/*******************************************************************************
 * Copyright (C) 2013 JMaNGOS <http://jmangos.org/>
 * 
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 * 
 * You should have received a copy of the GNU General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
package org.jmangos.tools.dbc.dataholder;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.charset.CharacterCodingException;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;

import javolution.io.Struct;

public class DBCBaseStruct extends Struct {

    public final static int HEADER_SIZE = 20;
    protected int stringBufPos;
    private int lang = -1;

    protected static final Class<?> INTERNALSTRING = new InternalString[0].getClass();

    public class InternalString extends Member {

        private final byte[] string = new byte[2024];
        private final CharsetDecoder decoder = Charset.forName("UTF-8").newDecoder();

        public InternalString() {

            super(32, 4);
        }

        public String get() {

            int i = 0;
            final int index = getByteBufferPosition() + offset();
            for (; (this.string[i] =
                    getByteBuffer().get(
                            i + DBCBaseStruct.this.stringBufPos + getByteBuffer().getInt(index))) != 0; i++) {}
            try {
                return this.decoder.decode(ByteBuffer.wrap(this.string, 0, i)).toString();
            } catch (final CharacterCodingException e) {
                e.printStackTrace();
            }
            return "";
        }

        @Override
        public String toString() {

            return get();
        }

    }

    @Override
    public ByteOrder byteOrder() {

        return ByteOrder.LITTLE_ENDIAN;
    }

    public class MultiInternalString extends Member {

        private final byte[] string = new byte[2024];
        private final CharsetDecoder decoder = Charset.forName("UTF-8").newDecoder();

        public MultiInternalString() {

            super(32 * 17, 4);
        }

        public String get() {

            int i = 0;
            if (DBCBaseStruct.this.lang < 0) {
                for (int j = 0; j < 16; j++) {
                    if (getByteBuffer().getInt(getByteBufferPosition() + offset() + (4 * j)) > 0) {
                        DBCBaseStruct.this.lang = j;
                        break;
                    }
                }

            }
            if (DBCBaseStruct.this.lang < 0) {
                return "";
            }
            for (; (this.string[i] =
                    getByteBuffer().get(
                            i +
                                DBCBaseStruct.this.stringBufPos +
                                getByteBuffer().getInt(
                                        getByteBufferPosition() +
                                            offset() +
                                            (4 * DBCBaseStruct.this.lang)))) != 0; i++) {}
            try {
                return this.decoder.decode(ByteBuffer.wrap(this.string, 0, i)).toString();
            } catch (final CharacterCodingException e) {
                e.printStackTrace();
            }
            return "";
        }

        @Override
        public String toString() {

            return get();
        }

    }

    public DBCBaseStruct() {

        super();
    }

}