// HTTP 431 Error Prevention for Clerk Authentication
// These optimizations reduce token size and prevent header overflow

export const authOptimizations = {
  // Reduce session data payload
  sessionConfig: {
    // Shorter session duration reduces token size
    maxAgeInSeconds: 60 * 60 * 12, // 12 hours instead of 24
    // Disable unnecessary features that increase token size
    allowDangerousEmailAccountLinking: false,
    // Skip session refresh to reduce token bloat
    skipSessionRefresh: false,
  },
  
  // Cookie optimizations
  cookieConfig: {
    sameSite: 'lax' as const,
    secure: process.env.NODE_ENV === 'production',
    // Reduce cookie size by limiting domains
    domain: process.env.NODE_ENV === 'production' ? undefined : 'localhost',
  },
  
  // Development optimizations
  developmentConfig: {
    // Clear local storage on sign out to prevent token accumulation
    clearTokensOnSignOut: true,
    // Use shorter token names in development
    useShortTokenNames: true,
  },
  
  // Redirect optimizations
  redirectConfig: {
    // Use simple URLs to reduce redirect chain length
    signInUrl: '/sign-in',
    signUpUrl: '/sign-up',
    afterSignInUrl: '/',
    afterSignUpUrl: '/',
    // Prevent long redirect URLs
    avoidRedirectChains: true,
  }
};

// Utility to clear potentially large tokens
export const clearLargeTokens = () => {
  if (typeof window !== 'undefined') {
    // Clear localStorage items that might contain large tokens
    const clerkKeys = Object.keys(localStorage).filter(key => 
      key.includes('clerk') || key.includes('session')
    );
    
    clerkKeys.forEach(key => {
      const value = localStorage.getItem(key);
      if (value && value.length > 1000) { // If token is unusually large
        localStorage.removeItem(key);
        console.warn(`Cleared large token: ${key}`);
      }
    });
  }
};