/*
 * Eliasz Zurawka
 * Jan 29th 2007
 * Secure Programming Assignment #2
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#define SENTENCE_MAX 3
#define ENTRY_MAX 50

/* The following typedefs are just used to simplify how we refer to the
structure. Just think of typedefs as aliases. The first typedef
replaces the declaration struct dict_entry with dict_entry. The second
makes it simpler to refer to a dict_entry pointer */

typedef struct dict_entry dict_entry;
typedef dict_entry *dict_entryp;
struct dict_entry {
  char keyword[80];
  char sentence[SENTENCE_MAX][80];
} dictionary[ENTRY_MAX];

int entry_count = 0;

/* ********************************************
   FUNCTION NAME: get_definition
   PURPOSE: Uses gets to receive input of a definition from the user
   INPUT: None
   OUTPUT: A dict_entry structure
   AUTHOR: EZ
   *********************************************** */
dict_entry get_definition() {
  fflush(stdin);
  dict_entry *entP = NULL;
  entP = (struct dict_entry *) malloc(sizeof(struct dict_entry));
  
  //gets(entP->keyword);//If this is not here it will a \n from somewhere
  // even though fflush is called above...very odd.
  printf("Enter Keyword: "); fgets(entP->keyword, 80, stdin);
  
  printf("Enter Line 1: "); fgets(entP->sentence[0], 80, stdin);
  printf("Enter Line 2: "); fgets(entP->sentence[1], 80, stdin);
  printf("Enter Line 3: "); fgets(entP->sentence[2], 80, stdin);
  
  return *entP;
}

/* ***********************************************
   FUNCTION NAME: display_entry
   PURPOSE: Prints to stdout the members of the dictionary structure
 INPUT: display_rec - a pointer to a dict_entry structure
 OUTPUT: None
 AUTHOR: EZ
 ************************************************* */
void display_entry(dict_entryp display_rec) {
  printf("Keyword:\t%s", display_rec->keyword);
  printf("\tDef1:\t%s", display_rec->sentence[0]);
  printf("\tDef2:\t%s", display_rec->sentence[1]);
  printf("\tDef3:\t%s", display_rec->sentence[2]);
}

/* ***********************************************
 FUNCTION NAME: list_entries
 PURPOSE: Prints all the dictionary entries currently in the dictionary
 INPUT: None
 OUTPUT: None
 AUTHOR: EZ
 ************************************************* */
void list_entries() {
  int i = 0;
  for(i = 0; i < entry_count; i++) {
    display_entry(&dictionary[i]);
  }
}

/* ***********************************************
 FUNCTION NAME: find_entry
 PURPOSE: Locates an entry in the dictionary array of structures that
 matches the keyword passed in
 INPUT: Keyword - a character string
 OUTPUT: An integer which is the index of the matching entry in the
 array of dictionary structures, -1 if not found
 AUTHOR: EZ
 ************************************************* */
int find_entry(char *keyword) {
  int count= 0;
  while(count <= entry_count 
	&& strcmp(dictionary[count].keyword, keyword) != 0)
    count++;
  if(count == entry_count) {
    return -1;
  }
  return count;
}

/* ***********************************************
 FUNCTION NAME: callFind
 PURPOSE: Present to keep the main method clean. 
	  Initializes the find and displays it.
 INPUT: None
 OUTPUT: None
 AUTHOR: EZ
 ************************************************* */
void callFind() {
  char searchWord[80];
  printf("Enter a keyword to find: ");
  //scanf("%s", &searchWord);
  fgets(searchWord, 80, stdin);
  printf("Searching for %s\n", searchWord);
  int pos = find_entry(searchWord);
  if(pos >= 0) {
    display_entry(&dictionary[pos]);
  } else {
    printf("Could not find item.");
  }
}

/* ***********************************************
 FUNCTION NAME: main for tiny_dict.c
 PURPOSE: Present a menu of the available functions, retrieve the
 response from the user and call the appropriate function
 INPUT: None
 OUTPUT: 0 if error, 1 if safe exit
 AUTHOR: EZ
 ************************************************* */
int main() {
  int done = 0;

  int choice = 0;
  char choiceString[20];

  while (!done)
    {
      int pos = 0;
      printf("<<<< Your Webster >>>>\n");
      printf("1) Enter a definition.\n");
      printf("2) List all entries.\n");
      printf("3) Display an entry.\n");
      printf("4) Exit.\n");
      printf("Choice: ");
      //Needed to change these lines, was giving weird results
      //scanf("%s", choiceString);
      fgets(choiceString, 20, stdin);
      choice = atoi(choiceString);

      fflush(stdin); /* This flushes \n out of the buffer */
      switch (choice) {
      case 1:
	/* get_definition() will be invoked here */
	//printf("Get Def");
	if(entry_count >= 79) {
	  printf("Dictionary Full.\n");
	} else {
	  dict_entry newWord = get_definition();
	  dictionary[entry_count++] = newWord;
	  fflush(stdin);
	}
	break;
      case 2:
	/* list_entries() will be invoked here */
	list_entries();
	break;
      case 3:
        /* display_entry() will be invoked here */
	callFind();
	break;
      case 4:
	done = 1;
	break;
      default:
	printf("\nInvalid choice: try again. \n");
	choice = 0;
      }
    }
}