//
// Copyright (c) 2013-2025 The SRS Authors
//
// SPDX-License-Identifier: MIT
//

#ifndef SRS_APP_RTMP_CONN_HPP
#define SRS_APP_RTMP_CONN_HPP

#include <srs_core.hpp>

#include <string>

#include <srs_app_reload.hpp>
#include <srs_app_st.hpp>
#include <srs_core_autofree.hpp>
#include <srs_protocol_conn.hpp>
#include <srs_protocol_rtmp_conn.hpp>
#include <srs_protocol_rtmp_stack.hpp>

class SrsServer;
class SrsRtmpServer;
class ISrsRequest;
class SrsResponse;
class SrsLiveSource;
class SrsRefer;
class SrsLiveConsumer;
class SrsRtmpCommonMessage;
class SrsStSocket;
class SrsHttpHooks;
class SrsBandwidth;
class SrsKbps;
class SrsRtmpClient;
class SrsMediaPacket;
class SrsQueueRecvThread;
class SrsPublishRecvThread;
class SrsSecurity;
class ISrsWakable;
class SrsRtmpCommonMessage;
class SrsRtmpCommand;
class SrsNetworkDelta;
class ISrsNetworkDelta;
class ISrsAppConfig;
class SrsSslConnection;
class ISrsResourceManager;
class ISrsStreamPublishTokenManager;
class ISrsLiveSourceManager;
class ISrsStatistic;
class ISrsHttpHooks;
class ISrsRtcSourceManager;
class ISrsSrtSourceManager;
class ISrsRtspSourceManager;
class ISrsRtmpServer;
class ISrsRtmpTransport;
class ISrsSecurity;

// The simple rtmp client for SRS.
class SrsSimpleRtmpClient : public SrsBasicRtmpClient
{
// clang-format off
SRS_DECLARE_PRIVATE: // clang-format on
    ISrsAppConfig *config_;

public:
    SrsSimpleRtmpClient(std::string u, srs_utime_t ctm, srs_utime_t stm);
    virtual ~SrsSimpleRtmpClient();

// clang-format off
SRS_DECLARE_PROTECTED: // clang-format on
    virtual srs_error_t connect_app();
};

// Some information of client.
class SrsClientInfo
{
public:
    // The type of client, play or publish.
    SrsRtmpConnType type_;
    // Whether the client connected at the edge server.
    bool edge_;
    // Original request object from client.
    ISrsRequest *req_;
    // Response object to client.
    SrsResponse *res_;

public:
    SrsClientInfo();
    virtual ~SrsClientInfo();
};

// The transport layer for RTMP connections.
class ISrsRtmpTransport
{
public:
    ISrsRtmpTransport();
    virtual ~ISrsRtmpTransport();

public:
    virtual srs_netfd_t fd() = 0;
    virtual int osfd() = 0;
    virtual ISrsProtocolReadWriter *io() = 0;
    virtual srs_error_t handshake() = 0;
    virtual const char *transport_type() = 0;
    virtual srs_error_t set_socket_buffer(srs_utime_t buffer_v) = 0;
    virtual srs_error_t set_tcp_nodelay(bool v) = 0;
    virtual int64_t get_recv_bytes() = 0;
    virtual int64_t get_send_bytes() = 0;
};

// The base transport layer for RTMP connections over plain TCP.
class SrsRtmpTransport : public ISrsRtmpTransport
{
// clang-format off
SRS_DECLARE_PROTECTED: // clang-format on
    srs_netfd_t stfd_;
    SrsTcpConnection *skt_;

public:
    SrsRtmpTransport(srs_netfd_t c);
    virtual ~SrsRtmpTransport();

public:
    // Get the file descriptor for logging and identification
    virtual srs_netfd_t fd();
    virtual int osfd();
    // Get the appropriate I/O interface (TCP)
    virtual ISrsProtocolReadWriter *io();
    // Perform handshake (no-op for plain RTMP)
    virtual srs_error_t handshake();
    // Get transport type description for logging
    virtual const char *transport_type();
    // Set socket buffer size
    virtual srs_error_t set_socket_buffer(srs_utime_t buffer_v);
    // Set TCP nodelay option
    virtual srs_error_t set_tcp_nodelay(bool v);
    // Get network statistics
    virtual int64_t get_recv_bytes();
    virtual int64_t get_send_bytes();
};

// The SSL/TLS transport layer for RTMPS connections.
class SrsRtmpsTransport : public SrsRtmpTransport
{
// clang-format off
SRS_DECLARE_PRIVATE: // clang-format on
    ISrsAppConfig *config_;

// clang-format off
SRS_DECLARE_PRIVATE: // clang-format on
    SrsSslConnection *ssl_;

public:
    SrsRtmpsTransport(srs_netfd_t c);
    virtual ~SrsRtmpsTransport();

public:
    // Get the appropriate I/O interface (SSL)
    virtual ISrsProtocolReadWriter *io();
    // Perform SSL handshake
    virtual srs_error_t handshake();
    // Get transport type description for logging
    virtual const char *transport_type();
};

// The RTMP connection, for client to publish or play stream.
class SrsRtmpConn : public ISrsConnection, // It's a resource.
                    public ISrsStartable,
                    public ISrsReloadHandler,
                    public ISrsCoroutineHandler,
                    public ISrsExpire
{
    // For the thread to directly access any field of connection.
    friend class SrsPublishRecvThread;

// clang-format off
SRS_DECLARE_PRIVATE: // clang-format on
    ISrsResourceManager *manager_;
    ISrsAppConfig *config_;
    ISrsStreamPublishTokenManager *stream_publish_tokens_;
    ISrsLiveSourceManager *live_sources_;
    ISrsStatistic *stat_;
    ISrsHttpHooks *hooks_;
    ISrsRtcSourceManager *rtc_sources_;
    ISrsSrtSourceManager *srt_sources_;
#ifdef SRS_RTSP
    ISrsRtspSourceManager *rtsp_sources_;
#endif

// clang-format off
SRS_DECLARE_PRIVATE: // clang-format on
    ISrsRtmpServer *rtmp_;
    SrsRefer *refer_;
    SrsBandwidth *bandwidth_;
    ISrsSecurity *security_;
    // The wakable handler, maybe NULL.
    // TODO: FIXME: Should refine the state for receiving thread.
    ISrsWakable *wakable_;
    // The elapsed duration in srs_utime_t
    // For live play duration, for instance, rtmpdump to record.
    srs_utime_t duration_;
    // The MR(merged-write) sleep time in srs_utime_t.
    srs_utime_t mw_sleep_;
    int mw_msgs_;
    // For realtime
    // @see https://github.com/ossrs/srs/issues/257
    bool realtime_;
    // The minimal interval in srs_utime_t for delivery stream.
    srs_utime_t send_min_interval_;
    // The publish 1st packet timeout in srs_utime_t
    srs_utime_t publish_1stpkt_timeout_;
    // The publish normal packet timeout in srs_utime_t
    srs_utime_t publish_normal_timeout_;
    // Whether enable the tcp_nodelay.
    bool tcp_nodelay_;
    // About the rtmp client.
    SrsClientInfo *info_;

// clang-format off
SRS_DECLARE_PRIVATE: // clang-format on
    ISrsRtmpTransport *transport_;
    // Each connection start a green thread,
    // when thread stop, the connection will be delete by server.
    ISrsCoroutine *trd_;
    // The ip and port of client.
    std::string ip_;
    int port_;
    // The delta for statistic.
    ISrsNetworkDelta *delta_;
    SrsNetworkKbps *kbps_;
    // The create time in milliseconds.
    // for current connection to log self create time and calculate the living time.
    int64_t create_time_;

public:
    SrsRtmpConn(ISrsRtmpTransport *transport, std::string cip, int port);
    void assemble();
    virtual ~SrsRtmpConn();
    // Interface ISrsResource.
public:
    virtual std::string desc();

// clang-format off
SRS_DECLARE_PROTECTED: // clang-format on
    virtual srs_error_t do_cycle();

public:
    virtual ISrsKbpsDelta *delta();

// clang-format off
SRS_DECLARE_PRIVATE: // clang-format on
    // When valid and connected to vhost/app, service the client.
    virtual srs_error_t service_cycle();
    // The stream(play/publish) service cycle, identify client first.
    virtual srs_error_t stream_service_cycle();
    virtual srs_error_t check_vhost(bool try_default_vhost);
    virtual srs_error_t playing(SrsSharedPtr<SrsLiveSource> source);
    virtual srs_error_t do_playing(SrsSharedPtr<SrsLiveSource> source, SrsLiveConsumer *consumer, SrsQueueRecvThread *trd);
    virtual srs_error_t publishing(SrsSharedPtr<SrsLiveSource> source);
    virtual srs_error_t do_publishing(SrsSharedPtr<SrsLiveSource> source, SrsPublishRecvThread *trd);
    virtual srs_error_t acquire_publish(SrsSharedPtr<SrsLiveSource> source);
    virtual void release_publish(SrsSharedPtr<SrsLiveSource> source);
    virtual srs_error_t handle_publish_message(SrsSharedPtr<SrsLiveSource> &source, SrsRtmpCommonMessage *msg);
    virtual srs_error_t process_publish_message(SrsSharedPtr<SrsLiveSource> &source, SrsRtmpCommonMessage *msg);
    virtual srs_error_t process_play_control_msg(SrsLiveConsumer *consumer, SrsRtmpCommonMessage *msg);
    virtual void set_sock_options();

// clang-format off
SRS_DECLARE_PRIVATE: // clang-format on
    virtual srs_error_t check_edge_token_traverse_auth();
    virtual srs_error_t do_token_traverse_auth(SrsRtmpClient *client);

// clang-format off
SRS_DECLARE_PRIVATE: // clang-format on
    // When the connection disconnect, call this method.
    // e.g. log msg of connection and report to other system.
    virtual srs_error_t on_disconnect();

// clang-format off
SRS_DECLARE_PRIVATE: // clang-format on
    virtual srs_error_t http_hooks_on_connect();
    virtual void http_hooks_on_close();
    virtual srs_error_t http_hooks_on_publish();
    virtual void http_hooks_on_unpublish();
    virtual srs_error_t http_hooks_on_play();
    virtual void http_hooks_on_stop();
    // Extract APIs from SrsTcpConnection.
    // Interface ISrsStartable
public:
    // Start the client green thread.
    // when server get a client from listener,
    // 1. server will create an concrete connection(for instance, RTMP connection),
    // 2. then add connection to its connection manager,
    // 3. start the client thread by invoke this start()
    // when client cycle thread stop, invoke the on_thread_stop(), which will use server
    // To remove the client by server->remove(this).
    virtual srs_error_t start();
    virtual void stop();
    // Interface ISrsCoroutineHandler
public:
    // The thread cycle function,
    // when serve connection completed, terminate the loop which will terminate the thread,
    // thread will invoke the on_thread_stop() when it terminated.
    virtual srs_error_t cycle();
    // Interface ISrsConnection.
public:
    virtual std::string remote_ip();
    virtual const SrsContextId &get_id();
    // Interface ISrsExpire.
public:
    virtual void expire();
};

#endif