#include"List.h"
#include"Zad2.h"
#define x 3

template<class T>
void print_list(List<T> *p)
{
    unsigned int i = 1;
    cout << endl;
    while (p)
    {
        cout << i << ". " << p->data << endl;
        p = p->next;
        ++i;
    }

}

template<class T>
unsigned int count(List<T> *p)
{
    unsigned int counter = 0;
    while (p)
    {
        ++counter;
        p = p->next;
    }
    return counter;
}

template<class T>
void add_to_list(List<T> *&head, List<T> *&tail, T element)
{
    List<T> *p = new List<T>;
    p->data = element;

    if (head)
    {
        tail->next = p;
        tail = tail->next;
    }
    else head = tail = p;
}

template<class T>
void delete_from_list(List<T> *&head, List<T> *&tail)
{
    cout << "\nKtory element chcesz usunac?\n";
    print_list(head);

    List<T> *p = head;
    unsigned int n, ilosc = count(head);

    cin >> n;
    if (n > ilosc)
        return;
    else
    {
        if (n == 1)
        {
            head = head->next;
            delete p;
        }
        else
        {
            while (n > 2)
            {
                p = p->next;
                --n;
            }
            if (p->next == tail)
            {
                delete tail;
                tail = p;
                p->next = NULL;
            }
            else
            {
                List<T> *cleaner = p->next;
                p->next = p->next->next;
                delete cleaner;
            }
        }
    }
    cout << "\nPo usunieciu:\n";
    print_list(head);
}

void printmenu()
{
    cout << "\n(1)Wyswietl liste";
    cout << "\n(2)Dodaj do listy";
    cout << "\n(3)Usun z listy";
    cout << "\n(4)Zapisz liste do pliku";
    cout << "\n(5)Odczytaj liste z pliku";
    cout << "\n(6)Wyszukaj studenta";
    cout << "\n(0)Powrot\n";
}

template<class T>
void delete_list(List<T> *&head)
{
    List<T> *p;
    while (head)
    {
        p = head;
        head = head->next;
        delete p;
    }
}

template<class T>
void add_from_file(List<T> *&head, List<T> *&tail)
{

}


void save(List<Student> *p)
{
    const char *txt = "St.bin";
    ofstream file1(txt, ios::out | ios::binary);
    int ilosc = count(p);
    Student *tab = new Student[ilosc];

    int i = 0;
    while (p)
    {
        tab[i] = p->data;
        p = p->next;
        ++i;
    }

    file1.write((char*)tab, ilosc*sizeof(Student));
    file1.close();

    delete[] tab;
}

template<class T>
void load(List<T> *&head, List<T> *&tail)
{
    const char *txt = "St.bin";
    ifstream file1(txt, ios::in | ios::binary);
    Student *tab = new Student[sizeof(Student)];

    file1.read((char*)tab, sizeof(Student));
    while (!(file1.eof()))
    {
        add_to_list(head, tail, *tab);
        file1.read((char*)tab, sizeof(Student));
    }

    delete[] tab;
}

void find_id(List<Student> *p)
{
    int id, counter = 0;
    cout << "\nWprowadz indeks: ";
    cin >> id;

    while (p)
    {
        counter++;
        if (p->data.nr_indeksu == id)
        {
            cout << "\nOdnaleziono element. Jest on na pozycji nr " << counter;
            cout << ".\nDane studenta:\n" << p->data;
        }
        p = p->next;
    }
}

void zad3()
{
    List<Student> *head = NULL, *tail = NULL;
    Student s1, s2, s3;
    s1 = { "Sebastian", "Jena", 23041995, 122045 };
    s2 = { "Jan", "Nowak", 01012000, 123456 };
    s3 = { "Ktos", "Ktosik", 30042000, 334234 };
    add_to_list(head, tail, s1);
    add_to_list(head, tail, s2);
    add_to_list(head, tail, s3);

    char podmenu;
    do
    {
        printmenu();
        podmenu = _getch();
        switch (podmenu)
        {

        case '1':
            print_list(head);
            break;
        case '2':
        {
            cout << "Wpisz odpowiednio imie, nazwisko, date urodzenia i indeks,\n i zatwierdzajac wszystko Enterem:\n";
            Student dodaj;
            cin >> dodaj;
            add_to_list(head, tail, dodaj);
        }break;
        case '3':
            delete_from_list(head, tail);
            break;
        case '4':
            save(head);
            break;
        case '5':
            load(head, tail);
            break;
        case '6':
            find_id(head);
            break;
        default:
            break;
        }
    } while (podmenu != '0');
    delete_list(head);
}