/**
 * TradeMate Background Service Worker
 * Handles context menus and clipboard operations.
 */

import { translate } from '../api/client.js';

chrome.runtime.onInstalled.addListener(() => {
  chrome.contextMenus.create({
    id: 'translate-selection',
    title: 'TradeMate 翻译选中文本',
    contexts: ['selection'],
  });
});

chrome.contextMenus.onClicked.addListener(async (info, tab) => {
  if (info.menuItemId === 'translate-selection') {
    const selectedText = info.selectionText.trim();
    if (!selectedText) return;

    try {
      const result = await translate(selectedText, 'zh');
      const translated = result.translated_text || '翻译失败';

      // Try to send to content script for display
      if (tab?.id) {
        chrome.tabs.sendMessage(tab.id, {
          action: 'showTranslation',
          original: selectedText,
          translated,
        }).catch(() => {
          // Fallback: show in notification
          notifyResult(translated);
        });
      } else {
        notifyResult(translated);
      }
    } catch (err) {
      notifyResult(`错误: ${err.message}`);
    }
  }
});

function notifyResult(text) {
  chrome.notifications.create({
    type: 'basic',
    iconUrl: 'icons/icon48.png',
    title: 'TradeMate 翻译',
    message: text.slice(0, 200),
  });
}

// Listen for popup API calls that need background processing
chrome.runtime.onMessage.addListener((request, sender, sendResponse) => {
  if (request.action === 'translateContext') {
    translate(request.text, request.targetLang)
      .then(result => sendResponse({ ok: true, data: result }))
      .catch(err => sendResponse({ ok: false, error: err.message }));
    return true; // Keep channel open for async response
  }
});