package tailwind

import (
	"github.com/yuin/goldmark/ast"
	"github.com/yuin/goldmark/renderer"
	"github.com/yuin/goldmark/renderer/html"
	"github.com/yuin/goldmark/util"
)

type CustomLinkRenderer struct {
	html.Config
}

func NewCustomLinkRenderer(opts ...html.Option) renderer.NodeRenderer {
	r := &CustomLinkRenderer{
		Config: html.NewConfig(),
	}
	for _, opt := range opts {
		opt.SetHTMLOption(&r.Config)
	}
	return r
}

func (r *CustomLinkRenderer) renderLink(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
	n := node.(*ast.Link)
	if entering {
		_, _ = w.WriteString("<a href=\"")
		if r.Unsafe || !html.IsDangerousURL(n.Destination) {
			_, _ = w.Write(util.EscapeHTML(util.URLEscape(n.Destination, true)))
		}
		_, _ = w.WriteString(`"`)
		if n.Title != nil {
			_, _ = w.WriteString(` title="`)
			_, _ = w.Write(util.EscapeHTML(n.Title))
			_, _ = w.WriteString(`"`)
		}
		if n.Attributes() != nil {
			html.RenderAttributes(w, n, nil)
		}
		_, _ = w.WriteString(">")
	} else {
		_, _ = w.WriteString("</a>")
	}
	return ast.WalkContinue, nil
}

func (r *CustomLinkRenderer) RegisterFuncs(reg renderer.NodeRendererFuncRegisterer) {
	reg.Register(ast.KindLink, r.renderLink)
}