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/**
 *  BlueCove - Java library for Bluetooth
 *  Copyright (C) 2008-2009 Vlad Skarzhevskyy
 *
 *  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.
 *
 *  @author vlads
 *  @version $Id$
 */
package net.sf.bluecove.obex;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import javax.microedition.io.Connector;
import javax.obex.Authenticator;
import javax.obex.ClientSession;
import javax.obex.HeaderSet;
import javax.obex.Operation;
import javax.obex.PasswordAuthentication;
import javax.obex.ResponseCodes;
import javax.obex.ServerRequestHandler;

import com.intel.bluetooth.DebugLog;
import com.intel.bluetooth.obex.BlueCoveOBEX;

public class OBEXAuthenticatorTest extends OBEXAuthenticationBaseTestCase {

	private byte[] serverData;
	
	private volatile ChallengeData serverChallenge;

	@Override
	protected void setUp() throws Exception {
		super.setUp();
		serverData = null;
		serverChallenge = new ChallengeData("SrvTest", true, true);
	}

	private class RequestHandler extends ServerRequestHandler {

		private boolean authenticationRequested = false;

		@Override
		public int onConnect(HeaderSet request, HeaderSet reply) {
			try {
				DebugLog.debug("==TEST== Server onConnect");
				Long when = (Long) request.getHeader(testHeaderID);
				if (!authenticationRequested && When.onConnect.ordinal() == when) {
					reply.createAuthenticationChallenge(serverChallenge.realm, serverChallenge.userID,
							serverChallenge.access);
					authenticationRequested = true;
					return ResponseCodes.OBEX_HTTP_UNAUTHORIZED;
				}
			} catch (IOException e) {
				DebugLog.error("==TEST== Server", e);
				return ResponseCodes.OBEX_HTTP_INTERNAL_ERROR;
			}
			return ResponseCodes.OBEX_HTTP_OK;
		}

		@Override
		public int onPut(Operation op) {
			try {
				serverRequestHandlerInvocations++;
				DebugLog
						.debug("==TEST== Server onPut serverRequestHandlerInvocations", serverRequestHandlerInvocations);
				serverHeaders = op.getReceivedHeaders();

				Long when = (Long) serverHeaders.getHeader(testHeaderID);
				if (!authenticationRequested && When.onPut.ordinal() == when) {
					HeaderSet reply = createHeaderSet();
					reply.createAuthenticationChallenge(serverChallenge.realm, serverChallenge.userID,
							serverChallenge.access);
					op.sendHeaders(reply);
					authenticationRequested = true;
					return ResponseCodes.OBEX_HTTP_UNAUTHORIZED;
				}

				InputStream is = op.openInputStream();
				ByteArrayOutputStream buf = new ByteArrayOutputStream();
				int data;
				while ((data = is.read()) != -1) {
					buf.write(data);
				}
				serverData = buf.toByteArray();
				DebugLog.debug("==TEST== Server close Operation");
				op.close();
				op = null;
				serverResponseCode = ResponseCodes.OBEX_HTTP_OK;
				DebugLog.debug("==TEST== Server returns " + BlueCoveOBEX.obexResponseCodes(serverResponseCode));
				return serverResponseCode;
			} catch (IOException e) {
				DebugLog.error("==TEST== Server", e);
				return ResponseCodes.OBEX_HTTP_UNAVAILABLE;
			} finally {
				try {
					if (op != null) {
						op.close();
					}
				} catch (IOException e) {
					DebugLog.error("==TEST== Server close", e);
					return ResponseCodes.OBEX_HTTP_UNAVAILABLE;
				}
			}
		}

		@Override
		public int onGet(Operation op) {
			try {
				serverRequestHandlerInvocations++;
				DebugLog
						.debug("==TEST== Server onGet serverRequestHandlerInvocations", serverRequestHandlerInvocations);
				serverHeaders = op.getReceivedHeaders();
				Long when = (Long) serverHeaders.getHeader(testHeaderID);
				if (!authenticationRequested && When.onGet.ordinal() == when) {
					HeaderSet reply = createHeaderSet();
					reply.createAuthenticationChallenge(serverChallenge.realm, serverChallenge.userID,
							serverChallenge.access);
					op.sendHeaders(reply);
					authenticationRequested = true;
					return ResponseCodes.OBEX_HTTP_UNAUTHORIZED;
				}
				serverResponseCode = ResponseCodes.OBEX_HTTP_OK;
				DebugLog.debug("==TEST== Server returns " + BlueCoveOBEX.obexResponseCodes(serverResponseCode));
				return serverResponseCode;
			} catch (IOException e) {
				DebugLog.error("==TEST== Server", e);
				return ResponseCodes.OBEX_HTTP_UNAVAILABLE;
			} finally {
				try {
					op.close();
				} catch (IOException e) {
					DebugLog.error("==TEST== Server close", e);
					return ResponseCodes.OBEX_HTTP_UNAVAILABLE;
				}
			}
		}

		public int onSetPath(HeaderSet request, HeaderSet reply, boolean backup, boolean create) {
		    serverRequestHandlerInvocations++;
		    serverHeaders = request;
            Long when;
            try {
                when = (Long) request.getHeader(testHeaderID);
            } catch (IOException e) {
                DebugLog.error("==TEST== Server", e);
                return ResponseCodes.OBEX_HTTP_UNAVAILABLE;
            }
            if (!authenticationRequested && When.onSetPath.ordinal() == when) {
                reply.createAuthenticationChallenge(serverChallenge.realm, serverChallenge.userID,
                        serverChallenge.access);
                authenticationRequested = true;
                return ResponseCodes.OBEX_HTTP_UNAUTHORIZED;
            }
		    serverResponseCode = ResponseCodes.OBEX_HTTP_OK;
            DebugLog.debug("==TEST== Server returns " + BlueCoveOBEX.obexResponseCodes(serverResponseCode));
            return serverResponseCode;
	    }
		
		public void onAuthenticationFailure(byte[] userName) {
			DebugLog.debug("==TEST== Server onAuthenticationFailure");
			authenticationRequested = false;
		}
	}

	private class ServerRequestAuthenticator implements Authenticator {

		ServerRequestAuthenticator(ServerRequestHandler handler) {

		}

		public PasswordAuthentication onAuthenticationChallenge(String description, boolean isUserIdRequired,
				boolean isFullAccess) {
		    serverOnAuthenticationChallengeCalled++;
			DebugLog.debug("==TEST== Server challenge " + (isUserIdRequired ? "U" : "") + (isFullAccess ? "A" : "")
					+ " " + description);
			return new PasswordAuthentication(userName.getBytes(), getUserPassword(userName));
		}

		public byte[] onAuthenticationResponse(byte[] userName) {
			serverOnAuthenticationResponseCalled++;
			DebugLog.debug("==TEST== Server authenticate user", (userName != null) ? new String(userName) : "{null}");
			return getUserPassword(userName);
		}

	}

	@Override
	protected Authenticator getServerAuthenticator(ServerRequestHandler handler) {
		return new ServerRequestAuthenticator(handler);
	}

	@Override
	protected ServerRequestHandler createRequestHandler() {
		return new RequestHandler();
	}

	private void runPUTOperation(final When whenChallenge, boolean empty) throws IOException {

		now = When.Never;

		authenticatorCalled = When.Never;

		final ChallengeData clientChallenge = new ChallengeData();

		Authenticator auth = new Authenticator() {

			public PasswordAuthentication onAuthenticationChallenge(String description, boolean isUserIdRequired,
					boolean isFullAccess) {
				authenticatorCalled = now;
				clientOnAuthenticationChallengeCalled ++;
				clientChallenge.realm = description;
				clientChallenge.userID = isUserIdRequired;
				clientChallenge.access = isFullAccess;
				DebugLog.debug("==TEST== Client challenge " + (isUserIdRequired ? "U" : "") + (isFullAccess ? "A" : "")
						+ " " + description);
				byte[] password;
				if (isUserIdRequired) {
					password = getUserPassword(userName);
				} else {
					password = getUserPassword((String) null);
				}
				return new PasswordAuthentication(userName.getBytes(), password);
			}

			public byte[] onAuthenticationResponse(byte[] userName) {
				clientOnAuthenticationResponseCalled++;
				DebugLog.debug("==TEST== Client onAuthenticationResponse");
				return null;
			}
		};

		ClientSession clientSession = (ClientSession) Connector.open(selectService(serverUUID));

		clientSession.setAuthenticator(auth);
		HeaderSet hsConnect = clientSession.createHeaderSet();
		hsConnect.setHeader(testHeaderID, new Long(whenChallenge.ordinal()));
		now = When.onConnect;
		HeaderSet hsConnectReply = clientSession.connect(hsConnect);
		int connectCode = hsConnectReply.getResponseCode();
		DebugLog.debug0x("==TEST== Client connect ResponseCode " + BlueCoveOBEX.obexResponseCodes(connectCode) + " = ",
				connectCode);
		assertEquals("connect", ResponseCodes.OBEX_HTTP_OK, connectCode);

		HeaderSet hsOperation = clientSession.createHeaderSet();
		String name = "Hello.txt";
		hsOperation.setHeader(HeaderSet.NAME, name);
		hsOperation.setHeader(testHeaderID, new Long(whenChallenge.ordinal()));

		int responseCode;
		if (whenChallenge == When.onGet) {
			now = When.onGet;
			Operation getOperation = clientSession.get(hsOperation);

			DebugLog.debug("==TEST== Client getResponseCode");
			responseCode = getOperation.getResponseCode();
			DebugLog.debug0x(
					"==TEST== Client GET ResponseCode " + BlueCoveOBEX.obexResponseCodes(responseCode) + " = ",
					responseCode);

			getOperation.close();

		} else if (whenChallenge == When.onSetPath) {
		    now = When.onSetPath;
		    HeaderSet reply = clientSession.setPath(hsOperation, true, true);
		    responseCode = reply.getResponseCode();
		} else {
			now = When.onPut;
			// Create PUT Operation
			Operation putOperation = clientSession.put(hsOperation);

			// Send some text to server
			byte data[] = new byte[0];
			OutputStream os = putOperation.openOutputStream();
			if (!empty) {
				data = simpleData;
				os.write(data);
			}
			os.close();
			DebugLog.debug("==TEST== Client getResponseCode");
			responseCode = putOperation.getResponseCode();
			DebugLog.debug0x(
					"==TEST== Client PUT ResponseCode " + BlueCoveOBEX.obexResponseCodes(responseCode) + " = ",
					responseCode);

			putOperation.close();

			assertEquals("data", data, serverData);
		}

		now = When.Never;

		clientSession.disconnect(null);

		clientSession.close();

		assertEquals("NAME", name, serverHeaders.getHeader(HeaderSet.NAME));

		int invocationsExpected = 1;
		if ((When.onPut == whenChallenge) || (When.onGet == whenChallenge) || (When.onSetPath == whenChallenge)) {
			invocationsExpected++;
		}
		assertEquals("invocations", invocationsExpected, serverRequestHandlerInvocations);

		assertEquals("onAuthenticationChallenge", whenChallenge.name(), authenticatorCalled.name());

		if (When.Never != whenChallenge) {
			assertEquals("Challenge.realm", serverChallenge.realm, clientChallenge.realm);
			assertEquals("Challenge.userID", serverChallenge.userID, clientChallenge.userID);
			assertEquals("Challenge.access", serverChallenge.access, clientChallenge.access);
		}

		int challengeCalledExpected = 1;
		if (When.Never == whenChallenge) {
			challengeCalledExpected = 0;
		}

		assertEquals("serverOnAuthenticationResponseCalled", challengeCalledExpected,
				serverOnAuthenticationResponseCalled);
		
		assertEquals("clientOnAuthenticationChallengeCalled", challengeCalledExpected, clientOnAuthenticationChallengeCalled);

		assertEquals("serverOnAuthenticationChallengeCalled", 0, serverOnAuthenticationChallengeCalled);
        assertEquals("clientOnAuthenticationResponseCalled", 0, clientOnAuthenticationResponseCalled);
        
		assertEquals("ResponseCodes." + BlueCoveOBEX.obexResponseCodes(serverResponseCode), serverResponseCode,
				responseCode);
		assertServerErrors();

	}

	public void testNoChallenge() throws IOException {
		runPUTOperation(When.Never, false);
	}

	public void testChallengeOnConnect() throws IOException {
		runPUTOperation(When.onConnect, false);
	}

	public void testChallengeOnConnectFalseFalse() throws IOException {
		serverChallenge = new ChallengeData("RealmFalseFalse", false, false);
		runPUTOperation(When.onConnect, false);
	}

	public void testChallengeOnPut() throws IOException {
		runPUTOperation(When.onPut, false);
	}

	public void testChallengeOnPutEmpty() throws IOException {
		runPUTOperation(When.onPut, true);
	}

	public void testChallengeOnGet() throws IOException {
		runPUTOperation(When.onGet, false);
	}

    public void testChallengeOnSetPath() throws IOException {
        runPUTOperation(When.onSetPath, false);
    }
}