window.cookies = {
    Read: function (name) {
        try {
            const match = document.cookie.match(new RegExp('(^| )' + name + '=([^;]+)'));
            if (match) return decodeURIComponent(match[2]);
            return '';
        } catch (e) {
            return '';
        }
    },
    Write: function (name, value, expiresIso) {
        try {
            var expires = '';
            if (expiresIso) {
                expires = '; expires=' + new Date(expiresIso).toUTCString();
            }
            document.cookie = name + '=' + encodeURIComponent(value) + expires + '; path=/';
        } catch (e) { }
    },
    Delete: function (cookie_name) {
        document.cookie = cookie_name + "=; expires=Thu, 01 Jan 1970 00:00:00 UTC; path=/;";
    }
};

window.ajax = {
    Post: async function (url, data) {
        try {
            const res = await fetch(url, {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                credentials: 'include',
                body: JSON.stringify(data)
            });
            const text = await res.text();
            try {
                return JSON.parse(text);
            } catch {
                return { success: res.ok, message: text };
            }
        } catch (err) {
            return { success: false, message: err?.toString() ?? 'network error' };
        }
    }
};

window.getBrowserLanguage = function () {
    try {
        return (navigator.languages && navigator.languages[0]) || navigator.language || navigator.userLanguage || '';
    } catch (e) {
        return '';
    }
};

window.setHtmlLang = function (lang) {
    try {
        if (document && document.documentElement) document.documentElement.lang = lang || '';
    } catch (e) { }
};