// rtmp_manager.hpp
#pragma once

#include <gst/gst.h>

#include <atomic>
#include <functional>
#include <future>
#include <memory>
#include <mutex>
#include <string>
#include <thread>
#include <unordered_map>
#include <vector>

#include "app_config.hpp"
#include "data_manager.hpp"

class RTMPManager
{
   public:
    enum class StreamResult
    {
        OK,
        PIPELINE_ERROR,
        CONNECTION_FAIL,
        EOS_RECEIVED,
        TIMEOUT,
        UNKNOWN
    };

    struct StreamStatus
    {
        bool running{false};
        StreamResult last_result{StreamResult::UNKNOWN};
        std::string last_error;
    };

    struct StreamResultInfo
    {
        int loc{-1};
        std::string url;
        int result{1};  // 0 success, 1 fail
        std::string reason;
    };

    using StreamCallback = std::function<void(const std::string &key, StreamStatus)>;

    static void init();
    static void set_status_callback(StreamCallback cb);

    // 单路接口
    static StreamResultInfo start_camera(const Camera &cam, StreamType type);
    static StreamResultInfo stop_camera(const std::string &cam_name, StreamType type);

    // 批量接口：处理 VideoPushRequest
    static std::vector<StreamResultInfo> process_push_request(const VideoPushRequest &req);

    static void stop_all();
    static bool is_streaming(const std::string &cam_name, StreamType type);
    static bool is_any_streaming();
    static std::string get_stream_url(const std::string &cam_name, StreamType type);

   private:
    struct StreamContext
    {
        std::atomic<bool> running{false};
        std::thread thread;
        StreamStatus status;
        int retry_count{0};

        StreamContext() = default;
        StreamContext(const StreamContext &) = delete;
        StreamContext &operator=(const StreamContext &) = delete;
    };

    static std::string make_stream_key(const std::string &cam_name, StreamType type);
    static GstElement *create_pipeline(const Camera &cam, StreamType type);
    static void stream_loop(Camera cam, StreamType type, std::promise<StreamStatus> *status_promise);

    static void update_status(const std::string &key, const StreamStatus &status);

    static std::unordered_map<std::string, std::unique_ptr<StreamContext>> streams;
    static std::mutex streams_mutex;
    static StreamCallback status_callback;

    // 自动重试参数
    static constexpr int MAX_RETRIES = 3;
    static constexpr int RETRY_DELAY_MS = 2000;
};