/* Homepage         http://facetracknoir.sourceforge.net/home/default.htm        *
 *                                                                               *
 * ISC License (ISC)                                                             *
 *                                                                               *
 * Copyright (c) 2015, Wim Vriend                                                *
 *                                                                               *
 * 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.             *
 */
#include "ftnoir_protocol_fsuipc.h"
#include "opentrack/plugin-api.hpp"

FTNoIR_Protocol::FTNoIR_Protocol()
{
	prevPosX = 0.0f;
	prevPosY = 0.0f;
	prevPosZ = 0.0f;
	prevRotX = 0.0f;
	prevRotY = 0.0f;
	prevRotZ = 0.0f;
}

FTNoIR_Protocol::~FTNoIR_Protocol()
{
    FSUIPC_Close();
    FSUIPCLib.unload();
}

int FTNoIR_Protocol::scale2AnalogLimits( float x, float min_x, float max_x ) {
double y;
double local_x;
	
	local_x = x;
	if (local_x > max_x) {
		local_x = max_x;
	}
	if (local_x < min_x) {
		local_x = min_x;
	}
	y = ( 16383 * local_x ) / max_x;

	return (int) y;
}

void FTNoIR_Protocol::pose(const double *headpose ) {
    DWORD result;
    TFSState pitch;
    TFSState yaw;
    TFSState roll;
    WORD FSZoom;

    float virtPosX;
    float virtPosY;
    float virtPosZ;

    float virtRotX;
    float virtRotY;
    float virtRotZ;

//	qDebug() << "FSUIPCServer::run() says: started!";

    virtRotX = -headpose[Pitch];				// degrees
    virtRotY = headpose[Yaw];
    virtRotZ = headpose[Roll];

	virtPosX = 0.0f;											// cm, X and Y are not working for FS2002/2004!
	virtPosY = 0.0f;
    virtPosZ = headpose[TZ];

	//
	// Init. the FSUIPC offsets (derived from Free-track...)
	//
	pitch.Control = 66503;
	yaw.Control = 66504;
	roll.Control = 66505;

	//
	// Only do this when the data has changed. This way, the HAT-switch can be used when tracking is OFF.
	//
	if ((prevPosX != virtPosX) || (prevPosY != virtPosY) || (prevPosZ != virtPosZ) ||
		(prevRotX != virtRotX) || (prevRotY != virtRotY) || (prevRotZ != virtRotZ)) {
		//
		// Open the connection
		//
		FSUIPC_Open(SIM_ANY, &result);

		//
		// Check the FS-version
		//
		if  (((result == FSUIPC_ERR_OK) || (result == FSUIPC_ERR_OPEN)) && 
			 ((FSUIPC_FS_Version == SIM_FS2K2) || (FSUIPC_FS_Version == SIM_FS2K4))) {
//			qDebug() << "FSUIPCServer::run() says: FSUIPC opened succesfully";
			//
			// Write the 4! DOF-data to FS. Only rotations and zoom are possible.
			//
			pitch.Value = scale2AnalogLimits(virtRotX, -180, 180);
			FSUIPC_Write(0x3110, 8, &pitch, &result);

			yaw.Value = scale2AnalogLimits(virtRotY, -180, 180);
			FSUIPC_Write(0x3110, 8, &yaw, &result);

			roll.Value = scale2AnalogLimits(virtRotZ, -180, 180);
			FSUIPC_Write(0x3110, 8, &roll, &result);

			FSZoom = (WORD) (64/50) * virtPosZ + 64;
			FSUIPC_Write(0x832E, 2, &FSZoom, &result);

			//
			// Write the data, in one go!
			//
			FSUIPC_Process(&result);
			if (result == FSUIPC_ERR_SENDMSG) {
                // FSUIPC checks for already open connections and returns FSUIPC_ERR_OPEN in that case
                // the connection scope is global for the process. this is why above code doesn't
                // leak resources or have logic errors. see: http://www.purebasic.fr/english/viewtopic.php?t=31112
				FSUIPC_Close();							//timeout (1 second) so assume FS closed
			}
		}
	}

	prevPosX = virtPosX;
	prevPosY = virtPosY;
	prevPosZ = virtPosZ;
	prevRotX = virtRotX;
	prevRotY = virtRotY;
	prevRotZ = virtRotZ;
}

bool FTNoIR_Protocol::correct()
{   
	qDebug() << "correct says: Starting Function";

	//
	// Load the DLL.
	//
    FSUIPCLib.setFileName( s.LocationOfDLL );
    if (FSUIPCLib.load() != true) {
        qDebug() << "correct says: Error loading FSUIPC DLL";
        return false;
    }
    else {
        qDebug() << "correct says: FSUIPC DLL loaded.";
    }

	return true;
}

OPENTRACK_DECLARE_PROTOCOL(FTNoIR_Protocol, FSUIPCControls, FTNoIR_ProtocolDll)