/**
 * Emergency Service Worker Reset - One-time execution
 * Forces complete service worker and cache cleanup
 * Fixes stuck service worker showing stale content
 *
 * This script runs ONCE per browser and then never again.
 * It unregisters all service workers, clears all caches, and forces reload.
 */

(async function() {
  'use strict';

  const RESET_FLAG = 'tractatus_sw_reset_v2_complete';
  const RESET_VERSION = '0.1.5'; // Increment this to force another reset if needed

  // Check if reset already completed for this version
  const completedVersion = localStorage.getItem(RESET_FLAG);
  if (completedVersion === RESET_VERSION) {
    console.log('[SW Reset] Already completed for version', RESET_VERSION);
    return;
  }

  console.log('[SW Reset] Starting emergency service worker reset...');

  try {
    // Step 1: Unregister ALL service workers
    if ('serviceWorker' in navigator) {
      const registrations = await navigator.serviceWorker.getRegistrations();
      console.log(`[SW Reset] Found ${registrations.length} service worker(s) to unregister`);

      for (const registration of registrations) {
        const unregistered = await registration.unregister();
        console.log('[SW Reset] Unregistered service worker:', unregistered ? 'success' : 'failed');
      }
    }

    // Step 2: Delete ALL caches
    if ('caches' in window) {
      const cacheNames = await caches.keys();
      console.log(`[SW Reset] Found ${cacheNames.length} cache(s) to delete`);

      for (const cacheName of cacheNames) {
        const deleted = await caches.delete(cacheName);
        console.log(`[SW Reset] Deleted cache "${cacheName}":`, deleted ? 'success' : 'failed');
      }
    }

    // Step 3: Mark reset as complete
    localStorage.setItem(RESET_FLAG, RESET_VERSION);
    console.log('[SW Reset] Reset complete - reloading page...');

    // Step 4: Force reload to start fresh
    // Use location.reload(true) to bypass cache (though some browsers ignore the parameter)
    setTimeout(() => {
      window.location.reload();
    }, 500);

  } catch (error) {
    console.error('[SW Reset] Error during reset:', error);
    // Even if reset fails, mark as complete to avoid infinite reload loop
    localStorage.setItem(RESET_FLAG, RESET_VERSION);
  }
})();