/**
 * Background script - handles cookie operations and API calls
 */

// Initialize API on startup
browser.runtime.onInstalled.addListener(async () => {
  console.log('GallerySubscriber extension installed');
  await api.init();
});

browser.runtime.onStartup.addListener(async () => {
  await api.init();
});

// Handle messages from popup and options pages
browser.runtime.onMessage.addListener((message, sender, sendResponse) => {
  handleMessage(message)
    .then(sendResponse)
    .catch(error => {
      console.error('Message handler error:', error);
      sendResponse({ error: error.message });
    });
  return true; // Keep channel open for async response
});

/**
 * Route messages to appropriate handlers
 * @param {object} message - Message object with type property
 * @returns {Promise<object>} - Response data
 */
async function handleMessage(message) {
  switch (message.type) {
    case 'EXPORT_COOKIES':
      return await exportCookies(message.platform);

    case 'EXPORT_ALL_COOKIES':
      return await exportAllCookies();

    case 'GET_PLATFORM_STATUS':
      return await getPlatformStatus();

    case 'TEST_CONNECTION':
      return await testConnection();

    case 'GET_CONFIG':
      return await getConfig();

    case 'SAVE_CONFIG':
      return await saveConfig(message.config);

    default:
      throw new Error(`Unknown message type: ${message.type}`);
  }
}

/**
 * Export cookies for a single platform to the backend
 * @param {string} platformKey - Platform identifier
 * @returns {Promise<object>} - Result object
 */
async function exportCookies(platformKey) {
  await api.init();

  const platform = PLATFORMS[platformKey];
  if (!platform) {
    throw new Error(`Unknown platform: ${platformKey}`);
  }

  let credentialData;
  let credentialType;

  if (platform.authType === 'token') {
    // Discord and other token-based platforms require manual entry
    throw new Error(`${platform.name} requires manual token entry in the web UI. Token extraction is not supported for security reasons.`);
  }

  // Cookie-based auth
  const cookies = await extractCookiesForPlatform(platformKey);

  if (cookies.length === 0) {
    throw new Error(`No cookies found for ${platform.name}. Please ensure you are logged in.`);
  }

  credentialData = toNetscapeFormat(cookies);
  credentialType = 'cookies';

  // Send to backend
  const result = await api.uploadCredentials(platformKey, credentialType, credentialData);

  return {
    success: true,
    platform: platformKey,
    cookieCount: cookies.length,
    message: result.message || 'Credentials exported successfully'
  };
}

/**
 * Export cookies for all cookie-based platforms
 * @returns {Promise<object>} - Results for each platform
 */
async function exportAllCookies() {
  await api.init();

  const results = {};
  const platforms = Object.keys(PLATFORMS);

  for (const platformKey of platforms) {
    const platform = PLATFORMS[platformKey];

    // Skip token-based platforms
    if (platform.authType === 'token') {
      results[platformKey] = {
        success: false,
        platform: platformKey,
        skipped: true,
        message: 'Token-based auth requires manual entry'
      };
      continue;
    }

    try {
      results[platformKey] = await exportCookies(platformKey);
    } catch (error) {
      results[platformKey] = {
        success: false,
        platform: platformKey,
        error: error.message
      };
    }
  }

  return results;
}

/**
 * Get status information for all platforms
 * @returns {Promise<object>} - Status for each platform
 */
async function getPlatformStatus() {
  const status = {};

  for (const [key, platform] of Object.entries(PLATFORMS)) {
    try {
      if (platform.authType === 'token') {
        // Token-based platforms
        status[key] = {
          name: platform.name,
          authType: 'token',
          hasCookies: false,
          cookieCount: 0,
          note: platform.note || 'Requires manual token entry'
        };
      } else {
        // Cookie-based platforms
        const cookies = await extractCookiesForPlatform(key);
        status[key] = {
          name: platform.name,
          authType: 'cookies',
          hasCookies: cookies.length > 0,
          cookieCount: cookies.length
        };
      }
    } catch (error) {
      status[key] = {
        name: platform.name,
        authType: platform.authType,
        hasCookies: false,
        cookieCount: 0,
        error: error.message
      };
    }
  }

  return status;
}

/**
 * Test connection to the backend
 * @returns {Promise<object>} - Connection status
 */
async function testConnection() {
  await api.init();

  if (!api.isConfigured()) {
    return { connected: false, error: 'Not configured' };
  }

  try {
    await api.testConnection();
    return { connected: true };
  } catch (error) {
    return { connected: false, error: error.message };
  }
}

/**
 * Get current configuration
 * @returns {Promise<object>} - Config object
 */
async function getConfig() {
  const config = await browser.storage.local.get(['apiUrl', 'apiKey']);
  return config;
}

/**
 * Save configuration
 * @param {object} config - Config object with apiUrl and apiKey
 * @returns {Promise<object>} - Success status
 */
async function saveConfig(config) {
  await browser.storage.local.set(config);
  await api.init();
  return { success: true };
}