#include "stdafx.h"
#include <iostream>
#include <cstdlib>
#include <windows.h>		// Header file used for the 'sleep' function.
#include <errno.h>
#include <math.h>

using namespace std;

// Optional: your choice if you want to use these definitions for MAX-MIN-Range
int open_ousb(char * command)
{
	FILE * fpipe;
	char line[256];

	if (!(fpipe = (FILE*)_popen(command, "r")))
	{
		// Error exists if FPIPE returns NULL
		cout << "Z" << endl;

		return 0;
	}
	while (fgets(line, sizeof(line), fpipe))
	{
		cout << line << endl;
	}
	_pclose(fpipe);

	return (atoi(line)); // output current led states
}


int main(int argc, char *argv[])
{//--- When no parameters MUST print student ID string in CSV format.
	int portb = 0;
	int Y = 0;
	char * command = "ousb -r io PORTB";
	if (argc == 1)
	{
		// no parameters on command line just the program name
		//---  edit string below: eg: "studentNumber,student_email,student_name"

		cout << "**********************************" << endl;

		//--- When run with just the program name, meaning without parameters
		// your code  MUST print student ID string in CSV format.
		// i.e. simply running
		// the output MUST print student ID string in Comman Separated Version (CSV)
		// format, such as:                  (NOTE the two commas !)
		//          "***********************"
		//      eg: "*********************************"

		return(0); // The convention is to return Zero to signal NO ERRORS, if you change it the AutoTester will
		//assume you have made some major error.  Leave it as zero.
	}



	else if (argc == 2 || argc == 3)
	{ //***************************

		//READ
		cout << "value after reading" << endl;
		portb = open_ousb(command);//reading the current led state and storing it in port b variable

		int X = (int)atof(argv[1]);// convert float to int from atof
		if (argc == 2){
			Y = 1;// if 2 arguments, third arg is 1
		}
		else if (argc == 3){
			Y = (int)atof(argv[2]); // if 3 arguments, third argument is the forced integer value after converting string to a float.
		}
		//error check 3
		if (X > 255 || X < -255)
		{
			cout << "R1" << endl;

			return 0;
		}
		if (Y<1 || Y>65536){
			cout << "R2" << endl;

			return 0;
		}
		for (int i = 1; i <= Y; i++);
		{
			portb = portb + X; //update value to be written
			//error check 4
			if (portb>255)
			{
				portb = portb % 255;
			}

			else if (portb < 0)
			{
				portb = portb + 256;
			}
			char writecommand[100];//array to store write command
			//Write
			sprintf_s(writecommand, "ousb -r io PORTB %i", portb);
			cout << "after writing, the value is: " << endl;
			portb = open_ousb(writecommand);
		}
	}
	else {
		cout << "P" << endl;
	}
	return (0);
}