import type { MarkdownConfig } from '@lezer/markdown';
import { styleTags, Tag, tags } from '@lezer/highlight';

export const tagTag = Tag.define('tag');
export const tag: MarkdownConfig = {
    defineNodes: [
      'Tag',
      'TagMeta',
    ],
    parseInline: [{
        name: 'Tag',
        parse(cx, next, pos)
        {
            //35 == '#'
            if (cx.slice(pos, pos + 1).charCodeAt(0) !== 35 || String.fromCharCode(next).trim() === '') return -1;

            const end = cx.slice(pos, cx.end).search(/\s/);
            return cx.addElement(cx.elt('Tag', pos, end === -1 ? cx.end : end, [ cx.elt('TagMeta', pos, pos + 1) ]));
        },
    }],
    props: [
        styleTags({
            'Tag': tagTag,
            'TagMeta': tags.meta,
        })
    ]
};