/*
 * Copyright (c) 2023 Fancy Code.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#ifndef TCP_SERVER_IMPL_H
#define TCP_SERVER_IMPL_H
#include "ITcpServer.h"
#include "TcpModule.h"
#include "hloop.h"
#include "hsocket.h"
#include "hssl.h"
#include <map>
#include <mutex>
#include <thread>
/**
 * @brief The TcpClient Accept class instance is used to associate with the socket after connecting to the server and client, responsible for a series of operations (read/write, etc.) after the connection
 *
 */
class TcpClientAcceptImpl : public ITcpClientAccept, public std::enable_shared_from_this<TcpClientAcceptImpl>
{
public:
    TcpClientAcceptImpl(const hio_t *io, const void *object, const ClientAcceptParam &param);
    virtual ~TcpClientAcceptImpl() = default;
    void Close(void) override;   ///<Disconnect the client
    void Readed(const void *data, size_t length) override; ///<The server reads the data received by tcp connection.
    ssize_t Write(const void *data, size_t length) override;///<The server writes data to the tcp connection.
    void Closed(void) override; ///<Used to perform some cleaning work or notify upper layer logic when a TCP client accepts a connection that is closed

private:
    const hio_t *mIo; ///< Connected client socket
    const void *mObjectThis;///<Used to verify whether this type of instance is legal
    const ClientAcceptParam mParam;
};
/**
 * @brief The TcpServerImpl class is responsible for listening to connection requests from clients and creating an
 * instance of TcpClientAcceptImpl for each accepted connection.
 *
 */
class TcpServerImpl : public ITcpServer, public std::enable_shared_from_this<TcpServerImpl>
{
public:
    TcpServerImpl(const TcpServerParam param);
    virtual ~TcpServerImpl() = default;
    void Init(void) override;
    void UnInit(void) override; 
    void Loop(void);              ///< Run an event loop and release resources after completion or error.
    void AddClient(hio_t *io);    ///< Add a newly connected client to the server connection management list.
    std::shared_ptr<ITcpClientAccept> *GetClient(hio_t *io);///< Retrieve the corresponding client acceptance object based on the socket handle.
    void RemoveClient(hio_t *io); ///< Remove the data element in the map, that is, the connected client.
    void FreeClients(void);       ///< Clear all connected clients.
    void Closed(void);            ///< Stop listening to the event loop(mLoop)

private:
    std::mutex mMutex; ///< A mutex lock used to synchronize access to shared resources.
    hloop_t *mLoop;    ///< Event loop, listening for all io objects
    hio_t *mIo;        ///< A server socket to listen whether a new client sends a connection request.
    const TcpServerParam mParam;
    std::thread mTcpServerThread;   ///< A separate thread used to run event loops
    std::map<int, std::shared_ptr<ITcpClientAccept> *> mClients;///< Container for storing clients connected to servers
};
std::shared_ptr<ITcpServer> *NewTcpServer(const TcpServerParam &param);
std::shared_ptr<ITcpClientAccept> *NewTcpClientAccept(const hio_t *io, const ClientAcceptParam &param);
#endif