/* Copyright (c) 2013-2015 Stanislaw Halik <sthalik@misaki.pl>
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 */

#pragma once

#include "ui_aruco-trackercontrols.h"
#include "options/options.hpp"
#include "cv/translation-calibrator.hpp"
#include "api/plugin-api.hpp"
#include "cv/video-widget.hpp"
#include "compat/timer.hpp"

#include "include/markerdetector.h"

#include <QObject>
#include <QThread>
#include <QMutex>
#include <QHBoxLayout>
#include <QDialog>
#include <QTimer>

#include <memory>
#include <cinttypes>

#include <opencv2/core.hpp>
#include <opencv2/videoio.hpp>

// value 0->1
//#define DEBUG_UNSHARP_MASKING .75

//canny thresholding
//#define USE_EXPERIMENTAL_CANNY

using namespace options;

struct settings : opts {
    enum rot
    {
        rot_zero = 0,
        rot_neg = -1,
        rot_plus = +1,
    };

    value<int> fov;
    value<double> headpos_x, headpos_y, headpos_z;
    value<QString> camera_name;
    value<int> force_fps, resolution;
    value<rot> model_rotation;
    settings() :
        opts("aruco-tracker"),
        fov(b, "field-of-view", 56),
        headpos_x(b, "headpos-x", 0),
        headpos_y(b, "headpos-y", 0),
        headpos_z(b, "headpos-z", 0),
        camera_name(b, "camera-name", ""),
        force_fps(b, "force-fps", 0),
        resolution(b, "force-resolution", 0),
        model_rotation(b, "model-rotation", rot_zero)
    {}
};

class aruco_dialog;

class aruco_tracker : protected virtual QThread, public ITracker
{
    Q_OBJECT
    friend class aruco_dialog;
    static constexpr float c_search_window = 1.3f;
public:
    aruco_tracker();
    ~aruco_tracker() override;
    module_status start_tracker(QFrame* frame) override;
    void data(double *data) override;
    void run() override;
    void getRT(cv::Matx33d &r, cv::Vec3d &t);
private:
    bool detect_with_roi();
    bool detect_without_roi();
    bool open_camera();
    void set_intrinsics();
    void update_fps();
    void draw_ar(bool ok);
    void clamp_last_roi();
    void set_points();
    void draw_centroid();
    void set_last_roi();
    void set_rmat();
    void set_roi_from_projection();
    void set_detector_params();
    void cycle_detection_params();

    cv::Point3f rotate_model(float x, float y, settings::rot mode);

    cv::VideoCapture camera;
    QMutex camera_mtx;
    QMutex mtx;
    std::unique_ptr<cv_video_widget> videoWidget;
    std::unique_ptr<QHBoxLayout> layout;
    settings s;
    double pose[6] {}, fps = 0;
    double no_detection_timeout = 0;
    cv::Mat frame, grayscale, color;
    cv::Matx33d r;
#ifdef DEBUG_UNSHARP_MASKING
    cv::Mat blurred;
#endif
    std::vector<cv::Point3f> obj_points {4};
    cv::Matx33d intrinsics = cv::Matx33d::eye();
    aruco::MarkerDetector detector;
    std::vector<aruco::Marker> markers;
    cv::Vec3d t;
    cv::Vec3d rvec, tvec;
    std::vector<cv::Point2f> roi_projection;
    std::vector<cv::Point2f> repr2;
    cv::Matx33d m_r, m_q, rmat = cv::Matx33d::eye();
    cv::Vec3d euler;
    std::vector<cv::Point3f> roi_points {4};
    cv::Rect last_roi { 65535, 65535, 0, 0 };
    Timer fps_timer, last_detection_timer;
    unsigned adaptive_size_pos = 0;
    bool use_otsu = false;

    struct resolution_tuple
    {
        int width;
        int height;
    };

    static constexpr inline const int adaptive_sizes[] =
    {
#if defined USE_EXPERIMENTAL_CANNY
        3,
        5,
        7,
#else
        7,
        9,
        13,
#endif
    };

#if !defined USE_EXPERIMENTAL_CANNY
    static constexpr inline int adaptive_thres = 6;
#else
    static constexpr inline int adaptive_thres = 3;
#endif

    static constexpr inline const resolution_tuple resolution_choices[] =
    {
        { 640, 480 },
        { 320, 240 },
        { 0, 0 }
    };

#ifdef DEBUG_UNSHARP_MASKING
    static constexpr inline double gauss_kernel_size = 3;
#endif

    static constexpr inline double timeout = 1;

    static constexpr inline double timeout_backoff_c = 4./11;

    static constexpr inline float size_min = 0.05;
    static constexpr inline float size_max = 0.5;

    static constexpr inline double RC = .25;
};

class aruco_dialog : public ITrackerDialog
{
    Q_OBJECT
public:
    aruco_dialog();
    void register_tracker(ITracker * x) override { tracker = static_cast<aruco_tracker*>(x); }
    void unregister_tracker() override { tracker = nullptr; }
private:
    Ui::Form ui;
    aruco_tracker* tracker;
    settings s;
    TranslationCalibrator calibrator;
    QTimer calib_timer;
private Q_SLOTS:
    void doOK();
    void doCancel();
    void toggleCalibrate();
    void cleanupCalib();
    void update_tracker_calibration();
    void camera_settings();
    void update_camera_settings_state(const QString& name);
};

class aruco_metadata : public Metadata
{
    QString name() { return QString("aruco -- paper marker tracker"); }
    QIcon icon() { return QIcon(":/images/aruco.png"); }
};