/*
 CIS 22C

 Sorted Circular Doubly-Linked List with Sentinel Node

 This program:
- Creates a sorted linked list (student name and gpa) . The list is sorted in ascending order by name.
- Displays the list forwards(A to Z)
- Displays the list backwards(Z to A)

 Requirements: Finish writing the following three functions:
- default constructor
- insertNode()
- displayListBack()

 Written by: Iurii Tatishchev
 Reviewed by: Iurii Tatishchev
 IDE: CLion

 */

#include <iostream>
#include <sstream>
#include "StudentList.h"

using namespace std;

void buildList(StudentList &);

int main()
{
    // Define a StudentList object
    StudentList list;

    buildList(list); // insert data into the list
    cout << "There are " << list.getCount() << " elements in the list." << endl;

    string answer;
    cout << "Insert [Y/N]? ";
    getline(cin, answer);
    if (answer == "Y" || answer == "y")
    {
        Student s;
        cout << "Enter gpa then enter name:" << endl;
        cin >> s.gpa >> s.name;
        list.insertNode(s);
        cout << "There are " << list.getCount() << " elements in the list." << endl;
    }
    cout << endl;
    list.displayListForw();
    /* Write your code here: display the list from Z to A */
    return 0;
}

/* **************************************************
This function builds a sorted linked list with data from the keyboard.
The list is sorted in ascending order by the students' names.
It calls the insertNode() function that inserts the new data at the right location in the linked list.
An input line contains the gpa of a student follow by its name (assume it is a single word name)
To stop reading enter "#"
************************************************** */
void buildList(StudentList &list)
{
   string line;
   getline(cin, line);
   while (line != "#")
   {
      stringstream temp(line); // create a stringstream named temp with data from line
      Student newStu;
      temp >> newStu.gpa;  // read gpa from temp
      temp >> newStu.name; // read name from temp
      list.insertNode(newStu);
      getline(cin, line);
   }

}