package gohtml

import (
	"context"
	"fmt"
	html "html/template"

	"gitoa.ru/go-4devs/templating"
	"gitoa.ru/go-4devs/templating/engine"
	gohtml "gitoa.ru/go-4devs/templating/gohtml/engine"
	"gitoa.ru/go-4devs/templating/loader"
)

const Name = gohtml.Name

var htm = gohtml.New()

func init() {
	templating.AddEngine(htm)
}

// Loader set new loader. This function is not thread-safe.
func Loader(in loader.Loader) {
	htm = htm.WithLoader(in)
}

func Must(template *html.Template, err error) {
	MustRegister(html.Must(template, err))
}

func MustRegister(template *html.Template) {
	if rerr := Register(template); rerr != nil {
		panic(rerr)
	}
}

func Register(template *html.Template) error {
	if err := htm.Add(context.Background(), engine.NewTemplate(template.Name(), template.Execute)); err != nil {
		return fmt.Errorf("gohtml loader:%w", err)
	}

	return nil
}