// Package webui embeds the compiled React bundle produced by `make build`.
//
// The `dist` directory is populated by the build pipeline (npm run build copies
// frontend/dist into backend/webui/dist). A placeholder index.html is checked
// in so the backend always compiles and runs, even in a fresh checkout where
// the frontend has not been built yet.
package webui

import (
	"embed"
	"io/fs"
)

//go:embed all:dist
var assets embed.FS

// FS returns the root of the embedded bundle, or nil when the placeholder build
// is still in place and no real frontend bundle has been compiled.
func FS() fs.FS {
	sub, err := fs.Sub(assets, "dist")
	if err != nil {
		return nil
	}
	if _, err := fs.Stat(sub, "index.html"); err != nil {
		return nil
	}
	return sub
}

// Assets exposes the raw embedded filesystem, including the dist prefix.
func Assets() fs.FS { return assets }