#pragma once

#include <map>
#include <memory>
#include <vector>

#include <libcamera/base/signal.h>
#include <libcamera/formats.h>

namespace libcamera {
class Camera;
class CameraConfiguration;
class CameraManager;
class FrameBufferAllocator;
class Request;
} // namespace libcamera

class Image;
class Pixels;

class OV9281
{
public:
    ~OV9281();

public:
    static std::vector<std::shared_ptr<OV9281>> search(
        std::unique_ptr<libcamera::CameraManager> &manager);

    // public functions
public:
    bool startStream();
    void printControls();

    // signals
public:
    // TODO: image->pixels in separate thread
    // TODO: respect sender/receiver threads
    libcamera::Signal<std::shared_ptr<Pixels>> newPixels;
    libcamera::Signal<std::shared_ptr<Image>> newImage;

private:
    explicit OV9281(const std::shared_ptr<libcamera::Camera> &camera);

    // private functions
private:
    bool init();
    bool validateConfig();
    bool applyConfig();

    void onRequestCompleted(libcamera::Request *completed_request);

    // constants
private:
    static inline constexpr auto pixelFormat{libcamera::formats::R8};
    static inline constexpr unsigned int bufferCount{2};
    static inline constexpr size_t desiredFPS{144};

    // member variables
private:
    std::shared_ptr<libcamera::Camera> m_camera{nullptr};
    std::unique_ptr<libcamera::CameraConfiguration> m_config{nullptr};
    std::map<int, std::pair<void *, unsigned int>> m_mappedBuffers;
    std::vector<std::unique_ptr<libcamera::Request>> m_requests;
    std::unique_ptr<libcamera::FrameBufferAllocator> m_allocator{nullptr};

    // TODO: set exposureTime from outside
    int32_t m_exposureTime{3000};
};