !== 'undefined') scope.querySelectorAll('[data-aksrt-tilt]').forEach(function (el) { if (once(el, 'Tilt')) window.VanillaTilt.init(el); });
  }

  function ready() {
    scan(document);
    if ('MutationObserver' in window) {
      new MutationObserver(function (mutations) {
        mutations.forEach(function (mutation) { mutation.addedNodes.forEach(function (node) { if (node.nodeType === 1) scan(node); }); });
      }).observe(document.body, { childList: true, subtree: true });
    }
  }

  if (document.readyState === 'loading') document.addEventListener('DOMContentLoaded', ready);
  else ready();

  // AJAX 注入新内容后由 auto_fun 重扫（once() data 标记保证幂等）。
  if (window.jQuery) window.jQuery(document).on('auto_fun', function () { scan(document); });
})();