const { sprintf } = require('sprintf-js');

let codeToLanguageE_ = {};
codeToLanguageE_["aa"] = "Afar";
codeToLanguageE_["ab"] = "Abkhazian";
codeToLanguageE_["af"] = "Afrikaans";
codeToLanguageE_["am"] = "Amharic";
codeToLanguageE_["an"] = "Aragonese";
codeToLanguageE_["ar"] = "Arabic";
codeToLanguageE_["as"] = "Assamese";
codeToLanguageE_["ay"] = "Aymara";
codeToLanguageE_["az"] = "Azerbaijani";
codeToLanguageE_["ba"] = "Bashkir";
codeToLanguageE_["be"] = "Byelorussian";
codeToLanguageE_["bg"] = "Bulgarian";
codeToLanguageE_["bh"] = "Bihari";
codeToLanguageE_["bi"] = "Bislama";
codeToLanguageE_["bn"] = "Bangla";
codeToLanguageE_["bo"] = "Tibetan";
codeToLanguageE_["br"] = "Breton";
codeToLanguageE_["ca"] = "Catalan";
codeToLanguageE_["co"] = "Corsican";
codeToLanguageE_["cs"] = "Czech";
codeToLanguageE_["cy"] = "Welsh";
codeToLanguageE_["da"] = "Danish";
codeToLanguageE_["de"] = "German";
codeToLanguageE_["dz"] = "Bhutani";
codeToLanguageE_["el"] = "Greek";
codeToLanguageE_["en"] = "English";
codeToLanguageE_["eo"] = "Esperanto";
codeToLanguageE_["es"] = "Spanish";
codeToLanguageE_["et"] = "Estonian";
codeToLanguageE_["eu"] = "Basque";
codeToLanguageE_["fa"] = "Persian";
codeToLanguageE_["fi"] = "Finnish";
codeToLanguageE_["fj"] = "Fiji";
codeToLanguageE_["fo"] = "Faroese";
codeToLanguageE_["fr"] = "French";
codeToLanguageE_["fy"] = "Frisian";
codeToLanguageE_["ga"] = "Irish";
codeToLanguageE_["gd"] = "Gaelic";
codeToLanguageE_["gl"] = "Galician";
codeToLanguageE_["gn"] = "Guarani";
codeToLanguageE_["gu"] = "Gujarati";
codeToLanguageE_["ha"] = "Hausa";
codeToLanguageE_["he"] = "Hebrew";
codeToLanguageE_["hi"] = "Hindi";
codeToLanguageE_["hr"] = "Croatian";
codeToLanguageE_["hu"] = "Hungarian";
codeToLanguageE_["hy"] = "Armenian";
codeToLanguageE_["ia"] = "Interlingua";
codeToLanguageE_["id"] = "Indonesian";
codeToLanguageE_["ie"] = "Interlingue";
codeToLanguageE_["ik"] = "Inupiak";
codeToLanguageE_["is"] = "Icelandic";
codeToLanguageE_["it"] = "Italian";
codeToLanguageE_["iu"] = "Inuktitut";
codeToLanguageE_["ja"] = "Japanese";
codeToLanguageE_["jw"] = "Javanese";
codeToLanguageE_["ka"] = "Georgian";
codeToLanguageE_["kk"] = "Kazakh";
codeToLanguageE_["kl"] = "Greenlandic";
codeToLanguageE_["km"] = "Cambodian";
codeToLanguageE_["kn"] = "Kannada";
codeToLanguageE_["ko"] = "Korean";
codeToLanguageE_["ks"] = "Kashmiri";
codeToLanguageE_["ku"] = "Kurdish";
codeToLanguageE_["ky"] = "Kirghiz";
codeToLanguageE_["la"] = "Latin";
codeToLanguageE_["ln"] = "Lingala";
codeToLanguageE_["lo"] = "Laothian";
codeToLanguageE_["lt"] = "Lithuanian";
codeToLanguageE_["lv"] = "Lettish";
codeToLanguageE_["mg"] = "Malagasy";
codeToLanguageE_["mi"] = "Maori";
codeToLanguageE_["mk"] = "Macedonian";
codeToLanguageE_["ml"] = "Malayalam";
codeToLanguageE_["mn"] = "Mongolian";
codeToLanguageE_["mo"] = "Moldavian";
codeToLanguageE_["mr"] = "Marathi";
codeToLanguageE_["ms"] = "Malay";
codeToLanguageE_["mt"] = "Maltese";
codeToLanguageE_["my"] = "Burmese";
codeToLanguageE_["na"] = "Nauru";
codeToLanguageE_["ne"] = "Nepali";
codeToLanguageE_["nl"] = "Dutch";
codeToLanguageE_["no"] = "Norwegian";
codeToLanguageE_["oc"] = "Occitan";
codeToLanguageE_["om"] = "Oromo";
codeToLanguageE_["or"] = "Oriya";
codeToLanguageE_["pa"] = "Punjabi";
codeToLanguageE_["pl"] = "Polish";
codeToLanguageE_["ps"] = "Pushto";
codeToLanguageE_["pt"] = "Portuguese";
codeToLanguageE_["qu"] = "Quechua";
codeToLanguageE_["rm"] = "Rhaeto-Romance";
codeToLanguageE_["rn"] = "Kirundi";
codeToLanguageE_["ro"] = "Romanian";
codeToLanguageE_["ru"] = "Russian";
codeToLanguageE_["rw"] = "Kinyarwanda";
codeToLanguageE_["sa"] = "Sanskrit";
codeToLanguageE_["sd"] = "Sindhi";
codeToLanguageE_["sg"] = "Sangho";
codeToLanguageE_["sh"] = "Serbo-Croatian";
codeToLanguageE_["si"] = "Sinhalese";
codeToLanguageE_["sk"] = "Slovak";
codeToLanguageE_["sl"] = "Slovenian";
codeToLanguageE_["sm"] = "Samoan";
codeToLanguageE_["sn"] = "Shona";
codeToLanguageE_["so"] = "Somali";
codeToLanguageE_["sq"] = "Albanian";
codeToLanguageE_["sr"] = "Serbian";
codeToLanguageE_["ss"] = "Siswati";
codeToLanguageE_["st"] = "Sesotho";
codeToLanguageE_["su"] = "Sundanese";
codeToLanguageE_["sv"] = "Swedish";
codeToLanguageE_["sw"] = "Swahili";
codeToLanguageE_["ta"] = "Tamil";
codeToLanguageE_["te"] = "Telugu";
codeToLanguageE_["tg"] = "Tajik";
codeToLanguageE_["th"] = "Thai";
codeToLanguageE_["ti"] = "Tigrinya";
codeToLanguageE_["tk"] = "Turkmen";
codeToLanguageE_["tl"] = "Tagalog";
codeToLanguageE_["tn"] = "Setswana";
codeToLanguageE_["to"] = "Tonga";
codeToLanguageE_["tr"] = "Turkish";
codeToLanguageE_["ts"] = "Tsonga";
codeToLanguageE_["tt"] = "Tatar";
codeToLanguageE_["tw"] = "Twi";
codeToLanguageE_["ug"] = "Uighur";
codeToLanguageE_["uk"] = "Ukrainian";
codeToLanguageE_["ur"] = "Urdu";
codeToLanguageE_["uz"] = "Uzbek";
codeToLanguageE_["vi"] = "Vietnamese";
codeToLanguageE_["vo"] = "Volapuk";
codeToLanguageE_["wo"] = "Wolof";
codeToLanguageE_["xh"] = "Xhosa";
codeToLanguageE_["yi"] = "Yiddish";
codeToLanguageE_["yo"] = "Yoruba";
codeToLanguageE_["za"] = "Zhuang";
codeToLanguageE_["zh"] = "Chinese";
codeToLanguageE_["zu"] = "Zulu";

let codeToLanguage_ = {};
codeToLanguage_["an"] = "Aragonés";
codeToLanguage_["da"] = "Dansk";
codeToLanguage_["de"] = "Deutsch";
codeToLanguage_["en"] = "English";
codeToLanguage_["es"] = "Español";
codeToLanguage_["fr"] = "Français";
codeToLanguage_["he"] = "עיברית";
codeToLanguage_["it"] = "Italiano";
codeToLanguage_["lt"] = "Lietuvių kalba";
codeToLanguage_["nl"] = "Nederlands";
codeToLanguage_["pl"] = "Polski";
codeToLanguage_["pt"] = "Português";
codeToLanguage_["ru"] = "Русский";
codeToLanguage_["sk"] = "Slovenčina";
codeToLanguage_["sq"] = "Shqip";
codeToLanguage_["sr"] = "српски језик";
codeToLanguage_["tr"] = "Türkçe";
codeToLanguage_["ja"] = "日本語";
codeToLanguage_["ko"] = "한국말";
codeToLanguage_["sv"] = "Svenska";
codeToLanguage_["el"] = "ελληνικά";
codeToLanguage_["zh"] = "中文";
codeToLanguage_["ro"] = "Română";
codeToLanguage_["et"] = "Eesti Keel";
codeToLanguage_["vi"] = "Tiếng Việt";
codeToLanguage_["hu"] = "Magyar";

let codeToCountry_ = {};
codeToCountry_["BR"] = "Brasil";
codeToCountry_["CN"] = "中国";

let supportedLocales_ = null;

let loadedLocales_ = {};

const defaultLocale_ = 'en_GB';

let currentLocale_ = defaultLocale_;

function defaultLocale() {
	return defaultLocale_;
}

function supportedLocales() {
	if (!supportedLocales_) supportedLocales_ = require('../locales/index.js').locales;

	let output = [];
	for (let n in supportedLocales_) {
		if (!supportedLocales_.hasOwnProperty(n)) continue;
		output.push(n);
	}
	return output;
}

function supportedLocalesToLanguages() {
	const locales = supportedLocales();
	let output = {};
	for (let i = 0; i < locales.length; i++) {
		const locale = locales[i];
		output[locale] = countryDisplayName(locale);
	}
	return output;
}

function closestSupportedLocale(canonicalName, defaultToEnglish = true) {
	const locales = supportedLocales();
	if (locales.indexOf(canonicalName) >= 0) return canonicalName;

	const requiredLanguage = languageCodeOnly(canonicalName).toLowerCase();

	for (let i = 0; i < locales.length; i++) {
		const locale = locales[i];
		const language = locale.split('_')[0];
		if (requiredLanguage == language) return locale;
	}

	return defaultToEnglish ? 'en_GB' : null;
}

function countryName(countryCode) {
	return codeToCountry_[countryCode] ? codeToCountry_[countryCode] : '';
}

function languageNameInEnglish(languageCode) {
	return codeToLanguageE_[languageCode] ? codeToLanguageE_[languageCode] : '';
}

function languageName(languageCode, defaultToEnglish = true) {
	if (codeToLanguage_[languageCode]) return codeToLanguage_[languageCode];
	if (defaultToEnglish) return languageNameInEnglish(languageCode)
	return '';
}

function languageCodeOnly(canonicalName) {
	if (canonicalName.length < 2) return canonicalName;
	return canonicalName.substr(0, 2);
}


function countryCodeOnly(canonicalName) {
	if (canonicalName.length <= 2) return "";
	return canonicalName.substr(3);
}

function countryDisplayName(canonicalName) {
	const languageCode = languageCodeOnly(canonicalName);
	const countryCode = countryCodeOnly(canonicalName);

	let output = languageName(languageCode);

	let extraString;

	if (countryCode != "") {
		if (languageCode == "zh" && countryCode == "CN") {
			extraString = "简体"; // "Simplified" in "Simplified Chinese"
		} else {
			extraString = countryName(countryCode);
		}
	}

	if (languageCode == "zh" && (countryCode == "" || countryCode == "TW")) extraString = "繁體"; // "Traditional" in "Traditional Chinese"

	if (extraString != "") output += " (" + extraString + ")";

	return output;
}

function localeStrings(canonicalName) {
	const locale = closestSupportedLocale(canonicalName);
	
	if (loadedLocales_[locale]) return loadedLocales_[locale];

	loadedLocales_[locale] = Object.assign({}, supportedLocales_[locale]); 

	return loadedLocales_[locale];
}

function setLocale(canonicalName) {
	if (currentLocale_ == canonicalName) return;
	currentLocale_ = closestSupportedLocale(canonicalName);
}

function languageCode() {
	return languageCodeOnly(currentLocale_);
}

function _(s, ...args) {
	let strings = localeStrings(currentLocale_);
	let result = strings[s];
	if (result === '' || result === undefined) result = s;
	return sprintf(result, ...args);
}

module.exports = { _, supportedLocales, localeStrings, setLocale, supportedLocalesToLanguages, defaultLocale, closestSupportedLocale, languageCode };