/*
 *  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. 
 *  
 */
package org.apache.directory.shared.ldap.extras.extended.ads_impl;


import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

import java.nio.ByteBuffer;

import org.apache.directory.shared.asn1.DecoderException;
import org.apache.directory.shared.asn1.EncoderException;
import org.apache.directory.shared.asn1.ber.Asn1Decoder;
import org.apache.directory.shared.ldap.extras.extended.ads_impl.GracefulShutdown;
import org.apache.directory.shared.ldap.extras.extended.ads_impl.GracefulShutdownContainer;
import org.apache.directory.shared.util.Strings;
import org.junit.Test;
import org.junit.runner.RunWith;

import com.mycila.junit.concurrent.Concurrency;
import com.mycila.junit.concurrent.ConcurrentJunitRunner;


/**
 * Test the GracefulShutdownTest codec
 * 
 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
 */
@RunWith(ConcurrentJunitRunner.class)
@Concurrency()
public class GracefulShutdownTest
{
    /**
     * Test the decoding of a GracefulShutdown
     */
    @Test
    public void testDecodeGracefulShutdownSuccess()
    {
        Asn1Decoder decoder = new Asn1Decoder();
        ByteBuffer bb = ByteBuffer.allocate( 0x08 );
        bb.put( new byte[]
            { 0x30, 0x06, // GracefulShutdown ::= SEQUENCE {
                0x02, 0x01, 0x01, // timeOffline INTEGER (0..720) DEFAULT 0,
                ( byte ) 0x80, 0x01, 0x01 // delay INTEGER (0..86400) DEFAULT
                                            // 0
            // }
            } );

        String decodedPdu = Strings.dumpBytes(bb.array());
        bb.flip();

        GracefulShutdownContainer container = new GracefulShutdownContainer();

        try
        {
            decoder.decode( bb, container );
        }
        catch ( DecoderException de )
        {
            de.printStackTrace();
            fail( de.getMessage() );
        }

        GracefulShutdown gracefulShutdown = container.getGracefulShutdown();
        assertEquals( 1, gracefulShutdown.getTimeOffline() );
        assertEquals( 1, gracefulShutdown.getDelay() );

        // Check the length
        assertEquals( 0x08, gracefulShutdown.computeLength() );

        // Check the encoding
        try
        {
            ByteBuffer bb1 = gracefulShutdown.encode();

            String encodedPdu = Strings.dumpBytes(bb1.array());

            assertEquals( encodedPdu, decodedPdu );
        }
        catch ( EncoderException ee )
        {
            ee.printStackTrace();
            fail( ee.getMessage() );
        }
    }


    /**
     * Test the decoding of a GracefulShutdown with a timeOffline only
     */
    @Test
    public void testDecodeGracefulShutdownTimeOffline()
    {
        Asn1Decoder decoder = new Asn1Decoder();
        ByteBuffer bb = ByteBuffer.allocate( 0x05 );
        bb.put( new byte[]
            { 0x30, 0x03, // GracefulShutdown ::= SEQUENCE {
                0x02, 0x01, 0x01 // timeOffline INTEGER (0..720) DEFAULT 0,
            } );

        String decodedPdu = Strings.dumpBytes(bb.array());
        bb.flip();

        GracefulShutdownContainer container = new GracefulShutdownContainer();

        try
        {
            decoder.decode( bb, container );
        }
        catch ( DecoderException de )
        {
            de.printStackTrace();
            fail( de.getMessage() );
        }

        GracefulShutdown gracefulShutdown = container.getGracefulShutdown();
        assertEquals( 1, gracefulShutdown.getTimeOffline() );
        assertEquals( 0, gracefulShutdown.getDelay() );

        // Check the length
        assertEquals( 0x05, gracefulShutdown.computeLength() );

        // Check the encoding
        try
        {
            ByteBuffer bb1 = gracefulShutdown.encode();

            String encodedPdu = Strings.dumpBytes(bb1.array());

            assertEquals( encodedPdu, decodedPdu );
        }
        catch ( EncoderException ee )
        {
            ee.printStackTrace();
            fail( ee.getMessage() );
        }
    }


    /**
     * Test the decoding of a GracefulShutdown with a delay only
     */
    @Test
    public void testDecodeGracefulShutdownDelay()
    {
        Asn1Decoder decoder = new Asn1Decoder();
        ByteBuffer bb = ByteBuffer.allocate( 0x05 );
        bb.put( new byte[]
            { 0x30, 0x03, // GracefulShutdown ::= SEQUENCE {
                ( byte ) 0x80, 0x01, 0x01 // delay INTEGER (0..86400) DEFAULT
                                            // 0
            } );

        String decodedPdu = Strings.dumpBytes(bb.array());
        bb.flip();

        GracefulShutdownContainer container = new GracefulShutdownContainer();

        try
        {
            decoder.decode( bb, container );
        }
        catch ( DecoderException de )
        {
            de.printStackTrace();
            fail( de.getMessage() );
        }

        GracefulShutdown gracefulShutdown = container.getGracefulShutdown();
        assertEquals( 0, gracefulShutdown.getTimeOffline() );
        assertEquals( 1, gracefulShutdown.getDelay() );

        // Check the length
        assertEquals( 0x05, gracefulShutdown.computeLength() );

        // Check the encoding
        try
        {
            ByteBuffer bb1 = gracefulShutdown.encode();

            String encodedPdu = Strings.dumpBytes(bb1.array());

            assertEquals( encodedPdu, decodedPdu );
        }
        catch ( EncoderException ee )
        {
            ee.printStackTrace();
            fail( ee.getMessage() );
        }
    }


    /**
     * Test the decoding of a empty GracefulShutdown
     */
    @Test
    public void testDecodeGracefulShutdownEmpty()
    {
        Asn1Decoder decoder = new Asn1Decoder();
        ByteBuffer bb = ByteBuffer.allocate( 0x02 );
        bb.put( new byte[]
            { 0x30, 0x00 // GracefulShutdown ::= SEQUENCE {
            } );

        String decodedPdu = Strings.dumpBytes(bb.array());
        bb.flip();

        GracefulShutdownContainer container = new GracefulShutdownContainer();

        try
        {
            decoder.decode( bb, container );
        }
        catch ( DecoderException de )
        {
            de.printStackTrace();
            fail( de.getMessage() );
        }

        GracefulShutdown gracefulShutdown = container.getGracefulShutdown();
        assertEquals( 0, gracefulShutdown.getTimeOffline() );
        assertEquals( 0, gracefulShutdown.getDelay() );

        // Check the length
        assertEquals( 0x02, gracefulShutdown.computeLength() );

        // Check the encoding
        try
        {
            ByteBuffer bb1 = gracefulShutdown.encode();

            String encodedPdu = Strings.dumpBytes(bb1.array());

            assertEquals( encodedPdu, decodedPdu );
        }
        catch ( EncoderException ee )
        {
            ee.printStackTrace();
            fail( ee.getMessage() );
        }
    }


    /**
     * Test the decoding of a GracefulShutdown with a delay above 128
     */
    @Test
    public void testDecodeGracefulShutdownDelayHigh()
    {
        Asn1Decoder decoder = new Asn1Decoder();
        ByteBuffer bb = ByteBuffer.allocate( 0x06 );
        bb.put( new byte[]
            { 0x30, 0x04, // GracefulShutdown ::= SEQUENCE {
                ( byte ) 0x80, 0x02, 0x01, ( byte ) 0xF4 // delay INTEGER
                                                            // (0..86400)
                                                            // DEFAULT 0
            } );

        String decodedPdu = Strings.dumpBytes(bb.array());
        bb.flip();

        GracefulShutdownContainer container = new GracefulShutdownContainer();

        try
        {
            decoder.decode( bb, container );
        }
        catch ( DecoderException de )
        {
            de.printStackTrace();
            fail( de.getMessage() );
        }

        GracefulShutdown gracefulShutdown = container.getGracefulShutdown();
        assertEquals( 0, gracefulShutdown.getTimeOffline() );
        assertEquals( 500, gracefulShutdown.getDelay() );

        // Check the length
        assertEquals( 0x06, gracefulShutdown.computeLength() );

        // Check the encoding
        try
        {
            ByteBuffer bb1 = gracefulShutdown.encode();

            String encodedPdu = Strings.dumpBytes(bb1.array());

            assertEquals( encodedPdu, decodedPdu );
        }
        catch ( EncoderException ee )
        {
            ee.printStackTrace();
            fail( ee.getMessage() );
        }
    }


    /**
     * Test the decoding of a GracefulShutdown with a delay equals 32767
     */
    @Test
    public void testDecodeGracefulShutdownDelay32767()
    {
        Asn1Decoder decoder = new Asn1Decoder();
        ByteBuffer bb = ByteBuffer.allocate( 0x06 );
        bb.put( new byte[]
            { 0x30, 0x04, // GracefulShutdown ::= SEQUENCE {
                ( byte ) 0x80, 0x02, 0x7F, ( byte ) 0xFF // delay INTEGER
                                                            // (0..86400)
                                                            // DEFAULT 0
            } );

        String decodedPdu = Strings.dumpBytes(bb.array());
        bb.flip();

        GracefulShutdownContainer container = new GracefulShutdownContainer();

        try
        {
            decoder.decode( bb, container );
        }
        catch ( DecoderException de )
        {
            de.printStackTrace();
            fail( de.getMessage() );
        }

        GracefulShutdown gracefulShutdown = container.getGracefulShutdown();
        assertEquals( 0, gracefulShutdown.getTimeOffline() );
        assertEquals( 32767, gracefulShutdown.getDelay() );

        // Check the length
        assertEquals( 0x06, gracefulShutdown.computeLength() );

        // Check the encoding
        try
        {
            ByteBuffer bb1 = gracefulShutdown.encode();

            String encodedPdu = Strings.dumpBytes(bb1.array());

            assertEquals( encodedPdu, decodedPdu );
        }
        catch ( EncoderException ee )
        {
            ee.printStackTrace();
            fail( ee.getMessage() );
        }
    }


    /**
     * Test the decoding of a GracefulShutdown with a delay above 32768
     */
    @Test
    public void testDecodeGracefulShutdownDelay32768()
    {
        Asn1Decoder decoder = new Asn1Decoder();
        ByteBuffer bb = ByteBuffer.allocate( 0x07 );
        bb.put( new byte[]
            { 0x30, 0x05, // GracefulShutdown ::= SEQUENCE {
                ( byte ) 0x80, 0x03, 0x00, ( byte ) 0x80, ( byte ) 0x00 // delay
                                                                        // INTEGER
                                                                        // (0..86400)
                                                                        // DEFAULT
                                                                        // 0
            } );

        String decodedPdu = Strings.dumpBytes(bb.array());
        bb.flip();

        GracefulShutdownContainer container = new GracefulShutdownContainer();

        try
        {
            decoder.decode( bb, container );
        }
        catch ( DecoderException de )
        {
            de.printStackTrace();
            fail( de.getMessage() );
        }

        GracefulShutdown gracefulShutdown = container.getGracefulShutdown();
        assertEquals( 0, gracefulShutdown.getTimeOffline() );
        assertEquals( 32768, gracefulShutdown.getDelay() );

        // Check the length
        assertEquals( 0x07, gracefulShutdown.computeLength() );

        // Check the encoding
        try
        {
            ByteBuffer bb1 = gracefulShutdown.encode();

            String encodedPdu = Strings.dumpBytes(bb1.array());

            assertEquals( encodedPdu, decodedPdu );
        }
        catch ( EncoderException ee )
        {
            ee.printStackTrace();
            fail( ee.getMessage() );
        }
    }


    // Defensive tests

    /**
     * Test the decoding of a GracefulShutdown with a timeOffline off limit
     */
    @Test
    public void testDecodeGracefulShutdownTimeOfflineOffLimit()
    {
        Asn1Decoder decoder = new Asn1Decoder();
        ByteBuffer bb = ByteBuffer.allocate( 0x06 );
        bb.put( new byte[]
            { 0x30, 0x04, // GracefulShutdown ::= SEQUENCE {
                0x02, 0x02, 0x03, ( byte ) 0xE8 // timeOffline INTEGER (0..720)
                                                // DEFAULT 0,
            } );
        bb.flip();

        GracefulShutdownContainer container = new GracefulShutdownContainer();

        try
        {
            decoder.decode( bb, container );
        }
        catch ( DecoderException de )
        {
            assertTrue( true );
            return;
        }

        fail( "We should not reach this point" );
    }


    /**
     * Test the decoding of a GracefulShutdown with a delay off limit
     */
    @Test
    public void testDecodeGracefulShutdownDelayOffLimit()
    {
        Asn1Decoder decoder = new Asn1Decoder();
        ByteBuffer bb = ByteBuffer.allocate( 0x0b );
        bb.put( new byte[]
            { 0x30, 0x05, // GracefulShutdown ::= SEQUENCE {
                ( byte ) 0x80, 0x03, 0x01, ( byte ) 0x86, ( byte ) 0xA0 // delay
                                                                        // INTEGER
                                                                        // (0..86400)
                                                                        // DEFAULT
                                                                        // 0
            } );
        bb.flip();

        GracefulShutdownContainer container = new GracefulShutdownContainer();

        try
        {
            decoder.decode( bb, container );
        }
        catch ( DecoderException de )
        {
            assertTrue( true );
            return;
        }

        fail( "We should not reach this point" );
    }


    /**
     * Test the decoding of a GracefulShutdown with an empty TimeOffline
     */
    @Test
    public void testDecodeGracefulShutdownTimeOfflineEmpty()
    {
        Asn1Decoder decoder = new Asn1Decoder();
        ByteBuffer bb = ByteBuffer.allocate( 0x0b );
        bb.put( new byte[]
            { 0x30, 0x02, // GracefulShutdown ::= SEQUENCE {
                0x02, 0x00 // timeOffline INTEGER (0..720) DEFAULT 0,
            } );
        bb.flip();

        GracefulShutdownContainer container = new GracefulShutdownContainer();

        try
        {
            decoder.decode( bb, container );
        }
        catch ( DecoderException de )
        {
            assertTrue( true );
            return;
        }

        fail( "We should not reach this point" );
    }


    /**
     * Test the decoding of a GracefulShutdown with an empty delay
     */
    @Test
    public void testDecodeGracefulShutdownDelayEmpty()
    {
        Asn1Decoder decoder = new Asn1Decoder();
        ByteBuffer bb = ByteBuffer.allocate( 0x0b );
        bb.put( new byte[]
            { 0x30, 0x02, // GracefulShutdown ::= SEQUENCE {
                ( byte ) 0x80, 0x00 // delay INTEGER (0..86400) DEFAULT 0
            } );
        bb.flip();

        GracefulShutdownContainer container = new GracefulShutdownContainer();

        try
        {
            decoder.decode( bb, container );
        }
        catch ( DecoderException de )
        {
            assertTrue( true );
            return;
        }

        fail( "We should not reach this point" );
    }
}