import { defineNuxtRouteMiddleware, navigateTo } from '#app';
import type { RouteLocationNormalized } from 'vue-router';
// Import the useAuth composable (it will be auto-imported, but this helps TypeScript/VS Code)
import { useAuth } from '~/composables/useAuth'; 

// NOTE: We don't need the interfaces here anymore, as useAuth handles the typing.

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

  // 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.
  // Although we still recommend using the checkAuth() composable for better SSR handling.
  if (process.server && process.env.NODE_ENV === 'development') {
    console.log('⏭️ Skipping intensive check on server-side during development');
    // Using the composable here ensures it is registered correctly, even if we skip the main check
    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...');
    
    // Use the composable's function to check the session
    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');
      // If checkAuth fails, it already cleared the user state. Redirect.
      return navigateTo('/LoginPage');
    }
  } catch (error) {
    console.error('❌ Auth middleware error:', error);
    console.log('🔄 Redirecting to login due to error');
    return navigateTo('/LoginPage');
  }
});