package iso639

import (
	"fmt"
	"sort"
)

// GetLanguageNameForISO639Code tries get the language name for an ISO 639-1, ISO 639-2/B or ISO 639-2/T code
func GetLanguageNameForISO639Code(s string) (string, error) {
	languageName, err := GetLanguageNameForISO639_1Code(s)
	if err == nil {
		return languageName, nil
	}

	languageName, err = GetLanguageNameForISO639_2BCode(s)
	if err == nil {
		return languageName, nil
	}

	languageName, err = GetLanguageNameForISO639_2TCode(s)
	if err == nil {
		return languageName, nil
	}

	return "", fmt.Errorf("no language name found for ISO 639 code: %s", s)
}

func getAllKeysOfMap(m map[string]string) []string {
	keys := make([]string, 0, len(m))

	for key := range m {
		keys = append(keys, key)
	}

	sort.Strings(keys)

	return keys
}