package settings

import (
	"io"
	"log"
	"path/filepath"
	"testing"
)

// R-922: the clear marker's rule as a table — set only by a deliberate clear, kept while the address stays
// empty, dropped by a new address — and it survives a reload from disk (a clear the hub missed is pushed
// again by the next start: SyncOnStartup).
func TestR922_ClearedByRule(t *testing.T) {
	for _, tc := range []struct {
		name     string
		stored   *NotificationPrefs
		newEmail string
		want     bool
	}{
		{"never configured, empty save", &NotificationPrefs{}, "", false},
		{"nil stored prefs", nil, "", false},
		{"had an address, empty save = clear", &NotificationPrefs{Email: "a@example.hu"}, "", true},
		{"already cleared, empty save keeps it", &NotificationPrefs{EmailCleared: true}, "", true},
		{"cleared, new address drops it", &NotificationPrefs{EmailCleared: true}, "b@example.hu", false},
		{"address changed", &NotificationPrefs{Email: "a@example.hu"}, "b@example.hu", false},
	} {
		if got := tc.stored.ClearedBy(tc.newEmail); got != tc.want {
			t.Errorf("%s: ClearedBy(%q) = %v, want %v", tc.name, tc.newEmail, got, tc.want)
		}
	}
}

func TestR922_MarkerPersistsAndDrivesStartupSync(t *testing.T) {
	path := filepath.Join(t.TempDir(), "settings.json")
	lg := log.New(io.Discard, "", 0)
	s, err := Load(path, lg)
	if err != nil {
		t.Fatal(err)
	}
	if s.GetNotificationPrefs().SyncOnStartup() {
		t.Fatal("a never-configured box would push on startup")
	}
	if err := s.SetNotificationPrefs(&NotificationPrefs{EmailCleared: true, CooldownHours: 6}); err != nil {
		t.Fatal(err)
	}
	s2, err := Load(path, lg)
	if err != nil {
		t.Fatal(err)
	}
	p := s2.GetNotificationPrefs()
	if !p.EmailCleared {
		t.Fatal("the clear marker did not survive a reload")
	}
	if !p.SyncOnStartup() {
		t.Fatal("a cleared box does not push its clear on startup — a clear the hub missed would never reach it")
	}
}