package web

import (
	"embed"
	"io/fs"
)

// DistFS holds the production SPA build (npm run build + precompress).
// Build scripts must materialize web/dist before `go build`; the directory is
// gitignored except dist/.gitkeep, which keeps the pattern satisfiable on
// fresh checkouts. LookupDist returns false until a real build lands, so
// callers fall back to disk-only mode.
//
//go:embed all:dist
var DistFS embed.FS

// LookupDist returns the embedded dist subtree when the build populated it.
func LookupDist() (fs.FS, bool) {
	sub, err := fs.Sub(DistFS, "dist")
	if err != nil {
		return nil, false
	}
	if _, err := fs.Stat(sub, "index.html"); err != nil {
		return nil, false
	}
	return sub, true
}