package static

import (
	"bytes"
	_ "embed"
	"fmt"
	"html/template"
	"io"

	"github.com/rs/zerolog/log"
)

type Context = map[string]any

var (
	templates = make(map[string]*template.Template)

	//go:embed templates/base.tmpl
	baseTmpl string
	Base     = "base"

	//go:embed templates/new.tmpl
	newTmpl string
	New     = "new"
)

func init() {
	templates[Base] = template.Must(template.New("").Funcs(funcMap).Parse(baseTmpl))
	templates[New] = template.Must(template.New("").Funcs(funcMap).Parse(newTmpl))
}

func Tmpl(w io.Writer, name string, ctx any) error {
	if tmpl, ok := templates[name]; ok {
		return tmpl.Execute(w, ctx)
	}
	return fmt.Errorf("unknown template %q", name)
}

var funcMap = template.FuncMap{
	"tmpl": func(name string, ctx any) template.HTML {
		var buf bytes.Buffer
		err := Tmpl(&buf, name, ctx)
		if err != nil {
			log.Err(err).Msg("")
			return ""
		}
		return template.HTML(buf.String())
	},
}