/*-----------------------------------------*\
|  SteelSeriesApexBaseController.h          |
|                                           |
|  Base controller for SteelSeries Apex     |
|  Keyboard lighting controllers            |
|                                           |
|  Florian Heilmann (FHeilmann) 19/10/2020  |
\*-----------------------------------------*/

#include "RGBController.h"
#include "SteelSeriesGeneric.h"

#include <string>
#include <cstring>

#pragma once

#define STEELSERIES_PACKET_IN_SIZE 64
#define STEELSERIES_PACKET_OUT_SIZE STEELSERIES_PACKET_IN_SIZE + 1

class SteelSeriesApexBaseController
{
public:

    virtual ~SteelSeriesApexBaseController()
    {

    }

    std::string GetDeviceLocation()
    {
        return("HID: " + location);
    };

    steelseries_type        proto_type;

    /*----------------------------------------*\
    | The serial number of the keyboard is     |
    | acquired by sending an output report     |
    | to address 0xFF and reading the result.  |
    | The HID capability table is not used.    |
    | The serial number also contains the model|
    | number which can be used to determine    |
    | the physical layout of different region  |
    | keyboards throughout the product stack.  |
    \*----------------------------------------*/

    std::string GetSerialString()
    {
        std::string return_string = "";
        if(proto_type == APEX)
        {
            unsigned char obuf[STEELSERIES_PACKET_OUT_SIZE];
            unsigned char ibuf[STEELSERIES_PACKET_IN_SIZE];
            int result;

            memset(obuf, 0x00, sizeof(obuf));
            obuf[0x00] = 0;
            obuf[0x01] = 0xFF;
            hid_write(dev, obuf, STEELSERIES_PACKET_OUT_SIZE);

            result = hid_read_timeout(dev, ibuf, STEELSERIES_PACKET_IN_SIZE, 2);

            /*---------------------------------------*\
            | Only the first 19 bytes are of value    |
            \*---------------------------------------*/
            if( result > 0)
            {
                std::string serialnum(ibuf, ibuf+19);
                return_string = serialnum;
            }
        }

         return(return_string);
    }

    std::string GetVersionString()
    {

        std::string return_string = "Unsupported protocol";

        if(proto_type == APEX)
        {
            /*--------------------------------------------*\
            | For the Apex Pro there are two firmware      |
            | versions which can be acquired, KBD and LED. |
            | We know where both are located, we do not    |
            | know which is what. For now we'll make an    |
            | assumption and fix if proven wrong.          |
            \*--------------------------------------------*/

            unsigned char obuf[STEELSERIES_PACKET_OUT_SIZE];
            unsigned char ibuf[STEELSERIES_PACKET_IN_SIZE];
            int result;

            memset(obuf, 0x00, sizeof(obuf));
            obuf[0x00] = 0;
            obuf[0x01] = 0x90;
            hid_write(dev, obuf, STEELSERIES_PACKET_OUT_SIZE);
            result = hid_read_timeout(dev, ibuf, STEELSERIES_PACKET_IN_SIZE, 2);

            if(result > 0)
            {
                std::string fwver(ibuf, ibuf+STEELSERIES_PACKET_IN_SIZE);
                fwver = fwver.c_str();

                /*---------------------------------------*\
                | Find 2 periods in string, if found we   |
                | can form a X.Y.Z revision.              |
                \*---------------------------------------*/

                std::size_t majorp = fwver.find('.');
                if(majorp != std::string::npos)
                {
                    std::size_t minorp = fwver.find('.', majorp+1);
                    if(minorp != std::string::npos)
                    {
                        std::string major = fwver.substr(0, majorp);
                        std::string minor = fwver.substr(majorp+1, (minorp-majorp-1));
                        std::string build = fwver.substr(minorp+1);
                        return_string = "KBD: " + major + "." + minor + "." + build;
                    }
                }
            }

            /*---------------------------------------*\
            | Clear and reuse buffer                  |
            \*---------------------------------------*/
            memset(ibuf, 0x00, sizeof(ibuf));
            obuf[0x02] = 0x01;
            hid_write(dev, obuf, STEELSERIES_PACKET_OUT_SIZE);
            result = hid_read_timeout(dev, ibuf, STEELSERIES_PACKET_IN_SIZE, 10);

            if(result > 0)
            {
                std::string fwver(ibuf, ibuf+STEELSERIES_PACKET_IN_SIZE);
                fwver = fwver.c_str();

                std::size_t majorp = fwver.find('.');
                if(majorp != std::string::npos)
                {
                    std::size_t minorp = fwver.find('.', majorp+1);
                    if(minorp != std::string::npos)
                    {
                        std::string major = fwver.substr(0, majorp);
                        std::string minor = fwver.substr(majorp+1, (minorp-majorp-1));
                        std::string build = fwver.substr(minorp+1);
                        return_string = return_string + " / LED: " + major + "." + minor + "." + build;
                    }
                }
            }
        }
        return(return_string);
    }

    virtual void SetMode
        (
        unsigned char mode,
        std::vector<RGBColor> colors
        ) = 0;

    virtual void SetLEDsDirect(std::vector<RGBColor> colors) = 0;

protected:
    std::string             location;
    hid_device*             dev;
    unsigned char           active_mode;
};