#include <iostream>
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>

#include <sys/types.h>
#include <sys/stat.h>

#include <string>

using namespace std;

const string REQUEST{"DieServerRequest"};
const string ANSWER{"DieServerAnswer"};


int main() {
   int sides;

   srand(time(nullptr));

   if (mkfifo(REQUEST.c_str(), S_IRUSR| S_IWUSR|S_IRGRP|S_IROTH) == -1) {
       perror("mkfifo failed Request");
       exit(-1);
   }

   if (mkfifo(ANSWER.c_str(), S_IWUSR| S_IRUSR|S_IRGRP|S_IROTH) == -1) {
       perror("mkfifo failed Anser");
       unlink(REQUEST.c_str());
       exit(-1);
   }

   int request, answer;

   request = open("DieServerRequest", O_RDONLY);
   if (request < 0) {
      perror("open Request");
   }

   answer = open("DieServerAnswer", O_WRONLY);
   if (answer < 0) {
      perror("open Answer");
   }

   ssize_t size = read(request, &sides, sizeof(int));
   while  (sides >= 0) {
      if (size > 0) {
          cout << "got " << sides << " sides, " << size <<  " size." << endl;
          int result{0};
          if (sides > 0) {
             result = rand() % sides + 1;
          }
          write(answer, &result, sizeof(int));
      }
      size = read(request, &sides, sizeof(int));
   }

   if ( 0 != unlink(REQUEST.c_str())) {
      perror("Unlink request");
   }

   if (0 != unlink(ANSWER.c_str())) {
      perror("Unlink answer");
   }

   return 0;
}