/*
 * BoxLayout.cpp
 *
 *  Created on: 16 maj 2019
 *      Author: robert
 */

#include "BoxLayout.hpp"
#include <log/log.hpp>

#include <Label.hpp>
#include "Alignment.hpp"

namespace gui {

    BoxLayout::BoxLayout() : BoxLayout(nullptr, 0, 0, 0, 0)
    {
    }

    BoxLayout::BoxLayout(Item *parent, const uint32_t &x, const uint32_t &y, const uint32_t &w, const uint32_t &h) : Rect(parent, x, y, w, h)
    {
        inputCallback = [this](Item &item, const InputEvent &inputEvent) -> bool {
            // handle input on kid
            if (focusItem && focusItem->onInput(inputEvent))
            {
                return true;
            }
            else if (handleNavigation(inputEvent))
            {
                return true;
            }
            else if (borderCallback && borderCallback(inputEvent))
            {
                return true;
            }
            // let item logic rule it
            return false;
        };
    }

    bool BoxLayout::onFocus(bool state)
    {
        if (state)
            this->setVisible(state);
        else
            this->setFocusItem(nullptr);
        this->setNavigation();
        if (this->focusChangedCallback)
        {
            this->focusChangedCallback(*this);
        }
        return true;
    }

void BoxLayout::resizeItems() {
}

void BoxLayout::setPosition( const short& x, const short& y ) {
	Rect::setPosition( x, y );
}
void BoxLayout::setSize( const short& w, const short& h ) {
	Rect::setSize( w, h );

	resizeItems();
}
bool BoxLayout::addWidget( Item* item ) {
	bool ret = Rect::addWidget( item );

	resizeItems();

	return ret;
}
bool BoxLayout::removeWidget( Item* item ) {
	bool ret = Rect::removeWidget( item );

	resizeItems();

	return ret;
}
std::list<DrawCommand*> BoxLayout::buildDrawList() {
    auto el = Rect::buildDrawList();
    return el;
}

void BoxLayout::setVisible(bool value, bool previous)
{
    visible = value; // maybe use parent setVisible(...)? would be better but which one?
    if (value == true)
    {
        resizeItems();   // move items in box in proper places
        setNavigation(); // set navigation through kids -> TODO handle out of last/first to parent
        if (children.size())
        { // set first visible kid as focused item - TODO should check for actionItems too...
            /// this if back / front is crappy :|
            if (previous)
            {
                for (auto el = children.rbegin(); el != children.rend(); ++el)
                {
                    if ((*el)->visible && (*el)->activeItem)
                    {
                        setFocusItem(*el);
                        break;
                    }
                }
            }
            else
            {
                for (auto &el : children)
                {
                    if (el->visible && el->activeItem)
                    {
                        setFocusItem(el);
                        break;
                    }
                }
            }
        }
    }
}

void BoxLayout::setVisible(bool value)
{
    setVisible(value, false);
}

template <Axis axis> void BoxLayout::resizeItems()
{
    // TODO rethink resize based on: maxSize, drawArea, alignment etc
    Rect::updateDrawArea();
}

template <Axis axis> bool BoxLayout::addWidget(Item *item)
{
    if (size<axis>(this) - sizeUsed<axis>(this) >= inAxisMax<axis>(item))
    {
        if (!reverse_order)
        {
            item->widgetArea.pos(axis) = children.size() ? children.back()->offset(axis) : 0;
        }
        else
        {
            item->widgetArea.pos(axis) = this->widgetArea.size(axis) - sizeUsed<axis>(this) - item->widgetArea.size(axis);
        }
        Rect::addWidget(item);
        resizeItems<axis>();
        return true;
    }
    return false;
}

std::list<Item *>::iterator BoxLayout::nextNavigationItem(std::list<Item *>::iterator from)
{
    return std::find_if(from, this->children.end(), [](auto &el) -> bool {
        if (el->visible && el->activeItem)
        {
            return true;
        }
        return false;
    });
}

void BoxLayout::setNavigation()
{
    auto previous = nextNavigationItem(children.begin()), next = children.end();
    int i = 0;
    while ((previous != children.end()) && ((next = nextNavigationItem(std::next(previous))) != std::end(children)))
    {
        (*previous)->setNavigationItem(reverse_order ? NavigationDirection::UP : NavigationDirection::DOWN, *next);
        (*next)->setNavigationItem(reverse_order ? NavigationDirection::DOWN : NavigationDirection::UP, *previous);
        previous = next;
    }
}

HBox::HBox() : BoxLayout() {
	type = ItemType::HBOX;
}
HBox::HBox( Item* parent, const uint32_t& x, const uint32_t& y, const uint32_t& w, const uint32_t& h) :
	BoxLayout( parent, x, y, w, h ) {
	type = ItemType::HBOX;
}

void HBox::resizeItems() {
    BoxLayout::resizeItems<Axis::X>();
}

bool HBox::addWidget(Item *item)
{
    return BoxLayout::addWidget<Axis::X>(item);
}

VBox::VBox() : BoxLayout() {
	type = ItemType::VBOX;
}
VBox::VBox( Item* parent, const uint32_t& x, const uint32_t& y, const uint32_t& w, const uint32_t& h) :
	BoxLayout( parent, x, y, w, h ) {
	type = ItemType::VBOX;
}

void VBox::resizeItems() {
    BoxLayout::resizeItems<Axis::Y>();
}

bool VBox::addWidget(Item *item)
{
    return BoxLayout::addWidget<Axis::Y>(item);
}

} /* namespace gui */