/*
 * Copyright (C) 2008-2018 TrinityCore <https://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/>.
 */

#ifndef CreatureTextMgrImpl_h__
#define CreatureTextMgrImpl_h__

#include "CreatureTextMgr.h"
#include "CellImpl.h"
#include "Group.h"
#include "GridNotifiers.h"
#include "World.h"
#include "WorldSession.h"

template<class Builder>
class CreatureTextLocalizer
{
public:
    CreatureTextLocalizer(Builder const& builder, ChatMsg msgType) : _builder(builder), _msgType(msgType)
    {
        _packetCache.resize(TOTAL_LOCALES, nullptr);
    }

    ~CreatureTextLocalizer()
    {
        for (size_t i = 0; i < _packetCache.size(); ++i)
        {
            if (_packetCache[i])
                delete _packetCache[i]->first;
            delete _packetCache[i];
        }
    }

    void operator()(Player const* player) const
    {
        LocaleConstant loc_idx = player->GetSession()->GetSessionDbLocaleIndex();
        WorldPacket* messageTemplate;
        size_t whisperGUIDpos;

        // create if not cached yet
        if (!_packetCache[loc_idx])
        {
            messageTemplate = new WorldPacket();
            whisperGUIDpos = _builder(messageTemplate, loc_idx);
            _packetCache[loc_idx] = new std::pair<WorldPacket*, size_t>(messageTemplate, whisperGUIDpos);
        }
        else
        {
            messageTemplate = _packetCache[loc_idx]->first;
            whisperGUIDpos = _packetCache[loc_idx]->second;
        }

        WorldPacket data(*messageTemplate);
        switch (_msgType)
        {
            case CHAT_MSG_MONSTER_WHISPER:
            case CHAT_MSG_RAID_BOSS_WHISPER:
                data.put<uint64>(whisperGUIDpos, player->GetGUID().GetRawValue());
                break;
            default:
                break;
        }

        player->SendDirectMessage(&data);
    }

private:
    mutable std::vector<std::pair<WorldPacket*, size_t>*> _packetCache;
    Builder const& _builder;
    ChatMsg _msgType;
};

template<class Builder>
void CreatureTextMgr::SendChatPacket(WorldObject* source, Builder const& builder, ChatMsg msgType, WorldObject const* whisperTarget /*= nullptr*/, CreatureTextRange range /*= TEXT_RANGE_NORMAL*/, Team team /*= TEAM_OTHER*/, bool gmOnly /*= false*/) const
{
    if (!source)
        return;

    CreatureTextLocalizer<Builder> localizer(builder, msgType);

    switch (msgType)
    {
        case CHAT_MSG_MONSTER_PARTY:
        {
            if (!whisperTarget)
                return;

            if (Player const* whisperPlayer = whisperTarget->ToPlayer())
                if (Group const* group = whisperPlayer->GetGroup())
                    group->BroadcastWorker(localizer);
            return;
        }
        case CHAT_MSG_MONSTER_WHISPER:
        case CHAT_MSG_RAID_BOSS_WHISPER:
        {
            if (range == TEXT_RANGE_NORMAL) // ignores team and gmOnly
            {
                if (!whisperTarget || whisperTarget->GetTypeId() != TYPEID_PLAYER)
                    return;

                localizer(const_cast<Player*>(whisperTarget->ToPlayer()));
                return;
            }
            break;
        }
        default:
            break;
    }

    switch (range)
    {
        case TEXT_RANGE_AREA:
        {
            uint32 areaId = source->GetAreaId();
            Map::PlayerList const& players = source->GetMap()->GetPlayers();
            for (Map::PlayerList::const_iterator itr = players.begin(); itr != players.end(); ++itr)
                if (itr->GetSource()->GetAreaId() == areaId && (!team || Team(itr->GetSource()->GetTeam()) == team) && (!gmOnly || itr->GetSource()->IsGameMaster()))
                    localizer(itr->GetSource());
            return;
        }
        case TEXT_RANGE_ZONE:
        {
            uint32 zoneId = source->GetZoneId();
            Map::PlayerList const& players = source->GetMap()->GetPlayers();
            for (Map::PlayerList::const_iterator itr = players.begin(); itr != players.end(); ++itr)
                if (itr->GetSource()->GetZoneId() == zoneId && (!team || Team(itr->GetSource()->GetTeam()) == team) && (!gmOnly || itr->GetSource()->IsGameMaster()))
                    localizer(itr->GetSource());
            return;
        }
        case TEXT_RANGE_MAP:
        {
            Map::PlayerList const& players = source->GetMap()->GetPlayers();
            for (Map::PlayerList::const_iterator itr = players.begin(); itr != players.end(); ++itr)
                if ((!team || Team(itr->GetSource()->GetTeam()) == team) && (!gmOnly || itr->GetSource()->IsGameMaster()))
                    localizer(itr->GetSource());
            return;
        }
        case TEXT_RANGE_WORLD:
        {
            SessionMap const& smap = sWorld->GetAllSessions();
            for (SessionMap::const_iterator iter = smap.begin(); iter != smap.end(); ++iter)
                if (Player* player = iter->second->GetPlayer())
                    if ((!team || Team(player->GetTeam()) == team) && (!gmOnly || player->IsGameMaster()))
                        localizer(player);
            return;
        }
        case TEXT_RANGE_NORMAL:
        default:
            break;
    }

    float dist = GetRangeForChatType(msgType);
    Trinity::PlayerDistWorker<CreatureTextLocalizer<Builder>> worker(source, dist, localizer);
    Cell::VisitWorldObjects(source, worker, dist);
}

#endif // CreatureTextMgrImpl_h__