/* *******************************************************
   * Author: Nikitas N. Karanikolas, Assistant Professor *
   * Creation Date: February 21, 2009                    *
   ******************************************************* */

#include <stdio.h>

#include "types.h"

#define overtime_multiplyer 1.50
#define saturday_multiplyer 1.75
#define sunday_multiplyer   2.00

void employee_payroll(personnel_rec emp, int overtime_hours,
                      int saturday_hours, int sunday_hours) {
   int i;
   char tmp_str[snamesize+1];
   float total = emp.salary +
      emp.salary/175*overtime_hours*overtime_multiplyer +
      emp.salary/175*saturday_hours*saturday_multiplyer +
      emp.salary/175*sunday_hours*sunday_multiplyer;
   printf("%s ",emp.key);
   strcpy(tmp_str,  emp.sname);
   for (i=strlen(emp.sname); i<snamesize; i++) tmp_str[i]=' ';
   tmp_str[snamesize]='\0';
   printf("%s ",tmp_str);
   strcpy(tmp_str,  emp.fname);
   for (i=strlen(emp.fname); i<fnamesize; i++) tmp_str[i]=' ';
   tmp_str[fnamesize]='\0';
   printf("%s ",tmp_str);
   printf("%8.2f\n", emp.salary);
   printf("%32c Overtime hours: %2d\n", ' ', overtime_hours);
   printf("%32c Saturday hours: %2d\n", ' ', saturday_hours);
   printf("%32c Sunday hours  : %2d\n", ' ', sunday_hours);
   printf("%53c %8.2f\n\n", ' ', total);
}

main (int argc, char *argv[]) {
   personnel_rec emp;
   overtime_rec ot;
   int eof1, eof2;
   FILE *fp1, *fp2;

   if (argc<3) {
      fprintf(stderr,"You should provide:\n1. the name of "
      "the existing master file");
      fprintf(stderr,"\n2. the name of the overtime "
      "transactions file.\n");
      exit(1);
   }
   fp1=fopen(argv[1],"rb");
   if (fp1==NULL) {
      fprintf(stderr,"Can not open [%s] for reading.\n",
      argv[1]);
      exit(2);
   }
   fp2=fopen(argv[2],"rb");
   if (fp2==NULL) {
      fprintf(stderr,"Can not open [%s] for reading.\n",
      argv[2]);
      fclose(fp1);
      exit(3);
   }

   eof1=fread(&emp,sizeof(personnel_rec),1,fp1)<1;
   eof2=fread(&ot,sizeof(overtime_rec),1,fp2)<1;
   while ((!eof1) && (!eof2))
      if (strcmp(emp.key, ot.key)<0) {
         employee_payroll(emp,0,0,0);
         eof1=fread(&emp,sizeof(personnel_rec),1,fp1)<1;
      }
      else if (strcmp(emp.key, ot.key)==0) {
         employee_payroll(emp,ot.overtime_hours,
         ot.saturday_hours,ot.sunday_hours);
         eof1=fread(&emp,sizeof(personnel_rec),1,fp1)<1;
         eof2=fread(&ot,sizeof(overtime_rec),1,fp2)<1;
      }
      else /* strcmp(emp.key, ot.key)>0 */ {
         /* abnormal case */
         fprintf(stderr,"There is an overtime transaction "
         "with key [%s] that does not corresponds to an "
         "employee. ", ot.key);
         fprintf(stderr,"This overtime transaction will be "
         "ignored.\n");
         eof2=fread(&ot,sizeof(overtime_rec),1,fp2)<1;
      }
   while (!eof1) {
      employee_payroll(emp,0,0,0);
      eof1=fread(&emp,sizeof(personnel_rec),1,fp1)<1;
   }

   fclose(fp1);
   fclose(fp2);
}