/*
 * Copyright (C) 2008, 2014 Google Inc.
 * and other copyright owners as documented in the project's IP log.
 *
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Distribution License v1.0 which
 * accompanies this distribution, is reproduced below, and is
 * available at http://www.eclipse.org/org/documents/edl-v10.php
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or
 * without modification, are permitted provided that the following
 * conditions are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above
 *   copyright notice, this list of conditions and the following
 *   disclaimer in the documentation and/or other materials provided
 *   with the distribution.
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 * - Neither the name of the Eclipse Foundation, Inc. nor the
 *   names of its contributors may be used to endorse or promote
 *   products derived from this software without specific prior
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package org.eclipse.jgit.transport;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;

import org.eclipse.jgit.junit.RepositoryTestCase;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.transport.OpenSshConfig.Host;
import org.eclipse.jgit.util.FileUtils;
import org.junit.Before;
import org.junit.Test;

public class OpenSshConfigTest extends RepositoryTestCase {
	private File home;

	private File configFile;

	private OpenSshConfig osc;

	@Before
	public void setUp() throws Exception {
		super.setUp();

		home = new File(trash, "home");
		FileUtils.mkdir(home);

		configFile = new File(new File(home, ".ssh"), Constants.CONFIG);
		FileUtils.mkdir(configFile.getParentFile());

		System.setProperty("user.name", "jex_junit");
		osc = new OpenSshConfig(home, configFile);
	}

	private void config(final String data) throws IOException {
		final OutputStreamWriter fw = new OutputStreamWriter(
				new FileOutputStream(configFile), "UTF-8");
		fw.write(data);
		fw.close();
	}

	@Test
	public void testNoConfig() {
		final Host h = osc.lookup("repo.or.cz");
		assertNotNull(h);
		assertEquals("repo.or.cz", h.getHostName());
		assertEquals("jex_junit", h.getUser());
		assertEquals(22, h.getPort());
		assertEquals(1, h.getConnectionAttempts());
		assertNull(h.getIdentityFile());
	}

	@Test
	public void testSeparatorParsing() throws Exception {
		config("Host\tfirst\n" +
		       "\tHostName\tfirst.tld\n" +
		       "\n" +
		       "Host second\n" +
		       " HostName\tsecond.tld\n" +
		       "Host=third\n" +
		       "HostName=third.tld\n\n\n" +
		       "\t Host = fourth\n\n\n" +
		       " \t HostName\t=fourth.tld\n" +
		       "Host\t =     last\n" +
		       "HostName  \t    last.tld");
		assertNotNull(osc.lookup("first"));
		assertEquals("first.tld", osc.lookup("first").getHostName());
		assertNotNull(osc.lookup("second"));
		assertEquals("second.tld", osc.lookup("second").getHostName());
		assertNotNull(osc.lookup("third"));
		assertEquals("third.tld", osc.lookup("third").getHostName());
		assertNotNull(osc.lookup("fourth"));
		assertEquals("fourth.tld", osc.lookup("fourth").getHostName());
		assertNotNull(osc.lookup("last"));
		assertEquals("last.tld", osc.lookup("last").getHostName());
	}

	@Test
	public void testQuoteParsing() throws Exception {
		config("Host \"good\"\n" +
			" HostName=\"good.tld\"\n" +
			" Port=\"6007\"\n" +
			" User=\"gooduser\"\n" +
			"Host multiple unquoted and \"quoted\" \"hosts\"\n" +
			" Port=\"2222\"\n" +
			"Host \"spaced\"\n" +
			"# Bad host name, but testing preservation of spaces\n" +
			" HostName=\" spaced\ttld \"\n" +
			"# Misbalanced quotes\n" +
			"Host \"bad\"\n" +
			"# OpenSSH doesn't allow this but ...\n" +
			" HostName=bad.tld\"\n");
		assertEquals("good.tld", osc.lookup("good").getHostName());
		assertEquals("gooduser", osc.lookup("good").getUser());
		assertEquals(6007, osc.lookup("good").getPort());
		assertEquals(2222, osc.lookup("multiple").getPort());
		assertEquals(2222, osc.lookup("quoted").getPort());
		assertEquals(2222, osc.lookup("and").getPort());
		assertEquals(2222, osc.lookup("unquoted").getPort());
		assertEquals(2222, osc.lookup("hosts").getPort());
		assertEquals(" spaced\ttld ", osc.lookup("spaced").getHostName());
		assertEquals("bad.tld\"", osc.lookup("bad").getHostName());
	}

	@Test
	public void testAlias_DoesNotMatch() throws Exception {
		config("Host orcz\n" + "\tHostName repo.or.cz\n");
		final Host h = osc.lookup("repo.or.cz");
		assertNotNull(h);
		assertEquals("repo.or.cz", h.getHostName());
		assertEquals("jex_junit", h.getUser());
		assertEquals(22, h.getPort());
		assertNull(h.getIdentityFile());
	}

	@Test
	public void testAlias_OptionsSet() throws Exception {
		config("Host orcz\n" + "\tHostName repo.or.cz\n" + "\tPort 2222\n"
				+ "\tUser jex\n" + "\tIdentityFile .ssh/id_jex\n"
				+ "\tForwardX11 no\n");
		final Host h = osc.lookup("orcz");
		assertNotNull(h);
		assertEquals("repo.or.cz", h.getHostName());
		assertEquals("jex", h.getUser());
		assertEquals(2222, h.getPort());
		assertEquals(new File(home, ".ssh/id_jex"), h.getIdentityFile());
	}

	@Test
	public void testAlias_OptionsKeywordCaseInsensitive() throws Exception {
		config("hOsT orcz\n" + "\thOsTnAmE repo.or.cz\n" + "\tPORT 2222\n"
				+ "\tuser jex\n" + "\tidentityfile .ssh/id_jex\n"
				+ "\tForwardX11 no\n");
		final Host h = osc.lookup("orcz");
		assertNotNull(h);
		assertEquals("repo.or.cz", h.getHostName());
		assertEquals("jex", h.getUser());
		assertEquals(2222, h.getPort());
		assertEquals(new File(home, ".ssh/id_jex"), h.getIdentityFile());
	}

	@Test
	public void testAlias_OptionsInherit() throws Exception {
		config("Host orcz\n" + "\tHostName repo.or.cz\n" + "\n" + "Host *\n"
				+ "\tHostName not.a.host.example.com\n" + "\tPort 2222\n"
				+ "\tUser jex\n" + "\tIdentityFile .ssh/id_jex\n"
				+ "\tForwardX11 no\n");
		final Host h = osc.lookup("orcz");
		assertNotNull(h);
		assertEquals("repo.or.cz", h.getHostName());
		assertEquals("jex", h.getUser());
		assertEquals(2222, h.getPort());
		assertEquals(new File(home, ".ssh/id_jex"), h.getIdentityFile());
	}

	@Test
	public void testAlias_PreferredAuthenticationsDefault() throws Exception {
		final Host h = osc.lookup("orcz");
		assertNotNull(h);
		assertNull(h.getPreferredAuthentications());
	}

	@Test
	public void testAlias_PreferredAuthentications() throws Exception {
		config("Host orcz\n" + "\tPreferredAuthentications publickey\n");
		final Host h = osc.lookup("orcz");
		assertNotNull(h);
		assertEquals("publickey", h.getPreferredAuthentications());
	}

	@Test
	public void testAlias_InheritPreferredAuthentications() throws Exception {
		config("Host orcz\n" + "\tHostName repo.or.cz\n" + "\n" + "Host *\n"
				+ "\tPreferredAuthentications publickey, hostbased\n");
		final Host h = osc.lookup("orcz");
		assertNotNull(h);
		assertEquals("publickey,hostbased", h.getPreferredAuthentications());
	}

	@Test
	public void testAlias_BatchModeDefault() throws Exception {
		final Host h = osc.lookup("orcz");
		assertNotNull(h);
		assertFalse(h.isBatchMode());
	}

	@Test
	public void testAlias_BatchModeYes() throws Exception {
		config("Host orcz\n" + "\tBatchMode yes\n");
		final Host h = osc.lookup("orcz");
		assertNotNull(h);
		assertTrue(h.isBatchMode());
	}

	@Test
	public void testAlias_InheritBatchMode() throws Exception {
		config("Host orcz\n" + "\tHostName repo.or.cz\n" + "\n" + "Host *\n"
				+ "\tBatchMode yes\n");
		final Host h = osc.lookup("orcz");
		assertNotNull(h);
		assertTrue(h.isBatchMode());
	}

	@Test
	public void testAlias_ConnectionAttemptsDefault() throws Exception {
		final Host h = osc.lookup("orcz");
		assertNotNull(h);
		assertEquals(1, h.getConnectionAttempts());
	}

	@Test
	public void testAlias_ConnectionAttempts() throws Exception {
		config("Host orcz\n" + "\tConnectionAttempts 5\n");
		final Host h = osc.lookup("orcz");
		assertNotNull(h);
		assertEquals(5, h.getConnectionAttempts());
	}

	@Test
	public void testAlias_invalidConnectionAttempts() throws Exception {
		config("Host orcz\n" + "\tConnectionAttempts -1\n");
		final Host h = osc.lookup("orcz");
		assertNotNull(h);
		assertEquals(1, h.getConnectionAttempts());
	}

	@Test
	public void testAlias_badConnectionAttempts() throws Exception {
		config("Host orcz\n" + "\tConnectionAttempts xxx\n");
		final Host h = osc.lookup("orcz");
		assertNotNull(h);
		assertEquals(1, h.getConnectionAttempts());
	}
}