console.log('[XAI Background] ✅ Service worker started');

// ===== MENU =====
chrome.runtime.onInstalled.addListener(() => {
    chrome.contextMenus.create({
        id: 'writeComment',
        title: '✍️ Viết comment',
        contexts: ['all'],
        documentUrlPatterns: ['https://x.com/*']
    });
});

// FIRE & FORGET — không đợi content trả lời
chrome.contextMenus.onClicked.addListener((info, tab) => {
    if (info.menuItemId !== 'writeComment' || !tab?.id) return;
    chrome.tabs.sendMessage(tab.id, { action: 'OPEN_FORM' }).catch(() => {});
});

// LUÔN GỌI sendResponse(), KHÔNG BAO GIỜ return true
chrome.runtime.onMessage.addListener((request, sender, sendResponse) => {
    if (request.action === 'GENERATE_COMMENT') {
        handleGenerate(request.data, sender.tab.id);
        sendResponse({ received: true });
        return false;
    }
    sendResponse({ unknown: true });
    return false;
});

async function handleGenerate({ text, lang, tone, angle }, tabId) {
    const cfg = await chrome.storage.local.get(['apiUrl', 'apiKey']);
    if (!cfg.apiUrl || !cfg.apiKey) {
        await chrome.tabs.sendMessage(tabId, {
            action: 'SHOW_ERROR',
            error: '⚠️ Chưa cấu hình API.\n\n👉 Bấm tab ⚙️ Config để nhập URL và Key.'
        }).catch(() => {});
        return;
    }

    try {
        const payload = {
            originalPost: text,
            language: lang,
            tone: tone?tone.toLowerCase():undefined,
            angle: angle?angle.toLowerCase():undefined,
        };
        const res = await fetch(cfg.apiUrl, {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json',
                'Authorization': `Bearer ${cfg.apiKey}`
            },
            body: JSON.stringify(payload)
        });
        const data = await res.json();
        if (!res.ok) throw new Error(`HTTP ${res.status}`);
        const comment = data.comment || data.text || JSON.stringify(data);
        const model = data.model || '';
        await chrome.tabs.sendMessage(tabId, { action: 'SHOW_RESULT', comment , model}).catch(() => {});
    } catch (err) {
        await chrome.tabs.sendMessage(tabId, { action: 'SHOW_ERROR', error: err.message }).catch(() => {});
    }
}