window.LOGIN_LOCALE_DATA = {
    "zh-tw": {
        "name": "繁體中文（台灣）",
        "fontFamily": "\"Microsoft JhengHei\",\"SimHei\", \"Apple LiGothic Medium\", \"STHeiti\"",
        "strings": {
            "page/title": "ArozOS - 登入",
            "login/description": "",
            "login/signinButton": "登入",
            "login/oauthButton": "透過 OAuth 2.0 登入",
            "login/ldapButton": "透過 LDAP 登入",
            "login/rememberMe": "記住我",
            "login/signUp": "註冊",
            "login/forgotPassword": "忘記密碼",
            "login/createNewSession": "建立新工作階段",
            "login/resumableSession": "可恢復的工作階段",
            "login/errorIncorrect": "錯誤。使用者名稱或密碼不正確。",
            "login/requestTimestamp": "請求時間戳記",
            "locale/language-default-text": "語言",
            "locale/browser-default": "Default",
            "login/introPrefix": "使用您的使用者名稱及密碼登入 ",
            "login/introSuffix": "",
            "login/redirectMessage": "5 秒後導向組織登入頁面...",
            "login/cancel": "取消",
            "page/titleSuffix": "登入"
        },
        "placeholder": {
            "Username": "使用者名稱",
            "Password": "密碼"
        }
    },
    "zh-hk": {
        "name": "繁體中文（香港）",
        "fontFamily": "\"Microsoft JhengHei\",\"SimHei\", \"Apple LiGothic Medium\", \"STHeiti\"",
        "strings": {
            "page/title": "ArozOS - 登入",
            "login/description": "",
            "login/signinButton": "登入",
            "login/oauthButton": "透過 OAuth 2.0 登入",
            "login/ldapButton": "透過 LDAP 登入",
            "login/rememberMe": "記住我",
            "login/signUp": "註冊",
            "login/forgotPassword": "忘記密碼",
            "login/createNewSession": "建立新工作階段",
            "login/resumableSession": "可恢復的工作階段",
            "login/errorIncorrect": "錯誤。使用者名稱或密碼不正確。",
            "login/requestTimestamp": "請求時間戳記",
            "locale/language-default-text": "語言",
            "locale/browser-default": "Default",
            "login/introPrefix": "使用您的使用者名稱及密碼登入 ",
            "login/introSuffix": "",
            "login/redirectMessage": "5 秒後重新導向至組織登入頁面...",
            "login/cancel": "取消",
            "page/titleSuffix": "登入"
        },
        "placeholder": {
            "Username": "使用者名稱",
            "Password": "密碼"
        }
    },
    "zh-cn": {
        "name": "简体中文",
        "fontFamily": "\"Microsoft YaHei\", \"SimHei\", \"STHeiti\"",
        "strings": {
            "page/title": "ArozOS - 登录",
            "login/description": "",
            "login/signinButton": "登录",
            "login/oauthButton": "通过 OAuth 2.0 登录",
            "login/ldapButton": "通过 LDAP 登录",
            "login/rememberMe": "记住我",
            "login/signUp": "注册",
            "login/forgotPassword": "忘记密码",
            "login/createNewSession": "创建新会话",
            "login/resumableSession": "可恢复的会话",
            "login/errorIncorrect": "错误。用户名或密码不正确。",
            "login/requestTimestamp": "请求时间戳",
            "locale/language-default-text": "语言",
            "locale/browser-default": "Default",
            "login/introPrefix": "使用您的用户名和密码登录 ",
            "login/introSuffix": "",
            "login/redirectMessage": "5 秒后重定向到组织登录页面...",
            "login/cancel": "取消",
            "page/titleSuffix": "登录"
        },
        "placeholder": {
            "Username": "用户名",
            "Password": "密码"
        }
    },
    "en-us": {
        "name": "English (US)",
        "fontFamily": "\"Segoe UI\", \"Helvetica Neue\", Arial, sans-serif",
        "strings": {
            "page/title": "ArozOS - Login",
            "login/description": "with your username and password",
            "login/signinButton": "Sign In",
            "login/oauthButton": "Sign In via OAuth 2.0",
            "login/ldapButton": "Sign In via LDAP",
            "login/rememberMe": "Remember Me",
            "login/signUp": "Sign Up",
            "login/forgotPassword": "Forgot Password",
            "login/createNewSession": "Create New Session",
            "login/resumableSession": "Resumable Session",
            "login/errorIncorrect": "Error. Incorrect username or password.",
            "login/requestTimestamp": "Request Timestamp",
            "locale/language-default-text": "Language",
            "locale/browser-default": "Default",
            "login/introPrefix": "Sign in to ",
            "login/introSuffix": " ",
            "login/redirectMessage": "Redirecting to organization sign-in page in 5 seconds...",
            "login/cancel": "Cancel",
            "page/titleSuffix": "Sign In"
        },
        "placeholder": {
            "Username": "Username",
            "Password": "Password"
        }
    },
    "ja-jp": {
        "name": "日本語",
        "fontFamily": "\"Hiragino Sans\", \"Hiragino Kaku Gothic ProN\", \"Noto Sans JP\", sans-serif",
        "strings": {
            "page/title": "ArozOS - ログイン",
            "login/description": "",
            "login/signinButton": "ログイン",
            "login/oauthButton": "OAuth 2.0でログイン",
            "login/ldapButton": "LDAPでログイン",
            "login/rememberMe": "ログイン状態を保持する",
            "login/signUp": "新規登録",
            "login/forgotPassword": "パスワードをお忘れですか？",
            "login/createNewSession": "新しいセッションを作成",
            "login/resumableSession": "復元可能なセッション",
            "login/errorIncorrect": "エラー。ユーザー名またはパスワードが正しくありません。",
            "login/requestTimestamp": "リクエストタイムスタンプ",
            "locale/language-default-text": "言語",
            "locale/browser-default": "Default",
            "login/introPrefix": "ユーザー名とパスワードでサインイン ",
            "login/introSuffix": "",
            "login/redirectMessage": "5 秒後に組織のサインインページへリダイレクトします...",
            "login/cancel": "キャンセル",
            "page/titleSuffix": "ログイン"
        },
        "placeholder": {
            "Username": "ユーザー名",
            "Password": "パスワード"
        }
    },
    "ko-kr": {
        "name": "한국어",
        "fontFamily": "\"Apple SD Gothic Neo\", \"Malgun Gothic\", \"Noto Sans KR\", sans-serif",
        "strings": {
            "page/title": "ArozOS - 로그인",
            "login/description": "",
            "login/signinButton": "로그인",
            "login/oauthButton": "OAuth 2.0으로 로그인",
            "login/ldapButton": "LDAP으로 로그인",
            "login/rememberMe": "로그인 상태 유지",
            "login/signUp": "회원가입",
            "login/forgotPassword": "비밀번호 찾기",
            "login/createNewSession": "새 세션 만들기",
            "login/resumableSession": "복원 가능한 세션",
            "login/errorIncorrect": "오류. 사용자 이름 또는 비밀번호가 올바르지 않습니다.",
            "login/requestTimestamp": "요청 타임스탬프",
            "locale/language-default-text": "언어",
            "locale/browser-default": "Default",
            "login/introPrefix": "사용자 이름과 비밀번호로 로그인 ",
            "login/introSuffix": "",
            "login/redirectMessage": "5초 후 조직 로그인 페이지로 이동합니다...",
            "login/cancel": "취소",
            "page/titleSuffix": "로그인"
        },
        "placeholder": {
            "Username": "사용자 이름",
            "Password": "비밀번호"
        }
    }
};

(function () {
    var rawData = window.LOGIN_LOCALE_DATA || null;
    var FALLBACK_LANG = 'en-us';
    var STORAGE_KEY = 'global_language';
    var readyQueue = [];
    var currentLanguage = null;
    var currentDataset = null;

    function getAvailableLocales() {
        return rawData || {};
    }

    function normalizeLanguageCandidate(candidate) {
        if (!candidate) {
            return null;
        }
        return candidate.replace(/_/g, '-').toLowerCase();
    }

    function matchLanguageCandidate(candidate) {
        if (!candidate || candidate === 'default') {
            return null;
        }
        var normalized = normalizeLanguageCandidate(candidate);
        if (!normalized) {
            return null;
        }
        var availableKeys = Object.keys(getAvailableLocales());
        for (var i = 0; i < availableKeys.length; i++) {
            if (availableKeys[i] === normalized) {
                return availableKeys[i];
            }
        }
        var primary = normalized.split('-')[0];
        for (var j = 0; j < availableKeys.length; j++) {
            if (availableKeys[j].split('-')[0] === primary) {
                return availableKeys[j];
            }
        }
        return null;
    }

    function getBrowserLanguage() {
        var browserLangs = [];
        if (navigator.languages && navigator.languages.length) {
            browserLangs = navigator.languages;
        } else if (navigator.language) {
            browserLangs = [navigator.language];
        }
        for (var i = 0; i < browserLangs.length; i++) {
            var match = matchLanguageCandidate(browserLangs[i]);
            if (match) {
                return match;
            }
        }
        return null;
    }

    function getQueryParam(name) {
        var regex = new RegExp('[?&]' + name + '=([^&]*)');
        var results = regex.exec(window.location.search);
        if (!results || results.length < 2) {
            return null;
        }
        try {
            return decodeURIComponent(results[1].replace(/\+/g, ' '));
        } catch (err) {
            return null;
        }
    }

    function getUrlLanguage() {
        var value = getQueryParam('lang');
        return value ? value.toLowerCase() : null;
    }

    function getStoredLanguage() {
        try {
            if (window.localStorage) {
                var stored = localStorage.getItem(STORAGE_KEY);
                return stored ? stored.toLowerCase() : null;
            }
        } catch (err) {
            // Ignore storage errors
        }
        return null;
    }

    function resolveLanguage() {
        var availableKeys = Object.keys(getAvailableLocales());
        if (!availableKeys.length) {
            return FALLBACK_LANG;
        }

        var overrideLang = getUrlLanguage();
        var overrideMatch = matchLanguageCandidate(overrideLang);
        if (overrideMatch) {
            return overrideMatch;
        }

        var storedLang = getStoredLanguage();
        if (storedLang && storedLang !== 'default') {
            var storedMatch = matchLanguageCandidate(storedLang);
            if (storedMatch) {
                return storedMatch;
            }
        }

        var browserLang = getBrowserLanguage();
        if (browserLang) {
            return browserLang;
        }

        for (var i = 0; i < availableKeys.length; i++) {
            if (availableKeys[i] === FALLBACK_LANG) {
                return FALLBACK_LANG;
            }
        }
        return availableKeys[0];
    }

    function ensureDataset() {
        var locales = getAvailableLocales();
        currentDataset = locales[currentLanguage] || null;
        if (!currentDataset) {
            var keys = Object.keys(locales);
            if (keys.length) {
                currentLanguage = keys[0];
                currentDataset = locales[currentLanguage];
            }
        }
    }

    function forEachNode(list, handler) {
        if (!list || !handler) {
            return;
        }
        for (var i = 0; i < list.length; i++) {
            handler(list[i]);
        }
    }

    function translateDocument() {
        if (!currentDataset) {
            return;
        }
        var strings = currentDataset.strings || {};
        var placeholders = currentDataset.placeholder || {};
        var titles = currentDataset.titles || {};

        forEachNode(document.querySelectorAll('[locale]'), function (el) {
            var key = el.getAttribute('locale');
            if (!key || strings[key] === undefined) {
                return;
            }
            if (el.tagName === 'INPUT' || el.tagName === 'TEXTAREA') {
                el.value = strings[key];
            } else {
                el.innerHTML = strings[key];
            }
        });

        forEachNode(document.querySelectorAll('[placeholder]'), function (el) {
            var placeholderKey = el.getAttribute('placeholder');
            if (placeholderKey && placeholders[placeholderKey] !== undefined) {
                el.setAttribute('placeholder', placeholders[placeholderKey]);
            }
        });

        forEachNode(document.querySelectorAll('[title]'), function (el) {
            var titleKey = el.getAttribute('title');
            if (titleKey && titles[titleKey] !== undefined) {
                el.setAttribute('title', titles[titleKey]);
            }
        });

        if (currentDataset.fontFamily && document.body) {
            document.body.style.fontFamily = currentDataset.fontFamily;
        }
        if (document.documentElement) {
            document.documentElement.setAttribute('lang', currentLanguage || 'en');
        }
        if (strings['page/title']) {
            document.title = strings['page/title'];
        }
    }

    function flushReadyQueue() {
        while (readyQueue.length) {
            var callback = readyQueue.shift();
            try {
                callback(currentDataset || {});
            } catch (err) {
                console.error('[LoginLocale] callback error', err);
            }
        }
    }

    function init() {
        if (currentDataset || !rawData) {
            if (!currentDataset) {
                flushReadyQueue();
            }
            return currentDataset;
        }
        currentLanguage = resolveLanguage();
        ensureDataset();

        var run = function () {
            translateDocument();
            flushReadyQueue();
            updateDropdownText();
        };

        if (document.readyState === 'loading') {
            var onDomReady = function () {
                document.removeEventListener('DOMContentLoaded', onDomReady);
                run();
            };
            document.addEventListener('DOMContentLoaded', onDomReady);
        } else {
            run();
        }
        return currentDataset;
    }

    function onReady(callback) {
        if (typeof callback !== 'function') {
            return;
        }
        if (currentDataset) {
            callback(currentDataset);
        } else {
            readyQueue.push(callback);
        }
    }

    function getString(key, fallback) {
        if (!currentDataset || !currentDataset.strings || currentDataset.strings[key] === undefined) {
            return fallback;
        }
        return currentDataset.strings[key];
    }

    function setLanguage(lang) {
        currentLanguage = lang;
        localStorage.setItem(STORAGE_KEY, lang);
        ensureDataset();
        translateDocument();
        updateDropdownText();
        if (window.updateHostnameAndTitle) {
            window.updateHostnameAndTitle();
        }
    }

    function updateDropdownText() {
        var text = 'Language';
        if (currentLanguage === 'default') {
            text = 'Browser Default';
        } else if (currentDataset && currentDataset.name) {
            text = currentDataset.name;
        }
        $('.selection.dropdown .text').text(text);
    }

    function getCurrentLanguage() {
        return currentLanguage;
    }

    function getAvailable() {
        return getAvailableLocales();
    }

    window.LoginLocale = {
        init: init,
        translateDocument: translateDocument,
        getString: getString,
        getCurrentLanguage: getCurrentLanguage,
        getAvailableLocales: getAvailable,
        onReady: onReady,
        setLanguage: setLanguage
    };
})();