import {visit} from 'unist-util-visit';
import {u} from 'unist-builder'

function createHeadingNode(depth, text) {
  return {
    type: 'heading',
    depth: depth,
    children: [{ type: 'text', value: text }],
  };
}

const plugin = (options) => {
  const transformer = async (ast) => {
    let hId = null;
    let hContent = null;
    let offset = 0;
    visit(ast, 'element', (node, index, parent) => {
      if(node && node.tagName == "admonition") {
        let headingNode = u('heading', { depth: 4 }, [
          u('text', 'New Heading')
        ]);
        parent.children.splice(index + offset, 0, {type: 'element', tagName: 'h4', children:[{type: 'text', value: 'テスト'}]});
        offset++;
        //        if (/^h[3-6]$/.test(node.tagName) && node.properties && node.properties.id) {
            // h3～h6のタグを見つけたら
            /*
            hId = node.properties.id;
            hContent = node.children && node.children[0] ? node.children[0].value : '';
            // h3～h6タグの隣にあるdivタグを探す
            const nextNode = parent.children[index + 1];
            if (nextNode && nextNode.tagName === 'admonition') {
              // 該当のdiv要素を見つけたらHタグの内容とline-5の#以降の文字列が一致した場合
                const contentAfterHash = nextNode.properties.title ? nextNode.properties.title.replace(/^#+/, '').trim() : '';

                if (contentAfterHash === hContent.trim()) {
                    // Hタグのidを取得しそれをdivのidに設定
                    nextNode.properties.id = hId;
                    // Hタグを削除
                    parent.children.splice(index, 1);
                }
            }*/
//          }
      }
    });
  };
  return transformer;
};

export default plugin;