package org.eclipse.aether.util.repository;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *  http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import static org.junit.Assert.*;

import java.io.IOException;
import java.net.Authenticator;
import java.net.InetSocketAddress;
import java.net.PasswordAuthentication;
import java.net.SocketAddress;
import java.net.URI;
import java.net.URL;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

import org.eclipse.aether.DefaultRepositorySystemSession;
import org.eclipse.aether.repository.Authentication;
import org.eclipse.aether.repository.AuthenticationContext;
import org.eclipse.aether.repository.Proxy;
import org.eclipse.aether.repository.ProxySelector;
import org.eclipse.aether.repository.RemoteRepository;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

public class JreProxySelectorTest
{

    private abstract class AbstractProxySelector
        extends java.net.ProxySelector
    {
        @Override
        public void connectFailed( URI uri, SocketAddress sa, IOException ioe )
        {
        }
    }

    private ProxySelector selector = new JreProxySelector();

    private java.net.ProxySelector original;

    @Before
    public void init()
    {
        original = java.net.ProxySelector.getDefault();
    }

    @After
    public void exit()
    {
        java.net.ProxySelector.setDefault( original );
        Authenticator.setDefault( null );
    }

    @Test
    public void testGetProxy_InvalidUrl()
    {
        RemoteRepository repo = new RemoteRepository.Builder( "test", "default", "http://host:invalid" ).build();
        assertNull( selector.getProxy( repo ) );
    }

    @Test
    public void testGetProxy_OpaqueUrl()
    {
        RemoteRepository repo = new RemoteRepository.Builder( "test", "default", "classpath:base" ).build();
        assertNull( selector.getProxy( repo ) );
    }

    @Test
    public void testGetProxy_NullSelector()
    {
        RemoteRepository repo = new RemoteRepository.Builder( "test", "default", "http://repo.eclipse.org/" ).build();
        java.net.ProxySelector.setDefault( null );
        assertNull( selector.getProxy( repo ) );
    }

    @Test
    public void testGetProxy_NoProxies()
    {
        RemoteRepository repo = new RemoteRepository.Builder( "test", "default", "http://repo.eclipse.org/" ).build();
        java.net.ProxySelector.setDefault( new AbstractProxySelector()
        {
            @Override
            public List<java.net.Proxy> select( URI uri )
            {
                return Collections.emptyList();
            }

        } );
        assertNull( selector.getProxy( repo ) );
    }

    @Test
    public void testGetProxy_DirectProxy()
    {
        RemoteRepository repo = new RemoteRepository.Builder( "test", "default", "http://repo.eclipse.org/" ).build();
        final InetSocketAddress addr = InetSocketAddress.createUnresolved( "proxy", 8080 );
        java.net.ProxySelector.setDefault( new AbstractProxySelector()
        {
            @Override
            public List<java.net.Proxy> select( URI uri )
            {
                return Arrays.asList( java.net.Proxy.NO_PROXY, new java.net.Proxy( java.net.Proxy.Type.HTTP, addr ) );
            }

        } );
        assertNull( selector.getProxy( repo ) );
    }

    @Test
    public void testGetProxy_HttpProxy()
        throws Exception
    {
        final RemoteRepository repo =
            new RemoteRepository.Builder( "test", "default", "http://repo.eclipse.org/" ).build();
        final URL url = new URL( repo.getUrl() );
        final InetSocketAddress addr = InetSocketAddress.createUnresolved( "proxy", 8080 );
        java.net.ProxySelector.setDefault( new AbstractProxySelector()
        {
            @Override
            public List<java.net.Proxy> select( URI uri )
            {
                if ( repo.getHost().equalsIgnoreCase( uri.getHost() ) )
                {
                    return Arrays.asList( new java.net.Proxy( java.net.Proxy.Type.HTTP, addr ) );
                }
                return Collections.emptyList();
            }

        } );
        Authenticator.setDefault( new Authenticator()
        {
            @Override
            protected PasswordAuthentication getPasswordAuthentication()
            {
                if ( Authenticator.RequestorType.PROXY.equals( getRequestorType() )
                    && addr.getHostName().equals( getRequestingHost() ) && addr.getPort() == getRequestingPort()
                    && url.equals( getRequestingURL() ) )
                {
                    return new PasswordAuthentication( "proxyuser", "proxypass".toCharArray() );
                }
                return super.getPasswordAuthentication();
            }
        } );

        Proxy proxy = selector.getProxy( repo );
        assertNotNull( proxy );
        assertEquals( addr.getHostName(), proxy.getHost() );
        assertEquals( addr.getPort(), proxy.getPort() );
        assertEquals( Proxy.TYPE_HTTP, proxy.getType() );

        RemoteRepository repo2 = new RemoteRepository.Builder( repo ).setProxy( proxy ).build();
        Authentication auth = proxy.getAuthentication();
        assertNotNull( auth );
        AuthenticationContext authCtx = AuthenticationContext.forProxy( new DefaultRepositorySystemSession(), repo2 );
        assertEquals( "proxyuser", authCtx.get( AuthenticationContext.USERNAME ) );
        assertEquals( "proxypass", authCtx.get( AuthenticationContext.PASSWORD ) );
    }

}