/**
 * Nav menu senior submenu visual editors (graphic cards / multi-column).
 * Enhances WP Appearance → Menus fields for aksrt_menu_options JSON.
 *
 * @package AKSRT
 */
(function ($) {
  'use strict';

  function parseJSON(raw, fallback) {
    try {
      var data = JSON.parse(raw || '');
      return data && typeof data === 'object' ? data : fallback;
    } catch (e) {
      return fallback;
    }
  }

  function graphicTemplate() {
    return {
      arrangement: '',
      size: 'md',
      img_scale: 100,
      items: [{ img: '', title: '', badge: '', badge_class: 'jb-red', link: { url: '', text: '', target: '' } }],
    };
  }

  function multiTemplate() {
    return {
      columns: [
        {
          title: '',
          icon: '',
          img_icon: '',
          link: { url: '', text: '', target: '' },
          items: [{ title: '', icon: '', img_icon: '', link: { url: '', text: '', target: '' } }],
        },
      ],
    };
  }

  function field(name, label, value, type, withMedia) {
    type = type || 'text';
    var mediaBtn = withMedia
      ? ' <button type="button" class="button aksrt-sme-pick-img" data-for="' + name + '">选择图片</button>'
      : '';
    return (
      '<label class="aksrt-sme-field"><span>' +
      label +
      mediaBtn +
      '</span><input type="' +
      type +
      '" data-name="' +
      name +
      '" value="' +
      String(value || '').replace(/"/g, '&quot;') +
      '" class="widefat"></label>'
    );
  }

  function renderGraphicUI($wrap, data) {
    var html = '<div class="aksrt-sme-toolbar">';
    html += '<button type="button" class="button aksrt-sme-add-card">添加卡片</button>';
    html += ' <label style="margin-left:8px;">排列 ';
    html += '<select data-name="arrangement">';
    html += '<option value=""' + (!data.arrangement ? ' selected' : '') + '>自动换行</option>';
    html += '<option value="swiper"' + (data.arrangement === 'swiper' ? ' selected' : '') + '>单行滚动</option>';
    html += '</select></label>';
    html += '</div><div class="aksrt-sme-cards">';
    (data.items || []).forEach(function (item, i) {
      html += '<div class="aksrt-sme-card" data-index="' + i + '">';
      html += '<div class="aksrt-sme-card-head"><strong>卡片 #' + (i + 1) + '</strong>';
      html += ' <button type="button" class="button-link-delete aksrt-sme-del-card">删除</button></div>';
      html += field('img', '图片 URL', item.img || '', 'text', true);
      html += field('title', '标题', item.title || '');
      html += field('badge', '徽章', item.badge || '');
      html += field('badge_class', '徽章 class', item.badge_class || '');
      html += field('link.url', '链接', (item.link && item.link.url) || '');
      html += '</div>';
    });
    html += '</div>';
    html += field('size', '尺寸 sm/md/lg/xs', data.size || 'md');
    html += field('img_scale', '图片比例%', data.img_scale || 100, 'number');
    $wrap.html(html);
  }

  function renderMultiUI($wrap, data) {
    var html = '<div class="aksrt-sme-toolbar">';
    html += '<button type="button" class="button aksrt-sme-add-col">添加栏目</button>';
    html += '</div><div class="aksrt-sme-cols">';
    (data.columns || []).forEach(function (col, i) {
      html += '<div class="aksrt-sme-col" data-index="' + i + '">';
      html += '<div class="aksrt-sme-card-head"><strong>栏目 #' + (i + 1) + '</strong>';
      html += ' <button type="button" class="button-link-delete aksrt-sme-del-col">删除栏目</button></div>';
      html += field('title', '栏目标题', col.title || '');
      html += field('icon', '图标 class', col.icon || '');
      html += field('link.url', '栏目链接', (col.link && col.link.url) || '');
      html += '<div class="aksrt-sme-items">';
      (col.items || []).forEach(function (item, j) {
        html += '<div class="aksrt-sme-item" data-j="' + j + '">';
        html += field('items.' + j + '.title', '链接标题', item.title || '');
        html += field('items.' + j + '.link.url', '链接 URL', (item.link && item.link.url) || '');
        html += field('items.' + j + '.icon', '图标', item.icon || '');
        html += '</div>';
      });
      html += '<button type="button" class="button aksrt-sme-add-item">添加链接</button>';
      html += '</div></div>';
    });
    html += '</div>';
    $wrap.html(html);
  }

  function readGraphic($wrap) {
    var data = graphicTemplate();
    data.arrangement = $wrap.find('[data-name="arrangement"]').val() || '';
    data.size = $wrap.find('[data-name="size"]').val() || 'md';
    data.img_scale = parseInt($wrap.find('[data-name="img_scale"]').val(), 10) || 100;
    data.items = [];
    $wrap.find('.aksrt-sme-card').each(function () {
      var $c = $(this);
      data.items.push({
        img: $c.find('[data-name="img"]').val() || '',
        title: $c.find('[data-name="title"]').val() || '',
        badge: $c.find('[data-name="badge"]').val() || '',
        badge_class: $c.find('[data-name="badge_class"]').val() || '',
        link: { url: $c.find('[data-name="link.url"]').val() || '', text: '', target: '' },
      });
    });
    return data;
  }

  function readMulti($wrap) {
    var data = { columns: [] };
    $wrap.find('.aksrt-sme-col').each(function () {
      var $col = $(this);
      var col = {
        title: $col.find('[data-name="title"]').first().val() || '',
        icon: $col.find('[data-name="icon"]').first().val() || '',
        img_icon: '',
        link: { url: $col.find('[data-name="link.url"]').first().val() || '', text: '', target: '' },
        items: [],
      };
      $col.find('.aksrt-sme-item').each(function () {
        var $it = $(this);
        col.items.push({
          title: $it.find('input[data-name$=".title"]').val() || '',
          icon: $it.find('input[data-name$=".icon"]').val() || '',
          img_icon: '',
          link: { url: $it.find('input[data-name$=".link.url"]').val() || '', text: '', target: '' },
        });
      });
      data.columns.push(col);
    });
    return data;
  }

  function enhanceItem($item) {
    if ($item.data('aksrtSme')) return;
    $item.data('aksrtSme', 1);

    var $graphicTa = $item.find('textarea[name*="[graphic_card_opts_json]"]');
    var $multiTa = $item.find('textarea[name*="[multi_column_links_opts_json]"]');
    var $type = $item.find('select[name*="[submenu_type]"]');
    if (!$graphicTa.length && !$multiTa.length) return;

    var $ui = $('<div class="aksrt-sme-ui" style="margin:8px 0;padding:10px;border:1px solid #dcdcde;background:#fff;border-radius:4px;"></div>');
    $graphicTa.closest('p').before($ui);

    function sync() {
      var type = $type.val();
      if (type === 'graphic_card') {
        $graphicTa.closest('p').hide();
        $multiTa.closest('p').hide();
        var g = parseJSON($graphicTa.val(), graphicTemplate());
        renderGraphicUI($ui, g);
        $ui.show();
      } else if (type === 'multi_column_links') {
        $graphicTa.closest('p').hide();
        $multiTa.closest('p').hide();
        var m = parseJSON($multiTa.val(), multiTemplate());
        renderMultiUI($ui, m);
        $ui.show();
      } else {
        $ui.hide().empty();
        $graphicTa.closest('p').show();
        $multiTa.closest('p').show();
      }
    }

    $type.on('change', sync);
    $ui.on('click', '.aksrt-sme-add-card', function (e) {
      e.preventDefault();
      var g = readGraphic($ui);
      g.items.push({ img: '', title: '', badge: '', badge_class: 'jb-red', link: { url: '', text: '', target: '' } });
      renderGraphicUI($ui, g);
    });
    $ui.on('click', '.aksrt-sme-del-card', function (e) {
      e.preventDefault();
      $(this).closest('.aksrt-sme-card').remove();
    });
    $ui.on('click', '.aksrt-sme-add-col', function (e) {
      e.preventDefault();
      var m = readMulti($ui);
      m.columns.push({
        title: '',
        icon: '',
        img_icon: '',
        link: { url: '', text: '', target: '' },
        items: [{ title: '', icon: '', img_icon: '', link: { url: '', text: '', target: '' } }],
      });
      renderMultiUI($ui, m);
    });
    $ui.on('click', '.aksrt-sme-del-col', function (e) {
      e.preventDefault();
      $(this).closest('.aksrt-sme-col').remove();
    });
    $ui.on('click', '.aksrt-sme-add-item', function (e) {
      e.preventDefault();
      var $col = $(this).closest('.aksrt-sme-col');
      var m = readMulti($ui);
      var idx = $col.index();
      if (m.columns[idx]) {
        m.columns[idx].items.push({ title: '', icon: '', img_icon: '', link: { url: '', text: '', target: '' } });
      }
      renderMultiUI($ui, m);
    });

    // Before save, write UI → textarea
    $('#update-nav-menu').on('submit.aksrtSme', function () {
      var type = $type.val();
      if (type === 'graphic_card') {
        $graphicTa.val(JSON.stringify(readGraphic($ui), null, 2));
      } else if (type === 'multi_column_links') {
        $multiTa.val(JSON.stringify(readMulti($ui), null, 2));
      }
    });

    // Hide raw JSON by default; toggle available via double-click title
    $graphicTa.closest('p').find('label').attr('title', '双击显示原始 JSON');
    sync();
  }

  function boot() {
    $('#menu-to-edit .menu-item').each(function () {
      enhanceItem($(this));
    });
  }

  
  $(document).on('click', '.aksrt-sme-pick-img', function (e) {
    e.preventDefault();
    var $btn = $(this);
    var name = $btn.data('for');
    var $input = $btn.closest('.aksrt-sme-field').find('input[data-name="' + name + '"]');
    if (typeof wp === 'undefined' || !wp.media) {
      window.alert('媒体库不可用');
      return;
    }
    var frame = wp.media({ title: '选择图片', button: { text: '使用此图' }, multiple: false, library: { type: 'image' } });
    frame.on('select', function () {
      var att = frame.state().get('selection').first().toJSON();
      if (att && att.url) $input.val(att.url).trigger('change');
    });
    frame.open();
  });

  $(boot);
  $(document).on('menu-item-added', function () {
    setTimeout(boot, 50);
  });
})(jQuery);