/**
 * Background script for Claude Conversation Exporter
 * Handles extension lifecycle events and content script injection
 */

import { defineBackground as wxtDefineBackground } from 'wxt/utils/define-background';
import type { ExtensionMessage } from '../src/types';

export default wxtDefineBackground(() => {
  console.log('Claude Conversation Exporter background script loaded');

  /**
   * Handle extension installation
   */
  browser.runtime.onInstalled.addListener(() => {
    console.log('Claude Conversation Exporter installed');

    // Inject content script into already-open Claude.ai tabs
    void (async () => {
      try {
        const tabs = await browser.tabs.query({ url: 'https://claude.ai/*' });

        for (const tab of tabs) {
          if (tab.id) {
            try {
              await browser.scripting.executeScript({
                target: { tabId: tab.id },
                files: ['content-scripts/content.js'],
              });
            } catch (err) {
              console.log('Could not inject into tab', tab.id, err);
            }
          }
        }
      } catch (err) {
        console.error('Error querying or injecting tabs:', err);
      }
    })();
  });

  /**
   * Handle messages from popup or other extension components
   */
  browser.runtime.onMessage.addListener(
    (request: ExtensionMessage, _sender: browser.runtime.MessageSender) => {
      if (request.action === 'ensureContentScript') {
        return (async () => {
          try {
            const tabs = await browser.tabs.query({
              active: true,
              currentWindow: true,
            });

            const activeTab = tabs[0];
            if (activeTab?.id) {
              await browser.scripting.executeScript({
                target: { tabId: activeTab.id },
                files: ['content-scripts/content.js'],
              });

              return { success: true };
            }

            return {
              success: false,
              error: 'No active tab found',
            };
          } catch (err) {
            return {
              success: false,
              error: err instanceof Error ? err.message : 'Unknown error',
            };
          }
        })();
      }

      // Return false to indicate no response will be sent
      return false;
    }
  );
});