package host

import (
	"fmt"
	"os"
	"path/filepath"

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

// A bound constrains replacement only while a certified copy meeting it is
// available. The executor itself remains runnable so it can repair the box.
func rootFloorAvailable(opt string, bound *moves.Floor, seeds bool, candidate string) bool {
	if bound == nil {
		return false
	}
	for _, path := range []string{systemBinaryPath(opt), systemPrevPath(opt), filepath.Join(systemRootDir(opt), "staging", "carlos"), candidate} {
		if path == "" {
			continue
		}
		b, err := readRootFloorBinary(opt, path)
		if seeds {
			b = b.forSeeds()
		}
		if err == nil && b.supports(bound) {
			return true
		}
	}
	return false
}
func (a *systemApplier) activationFloor(floor *moves.Floor, seeds bool) *moves.Floor {
	if _, required, err := a.rootMoves.read(); err != nil || !required || floor == nil {
		return floor
	}
	if rootFloorAvailable(a.optDir, floor, seeds, "") {
		return floor
	}
	if !a.floorAlerted {
		rootFloorAlert()
		a.floorAlerted = true
	}
	return nil
}

func rootFloorAlert() { fmt.Fprintln(os.Stderr, "<1>"+errRootFloorHistory.Error()) }