package locale_test

import (
	"strings"
	"testing"

	"gitgud.io/mike/mpv-manager/internal/assets"
	"gitgud.io/mike/mpv-manager/pkg/locale"
)

func TestEmbeddedLocaleDataIntegrity(t *testing.T) {
	entries, err := assets.ReadLocales()
	if err != nil {
		t.Fatal(err)
	}

	byCode := make(map[string][]locale.LocaleEntry)
	locales := make(map[string]string)
	for _, entry := range entries {
		code := locale.CanonicalLanguageCode(entry)
		if code == "" {
			t.Errorf("language %q has no selectable language code", entry.LanguageName)
			continue
		}
		byCode[code] = append(byCode[code], entry)
		for _, region := range entry.Regions {
			localeID := strings.ToLower(strings.TrimSpace(region.Locale))
			if localeID == "" {
				t.Errorf("language %q has an empty regional locale", entry.LanguageName)
				continue
			}
			if previous, exists := locales[localeID]; exists {
				t.Errorf("locale %q is duplicated by %q and %q", region.Locale, previous, entry.LanguageName)
			}
			locales[localeID] = entry.LanguageName
			if prefix := strings.SplitN(localeID, "-", 2)[0]; prefix != code {
				t.Errorf("locale %q does not use canonical language code %q", region.Locale, code)
			}
			if strings.TrimSpace(region.CountryCode) == "" || strings.TrimSpace(region.CountryName) == "" || strings.TrimSpace(region.Flag) == "" {
				t.Errorf("locale %q has incomplete regional metadata", region.Locale)
			}
		}
	}

	for _, code := range locale.GetCommonLanguageCodes() {
		if len(byCode[code]) == 0 {
			t.Errorf("common language code %q has no embedded locale entry", code)
		}
	}

	assertLocale := func(id, country, flag string) {
		t.Helper()
		entry, region := locale.FindByLocale(id, entries)
		if entry == nil || region == nil {
			t.Fatalf("corrected locale %q is missing", id)
		}
		if region.CountryCode != country || region.Flag != flag {
			t.Errorf("locale %q metadata = %s/%s, want %s/%s", id, region.CountryCode, region.Flag, country, flag)
		}
	}
	assertLocale("pa-IN", "IN", "🇮🇳")
	assertLocale("es-419", "419", "🌎")
	assertLocale("fil-PH", "PH", "🇵🇭")
	assertLocale("te-IN", "IN", "🇮🇳")
}