import { defineNuxtRouteMiddleware, navigateTo } from '#app';
import type { RouteLocationNormalized } from 'vue-router';
import { useAuth } from '~/composables/useAuth'; 

export default defineNuxtRouteMiddleware(async (to: RouteLocationNormalized) => {
  console.log('🛡️ Auth middleware triggered for:', to.path);

  // Check for bypass flag (from keyboard shortcut)
  if (process.client) {
    const bypassFlag = sessionStorage.getItem('bypassRootRedirect');
    if (bypassFlag === 'true' && to.path === '/') {
      console.log('🔑 Bypass flag detected - allowing root access');
      // Clear the flag immediately to prevent future bypasses
      sessionStorage.removeItem('bypassRootRedirect');
      return; // Allow access without any redirect
    }
  }

  // Redirect root path to LoginPage
  if (to.path === '/') {
    console.log('🔄 Redirecting from root to LoginPage');
    return navigateTo('/LoginPage', { replace: true });
  }

  // Allow the login page to handle its own checks without redirection loops
  if (to.path === '/LoginPage') {
    console.log('⏭️ Allowing access to LoginPage');
    return;
  }
  
  // Skip auth check if it's the development server side render pass.
  if (process.server && process.env.NODE_ENV === 'development') {
    console.log('⏭️ Skipping intensive check on server-side during development');
    useAuth();
    return;
  }

  // Check for the authentication signal from a successful login redirect
  const isAuthRedirect: boolean = to.query.authenticated === 'true';

  if (isAuthRedirect) {
    console.log('⏳ Client-side is processing a new login session, allowing the route to load...');
    return navigateTo({ path: to.path, query: {} }, { replace: true });
  }

  try {
    const { checkAuth } = useAuth();
    console.log('🔍 Checking authentication status using useAuth...');
    
    const user = await checkAuth(); 

    if (user) {
      console.log('✅ User is authenticated:', user.name || user.preferred_username || user.email);
      return;
    } else {
      console.log('❌ No valid session found, redirecting to login');
      return navigateTo('/LoginPage');
    }
  } catch (error) {
    console.error('❌ Auth middleware error:', error);
    console.log('🔄 Redirecting to login due to error');
    return navigateTo('/LoginPage');
  }
});