// Package render wires Go html/template page shells into Echo. The server emits
// the page shell and declares web components; the components fetch their own
// data (AGENT.md §1.1, §2).
package render

import (
	"html/template"
	"io"
	"path/filepath"

	"github.com/labstack/echo/v4"
)

// Templates implements echo.Renderer over the templates in a directory.
type Templates struct {
	tmpl *template.Template
}

// New parses every *.html file in dir.
func New(dir string) (*Templates, error) {
	t, err := template.ParseGlob(filepath.Join(dir, "*.html"))
	if err != nil {
		return nil, err
	}
	return &Templates{tmpl: t}, nil
}

// Render satisfies echo.Renderer.
func (t *Templates) Render(w io.Writer, name string, data any, _ echo.Context) error {
	return t.tmpl.ExecuteTemplate(w, name, data)
}