package settings

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

// i18n (v0.247.0): the household language. Default Hungarian; only a supported value is stored; the
// choice survives a restart (it is what the hub report and every page read).
func TestLanguageSetting(t *testing.T) {
	lg := log.New(io.Discard, "", 0)
	p := filepath.Join(t.TempDir(), "settings.json")
	s, err := Load(p, lg)
	if err != nil {
		t.Fatal(err)
	}
	if got := s.GetLanguage(); got != "hu" {
		t.Fatalf("a box that never chose must read Hungarian, got %q", got)
	}
	if err := s.SetLanguage("de"); err == nil || s.GetLanguage() != "hu" {
		t.Fatalf("unsupported language must be refused and change nothing (err=%v, lang=%q)", err, s.GetLanguage())
	}
	if err := s.SetLanguage("en"); err != nil {
		t.Fatal(err)
	}
	again, err := Load(p, lg)
	if err != nil {
		t.Fatal(err)
	}
	if got := again.GetLanguage(); got != "en" {
		t.Fatalf("language did not survive a reload: %q", got)
	}
}