#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <stddef.h>

/*-------------Global  Variables------------------*/

double rate1, rate2; //in Mbps
double length1, length2; //in msec
double start_time, period;
int pack_size;
char *Out_FILE_NAME;
//s, *Out_FILE_NAME1;

main(int argc, char *argv[])
{
       
  if (argc != 8){
    printf(" Error! You need to input rate1 length1 rate2 length2 period pack_size and Output-Dada-File-Name\n");
            exit(0);
  }

  rate1            = atof(argv[1]); //Mbps
  length1          = atof(argv[2]); //ms
  rate2            = atof(argv[3]); //Mbps
  length2          = atof(argv[4]); //ms
  period           = atof(argv[5]); //ms
  pack_size        = atoi(argv[6]); //Bytes
  Out_FILE_NAME    = argv[7];
  //s  Out_FILE_NAME1   = argv[8];

      
    if(Option_1()!=1){
      printf("\n Error in Option 1");
      exit(0);
    } 

 exit(0);
  
}

/***************************************************************/
int Option_1()
{
 double time_now, time_next, time_diff, time_beg_per;

 FILE * outfp;
 FILE * outfp1;

  if( (outfp = fopen(Out_FILE_NAME,"wb"))==NULL){
   printf("\n Open Out file error\n");
   exit(1);
 }

  //s  if( (outfp1 = fopen(Out_FILE_NAME1,"wb"))==NULL){
  //s    printf("\n Open Out file error\n");
  //s   exit(1);
  //s }


  time_beg_per = 0; //ms
  time_now = 0; //ms

while ((time_now/1000.0)< 205.0) {
    
 if (time_now < time_beg_per + length1) { 
   //   fprintf(outfp1,"%f %d\n", time_now/1000.0+20.0, 10); 
   time_diff = ((pack_size*8.0)/(rate1*1000000.0))*1000.0; //ms
     time_now = time_now + time_diff;
 } else {
 if ((time_now >= time_beg_per+length1) && (time_now < time_beg_per+length1+length2)){
     time_diff = ((pack_size*8.0)/(rate2*1000000.0))*1000.0; //ms
     //     fprintf(outfp1,"%f %d\n", time_now/1000.0+20.0, 5);
     time_now = time_now + time_diff;
    } else 
    {
      //      fprintf(outfp1,"%f %d\n", time_now/1000.0+20.0, 0);
      time_beg_per = time_beg_per + period;
      time_diff = time_beg_per - time_now;
      time_now = time_beg_per;
      //s down
      //      time_diff = time_diff/1000.0;
      //s up
      //      fprintf(outfp1,"%f %d\n", time_now/1000.0+20.0, 0);
    }
 }

//fprintf(outfp,"%f %f %d\n", time_now*1000.0, time_diff*1000.0, pack_size); 
 //s  fprintf(outfp,"%f %d\n", time_diff*1000.0, pack_size); 
 fprintf(outfp,"%f\n", time_diff); //s print in msec

//output is in micro sec
 //fprintf(outfp, "%f %d\n", 5000.0, pack_size);

  }


  fclose (outfp);
  //s  fclose (outfp1);
  return(1);
}