#include <iostream>
#include <math.h>
#include<time.h>
#include <fstream>

using namespace std;
float randNum()
{
float x,y,r;

x = rand();
y = RAND_MAX;
r = x/y;

return r;

}

int main ()
{
ofstream fileout(" themba.csv") ;
// Varaible Declaration
int i=1,num,mL,mD,mW,count=0,N=1;
cout<<"please enter total number of arrival jobs:"<<endl;
cin>>num;
float t,tL,D_proctime,t_sim,simulation_t[i],depart_time[count],R,diff,currenttime=0,nextdepaturet,nextarrivalt,QueueL=0;
float q,pL,pD,A=0,B=0,D,array[num] ,arrayL[num],arrivalD[count],arrivalW[count],arraytotL,arrayTot;

//INPUTS//

cout<<"please enter arrival rate:"<<endl;
cin>>q;
cout<<"please enter total number lathe machines:"<<endl;
cin>>mL;
cout<<"Please enter processing rate for lathe: "<<endl;
cin>>pL;

while (i<num)
{

// arrival time for cutting department

t=(log(randNum()))/(-q);
A=A +t;
array[i]=A;
cout<<"arrival t= \t"<<array[i]<<endl;




// processing time for lathes
if (( N>=1)&&(N<=mL))
{

tL=(log(randNum()))/(-N*pL);
B=B +tL;
arrayL[i] =B;
cout<<"proc time= \t"<<arrayL[i]<<endl;
}
else if ( N>mL)
{
tL=(log(randNum()))/(-mL*pL);
B=B +tL;
arrayL[i] =B;
cout<<"proc time= \t"<<arrayL[i]<<endl;
}


//Simualtionn for number of jobs in the cuuting department

diff=(tL-t); // comparing the interarrival time with processing time

t_sim=t_sim+tL; // this is simulation time of the cutting department
simulation_t[i]=t_sim;

if ( diff<0)
{
N=N+1; // increament increasing the # of job in the system
cout<<"N= \t"<<N<<endl;


simulation_t[i-1]=array[i];


}
else if(diff>0)
{
N=N-1;
cout<<"N= \t"<<N<<endl;


depart_time[count]=simulation_t[i-1]; // storing the departure time in array for further use
count=count+1;



}
else
{
N=N;

cout<<"N= \t"<<N<<endl;

}
i=i+1;

QueueL=(N-mL);
cout<<"Queue length= \t"<<QueueL<<endl;




fileout<<arrayL[i]<<","<<N<<","<<QueueL<<","<<endl;

}




for ( count=0; count<num ;count++)
{
R=randNum();



if ( R<0.3)
{
arrivalW[count]=depart_time[count];
cout<<" welding arrival_t= \t"<<arrivalW[count]<<endl;

}
else
{
arrivalD[count]=depart_time[count];
cout<<" drilling arrival_t= \t"<< arrivalD[count]<<endl;


}
}

return 0;