package host

import (
	"bytes"
	"os"
	"path/filepath"
	"testing"
)

// 6b-N2, adopt's half: repairing the system units keeps an enabled control
// unit when host.env cannot be parsed. A flag-off one is still restored to
// main's bytes (TestClaimBadUnitSettingsStillRepairSystemUnits).
func TestPlan9AAdoptKeepsEnabledControlUnitOnHostEnvError(t *testing.T) {
	for _, env := range plan9aOddHostEnv {
		t.Run(env, func(t *testing.T) {
			etc := t.TempDir()
			plan9aWriteFile(t, filepath.Join(etc, "carlos", "host.env"), []byte(env))
			installed := plan9aEnabledControl(t)
			live := filepath.Join(etc, "systemd", "system", claimControlUnit)
			plan9aWriteFile(t, live, installed)
			ctl := func(args ...string) (string, error) { return "", nil }
			probe := func(args ...string) (string, error) { return "inactive\n", nil }
			ensureSystemUnits(etc, filepath.Join(t.TempDir(), "lock"), ctl, probe, t.Logf)
			if got, _ := os.ReadFile(live); !bytes.Equal(got, installed) {
				t.Fatalf("adopt flipped the enabled control unit:\n%s", got)
			}
			for _, name := range systemUnitFiles {
				if _, err := os.Stat(filepath.Join(etc, "systemd", "system", name)); err != nil {
					t.Fatal(err)
				}
			}
		})
	}
}