// ==================== 蝉知全站自动翻译（谷歌内核 · 无需JSON · 无需配置）====================
(function() {
    window.addEventListener('load', function() {
        initGoogleTranslate();
        bindTranslateBtn();
    });

    // 初始化谷歌自动翻译
    function initGoogleTranslate() {
        if (document.getElementById('google-translate-script')) return;
        
        const script = document.createElement('script');
        script.id = 'google-translate-script';
        script.src = 'https://translate.google.com/translate_a/element.js?cb=googleTranslateElementInit';
        document.body.appendChild(script);

        window.googleTranslateElementInit = function() {
            new window.google.translate.TranslateElement({
                pageLanguage: 'zh-CN',
                includedLanguages: 'en,zh-CN',
                layout: google.translate.TranslateElement.InlineLayout.SIMPLE,
                autoDisplay: false
            }, 'google_translate_element');
        };
    }

    // 绑定你的 EN/CN 按钮
    function bindTranslateBtn() {
        const btn = document.querySelector('li[class*="numcss7"] a');
        if (!btn) return;

        let isEnglish = false;

        btn.addEventListener('click', function(e) {
            e.preventDefault();

            const translateFrame = document.querySelector('.goog-te-combo');
            if (!translateFrame) {
                alert('翻译加载中，请稍候重试...');
                return;
            }

            isEnglish = !isEnglish;
            if (isEnglish) {
                translateFrame.value = 'en';
                this.textContent = '中文';
            } else {
                translateFrame.value = 'zh-CN';
                this.textContent = 'EN';
            }

            translateFrame.dispatchEvent(new Event('change'));
            localStorage.setItem('preferred_lang', isEnglish ? 'en' : 'zh-CN');
        });

        // 页面加载恢复语言
        const saved = localStorage.getItem('preferred_lang');
        if (saved === 'en') {
            setTimeout(() => {
                const translateFrame = document.querySelector('.goog-te-combo');
                if (translateFrame) {
                    translateFrame.value = 'en';
                    translateFrame.dispatchEvent(new Event('change'));
                    btn.textContent = '中文';
                    isEnglish = true;
                }
            }, 1000);
        }
    }
})();