import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card'
import { Button } from '@/components/ui/button'
import { useAuth } from '@/contexts/AuthContext'

export function AdminUsersPage() {
  const { user } = useAuth()

  // Mock user data - in real app this would come from API
  const users = [
    {
      id: '1',
      name: 'John Doe',
      email: 'john@example.com',
      role: 'admin',
      is_active: true,
      providers: ['password', 'google'],
      created_at: '2024-01-15T10:30:00Z'
    },
    {
      id: '2', 
      name: 'Jane Smith',
      email: 'jane@example.com',
      role: 'user',
      is_active: true,
      providers: ['github'],
      created_at: '2024-01-20T14:15:00Z'
    },
    {
      id: '3',
      name: 'Bob Wilson',
      email: 'bob@example.com', 
      role: 'user',
      is_active: false,
      providers: ['password'],
      created_at: '2024-01-25T09:45:00Z'
    }
  ]

  if (user?.role !== 'admin') {
    return (
      <div className="flex items-center justify-center h-96">
        <Card>
          <CardHeader>
            <CardTitle>Access Denied</CardTitle>
            <CardDescription>You don't have permission to access this page.</CardDescription>
          </CardHeader>
        </Card>
      </div>
    )
  }

  return (
    <div className="space-y-6">
      <Card>
        <CardHeader>
          <CardTitle>Users</CardTitle>
          <CardDescription>All registered users in the system</CardDescription>
        </CardHeader>
        <CardContent>
          <div className="space-y-4">
            {users.map((userData) => (
              <div 
                key={userData.id}
                className="flex items-center justify-between p-4 border rounded-lg"
              >
                <div className="flex items-center space-x-4">
                  <div className="w-10 h-10 bg-primary/10 rounded-full flex items-center justify-center">
                    <span className="text-sm font-medium">
                      {userData.name.split(' ').map(n => n[0]).join('')}
                    </span>
                  </div>
                  
                  <div className="space-y-1">
                    <div className="flex items-center space-x-2">
                      <span className="font-medium">{userData.name}</span>
                      <span className={`px-2 py-1 rounded-full text-xs font-medium ${
                        userData.role === 'admin' 
                          ? 'bg-purple-100 text-purple-800' 
                          : 'bg-green-100 text-green-800'
                      }`}>
                        {userData.role}
                      </span>
                      {!userData.is_active && (
                        <span className="px-2 py-1 bg-red-100 text-red-800 rounded-full text-xs font-medium">
                          Disabled
                        </span>
                      )}
                    </div>
                    <p className="text-sm text-muted-foreground">{userData.email}</p>
                    <div className="flex gap-1">
                      {userData.providers.map((provider) => (
                        <span 
                          key={provider}
                          className="px-1.5 py-0.5 bg-secondary rounded text-xs"
                        >
                          {provider}
                        </span>
                      ))}
                    </div>
                  </div>
                </div>

                <div className="flex items-center space-x-2">
                  <Button variant="outline" size="sm">
                    Edit
                  </Button>
                  <Button 
                    variant={userData.is_active ? "outline" : "default"} 
                    size="sm"
                  >
                    {userData.is_active ? 'Disable' : 'Enable'}
                  </Button>
                </div>
              </div>
            ))}
          </div>
        </CardContent>
      </Card>

      <div className="grid gap-6 md:grid-cols-3">
        <Card>
          <CardHeader>
            <CardTitle>Total Users</CardTitle>
          </CardHeader>
          <CardContent>
            <div className="text-2xl font-bold">{users.length}</div>
            <p className="text-xs text-muted-foreground">Registered users</p>
          </CardContent>
        </Card>

        <Card>
          <CardHeader>
            <CardTitle>Active Users</CardTitle>
          </CardHeader>
          <CardContent>
            <div className="text-2xl font-bold">{users.filter(u => u.is_active).length}</div>
            <p className="text-xs text-muted-foreground">Currently active</p>
          </CardContent>
        </Card>

        <Card>
          <CardHeader>
            <CardTitle>Admins</CardTitle>
          </CardHeader>
          <CardContent>
            <div className="text-2xl font-bold">{users.filter(u => u.role === 'admin').length}</div>
            <p className="text-xs text-muted-foreground">Administrator accounts</p>
          </CardContent>
        </Card>
      </div>
    </div>
  )
}