// BeamMP, the BeamNG.drive multiplayer mod.
// Copyright (C) 2024 BeamMP Ltd., BeamMP team and contributors.
//
// BeamMP Ltd. can be contacted by electronic mail via contact@beammp.com.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

#pragma once

#include "IThreaded.h"
#include "RWMutex.h"
#include "TScopedTimer.h"
#include <functional>
#include <memory>
#include <mutex>
#include <unordered_set>

#include "BoostAliases.h"

class TClient;
class TNetwork;
class TPPSMonitor;

class TServer final {
public:
    using TClientSet = std::unordered_set<std::shared_ptr<TClient>>;

    TServer(const std::vector<std::string_view>& Arguments);

    void InsertClient(const std::shared_ptr<TClient>& Ptr);
    void RemoveClient(const std::weak_ptr<TClient>&);
    // in Fn, return true to continue, return false to break
    void ForEachClient(const std::function<bool(std::weak_ptr<TClient>)>& Fn);
    size_t ClientCount() const;

    void GlobalParser(const std::weak_ptr<TClient>& Client, std::vector<uint8_t>&& Packet, TPPSMonitor& PPSMonitor, TNetwork& Network);
    static void HandleEvent(TClient& c, const std::string& Data);
    RWMutex& GetClientMutex() const { return mClientsMutex; }

    const TScopedTimer UptimeTimer;

    // asio io context
    io_context& IoCtx() { return mIoCtx; }

private:
    io_context mIoCtx {};
    TClientSet mClients;
    mutable RWMutex mClientsMutex;
    static void ParseVehicle(TClient& c, const std::string& Pckt, TNetwork& Network);
    static bool ShouldSpawn(TClient& c, const std::string& CarJson, int ID);
    static bool IsUnicycle(TClient& c, const std::string& CarJson);
    static void Apply(TClient& c, int VID, const std::string& pckt);
    void HandlePosition(TClient& c, const std::string& Packet);
};

struct BufferView {
    uint8_t* Data { nullptr };
    size_t Size { 0 };
    const uint8_t* data() const { return Data; }
    uint8_t* data() { return Data; }
    size_t size() const { return Size; }
};