package org.arios.net.packet.out;

import org.arios.game.container.ContainerEvent;
import org.arios.game.node.item.Item;
import org.arios.net.packet.IoBuffer;
import org.arios.net.packet.OutgoingPacket;
import org.arios.net.packet.PacketHeader;
import org.arios.net.packet.context.ContainerContext;

/**
 * Represents the outgoing container packet.
 * @author Emperor
 */
public final class ContainerPacket implements OutgoingPacket<ContainerContext> {

    @Override
    public void send(ContainerContext context) {
        IoBuffer buffer = null;
        if (context.isClear()) {
            buffer = new IoBuffer(144);
            buffer.putIntB(context.getInterfaceId() << 16 | context.getChildId());
        } else {
            boolean slotBased = context.getSlots() != null;
            buffer = new IoBuffer(slotBased ? 22 : 105, PacketHeader.SHORT);
            buffer.putShort(context.getInterfaceId());
            buffer.putShort(context.getChildId());
            buffer.putShort(context.getType());
            if (slotBased) {
                for (int slot : context.getSlots()) {
                    buffer.putSmart(slot);
                    Item item = context.getItems()[slot];
                    if (item != null && !item.equals(ContainerEvent.NULL_ITEM)) {
                        buffer.putShort(item.getId() + 1);
                        int amount = item.getAmount();
                        if (amount < 0 || amount > 254) {
                            buffer.put(255).putInt(amount);
                        } else {
                            buffer.put(amount);
                        }
                    } else {
                        buffer.putShort(0);
                    }
                }
            } else {
                buffer.putShort(context.getItems().length);
                for (Item item : context.getItems())
                    if (item != null) {
                        int amount = item.getAmount();
                        if (amount < 0 || amount > 254) {
                            buffer.putS(255).putInt(amount);
                        } else {
                            buffer.putS(amount);
                        }
                        buffer.putShort(item.getId() + 1);
                    } else {
                        buffer.putS(0).putShort(0);
                    }
            }
        }
        context.getPlayer().getSession().write(buffer);
    }

}