// Package templates provides embedded HTML templates for the web UI.
package templates

import (
	"embed"
	"html/template"
	"io"
	"sync"
)

//go:embed *.html
var files embed.FS

//nolint:gochecknoglobals // intentional lazy initialization cache
var (
	parsed   *template.Template
	parseOne sync.Once
)

// Get returns the parsed templates, parsing them on first call.
func Get() *template.Template {
	parseOne.Do(func() {
		parsed = template.Must(template.ParseFS(files, "*.html"))
	})

	return parsed
}

// Render renders a template by name to the given writer.
func Render(w io.Writer, name string, data any) error {
	return Get().ExecuteTemplate(w, name, data)
}