package handlers

import (
	"net/http"

	"git.haelnorr.com/h/golib/hws"
	"git.haelnorr.com/h/oslstats/internal/respond"
	"git.haelnorr.com/h/oslstats/internal/throw"
)

// StaticFS handles requests for static files, without allowing access to the
// directory viewer and returning 404 if an exact file is not found
func StaticFS(staticFS *http.FileSystem, server *hws.Server) http.Handler {
	// Create the file server once, not on every request
	fs, err := hws.SafeFileServer(staticFS)
	if err != nil {
		// If we can't create the file server, return a handler that always errors
		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
			throw.InternalServiceError(server, w, r, "An error occurred trying to load the file system", err)
		})
	}

	return http.HandlerFunc(
		func(w http.ResponseWriter, r *http.Request) {
			respond.ContentType(w, r)
			fs.ServeHTTP(w, r)
		},
	)
}