package render

import (
	"bytes"

	"github.com/yuin/goldmark"
	highlighting "github.com/yuin/goldmark-highlighting/v2"
	"github.com/yuin/goldmark/extension"
	"github.com/yuin/goldmark/parser"
	"github.com/yuin/goldmark/renderer/html"
)

var md goldmark.Markdown

func init() {
	md = goldmark.New(
		goldmark.WithExtensions(
			extension.GFM,
			highlighting.NewHighlighting(
				highlighting.WithStyle("monokai"),
			),
		),
		goldmark.WithParserOptions(
			parser.WithAutoHeadingID(),
		),
		goldmark.WithRendererOptions(
			html.WithUnsafe(),
		),
	)
}

func Markdown(src []byte) ([]byte, error) {
	var buf bytes.Buffer
	if err := md.Convert(src, &buf); err != nil {
		return nil, err
	}
	return buf.Bytes(), nil
}