frontend/src/App.jsx

import React from 'react'
import { BrowserRouter as Router, Routes, Route, Navigate } from 'react-router-dom'
import { Toaster } from 'react-hot-toast'
import { AuthProvider } from './context/AuthContext'
import { useAuth } from './hooks/useAuth'

// Layout
import Navbar from './components/Layout/Navbar'
import Sidebar from './components/Layout/Sidebar'
import Footer from './components/Layout/Footer'

// Pages
import Login from './components/Auth/Login'
import Register from './components/Auth/Register'
import Dashboard from './components/Dashboard/Dashboard'
import Learn from './components/Learn/Learn'
import Quiz from './components/Quiz/Quiz'
import Progress from './components/Progress/Progress'

// Protected Route Component
const ProtectedRoute = ({ children }) => {
  const { user, loading } = useAuth()
  
  if (loading) {
    return (
      <div className="min-h-screen flex items-center justify-center">
        <div className="animate-spin rounded-full h-16 w-16 border-t-4 border-b-4 border-primary-600"></div>
      </div>
    )
  }
  
  return user ? children : <Navigate to="/login" />
}

// Main Layout Component
const MainLayout = ({ children }) => {
  const [sidebarOpen, setSidebarOpen] = React.useState(true)
  
  return (
    <div className="min-h-screen flex">
      <Sidebar isOpen={sidebarOpen} />
      <div className="flex-1 flex flex-col">
        <Navbar onMenuClick={() => setSidebarOpen(!sidebarOpen)} />
        <main className="flex-1 overflow-auto">
          <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-8">
            {children}
          </div>
        </main>
        <Footer />
      </div>
    </div>
  )
}

function App() {
  return (
    <AuthProvider>
      <Router>
        <Toaster
          position="top-right"
          toastOptions={{
            duration: 3000,
            style: {
              background: '#fff',
              color: '#1e293b',
              padding: '16px',
              borderRadius: '12px',
              boxShadow: '0 10px 25px rgba(0,0,0,0.1)',
            },
            success: {
              iconTheme: {
                primary: '#0ea5e9',
                secondary: '#fff',
              },
            },
          }}
        />
        
        <Routes>
          {/* Public Routes */}
          <Route path="/login" element={<Login />} />
          <Route path="/register" element={<Register />} />
          
          {/* Protected Routes */}
          <Route path="/" element={
            <ProtectedRoute>
              <MainLayout>
                <Dashboard />
              </MainLayout>
            </ProtectedRoute>
          } />
          
          <Route path="/learn" element={
            <ProtectedRoute>
              <MainLayout>
                <Learn />
              </MainLayout>
            </ProtectedRoute>
          } />
          
          <Route path="/learn/:topicId" element={
            <ProtectedRoute>
              <MainLayout>
                <Learn />
              </MainLayout>
            </ProtectedRoute>
          } />
          
          <Route path="/quiz" element={
            <ProtectedRoute>
              <MainLayout>
                <Quiz />
              </MainLayout>
            </ProtectedRoute>
          } />
          
          <Route path="/quiz/:topicId" element={
            <ProtectedRoute>
              <MainLayout>
                <Quiz />
              </MainLayout>
            </ProtectedRoute>
          } />
          
          <Route path="/progress" element={
            <ProtectedRoute>
              <MainLayout>
                <Progress />
              </MainLayout>
            </ProtectedRoute>
          } />
          
          {/* Redirect unknown routes */}
          <Route path="*" element={<Navigate to="/" />} />
        </Routes>
      </Router>
    </AuthProvider>
  )
}

export default App