#include "Base.h"
#include "VerticalLayout.h"

namespace gameplay
{

static VerticalLayout* __instance;

VerticalLayout::VerticalLayout() : _bottomToTop(false)
{
}

VerticalLayout::VerticalLayout(const VerticalLayout& copy)
{
}

VerticalLayout::~VerticalLayout()
{
    __instance = NULL;
}

VerticalLayout* VerticalLayout::create()
{
    if (!__instance)
    {
        __instance = new VerticalLayout();
    }
    else
    {
        __instance->addRef();
    }

    return __instance;
}

void VerticalLayout::setBottomToTop(bool bottomToTop)
{
    _bottomToTop = bottomToTop;
}

Layout::Type VerticalLayout::getType()
{
    return Layout::LAYOUT_VERTICAL;
}

void VerticalLayout::update(const Container* container)
{
    GP_ASSERT(container);

    // Need border, padding.
    Theme::Border border = container->getBorder(container->getState());
    Theme::Padding padding = container->getPadding();

    float yPosition = 0;

    std::vector<Control*> controls = container->getControls();

    unsigned int i, end, iter;
    if (_bottomToTop)
    {
        i = controls.size() - 1;
        end = -1;
        iter = -1;
    }
    else
    {
        i = 0;
        end = controls.size();
        iter = 1;
    }

    while (i != end)
    {
        Control* control = controls.at(i);
        GP_ASSERT(control);
            
        align(control, container);

        const Rectangle& bounds = control->getBounds();
        const Theme::Margin& margin = control->getMargin();

        yPosition += margin.top;

        control->setPosition(0, yPosition);
        control->update(container->getClip(), Vector2::zero());

        yPosition += bounds.height + margin.bottom;

        i += iter;
    }
}

}