/*
 * Copyright (C) 2008-2017 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 "AccountMgr.h"
#include "BattlenetAccountMgr.h"
#include "DatabaseEnv.h"
#include "DB2Stores.h"
#include "GossipDef.h"
#include "Guild.h"
#include "GuildMgr.h"
#include "Item.h"
#include "Language.h"
#include "Log.h"
#include "Mail.h"
#include "MailPackets.h"
#include "ObjectAccessor.h"
#include "ObjectMgr.h"
#include "Opcodes.h"
#include "Player.h"
#include "World.h"
#include "WorldPacket.h"

bool WorldSession::CanOpenMailBox(ObjectGuid guid)
{
    if (guid == _player->GetGUID())
    {
        if (!HasPermission(rbac::RBAC_PERM_COMMAND_MAILBOX))
        {
            TC_LOG_WARN("cheat", "%s attempted to open mailbox by using a cheat.", _player->GetName().c_str());
            return false;
        }
    }
    else if (guid.IsGameObject())
    {
        if (!_player->GetGameObjectIfCanInteractWith(guid, GAMEOBJECT_TYPE_MAILBOX))
            return false;
    }
    else if (guid.IsAnyTypeCreature())
    {
        if (!_player->GetNPCIfCanInteractWith(guid, UNIT_NPC_FLAG_MAILBOX))
            return false;
    }
    else
        return false;

    return true;
}

void WorldSession::HandleSendMail(WorldPackets::Mail::SendMail& packet)
{
    if (packet.Info.Attachments.size() > MAX_MAIL_ITEMS)        // client limit
    {
        GetPlayer()->SendMailResult(0, MAIL_SEND, MAIL_ERR_TOO_MANY_ATTACHMENTS);
        return;
    }

    if (!CanOpenMailBox(packet.Info.Mailbox))
        return;

    if (packet.Info.Target.empty())
        return;

    Player* player = _player;

    if (player->getLevel() < sWorld->getIntConfig(CONFIG_MAIL_LEVEL_REQ))
    {
        SendNotification(GetTrinityString(LANG_MAIL_SENDER_REQ), sWorld->getIntConfig(CONFIG_MAIL_LEVEL_REQ));
        return;
    }

    ObjectGuid receiverGuid;
    if (normalizePlayerName(packet.Info.Target))
        receiverGuid = ObjectMgr::GetPlayerGUIDByName(packet.Info.Target);

    if (!receiverGuid)
    {
        TC_LOG_INFO("network", "Player %s is sending mail to %s (GUID: not existing!) with subject %s "
            "and body %s includes " SZFMTD " items, " SI64FMTD " copper and " SI64FMTD " COD copper with StationeryID = %d",
            GetPlayerInfo().c_str(), packet.Info.Target.c_str(), packet.Info.Subject.c_str(), packet.Info.Body.c_str(),
            packet.Info.Attachments.size(), packet.Info.SendMoney, packet.Info.Cod, packet.Info.StationeryID);
        player->SendMailResult(0, MAIL_SEND, MAIL_ERR_RECIPIENT_NOT_FOUND);
        return;
    }

    if (packet.Info.SendMoney < 0)
    {
        GetPlayer()->SendMailResult(0, MAIL_SEND, MAIL_ERR_INTERNAL_ERROR);
        TC_LOG_WARN("cheat", "Player %s attempted to send mail to %s (%s) with negative money value (SendMoney: " SI64FMTD ")",
            GetPlayerInfo().c_str(), packet.Info.Target.c_str(), receiverGuid.ToString().c_str(), packet.Info.SendMoney);
        return;
    }

    if (packet.Info.Cod < 0)
    {
        GetPlayer()->SendMailResult(0, MAIL_SEND, MAIL_ERR_INTERNAL_ERROR);
        TC_LOG_WARN("cheat", "Player %s attempted to send mail to %s (%s) with negative COD value (Cod: " SI64FMTD ")",
            GetPlayerInfo().c_str(), packet.Info.Target.c_str(), receiverGuid.ToString().c_str(), packet.Info.Cod);
        return;
    }

    TC_LOG_INFO("network", "Player %s is sending mail to %s (%s) with subject %s and body %s "
        "includes " SZFMTD " items, " SI64FMTD " copper and " SI64FMTD  " COD copper with StationeryID = %d",
        GetPlayerInfo().c_str(), packet.Info.Target.c_str(), receiverGuid.ToString().c_str(), packet.Info.Subject.c_str(),
        packet.Info.Body.c_str(), packet.Info.Attachments.size(), packet.Info.SendMoney, packet.Info.Cod, packet.Info.StationeryID);

    if (player->GetGUID() == receiverGuid)
    {
        player->SendMailResult(0, MAIL_SEND, MAIL_ERR_CANNOT_SEND_TO_SELF);
        return;
    }

    uint32 cost = !packet.Info.Attachments.empty() ? 30 * packet.Info.Attachments.size() : 30;  // price hardcoded in client

    int64 reqmoney = cost + packet.Info.SendMoney;

    // Check for overflow
    if (reqmoney < packet.Info.SendMoney)
    {
        player->SendMailResult(0, MAIL_SEND, MAIL_ERR_NOT_ENOUGH_MONEY);
        return;
    }

    if (!player->HasEnoughMoney(reqmoney) && !player->IsGameMaster())
    {
        player->SendMailResult(0, MAIL_SEND, MAIL_ERR_NOT_ENOUGH_MONEY);
        return;
    }

    Player* receiver = ObjectAccessor::FindConnectedPlayer(receiverGuid);

    uint32 receiverTeam = 0;
    uint8 mailsCount = 0;                                  //do not allow to send to one player more than 100 mails
    uint8 receiverLevel = 0;
    uint32 receiverAccountId = 0;
    uint32 receiverBnetAccountId = 0;

    if (receiver)
    {
        receiverTeam = receiver->GetTeam();
        mailsCount = receiver->GetMailSize();
        receiverLevel = receiver->getLevel();
        receiverAccountId = receiver->GetSession()->GetAccountId();
        receiverBnetAccountId = receiver->GetSession()->GetBattlenetAccountId();
    }
    else
    {
        receiverTeam = ObjectMgr::GetPlayerTeamByGUID(receiverGuid);

        PreparedStatement* stmt = CharacterDatabase.GetPreparedStatement(CHAR_SEL_MAIL_COUNT);
        stmt->setUInt64(0, receiverGuid.GetCounter());

        PreparedQueryResult result = CharacterDatabase.Query(stmt);
        if (result)
        {
            Field* fields = result->Fetch();
            mailsCount = fields[0].GetUInt64();
        }

        stmt = CharacterDatabase.GetPreparedStatement(CHAR_SEL_CHAR_LEVEL);
        stmt->setUInt64(0, receiverGuid.GetCounter());

        result = CharacterDatabase.Query(stmt);
        if (result)
        {
            Field* fields = result->Fetch();
            receiverLevel = fields[0].GetUInt8();
        }

        receiverAccountId = ObjectMgr::GetPlayerAccountIdByGUID(receiverGuid);
        receiverBnetAccountId = Battlenet::AccountMgr::GetIdByGameAccount(receiverAccountId);
    }

    // do not allow to have more than 100 mails in mailbox.. mails count is in opcode uint8!!! - so max can be 255..
    if (mailsCount > 100)
    {
        player->SendMailResult(0, MAIL_SEND, MAIL_ERR_RECIPIENT_CAP_REACHED);
        return;
    }

    // test the receiver's Faction... or all items are account bound
    bool accountBound = !packet.Info.Attachments.empty();
    for (auto const& att : packet.Info.Attachments)
    {
        if (Item* item = player->GetItemByGuid(att.ItemGUID))
        {
            ItemTemplate const* itemProto = item->GetTemplate();
            if (!itemProto || !(itemProto->GetFlags() & ITEM_FLAG_IS_BOUND_TO_ACCOUNT))
            {
                accountBound = false;
                break;
            }
        }
    }

    if (!accountBound && player->GetTeam() != receiverTeam && !HasPermission(rbac::RBAC_PERM_TWO_SIDE_INTERACTION_MAIL))
    {
        player->SendMailResult(0, MAIL_SEND, MAIL_ERR_NOT_YOUR_TEAM);
        return;
    }

    if (receiverLevel < sWorld->getIntConfig(CONFIG_MAIL_LEVEL_REQ))
    {
        SendNotification(GetTrinityString(LANG_MAIL_RECEIVER_REQ), sWorld->getIntConfig(CONFIG_MAIL_LEVEL_REQ));
        return;
    }

    std::vector<Item*> items;

    for (auto const& att : packet.Info.Attachments)
    {
        if (att.ItemGUID.IsEmpty())
        {
            player->SendMailResult(0, MAIL_SEND, MAIL_ERR_MAIL_ATTACHMENT_INVALID);
            return;
        }

        Item* item = player->GetItemByGuid(att.ItemGUID);

        // prevent sending bag with items (cheat: can be placed in bag after adding equipped empty bag to mail)
        if (!item)
        {
            player->SendMailResult(0, MAIL_SEND, MAIL_ERR_MAIL_ATTACHMENT_INVALID);
            return;
        }

        if (!item->CanBeTraded(true))
        {
            player->SendMailResult(0, MAIL_SEND, MAIL_ERR_EQUIP_ERROR, EQUIP_ERR_MAIL_BOUND_ITEM);
            return;
        }

        if (item->IsBoundAccountWide() && item->IsSoulBound() && player->GetSession()->GetAccountId() != receiverAccountId)
        {
            if (!item->IsBattlenetAccountBound() || !player->GetSession()->GetBattlenetAccountId() || player->GetSession()->GetBattlenetAccountId() != receiverBnetAccountId)
            {
                player->SendMailResult(0, MAIL_SEND, MAIL_ERR_EQUIP_ERROR, EQUIP_ERR_NOT_SAME_ACCOUNT);
                return;
            }
        }

        if (item->GetTemplate()->GetFlags() & ITEM_FLAG_CONJURED || item->GetUInt32Value(ITEM_FIELD_DURATION))
        {
            player->SendMailResult(0, MAIL_SEND, MAIL_ERR_EQUIP_ERROR, EQUIP_ERR_MAIL_BOUND_ITEM);
            return;
        }

        if (packet.Info.Cod && item->HasFlag(ITEM_FIELD_FLAGS, ITEM_FIELD_FLAG_WRAPPED))
        {
            player->SendMailResult(0, MAIL_SEND, MAIL_ERR_CANT_SEND_WRAPPED_COD);
            return;
        }

        if (item->IsNotEmptyBag())
        {
            player->SendMailResult(0, MAIL_SEND, MAIL_ERR_EQUIP_ERROR, EQUIP_ERR_DESTROY_NONEMPTY_BAG);
            return;
        }

        items.push_back(item);
    }

    player->SendMailResult(0, MAIL_SEND, MAIL_OK);

    player->ModifyMoney(-reqmoney);
    player->UpdateCriteria(CRITERIA_TYPE_GOLD_SPENT_FOR_MAIL, cost);

    bool needItemDelay = false;

    MailDraft draft(packet.Info.Subject, packet.Info.Body);

    SQLTransaction trans = CharacterDatabase.BeginTransaction();

    if (!packet.Info.Attachments.empty() || packet.Info.SendMoney > 0)
    {
        bool log = HasPermission(rbac::RBAC_PERM_LOG_GM_TRADE);
        if (!packet.Info.Attachments.empty())
        {
            for (auto const& item : items)
            {
                if (log)
                {
                    sLog->outCommand(GetAccountId(), "GM %s (%s) (Account: %u) mail item: %s (Entry: %u Count: %u) "
                        "to: %s (%s) (Account: %u)", GetPlayerName().c_str(), _player->GetGUID().ToString().c_str(), GetAccountId(),
                        item->GetTemplate()->GetDefaultLocaleName(), item->GetEntry(), item->GetCount(),
                        packet.Info.Target.c_str(), receiverGuid.ToString().c_str(), receiverAccountId);
                }

                item->SetNotRefundable(GetPlayer()); // makes the item no longer refundable
                player->MoveItemFromInventory(item->GetBagSlot(), item->GetSlot(), true);

                item->DeleteFromInventoryDB(trans);     // deletes item from character's inventory
                item->SetOwnerGUID(receiverGuid);
                item->SetState(ITEM_CHANGED);
                item->SaveToDB(trans);                  // recursive and not have transaction guard into self, item not in inventory and can be save standalone

                draft.AddItem(item);
            }

            // if item send to character at another account, then apply item delivery delay
            needItemDelay = player->GetSession()->GetAccountId() != receiverAccountId;
        }

        if (log && packet.Info.SendMoney > 0)
        {
            sLog->outCommand(GetAccountId(), "GM %s (%s) (Account: %u) mail money: " SI64FMTD " to: %s (%s) (Account: %u)",
                GetPlayerName().c_str(), _player->GetGUID().ToString().c_str(), GetAccountId(), packet.Info.SendMoney, packet.Info.Target.c_str(), receiverGuid.ToString().c_str(), receiverAccountId);
        }
    }

    // If theres is an item, there is a one hour delivery delay if sent to another account's character.
    uint32 deliver_delay = needItemDelay ? sWorld->getIntConfig(CONFIG_MAIL_DELIVERY_DELAY) : 0;

    // Mail sent between guild members arrives instantly
    if (Guild* guild = sGuildMgr->GetGuildById(player->GetGuildId()))
        if (guild->IsMember(receiverGuid))
            deliver_delay = 0;

    // don't ask for COD if there are no items
    if (packet.Info.Attachments.empty())
        packet.Info.Cod = 0;

    // will delete item or place to receiver mail list
    draft
        .AddMoney(packet.Info.SendMoney)
        .AddCOD(packet.Info.Cod)
        .SendMailTo(trans, MailReceiver(receiver, receiverGuid.GetCounter()), MailSender(player), packet.Info.Body.empty() ? MAIL_CHECK_MASK_COPIED : MAIL_CHECK_MASK_HAS_BODY, deliver_delay);

    player->SaveInventoryAndGoldToDB(trans);
    CharacterDatabase.CommitTransaction(trans);
}

//called when mail is read
void WorldSession::HandleMailMarkAsRead(WorldPackets::Mail::MailMarkAsRead& packet)
{
    if (!CanOpenMailBox(packet.Mailbox))
        return;

    Player* player = _player;
    Mail* m = player->GetMail(packet.MailID);
    if (m && m->state != MAIL_STATE_DELETED)
    {
        if (player->unReadMails)
            --player->unReadMails;
        m->checked = m->checked | MAIL_CHECK_MASK_READ;
        player->m_mailsUpdated = true;
        m->state = MAIL_STATE_CHANGED;
    }
}

//called when client deletes mail
void WorldSession::HandleMailDelete(WorldPackets::Mail::MailDelete& packet)
{
    Mail* m = _player->GetMail(packet.MailID);
    Player* player = _player;
    player->m_mailsUpdated = true;
    if (m)
    {
        // delete shouldn't show up for COD mails
        if (m->COD)
        {
            player->SendMailResult(packet.MailID, MAIL_DELETED, MAIL_ERR_INTERNAL_ERROR);
            return;
        }

        m->state = MAIL_STATE_DELETED;
    }
    player->SendMailResult(packet.MailID, MAIL_DELETED, MAIL_OK);
}

void WorldSession::HandleMailReturnToSender(WorldPackets::Mail::MailReturnToSender& packet)
{
    if (!CanOpenMailBox(_player->PlayerTalkClass->GetInteractionData().SourceGuid))
        return;

    Player* player = _player;
    Mail* m = player->GetMail(packet.MailID);
    if (!m || m->state == MAIL_STATE_DELETED || m->deliver_time > time(nullptr) || m->sender != packet.SenderGUID.GetCounter())
    {
        player->SendMailResult(packet.MailID, MAIL_RETURNED_TO_SENDER, MAIL_ERR_INTERNAL_ERROR);
        return;
    }
    //we can return mail now, so firstly delete the old one
    SQLTransaction trans = CharacterDatabase.BeginTransaction();

    PreparedStatement* stmt = CharacterDatabase.GetPreparedStatement(CHAR_DEL_MAIL_BY_ID);
    stmt->setUInt32(0, packet.MailID);
    trans->Append(stmt);

    stmt = CharacterDatabase.GetPreparedStatement(CHAR_DEL_MAIL_ITEM_BY_ID);
    stmt->setUInt32(0, packet.MailID);
    trans->Append(stmt);

    player->RemoveMail(packet.MailID);

    // only return mail if the player exists (and delete if not existing)
    if (m->messageType == MAIL_NORMAL && m->sender)
    {
        MailDraft draft(m->subject, m->body);
        if (m->mailTemplateId)
            draft = MailDraft(m->mailTemplateId, false);     // items already included

        if (m->HasItems())
        {
            for (MailItemInfoVec::iterator itr2 = m->items.begin(); itr2 != m->items.end(); ++itr2)
            {
                if (Item* const item = player->GetMItem(itr2->item_guid))
                    draft.AddItem(item);
                player->RemoveMItem(itr2->item_guid);
            }
        }
        draft.AddMoney(m->money).SendReturnToSender(GetAccountId(), m->receiver, m->sender, trans);
    }

    CharacterDatabase.CommitTransaction(trans);

    delete m;                                               //we can deallocate old mail
    player->SendMailResult(packet.MailID, MAIL_RETURNED_TO_SENDER, MAIL_OK);
}

//called when player takes item attached in mail
void WorldSession::HandleMailTakeItem(WorldPackets::Mail::MailTakeItem& packet)
{
    uint32 AttachID = packet.AttachID;

    if (!CanOpenMailBox(packet.Mailbox))
        return;

    Player* player = _player;

    Mail* m = player->GetMail(packet.MailID);
    if (!m || m->state == MAIL_STATE_DELETED || m->deliver_time > time(nullptr))
    {
        player->SendMailResult(packet.MailID, MAIL_ITEM_TAKEN, MAIL_ERR_INTERNAL_ERROR);
        return;
    }

    // verify that the mail has the item to avoid cheaters taking COD items without paying
    if (std::find_if(m->items.begin(), m->items.end(), [AttachID](MailItemInfo info){ return info.item_guid == AttachID; }) == m->items.end())
    {
        player->SendMailResult(packet.MailID, MAIL_ITEM_TAKEN, MAIL_ERR_INTERNAL_ERROR);
        return;
    }

    // prevent cheating with skip client money check
    if (!player->HasEnoughMoney(m->COD))
    {
        player->SendMailResult(packet.MailID, MAIL_ITEM_TAKEN, MAIL_ERR_NOT_ENOUGH_MONEY);
        return;
    }

    Item* it = player->GetMItem(packet.AttachID);

    ItemPosCountVec dest;
    uint8 msg = _player->CanStoreItem(NULL_BAG, NULL_SLOT, dest, it, false);
    if (msg == EQUIP_ERR_OK)
    {
        SQLTransaction trans = CharacterDatabase.BeginTransaction();
        m->RemoveItem(packet.AttachID);
        m->removedItems.push_back(packet.AttachID);

        if (m->COD > 0)                                     //if there is COD, take COD money from player and send them to sender by mail
        {
            ObjectGuid sender_guid = ObjectGuid::Create<HighGuid::Player>(m->sender);
            Player* receiver = ObjectAccessor::FindConnectedPlayer(sender_guid);

            uint32 sender_accId = 0;

            if (HasPermission(rbac::RBAC_PERM_LOG_GM_TRADE))
            {
                std::string sender_name;
                if (receiver)
                {
                    sender_accId = receiver->GetSession()->GetAccountId();
                    sender_name = receiver->GetName();
                }
                else
                {
                    // can be calculated early
                    sender_accId = ObjectMgr::GetPlayerAccountIdByGUID(sender_guid);

                    if (!ObjectMgr::GetPlayerNameByGUID(sender_guid, sender_name))
                        sender_name = sObjectMgr->GetTrinityStringForDBCLocale(LANG_UNKNOWN);
                }
                sLog->outCommand(GetAccountId(), "GM %s (Account: %u) receiver mail item: %s (Entry: %u Count: %u) and send COD money: " UI64FMTD " to player: %s (Account: %u)",
                    GetPlayerName().c_str(), GetAccountId(), it->GetTemplate()->GetDefaultLocaleName(), it->GetEntry(), it->GetCount(), m->COD, sender_name.c_str(), sender_accId);
            }
            else if (!receiver)
                sender_accId = ObjectMgr::GetPlayerAccountIdByGUID(sender_guid);

            // check player existence
            if (receiver || sender_accId)
            {
                MailDraft(m->subject, "")
                    .AddMoney(m->COD)
                    .SendMailTo(trans, MailReceiver(receiver, m->sender), MailSender(MAIL_NORMAL, m->receiver), MAIL_CHECK_MASK_COD_PAYMENT);
            }

            player->ModifyMoney(-int64(m->COD));
        }
        m->COD = 0;
        m->state = MAIL_STATE_CHANGED;
        player->m_mailsUpdated = true;
        player->RemoveMItem(it->GetGUID().GetCounter());

        uint32 count = it->GetCount();                      // save counts before store and possible merge with deleting
        it->SetState(ITEM_UNCHANGED);                       // need to set this state, otherwise item cannot be removed later, if neccessary
        player->MoveItemToInventory(dest, it, true);

        player->SaveInventoryAndGoldToDB(trans);
        player->_SaveMail(trans);
        CharacterDatabase.CommitTransaction(trans);

        player->SendMailResult(packet.MailID, MAIL_ITEM_TAKEN, MAIL_OK, 0, packet.AttachID, count);
    }
    else
        player->SendMailResult(packet.MailID, MAIL_ITEM_TAKEN, MAIL_ERR_EQUIP_ERROR, msg);
}

void WorldSession::HandleMailTakeMoney(WorldPackets::Mail::MailTakeMoney& packet)
{
    if (!CanOpenMailBox(packet.Mailbox))
        return;

    Player* player = _player;

    Mail* m = player->GetMail(packet.MailID);
    if ((!m || m->state == MAIL_STATE_DELETED || m->deliver_time > time(NULL)) ||
        (packet.Money > 0 && m->money != uint64(packet.Money)))
    {
        player->SendMailResult(packet.MailID, MAIL_MONEY_TAKEN, MAIL_ERR_INTERNAL_ERROR);
        return;
    }

    if (!player->ModifyMoney(m->money, false))
    {
        player->SendMailResult(packet.MailID, MAIL_MONEY_TAKEN, MAIL_ERR_EQUIP_ERROR, EQUIP_ERR_TOO_MUCH_GOLD);
        return;
    }

    m->money = 0;
    m->state = MAIL_STATE_CHANGED;
    player->m_mailsUpdated = true;

    player->SendMailResult(packet.MailID, MAIL_MONEY_TAKEN, MAIL_OK);

    // save money and mail to prevent cheating
    SQLTransaction trans = CharacterDatabase.BeginTransaction();
    player->SaveGoldToDB(trans);
    player->_SaveMail(trans);
    CharacterDatabase.CommitTransaction(trans);
}

//called when player lists his received mails
void WorldSession::HandleGetMailList(WorldPackets::Mail::MailGetList& packet)
{
    if (!CanOpenMailBox(packet.Mailbox))
        return;

    Player* player = _player;

    //load players mails, and mailed items
    if (!player->m_mailsLoaded)
        player->_LoadMail();

    WorldPackets::Mail::MailListResult response;
    time_t curTime = time(nullptr);

    for (Mail* m : player->GetMails())
    {
        // skip deleted or not delivered (deliver delay not expired) mails
        if (m->state == MAIL_STATE_DELETED || curTime < m->deliver_time)
            continue;

        // max. 50 mails can be sent
        if (response.Mails.size() < 50)
            response.Mails.emplace_back(m, player);

        ++response.TotalNumRecords;
    }

    player->PlayerTalkClass->GetInteractionData().Reset();
    player->PlayerTalkClass->GetInteractionData().SourceGuid = packet.Mailbox;
    SendPacket(response.Write());

    // recalculate m_nextMailDelivereTime and unReadMails
    _player->UpdateNextMailTimeAndUnreads();
}

//used when player copies mail body to his inventory
void WorldSession::HandleMailCreateTextItem(WorldPackets::Mail::MailCreateTextItem& packet)
{
    if (!CanOpenMailBox(packet.Mailbox))
        return;

    Player* player = _player;

    Mail* m = player->GetMail(packet.MailID);
    if (!m || (m->body.empty() && !m->mailTemplateId) || m->state == MAIL_STATE_DELETED || m->deliver_time > time(nullptr) || (m->checked & MAIL_CHECK_MASK_COPIED))
    {
        player->SendMailResult(packet.MailID, MAIL_MADE_PERMANENT, MAIL_ERR_INTERNAL_ERROR);
        return;
    }

    Item* bodyItem = new Item;                              // This is not bag and then can be used new Item.
    if (!bodyItem->Create(sObjectMgr->GetGenerator<HighGuid::Item>().Generate(), MAIL_BODY_ITEM_TEMPLATE, player))
    {
        delete bodyItem;
        return;
    }

    // in mail template case we need create new item text
    if (m->mailTemplateId)
    {
        MailTemplateEntry const* mailTemplateEntry = sMailTemplateStore.LookupEntry(m->mailTemplateId);
        if (!mailTemplateEntry)
        {
            player->SendMailResult(packet.MailID, MAIL_MADE_PERMANENT, MAIL_ERR_INTERNAL_ERROR);
            return;
        }

        bodyItem->SetText(mailTemplateEntry->Body->Str[GetSessionDbcLocale()]);
    }
    else
        bodyItem->SetText(m->body);

    if (m->messageType == MAIL_NORMAL)
        bodyItem->SetGuidValue(ITEM_FIELD_CREATOR, ObjectGuid::Create<HighGuid::Player>(m->sender));

    bodyItem->SetFlag(ITEM_FIELD_FLAGS, ITEM_FIELD_FLAG_READABLE);

    ItemPosCountVec dest;
    uint8 msg = _player->CanStoreItem(NULL_BAG, NULL_SLOT, dest, bodyItem, false);
    if (msg == EQUIP_ERR_OK)
    {
        m->checked = m->checked | MAIL_CHECK_MASK_COPIED;
        m->state = MAIL_STATE_CHANGED;
        player->m_mailsUpdated = true;

        player->StoreItem(dest, bodyItem, true);
        player->SendMailResult(packet.MailID, MAIL_MADE_PERMANENT, MAIL_OK);
    }
    else
    {
        player->SendMailResult(packet.MailID, MAIL_MADE_PERMANENT, MAIL_ERR_EQUIP_ERROR, msg);
        delete bodyItem;
    }
}

/// @todo Fix me! ... this void has probably bad condition, but good data are sent
void WorldSession::HandleQueryNextMailTime(WorldPackets::Mail::MailQueryNextMailTime& /*packet*/)
{
    WorldPackets::Mail::MailQueryNextTimeResult result;

    if (!_player->m_mailsLoaded)
        _player->_LoadMail();

    if (_player->unReadMails > 0)
    {
        result.NextMailTime = 0.0f;

        time_t now = time(nullptr);
        std::set<ObjectGuid::LowType> sentSenders;

        for (Mail* mail : _player->GetMails())
        {
            if (mail->checked & MAIL_CHECK_MASK_READ)
                continue;

            // already delivered
            if (now < mail->deliver_time)
                continue;

            // only send each mail sender once
            if (sentSenders.count(mail->sender))
                continue;

            result.Next.emplace_back(mail);

            sentSenders.insert(mail->sender);

            // do not send more than 2 mails
            if (sentSenders.size() > 2)
                break;
        }
    }
    else
        result.NextMailTime = -DAY;

    SendPacket(result.Write());
}