#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>

struct Server
{
  int l;          // stores number of vowels
  int m;          // stores number of vowels
  int n;          // stores number of vowels
  char charbuff1[7]; // buffer holds a character
  char outchar1[8];  // server puts string here
  char charbuff2[7]; // buffer holds a character
  char outchar2[8];  // server puts string here
  char charbuff3[7]; // buffer holds a character
  char outchar3[8];  // server puts string here
}
  inst;
  main (void)
  {
  memset(inst.charbuff1,0,7);
  memset(inst.outchar1,0,8);
  memset(inst.charbuff2,0,7);
  memset(inst.outchar2,0,8);
  memset(inst.charbuff3,0,7);
  memset(inst.outchar3,0,8);
  struct Server;
  int i;
  int fda;      // to read from client
  int fdb;      // to write to client

  /* Create the fifos and open them  */
  if ((mkfifo("FIFO1",0666)<0 && errno != EEXIST))
        {
        perror("cant create FIFO1");
        exit(-1);
        }

   if ((mkfifo("FIFO2",0666)<0 && errno != EEXIST))
        {
        perror("cant create FIFO2");
        exit(-1);
        }

  if((fda=open("FIFO1", O_RDONLY))<0)
     printf("cant open fifo to write");

  if((fdb=open("FIFO2", O_WRONLY))<0)
     printf("cant open fifo to read");

  read(fda, &inst, sizeof(inst)); //read the struct from client


  for( i = 0; i<6; i++) //for loop to write the first string from charbuff array to outchar array
  {
    inst.outchar1[i] = inst.charbuff1[i];
    inst.outchar1[6] = 0;
  }
  printf("\nServer: first string is: %s", inst.outchar1);

  inst.l = 0;

  for( i = 0; i<6; i++) //for loop to check for non-lowercase characters
  {
  if(inst.outchar1[i] < 'a' && inst.outchar1[i] > 'z') //if a character isn't lowercase, set l to 9
  {
    inst.l = 9;
    break;
  }
  else if(inst.outchar1[i] = 'a' || 'e' || 'i' || 'o' || 'u') //if a character is a vowel, increment l by 1
  {
    inst.l++;
  }
  else //if a character is a lowercase consonant, do nothing
  {
    inst.l;
  }
  }
  printf("\nServer: Checked for uppercase letters");

  if(inst.l = 9) //if an invalid character was encountered
  {
    printf("\nServer: There are uppercase letters");
  }
  else //if no invalid character was encountered
  {
    printf("\nServer: There are no uppercase letters");
    printf("\nServer: The humber of vowels are: %d", inst.l);
  }

  for( i = 0; i<6; i++) //for loop to write the second string from charbuff array to outchar array
  {
    inst.outchar2[i] = inst.charbuff2[i];
    inst.outchar2[6] = 0;
  }
  printf("\nServer: second string is: %s", inst.outchar2);

  inst.m = 0;

  for( i = 0; i<6; i++) //for loop to check for non-lowercase characters
  {
  if(inst.outchar1[i] < 'a' && inst.outchar1[i] > 'z') //if a character isn't lowercase, set m to 9
  {
    inst.m = 9;
    break;
  }
  else if(inst.outchar2[i] = 'a' || 'e' || 'i' || 'o' || 'u') //if a character is a vowel, increment m by 1
  {
    inst.m++;
  }
  else //if a character is a lowercase consonant, do nothing
  {
    inst.m;
  }
  }
  printf("\nServer: Checked for uppercase letters");

  if(inst.m = 9) //if an invalid character was encountered
  {
    printf("\nServer: There are uppercase letters");
  }
  else //if no invalid character was encountered
  {
    printf("\nServer: There are no uppercase letters");
    printf("\nServer: The humber of vowels are: %d", inst.m);
  }

  for( i = 0; i<6; i++) //for loop to write the third string from charbuff array to outchar array
  {
    inst.outchar3[i] = inst.charbuff3[i];
    inst.outchar3[6] = 0;
  }
  printf("\nServer: third string is: %s", inst.outchar3);

  inst.n = 0;

  for( i = 0; i<6; i++) //for loop to check for non-lowercase characters
  {
  if(inst.outchar1[i] < 'a' && inst.outchar1[i] > 'z') //if a character isn't lowercase, set n to 9
  {
    inst.n = 9;
    break;
  }
  else if(inst.outchar3[i] = 'a' || 'e' || 'i' || 'o' || 'u') //if a character is a vowel, increment n by 1
  {
    inst.n++;
  }
  else
  {
    inst.n; //if a character is a lowercase consonant, do nothing
  }
  }
  printf("\nServer: Checked for uppercase letters");

  if(inst.n = 9) //if an invalid character was encountered
  {
    printf("\nServer: There are uppercase letters");
  }
  else //if no invalid character was encountered
  {
    printf("\nServer: There are no uppercase letters");
    printf("\nServer: The humber of vowels are: %d", inst.n);
  }
  write(fdb, &inst, sizeof(inst));
  printf("\nServer: This says I am ready to close.\n ");

  close(fda);
  close(fdb);
  unlink("FIFO1");
  unlink("FIFO2");

        return 0;
}