#include "types.h"
#include <stdio.h>

/**
 * Determine whether the provided character is alphabetic.
 *
 * @param c character
 *
 * @return true when the provided character `c` is alphabetic;
 *    false otherwise
 */
bool is_alpha(char c) {
  // TODO: 1. Check whether the value in c represents an alphabetic ASCII
  // character
  return ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'));
}

/**
 * Determine whether all characters of the provided `string`
 *    (character array) are alphabetic.
 *
 * @param string input string
 *
 * @return true when all characters in the provided string are alphabetic;
 * 	  false otherwise
 */
bool is_name(char string[]) {
  // TODO: 1. For each character in string
  //   - determine whether it is alphabetic by calling is_aplha function
  bool is = true;
  int i = 0;
  while (true) {
    if (string[i] == '\0') {
      break;
    }
    if (!is_alpha(string[i])) {
      is = false;
      break;
    }
    ++i;
  }
  return is;
}

#ifndef TEST_BUILD

int main() {
  // Limit the size of names to 20 characters + terminating '\0'
  char name[21];
  char surname[21];

  // Let the user specify their name
  printf("Please provide your name: ");
  scanf("%20s", name);

  // Call our new function that checks if the name contains only alphabetic
  // symbols The argument supplied to the function can have a different name
  // than the one specified in the function definition.
  if (!is_name(name)) {
    printf("Provided name contains non-alphabetic characters!\n");
    return 1;
  }

  printf("Please provide your surname: ");
  scanf("%20s", surname);
  if (!is_name(surname)) {
    printf("Provided surname contains non-alphabetic characters!\n");
    return 1;
  }

  printf("Your full name is: %s %s\n", name, surname);
  return 0;
}

#endif