import { useState, useEffect } from 'react';
import { BrowserRouter as Router, Routes, Route, Link } from 'react-router-dom';
import { apiCall } from './config/api';
import VipList from './pages/VipList';
import VipDetails from './pages/VipDetails';
import DriverList from './pages/DriverList';
import DriverDashboard from './pages/DriverDashboard';
import Dashboard from './pages/Dashboard';
import AdminDashboard from './pages/AdminDashboard';
import UserManagement from './components/UserManagement';
import Login from './components/Login';
import './App.css';

function App() {
  const [user, setUser] = useState<any>(null);
  const [loading, setLoading] = useState(true);

  useEffect(() => {
    // Check if user is already authenticated
    const token = localStorage.getItem('authToken');
    if (token) {
      apiCall('/auth/me', {
        headers: {
          'Authorization': `Bearer ${token}`
        }
      })
      .then(res => {
        if (res.ok) {
          return res.json();
        } else {
          // Token is invalid, remove it
          localStorage.removeItem('authToken');
          throw new Error('Invalid token');
        }
      })
      .then(userData => {
        setUser(userData);
        setLoading(false);
      })
      .catch(error => {
        console.error('Auth check failed:', error);
        setLoading(false);
      });
    } else {
      setLoading(false);
    }
  }, []);

  const handleLogin = (userData: any) => {
    setUser(userData);
  };

  const handleLogout = () => {
    localStorage.removeItem('authToken');
    setUser(null);
    // Optionally call logout endpoint
    apiCall('/auth/logout', { method: 'POST' })
      .catch(error => console.error('Logout error:', error));
  };

  if (loading) {
    return (
      <div className="min-h-screen bg-gradient-to-br from-slate-50 to-slate-100 flex justify-center items-center">
        <div className="bg-white rounded-2xl shadow-xl p-8 flex items-center space-x-4">
          <div className="w-8 h-8 border-4 border-blue-600 border-t-transparent rounded-full animate-spin"></div>
          <span className="text-lg font-medium text-slate-700">Loading VIP Coordinator...</span>
        </div>
      </div>
    );
  }

  // Handle OAuth callback route even when not logged in
  if (window.location.pathname === '/auth/callback' || window.location.pathname === '/auth/google/callback') {
    return <Login onLogin={handleLogin} />;
  }

  if (!user) {
    return <Login onLogin={handleLogin} />;
  }

  return (
    <Router>
      <div className="min-h-screen bg-gradient-to-br from-slate-50 via-blue-50 to-indigo-50">
        {/* Modern Navigation */}
        <nav className="bg-white/80 backdrop-blur-lg border-b border-slate-200/60 sticky top-0 z-50">
          <div className="max-w-7xl mx-auto px-6 lg:px-8">
            <div className="flex justify-between items-center h-16">
              {/* Logo/Brand */}
              <div className="flex items-center space-x-3">
                <div className="w-8 h-8 bg-gradient-to-br from-blue-600 to-indigo-600 rounded-lg flex items-center justify-center">
                  <span className="text-white font-bold text-sm">VC</span>
                </div>
                <h1 className="text-xl font-bold bg-gradient-to-r from-slate-800 to-slate-600 bg-clip-text text-transparent">
                  VIP Coordinator
                </h1>
              </div>

              {/* Navigation Links */}
              <div className="hidden md:flex items-center space-x-1">
                <Link 
                  to="/" 
                  className="px-4 py-2 text-sm font-medium text-slate-700 hover:text-blue-600 hover:bg-blue-50 rounded-lg transition-all duration-200"
                >
                  Dashboard
                </Link>
                <Link 
                  to="/vips" 
                  className="px-4 py-2 text-sm font-medium text-slate-700 hover:text-blue-600 hover:bg-blue-50 rounded-lg transition-all duration-200"
                >
                  VIPs
                </Link>
                <Link 
                  to="/drivers" 
                  className="px-4 py-2 text-sm font-medium text-slate-700 hover:text-blue-600 hover:bg-blue-50 rounded-lg transition-all duration-200"
                >
                  Drivers
                </Link>
                {(user.role === 'administrator' || user.role === 'coordinator') && (
                  <Link 
                    to="/admin" 
                    className="px-4 py-2 text-sm font-medium text-slate-700 hover:text-amber-600 hover:bg-amber-50 rounded-lg transition-all duration-200"
                  >
                    Admin
                  </Link>
                )}
                {user.role === 'administrator' && (
                  <Link 
                    to="/users" 
                    className="px-4 py-2 text-sm font-medium text-slate-700 hover:text-purple-600 hover:bg-purple-50 rounded-lg transition-all duration-200"
                  >
                    Users
                  </Link>
                )}
              </div>

              {/* User Menu */}
              <div className="flex items-center space-x-4">
                <div className="hidden sm:flex items-center space-x-3">
                  <div className="w-8 h-8 bg-gradient-to-br from-slate-400 to-slate-600 rounded-full flex items-center justify-center">
                    <span className="text-white text-xs font-medium">
                      {user.name.charAt(0).toUpperCase()}
                    </span>
                  </div>
                  <div className="text-sm">
                    <div className="font-medium text-slate-900">{user.name}</div>
                    <div className="text-slate-500 capitalize">{user.role}</div>
                  </div>
                </div>
                <button 
                  onClick={handleLogout}
                  className="bg-gradient-to-r from-red-500 to-red-600 hover:from-red-600 hover:to-red-700 text-white px-4 py-2 rounded-lg text-sm font-medium transition-all duration-200 shadow-lg hover:shadow-xl"
                >
                  Logout
                </button>
              </div>
            </div>
          </div>
        </nav>

        {/* Main Content */}
        <main className="max-w-7xl mx-auto px-6 lg:px-8 py-8">
          <Routes>
            <Route path="/" element={<Dashboard />} />
            <Route path="/vips" element={<VipList />} />
            <Route path="/vips/:id" element={<VipDetails />} />
            <Route path="/drivers" element={<DriverList />} />
            <Route path="/drivers/:driverId" element={<DriverDashboard />} />
            <Route path="/admin" element={<AdminDashboard />} />
            <Route path="/users" element={<UserManagement currentUser={user} />} />
          </Routes>
        </main>
      </div>
    </Router>
  );
}

export default App;