#include "list.h"

#include <iostream>

List::List() : first (nullptr), last (nullptr)
{
}

List::~List()
{
    purge ();
}

void List::insertFirst (Data * data)
{
    data->prev = nullptr;
    data->next = first;
    first = data;
    if (last == nullptr)
        last = data;
    else
        data->next->prev = data;
}

void List::insertLast(Data * data)
{
    data->prev = last;
    data->next = nullptr;
    last = data;
    if (first == nullptr)
        first = data;
    else
        data->prev->next = data;
}

void List::insertAfter(Data * old, Data * data)
{
    data->prev = old;
    data->next = old->next;

    if (data->prev == nullptr)
        first = data;
    else
        data->prev->next = data;

    if (data->next == nullptr)
        last = data;
    else
        data->next->prev = data;
}

void List::insertBefore(Data * old, Data * data)
{
    data->next = old;
    data->prev = old->prev;

    if (data->prev == nullptr)
        first = data;
    else
        data->prev->next = data;

    if (data->next == nullptr)
        last = data;
    else
        data->next->prev = data;
}

void List::remove(Data * data)
{
    if (data->prev != nullptr)
        data->prev->next = data->next;
    else
        first = data->next;

    if (data->next != nullptr)
        data->next->prev = data->prev;
    else
        last = data->prev;

    data->prev = nullptr;
    data->next = nullptr;
}

void List::purge()
{
    while (last != nullptr)
    {
        Data * t = last;
        remove (t);
        delete t;
        t = nullptr;
    }
}


void List::printItem (Data * t)
{
    if (t == nullptr)
       cout << "nic" << endl;
    else
       cout << t->name << ", "
            << t->r << ", "
            << t->g << ", "
            << t->b << endl;
}

void List::print()
{
    // #include <iostream>
    cout << "Seznam" << endl;
    Data * t = first;
    while (t != nullptr)
    {
        cout << t->name << ", "
            << t->r << ", "
            << t->g << ", "
            << t->b << endl;
        t = t->next;
    }
    cout << "Konec seznamu" << endl << endl;
}

Data::Data() :
    prev(nullptr),
    name(""),
    r(0),
    g(0),
    b(0),
    next(nullptr)
{
}

Data::Data(string n0, int r0, int g0, int b0) :
    prev(nullptr),
    name(n0),
    r(r0),
    g(g0),
    b(b0),
    next(nullptr)
{
}