/*
 *  The ManaPlus Client
 *  Copyright (C) 2004-2009  The Mana World Development Team
 *  Copyright (C) 2009-2010  The Mana Developers
 *  Copyright (C) 2011-2015  The ManaPlus Developers
 *
 *  This file is part of The ManaPlus Client.
 *
 *  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
 *  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/>.
 */

#include "net/eathena/tradehandler.h"

#include "inventory.h"
#include "item.h"
#include "notifymanager.h"

#include "being/playerinfo.h"

#include "gui/windows/tradewindow.h"

#include "net/eathena/messageout.h"
#include "net/eathena/protocol.h"

#include "net/ea/eaprotocol.h"

#include "resources/notifytypes.h"

#include "utils/stringutils.h"

#include "debug.h"

extern Net::TradeHandler *tradeHandler;

namespace EAthena
{
int TradeHandler::mQuantity = 0;
int TradeHandler::mItemIndex = -1;

TradeHandler::TradeHandler() :
    MessageHandler(),
    Ea::TradeHandler()
{
    static const uint16_t _messages[] =
    {
        SMSG_TRADE_REQUEST,
        SMSG_TRADE_RESPONSE,
        SMSG_TRADE_ITEM_ADD,
        SMSG_TRADE_ITEM_ADD_RESPONSE,
        SMSG_TRADE_OK,
        SMSG_TRADE_CANCEL,
        SMSG_TRADE_COMPLETE,
        SMSG_TRADE_UNDO,
        0
    };
    handledMessages = _messages;
    tradeHandler = this;
    mItemIndex = -1;
    mQuantity = 0;
}


void TradeHandler::handleMessage(Net::MessageIn &msg)
{
    switch (msg.getId())
    {
        case SMSG_TRADE_REQUEST:
            processTradeRequest(msg);
            break;

        case SMSG_TRADE_RESPONSE:
            processTradeResponse(msg);
            break;

        case SMSG_TRADE_ITEM_ADD:
            processTradeItemAdd(msg);
            break;

        case SMSG_TRADE_ITEM_ADD_RESPONSE:
            processTradeItemAddResponse(msg);
            break;

        case SMSG_TRADE_OK:
            processTradeOk(msg);
            break;

        case SMSG_TRADE_CANCEL:
            processTradeCancel(msg);
            break;

        case SMSG_TRADE_COMPLETE:
            processTradeComplete(msg);
            break;

        case SMSG_TRADE_UNDO:
            processTradeUndo(msg);
            break;

        default:
            break;
    }
}

void TradeHandler::request(const Being *const being) const
{
    if (!being)
        return;

    createOutPacket(CMSG_TRADE_REQUEST);
    outMsg.writeInt32(being->getId(), "player id");
}

void TradeHandler::respond(const bool accept) const
{
    if (!accept)
        PlayerInfo::setTrading(false);

    createOutPacket(CMSG_TRADE_RESPONSE);
    outMsg.writeInt8(static_cast<int8_t>(accept ? 3 : 4), "accept");
}

void TradeHandler::addItem(const Item *const item, const int amount) const
{
    if (!item)
        return;

    mItemIndex = item->getInvIndex();
    mQuantity = amount;
    createOutPacket(CMSG_TRADE_ITEM_ADD_REQUEST);
    outMsg.writeInt16(static_cast<int16_t>(mItemIndex + INVENTORY_OFFSET),
        "index");
    outMsg.writeInt32(amount, "amount");
}

void TradeHandler::setMoney(const int amount) const
{
    createOutPacket(CMSG_TRADE_ITEM_ADD_REQUEST);
    outMsg.writeInt16(0, "index");
    outMsg.writeInt32(amount, "amount");
}

void TradeHandler::confirm() const
{
    createOutPacket(CMSG_TRADE_ADD_COMPLETE);
}

void TradeHandler::finish() const
{
    createOutPacket(CMSG_TRADE_OK);
}

void TradeHandler::cancel() const
{
    createOutPacket(CMSG_TRADE_CANCEL_REQUEST);
}

void TradeHandler::processTradeRequest(Net::MessageIn &msg)
{
    const std::string &partner = msg.readString(24, "name");
    msg.readInt32("char id");
    msg.readInt16("base level");
    processTradeRequestContinue(partner);
}

void TradeHandler::processTradeResponse(Net::MessageIn &msg)
{
    const uint8_t type = msg.readUInt8("type");
    msg.readInt32("char id");
    msg.readInt16("base level");
    processTradeResponseContinue(type);
}

void TradeHandler::processTradeItemAdd(Net::MessageIn &msg)
{
    const int type = msg.readInt16("type");
    const int itemType = msg.readUInt8("item type");
    const int amount = msg.readInt32("amount");
    const uint8_t identify = msg.readUInt8("identify");
    msg.readUInt8("attribute");
    const uint8_t refine = msg.readUInt8("refine");
    int cards[4];
    for (int f = 0; f < 4; f++)
        cards[f] = msg.readInt16("card");

    if (tradeWindow)
    {
        if (type == 0)
        {
            tradeWindow->setMoney(amount);
        }
        else
        {
            tradeWindow->addItem2(type, itemType,
                cards, 4,
                false, amount,
                refine, 1, identify != 0,
                false, false, false);
        }
    }
}

void TradeHandler::processTradeItemAddResponse(Net::MessageIn &msg)
{
    msg.readInt16("index");
    const uint8_t res = msg.readUInt8("fail");
    switch (res)
    {
        case 0:  // Successfully added item
        case 9:  // silent added item
        {
            Item *const item = PlayerInfo::getInventory()->getItem(
                mItemIndex);
            if (!item)
                return;
            if (tradeWindow)
            {
                tradeWindow->addItem2(item->getId(), item->getType(),
                    item->getCards(), 4,
                    true, mQuantity, item->getRefine(), item->getColor(),
                    item->getIdentified(), item->getDamaged(),
                    item->getFavorite(), item->isEquipment());
            }
            item->increaseQuantity(-mQuantity);
            mItemIndex = -1;
            mQuantity = 0;
            break;
        }
        case 1:
            // Add item failed - player overweighted
            NotifyManager::notify(NotifyTypes::
                TRADE_ADD_PARTNER_OVER_WEIGHT);
            break;
        case 2:
            NotifyManager::notify(NotifyTypes::TRADE_ADD_ERROR);
            break;
        default:
            NotifyManager::notify(NotifyTypes::TRADE_ADD_ERROR);
            logger->log("QQQ SMSG_TRADE_ITEM_ADD_RESPONSE: "
                        + toString(res));
            break;
    }
}

void TradeHandler::processTradeUndo(Net::MessageIn &msg A_UNUSED)
{
    // +++ here need clear trade window from partner side?
}

}  // namespace EAthena