#include "Window.h"
#include "WindowManager.h"
#include <functional>

using namespace Seele;

Window::Window(PWindowManager owner, Gfx::OWindow handle)
    : owner(owner)
    , gfxHandle(std::move(handle))
{
    gfxHandle->setResizeCallback([this](uint32 w, uint32 h) {onResize(w, h); });
}

Window::~Window()
{
}

void Window::addView(PView view)
{
    views.add(view);
}

void Window::render() 
{
    gfxHandle->beginFrame();
    for(auto& view : views)
    {
        view->beginUpdate();
        view->update();
        view->commitUpdate();
        view->prepareRender();
        view->render();
    }
    gfxHandle->endFrame();
}

Gfx::PWindow Window::getGfxHandle()
{
    return gfxHandle;
}
    
void Window::setFocused(PView view) 
{
    auto keyFunction = std::bind(&View::keyCallback, view.getHandle(), std::placeholders::_1, std::placeholders::_2, std::placeholders::_3);
    auto mouseMoveFunction = std::bind(&View::mouseMoveCallback, view.getHandle(), std::placeholders::_1, std::placeholders::_2);
    auto mouseButtonFunction = std::bind(&View::mouseButtonCallback, view.getHandle() , std::placeholders::_1, std::placeholders::_2, std::placeholders::_3);
    auto scrollFunction = std::bind(&View::scrollCallback, view.getHandle(), std::placeholders::_1, std::placeholders::_2);
    auto fileFunction = std::bind(&View::fileCallback, view.getHandle(), std::placeholders::_1, std::placeholders::_2);
    gfxHandle->setKeyCallback(keyFunction);
    gfxHandle->setMouseMoveCallback(mouseMoveFunction);
    gfxHandle->setMouseButtonCallback(mouseButtonFunction);
    gfxHandle->setScrollCallback(scrollFunction);
    gfxHandle->setFileCallback(fileFunction);
    gfxHandle->setCloseCallback([this](){
        owner->notifyWindowClosed(this);
    });
}

void Window::onResize(uint32 width, uint32 height)
{
    for (auto& view : views)
    {
        // TODO: some sort of layouting algorithm should do this
        view->applyArea(URect{
            .size = UVector2(width, height),
            .offset = UVector2(0, 0),
            });
    }
}