package dbreads

import (
	"fmt"

	"github.com/carlosframework/platform/internal/provision"
)

// ClassRefusal is the class rail as a sentence, or "" for an
// activator-managed exec instance: the only class whose database the
// platform replicates. It moved here from the console's db door so the door
// and the box's identity bracket refuse on one rule (spec §8.2); the
// sentences are the door's, unchanged.
func ClassRefusal(rec provision.Record) string {
	if k := rec.Kind; k != "" && k != "instance" {
		return fmt.Sprintf("%s is a %s route. The platform keeps a database copy only for instances.", rec.Host, k)
	}
	if rec.Addr != "" || len(rec.Addrs) > 0 {
		return fmt.Sprintf("%s is served from its own address, so the platform does not manage its database.", rec.Host)
	}
	if !rec.HibernateOrDefault() {
		return fmt.Sprintf("%s does not sleep, so the platform does not keep a copy of its database.", rec.Host)
	}
	return ""
}