/*
 *  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
 *  
 *    https://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.api.ldap.model.csn;


import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.junit.jupiter.api.Assertions.fail;

import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;

import org.apache.directory.api.ldap.model.csn.Csn;
import org.apache.directory.api.ldap.model.csn.InvalidCSNException;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.parallel.Execution;
import org.junit.jupiter.api.parallel.ExecutionMode;


/**
 * 
 * Test for the CSN class
 *
 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
 */
@Execution(ExecutionMode.CONCURRENT)
public class CsnTest
{
    private static final SimpleDateFormat SDF = new SimpleDateFormat( "yyyyMMddHHmmss.123456'Z'", Locale.ROOT );

    private static final TimeZone UTC_TIME_ZONE = TimeZone.getTimeZone( "UTC" );
    
    static
    {
        SDF.setTimeZone( UTC_TIME_ZONE );
    }


    @Test
    public void testCSN()
    {
        synchronized ( SDF )
        {
            long ts = System.currentTimeMillis();

            Csn csn = new Csn( SDF.format( new Date( ts ) ) + "#123456#abc#654321" );

            assertEquals( ts / 1000, csn.getTimestamp() / 1000 );

            // ALl the value are converted from hex to int
            assertEquals( 1193046, csn.getChangeCount() );
            assertEquals( 6636321, csn.getOperationNumber() );
            assertEquals( 2748, csn.getReplicaId() );
        }
    }


    @Test
    public void testCSNNull()
    {
        try
        {
            new Csn( ( String ) null );
            fail();
        }
        catch ( InvalidCSNException ice )
        {
            assertTrue( true );
        }
    }


    @Test
    public void testCSNEmpty()
    {
        try
        {
            new Csn( "" );
            fail();
        }
        catch ( InvalidCSNException ice )
        {
            assertTrue( true );
        }
    }


    @Test
    public void testCSNTimestampOnly()
    {
        try
        {
            synchronized ( SDF )
            {
                new Csn( SDF.format( new Date( System.currentTimeMillis() ) ) );
            }

            fail();
        }
        catch ( InvalidCSNException ice )
        {
            assertTrue( true );
        }
    }


    @Test
    public void testCSNInvalidTS()
    {
        try
        {
            // A missing 'Z'
            new Csn( "20010101000000.000000#000001#abc#000001" );
            fail();
        }
        catch ( InvalidCSNException ice )
        {
            assertTrue( true );
        }

        try
        {
            // Missing milliseconds
            new Csn( "20000101000000.Z#000001#abc#000001" );
            fail();
        }
        catch ( InvalidCSNException ice )
        {
            assertTrue( true );
        }

        try
        {
            // Missing dot
            new Csn( "20010101000000000000Z#0x1#abc#0x1" );
            fail();
        }
        catch ( InvalidCSNException ice )
        {
            assertTrue( true );
        }

        try
        {
            // Missing dot and millis
            new Csn( "20010101000000Z#000001#abc#000001" );
            fail();
        }
        catch ( InvalidCSNException ice )
        {
            assertTrue( true );
        }

        try
        {
            // Invalid date
            new Csn( "200A01010000Z#000001#abc#000001" );
            fail();
        }
        catch ( InvalidCSNException ice )
        {
            assertTrue( true );
        }
    }


    @Test
    public void testCSNNoTimestamp()
    {
        try
        {
            new Csn( "#000001#abc#000001" );
            fail();
        }
        catch ( InvalidCSNException ice )
        {
            assertTrue( true );
        }
    }


    @Test
    public void testCSNNoChangeCount()
    {
        try
        {
            new Csn( "20010101000000.000000Z##abc#000001" );
            fail();
        }
        catch ( InvalidCSNException ice )
        {
            assertTrue( true );
        }
    }


    @Test
    public void testCSNInvalidChangeCount()
    {
        try
        {
            new Csn( "20010101000000.000000Z#00#abc#000001" );
            fail();
        }
        catch ( InvalidCSNException ice )
        {
            assertTrue( true );
        }

        try
        {
            new Csn( "20010101000000.000000Z#00000G#abc#000001" );
            fail();
        }
        catch ( InvalidCSNException ice )
        {
            assertTrue( true );
        }
    }


    @Test
    public void testCSNNoReplica()
    {
        try
        {
            new Csn( "20010101000000.000000Z#000001##000001" );
            fail();
        }
        catch ( InvalidCSNException ice )
        {
            assertTrue( true );
        }
    }


    @Test
    public void testCSNInvalidReplica()
    {
        try
        {
            new Csn( "20010101000000.000000Z#000001#a12-b3é#000001" );
            fail();
        }
        catch ( InvalidCSNException ice )
        {
            assertTrue( true );
        }
    }


    @Test
    public void testCSNNoOpNumber()
    {
        try
        {
            new Csn( "20010101000000.000000Z#000000#abc" );
            fail();
        }
        catch ( InvalidCSNException ice )
        {
            assertTrue( true );
        }

        try
        {
            new Csn( "20010101000000.000000Z#000000#abc#  " );
            fail();
        }
        catch ( InvalidCSNException ice )
        {
            assertTrue( true );
        }
    }


    @Test
    public void testCSNInvalidOpNumber()
    {
        try
        {
            new Csn( "20010101000000.000000Z#000000#abc#000zzz" );
            fail();
        }
        catch ( InvalidCSNException ice )
        {
            assertTrue( true );
        }

        try
        {
            new Csn( "20010101000000.000000Z#000000#abc#00000" );
            fail();
        }
        catch ( InvalidCSNException ice )
        {
            assertTrue( true );
        }

        try
        {
            new Csn( "20010101000000.000000Z#000000#abc#" );
            fail();
        }
        catch ( InvalidCSNException ice )
        {
            assertTrue( true );
        }

        try
        {
            new Csn( "20010101000000.000000Z#000000#abc#00000G" );
            fail();
        }
        catch ( InvalidCSNException ice )
        {
            assertTrue( true );
        }
    }


    @Test
    public void testCSNToBytes()
    {
        Csn csn = new Csn( "20010101000000.000000Z#000000#abc#000001" );

        byte[] bytes = csn.getBytes();

        byte[] expected = new byte[]
            {
                '2', '0', '0', '1', '0', '1', '0', '1',
                '0', '0', '0', '0', '0', '0', '.', '0',
                '0', '0', '0', '0', '0', 'Z', '#', '0',
                '0', '0', '0', '0', '0', '#', 'a', 'b',
                'c', '#', '0', '0', '0', '0', '0', '1'
        };

        assertTrue( Arrays.equals( expected, bytes ) );

        Csn deserializedCSN = new Csn( bytes );
        assertEquals( csn, deserializedCSN );
    }
    
    
    @Test 
    public void testIsValidCsn()
    {
        assertTrue( Csn.isValid( "20100111202217.914000Z#000000#000#000000" ) );
    }
}