#include "../SDLHelpers.h"

#include <vector>

using namespace std;

#include <SDL3/SDL.h>
#include <SDL3_image/SDL_image.h>
#include <SDL3_ttf/SDL_ttf.h>

#include "Item.h"
#include "Scrollbar.h"
#include "Listbox.h"
#include "Frame.h"

#include "DlgDropDownList.h"

DlgDropDownList::DlgDropDownList(DropDownList *ddl, SDL_Rect pos, bool add_scrollbar) : Dialog() {
    this->ddl = ddl;
    this->pos = pos;
    setDefaultPos(false);

    background = SDL_CreateSurface(pos.w, pos.h, SDL_GetPixelFormatForMasks(32, 0x000000ff, 0x0000ff00, 0x00ff0000, 0xff000000));
    memset((int *) background->pixels, 0xFFFFFFFF, pos.w * pos.h * 4);
    surface = SDL_CreateSurface(background->w, background->h, SDL_GetPixelFormatForMasks(32, 0x000000ff, 0x0000ff00, 0x00ff0000, 0xff000000));

    int listbox_width = pos.w;
    if (add_scrollbar)
        listbox_width -= 18;
    Item *listbox = new Listbox(ddl->getList(), ddl->getListboxItemSize(), getRect(0, 0, listbox_width, ddl->getListboxHeight()));
    ((Listbox *) listbox)->setValueChangedFunc(&listboxValueChangedCallback, (void *)this);

    Item *item = new Frame(getRect(0, 0, listbox_width, pos.h));
    ((Frame *)item)->addItem(listbox);
    addItem(item);

    if (add_scrollbar) {
        item = new Scrollbar(0, ddl->getListboxHeight() - pos.h, 0, getRect(pos.w - 18, 0, 18, pos.h));
        ((Scrollbar *) item)->setValueChangedFunc(&scrollbarValueChangedCallback, (void *)this);
        addItem(item);
    }

    setExit(false);
}

DlgDropDownList::~DlgDropDownList() {
    deleteSurfaceAndBackground();
    deleteItems();
}

void DlgDropDownList::listboxValueChangedCallback(void *p) {
    ((DlgDropDownList *)p)->listboxValueChanged();
}

void DlgDropDownList::listboxValueChanged() {
    int selected = ((Listbox *)((Frame *) items[0])->getItem(0))->getSelected();
    ddl->setSelected(selected);
    setExit(true);
}

void DlgDropDownList::scrollbarValueChangedCallback(void *p) {
    ((DlgDropDownList *)p)->scrollbarValueChanged();
}

void DlgDropDownList::scrollbarValueChanged() {
    int value = ((Scrollbar *) items[1])->getValue();
    SDL_Rect *pos = ((Frame *) items[0])->getItem(0)->getPos();
    pos->y = 0 - value;
}