//-----------------------------------------------------------------------------
// ass-b1.c
//
// The program takes a string and interprets it firstly. The first thing which
// the program does is checks whether the string is either
// a) Empty
// b) Too short
// Should it be either of these two, it returns the values -1 and -2
// respectively.
// After that, the program takes the string defined and turns it around
// with each word being inverted. This is done through the function
// reversePrint. The output value is a reversed string with each word
// being reversed separately, as well as starting letters being capitalised
// and every other letter being lower-case.
//
// Group: Group 18, study assistant Kevin Innerebner
//
// Authors: Vedad Misirlic 11833774
//-----------------------------------------------------------------------------
//

#include <stdio.h>
#include <ctype.h>
//-----------------------------------------------------------------------------
///
/// This is the reversePrint function. It checks whether the values are
/// okay. If they are, the reversePrint is performed.
///
/// @parameter *name  This is the paramater which is given into the program
/// in order to perform the whole function.
///
/// @return 0 for success, -1 for for empty string, -2 for too short input
//

int reversePrint(char *name)
{
  int begin_counter = 0;
  int end_counter = 0;
  int main_counter = 0;
  int space_counter = 0;
  int return_value = 0;
  int check_done = 0;

  //This part starts the check and goes throughout the whole program.
  // The check is actually performed just once.
  for (check_done = 0; check_done < 1; check_done++) {
    if (*name == 0)
    {
      //This part returns the value -1 and ends the whole loop, skipping the
      //implementation of the reverse action.
      return_value = -1;
      break;
    }
    for (main_counter = 0; (*(name + main_counter)) != 0; main_counter++) {
      if (*(name + main_counter) == 32 && *(name + main_counter + 1) != 0)
        space_counter++;
    }
    //This part returns the value -2 and ends the whole loop, skipping the
    //implementation of the reverse action.
    if (space_counter == 0) {
      return_value = -2;
      break;
    }
    else
      //This part includes and reverses the whole string.
      {
      //We start the for loop buffering until the end of the input
      for (main_counter = 0; (*(name + main_counter)) != 0; main_counter++)
      {
        //Should we find a space, then we print the first word.
        if (*(name + main_counter) == 32)
        {
          //The end counter is defined as the main counter -1, pointing to the
          // end of the word.
          for (end_counter = main_counter - 1; end_counter >= begin_counter; end_counter--)
          {
            //This prints the first letter as uppercase.
            if (end_counter == main_counter - 1)
            {
              printf("%c", toupper(*(name + end_counter)));
            }
            //This prints all other letters as lowercase
            else
              {
              printf("%c", tolower(*(name + end_counter)));
              }
          }
          //adds a space at the end of the word to make space for the next word
          //and sets the begin counter to be equal to the next value of the
          //first next word, which is on the position of the space +1
          printf(" ");
          begin_counter = main_counter + 1;
        }
        //This prints out the last word in the string, as it detects whether
        //it is the null byte.
        if ((*(name + main_counter + 1)) == 0)
        {
          for (end_counter = main_counter; end_counter >= begin_counter; end_counter--)
          {
            if (end_counter == main_counter)
            {
              printf("%c", toupper(*(name + end_counter)));
            } else
              {
              printf("%c", tolower(*(name + end_counter)));
            }
          }
        }
      }
      return_value = 0;
    }
  }
  //returns the value to the function
  return return_value;
}

//-----------------------------------------------------------------------------
///
/// This is the main function which calls the reversePrint function.
///
/// @parameter is empty
///
/// @return always 0
//
int main() {
  char name[] = "Vedad Misiric";
  reversePrint(name);
  return 0;
}