/*
 * 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.directmemory.lightning.io;

import java.io.IOException;
import java.io.OutputStream;
import java.nio.ByteOrder;

import org.apache.directmemory.lightning.Target;
import org.apache.directmemory.lightning.internal.io.ByteOrderUtils;
import org.apache.directmemory.lightning.internal.util.UnicodeUtil;

public class OutputStreamTarget
    implements Target
{

    private final OutputStream stream;

    private final ByteOrder byteOrder;

    private long writtenBytes = 0;

    public OutputStreamTarget( OutputStream stream )
    {
        this( stream, ByteOrder.BIG_ENDIAN );
    }

    public OutputStreamTarget( OutputStream stream, ByteOrder byteOrder )
    {
        this.stream = stream;
        this.byteOrder = byteOrder;
    }

    @Override
    public ByteOrder byteOrder()
    {
        return byteOrder;
    }

    @Override
    public long writtenBytes()
    {
        return writtenBytes;
    }

    @Override
    public void writeBytes( byte[] bytes )
        throws IOException
    {
        writeBytes( bytes, 0, bytes.length );
    }

    @Override
    public void writeBytes( byte[] bytes, int offset, int length )
        throws IOException
    {
        stream.write( bytes, offset, length );
        writtenBytes += ( length - offset );
    }

    @Override
    public void writeBoolean( boolean value )
        throws IOException
    {
        writeByte( (byte) ( value ? 1 : 0 ) );
    }

    @Override
    public void writeString( String value )
        throws IOException
    {
        UnicodeUtil.UTF16toUTF8( value, this );
    }

    @Override
    public void writeByte( byte value )
        throws IOException
    {
        stream.write( value );
        writtenBytes++;
    }

    @Override
    public void writeUnsignedByte( short value )
        throws IOException
    {
        stream.write( (byte) value );
        writtenBytes++;
    }

    @Override
    public void writeShort( short value )
        throws IOException
    {
        ByteOrderUtils.putShort( value, this, byteOrder == ByteOrder.BIG_ENDIAN );
        writtenBytes += 2;
    }

    @Override
    public void writeChar( char value )
        throws IOException
    {
        writeShort( (short) value );
    }

    @Override
    public void writeInt( int value )
        throws IOException
    {
        ByteOrderUtils.putInt( value, this, byteOrder == ByteOrder.BIG_ENDIAN );
        writtenBytes += 4;
    }

    @Override
    public void writeLong( long value )
        throws IOException
    {
        ByteOrderUtils.putLong( value, this, byteOrder == ByteOrder.BIG_ENDIAN );
        writtenBytes += 8;
    }

    @Override
    public void writeFloat( float value )
        throws IOException
    {
        writeInt( Float.floatToIntBits( value ) );
    }

    @Override
    public void writeDouble( double value )
        throws IOException
    {
        writeLong( Double.doubleToLongBits( value ) );
    }

    @Override
    public void clear()
        throws IOException
    {
        throw new UnsupportedOperationException( "OutputStreamTarget cannot be reused" );
    }

    @Override
    public void free()
        throws IOException
    {
    }

}