#include "linkedlist.h"
#include "QuickSort.h"
#include "ReadFile.h"
#include <stdio.h>

/* This is a tester. */

void printMenu();


int main() 
{

  node *alist;
  int option; /* the menu choice */
  char str[64]; /* a string for adding items to the list */
  char filename[64]; /* a string used for the name of the file to read or write to */
  printf("This is an interface to test the linked-list functions that Jon and Sarah wrote.\n\n");
  printMenu();
  scanf ("%d", &option);
  
  /* loop until they want to quit */
  while (option != 1) {

    /* depending on the option they typed, do the proper command */
    switch(option) {
      
    case 2: 
      if (alist == NULL) {
        printf("\nWhat string would you like to put in this new list?  ");
        scanf("%s", &str);
        alist = newList(str);
      }
      else {
        printf("\nThe list has already been created.\n");
      }
      break;
    case 3:
      if (alist != NULL) {
        printf("\nWhat string would you like to add?  ");
        scanf("%s", &str);
        alist = addAfterCurrent(alist, str);
      }
      else {
        printf("\nThe list has not been created.  Enter a string to create a new list:  ");
        scanf("%s", &str);
        alist = newList(str);
      }
      break;
      
    case 4:
      if (alist != NULL) {
        printf("\nWhat string would you like to add?  ");
        scanf("%s", &str);
        alist = addToEnd(alist, str);
      }
      else {
        printf("\nThe list has not been created.  Enter a string to create a new list:  ");
        scanf("%s", &str);
        alist = newList(str);
      }
      break;

    case 5: 
      if (alist != NULL) {
        printf("\nThe current element is: %s\n", getCurrent(alist));
      }
      else {
        printf("\nError, the list has not been created.\n");
      }
      break;

    case 6: 
      if (alist != NULL) {
        /* call a function to print the entire list */
        listPrint(alist);
      }
      else {
        printf("\nError, the list has not been created.\n");
      }
      break;

    case 7: 
      if (alist != NULL) {
        /* Get the next element in the list */
        alist = getNext(alist);
      }
      else {
        printf("\nError, the list has not been created.\n");
      }
      break;

    case 8: 
      if (alist != NULL) {
        /* Get the previous element in the list */
        alist = getPrev(alist);
      }
      else {
        printf("\nError, the list has not been created.\n");
      }
      break;

    case 9: 
      if (alist != NULL) {
        /* Get the first element in the list */
        alist = getFirst(alist);
      }
      else {
        printf("\nError, the list has not been created.\n");
      }
      break;

    case 10: 
      if (alist != NULL) {
        /* Get the last element in the list */
        alist = getLast(alist);
      }
      else {
        printf("\nError, the list has not been created.\n");
      }
      break;

    case 11: 
      if (alist != NULL) {
        /* Ask for a string */
        printf("\nWhat string would you like to look for?  ");
        scanf("%s", &str);
        /* call findElt to search for that string */
        alist = findElt(alist, str);
      }
      else {
        printf("\nError, the list has not been created.\n");
      }
      break;
    case 12:
      if (alist != NULL) {
         /* Ask for a string */
        printf("\nWhat string would you like to look for?  ");
        scanf("%s", &str);
        /* call deleteElt */
        alist = deleteElt(alist, str);
      }
      else {
        printf("\nError, the list has not been created.\n");
      }
        break;
    case 13:
       if (alist != NULL) {
        /* call quicksort with the list */
        alist = quickSort(alist);
      }
      else {
        /* the list is null */
        printf("\nError, the list has not been created.\n");
      }
        break;
    case 14:        
      if (alist != NULL) {
        /* Ask for a filename */
        printf("\nEnter a filename:  ");
        scanf("%s", &filename);
        alist = readFile(filename);
      }
      else {
        /* the list is null */
        printf("\nError, the list has not been created.\n");
      }
        break;
    case 15:        
      if (alist != NULL) {
        /* Ask for a filename */
        printf("\nEnter a filename:  ");
        scanf("%s", &filename);
        alist = writeFile(filename, alist);
      }
      else {
        /* the list is null */
        printf("\nError, the list has not been created.\n");
      }
        break;

    default:
      printf("\nYou didn't enter a valid menu option.  Please try again. \n");
    } /* switch */



    /* Read input again */
    printf("\nEnter another option, or type '0' to print the menu again:  ");
    scanf ("%d", &option);
    if(option == 0) {
      printMenu();
       scanf ("%d", &option);
    }
  } /* while */



  return 1;
}


void printMenu() {
   /* print beginning messages to the user */
  printf("            ***** MENU *****\n\n");
  printf("  1. Quit\n");
  printf("  2. Create a new list\n");
  printf("  3. Add an element after the current one\n");
  printf("  4. Add an element to the end of the list\n");
  printf("  5. Print the current element\n");
  printf("  6. Print the entire list\n");
  printf("  7. Move to the next element\n");
  printf("  8. Move to the previous element\n");
  printf("  9. Move to the beginning of the list\n");
  printf("  10. Move to the end of the list\n");  
  printf("  11. Find a string in the list and get that element\n");
  printf("  12. Delete a string from the list\n");
  printf("  13. Sort the list\n");
  printf("  14. Read the list from a textfile\n");
  printf("  15. Write the list to a textfile\n");

  printf("\nEnter the number of the option you'd like to do:  ");
}