/* A test program for the functions provided by strLists.c.
 * Allows the client to test repeatedly.
 * @Author Wanlin Liu
 * Created February 11, 2000
 * Version 1.2 of February 15, 2000
 */
#include "list.h"
main() {
  int i,j;
  char str[100];
  list head = null;
  
  while(1) {
    printf("Enter your choice: \n");
    printf("1: read from a file. \n");
    printf("2: write to a file. \n");
    printf("3: delete a node.\n");
    printf("4: sort the list.\n");
    printf("5: print out the list.\n");
    printf("6: print out a file. \n");
    printf("7: insert a new node after the current node.\n");
    printf("8: print out the current string.\n");
    printf("9: quit. \n");    
    scanf("%d", &i);
    
    switch(i) {
    case 1 : printf("Please enter file name.\n");
      scanf("%s", str);
      printf("The name of the file is %s.\n", str);
      head = listread(str);
      listprint(head);
      break;
    case 2 : printf("Please enter file name. \n");
      scanf("%s", str);
      if(!head)
        printf("There is nothing in the list to write to the file.\n");
      else 
        listwrite(head, str);
      break;
    case 3 : if(head==null)
      printf("List not existent.\n");
    else {      
      printf("Enter your choice for deletion:\n1: Delete all occurences\n2: delete first occurence.\n3: delete nth element.\n");      
      scanf("%d", &i);      
      if(i==3) {
        printf("Enter the position.\n");
        scanf("%d",&j);
        delete_nth_node(head, j);
      }
      else if((i==1) || (i==2)) {
        printf("Enter the string you want to delete.\n");
        scanf("%s", str);
        if(i==1) 
          delete_elements(head, str);
        else if(i==2) 
          delete_element(head, str);        
      }
      else
        printf("Invalid entry.  Mission aborted.\n");
    }
    break;
    case 4 : if(head==null) {
      printf("List not existent.\n");
      break;
    }
    else {
      head = (list)quicksort(head);
      break;
    }
    case 5 : if(head == null)
      printf("The list is empty.\n");
    else
      listprint(head);
    break;
    case 6 : printf("Please enter file name. \n");
      scanf("%s", str);
      printfile(str);
      break;
    case 7 :  printf("Please enter the string you want to insert. \n");
      scanf("%s", str);
      if(head == null) {
        head = initialize();
        insert(head, str);
        printf("Strng %s inserted successfully.\n", str);
      }
      else {             
        insert(head, str);
        printf("Strng %s inserted successfully.\n", str);
      } 
      break;
    case 8 : if (head == null)
      printf("The the list is empty.\n");
    else      
      printcurrent(head);
    break;
    case 9 : free(head);
      exit(0);
    default : printf("Invalid entry, please try again.\n");
      break;
    }
  }
}