// hardware drivers 
//
// Contains:    CIS, MotorBoard, ...
//
// Date:        2023-12-18

#include <sane_opt_json/base_opt.h>
#include <functional>
#include <base/packet.h>
#include <base/data.h>
#include <memory>
#include <map>
#include <utility>

// image handler callback proto
//
// dyn_mem_ptr: image data buffer, or be uint32_t if bool was false
//
// bool:        true - image, dyn_mem_ptr is image data buffer; false - dyn_mem_ptr is an uint32_t code of hardware event
//
// LPPACKIMAGE: image information, or uint32_t event data when bool is false
#define IMAGE_HANDLER_PROTO     void(dyn_mem_ptr, bool, LPPACKIMAGE)

#include "./cis/FpgaComm.h"
class GVideoISP1;
class gVideo;
class MotorBoard;

class scanner_hw : public sane_opt_provider
{
    std::function<IMAGE_HANDLER_PROTO>  img_handler_ = std::function<IMAGE_HANDLER_PROTO>();
    volatile bool                       scanning_ = false;
    int                                 time_to_exit_auto_scan_ = 60;   // seconds
    std::unique_ptr<FpgaComm>           img_controller_;
    std::unique_ptr<gVideo>             camera_;
    std::unique_ptr<MotorBoard>         motor_;
    std::unique_ptr<std::thread>        scan_thread_;
    safe_fifo<std::pair<int, int>>      mb_events_;
    
    enum
    {
        SIDE_FRONT = 0,
        SIDE_BACK,
        SIDE_COUNT,
    };
    enum
    {
        COLOR_IND_BLUE = 0,
        COLOR_IND_GREEN,
        COLOR_IND_RED,
        COLOR_IND_COUNT,
    };
    std::string     mode_;
    std::string     family_ = "G200";
    PACKIMAGE       img_base_;
    volatile bool   auto_scan_ = false;
    int             scan_count_ = -1;
    int             cis_length_ = 3888;
    bool            cis_led_ = true;
    int             dpi_ = 300;
    int             baud_ = 921600;
    int             delay_ = 1000;
    int             frame_h_ = 12;
    int             sample_ = 256;
    int             sp_ = 816;
    int             exposure_[SIDE_COUNT][COLOR_IND_COUNT];
    int             gain_[SIDE_COUNT][FpgaComm::CIS_SECTOR_COUNT];
    int             off_[SIDE_COUNT][FpgaComm::CIS_SECTOR_COUNT];
    double          stretch_h_ = 1.0f;
    double          stretch_v_ = 1.0f;

    std::string     paper_ = "\345\214\271\351\205\215\345\216\237\345\247\213\345\260\272\345\257\270";
    bool            lateral_ = false;
    bool            lateral_en_ = false;
    bool            staple_chk_ = true;
    bool            screw_chk_ = true;
    int             screw_chk_level_ = 3;
    bool            paper_on_ = false;
    bool            double_chk_ = true;
    int             motor_speed_ = /*SPEED_PPM_100*/0;
    std::map<std::string, std::function<void(void*)>>   opt_handler_;


    void init(void);
    void init_version(std::string& text);
    void thread_image_capture(void);
    bool is_scan_fatal(void);
    void retrieve_v4l2_mem(safe_fifo<int>* mem, int* used);
    void set_gain_value(bool front, bool gain, int sector, int val);

public:
    scanner_hw();
protected:
    ~scanner_hw();

    // sane_opt_provider
public:
	// return malloc(), real data size stored in parameter 'size'. invoker should free() the returned value
	virtual char* get_value(const char* name, void* value, size_t* size, int* err = nullptr) override;
    virtual int set_value(const char* name, void* val) override;
	virtual void enable(const char* name, bool able) override;

    // operation ...
public:
    int open(std::function<IMAGE_HANDLER_PROTO> image_handler);
    int start_scan(void);
    int stop_scan(void);
    int close(void);
    bool is_scanning(void);
};