#pragma once
#include "image.hpp"
#include <atomic>
#include <memory>
#include <optional>
#include <string>
#include <nlohmann/json.hpp>

namespace cms {
struct CameraConfig {
    std::string device{"/dev/video5"};
    int width{1920},height{1536},fps{30},buffers{4},timeout_ms{2000};
};
struct CapturedFrame {
    CaptureMetadata metadata;
    std::shared_ptr<const BgrImage> image;
    // Present only for offline replay; keeps original timestamps and context.
    std::shared_ptr<const nlohmann::json> replay_record;
};
// The capture thread exclusively owns read(); requestStop() is thread safe.
class Camera {
public:
    explicit Camera(CameraConfig config);
    ~Camera();
    Camera(Camera const&)=delete;
    Camera& operator=(Camera const&)=delete;
    std::optional<CapturedFrame> read();
    void requestStop() noexcept;
private:
    struct Impl;
    std::unique_ptr<Impl> impl_;
};
std::uint64_t monotonicNs();
}