/*
 * Copyright (C) 2011 TrinityCore <http://www.trinitycore.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/>.
 */

#include "WorldSession.h"
#include "Player.h"
#include "ObjectMgr.h"
#include "Opcodes.h"
#include "Log.h"

void WorldSession::HandleGrantLevel(WorldPacket& recv_data)
{
    sLog->outDebug(LOG_FILTER_NETWORKIO, "WORLD: CMSG_GRANT_LEVEL");

    uint64 guid;
    recv_data.readPackGUID(guid);

    Player* target = ObjectAccessor::GetObjectInWorld(guid, _player);

    // check cheating
    uint8 levels = _player->GetGrantableLevels();
    uint8 error = 0;
    if (!target)
        error = ERR_REFER_A_FRIEND_NO_TARGET;
    else if (levels == 0)
        error = ERR_REFER_A_FRIEND_INSUFFICIENT_GRANTABLE_LEVELS;
    else if (GetRecruiterId() != target->GetSession()->GetAccountId())
        error = ERR_REFER_A_FRIEND_NOT_REFERRED_BY;
    else if (target->GetTeamId() != _player->GetTeamId())
        error = ERR_REFER_A_FRIEND_DIFFERENT_FACTION;
    else if (target->getLevel() >= _player->getLevel())
        error = ERR_REFER_A_FRIEND_TARGET_TOO_HIGH;
    else if (target->getLevel() >= sWorld->getIntConfig(CONFIG_MAX_RECRUIT_A_FRIEND_BONUS_PLAYER_LEVEL))
        error = ERR_REFER_A_FRIEND_GRANT_LEVEL_MAX_I;
    else if (target->GetGroup() != _player->GetGroup())
        error = ERR_REFER_A_FRIEND_NOT_IN_GROUP;

    if (error) {
        WorldPacket data(SMSG_REFER_A_FRIEND_FAILURE, 24);
        data << uint32(error);
        if (error == ERR_REFER_A_FRIEND_NOT_IN_GROUP)
            data << target->GetName();

        SendPacket(&data);
        return;
    }

    WorldPacket data2(SMSG_PROPOSE_LEVEL_GRANT, 8);
    data2.append(_player->GetPackGUID());
    target->GetSession()->SendPacket(&data2);
}

void WorldSession::HandleAcceptGrantLevel(WorldPacket& recv_data)
{
    sLog->outDebug(LOG_FILTER_NETWORKIO, "WORLD: CMSG_ACCEPT_LEVEL_GRANT");

    uint64 guid;
    recv_data.readPackGUID(guid);

    Player* other = ObjectAccessor::GetObjectInWorld(guid, _player);
    if (!(other && other->GetSession()))
        return;

    if (GetAccountId() != other->GetSession()->GetRecruiterId())
        return;

    if (other->GetGrantableLevels())
        other->SetGrantableLevels(other->GetGrantableLevels() - 1);
    else
        return;

    _player->GiveLevel(_player->getLevel() + 1);
}