#include "renderwindow.h"

#include <QVulkanInstance>
#include <QResizeEvent>

#include "renderer.h"
#include "worldmanager.h"

RendererWindow::RendererWindow(Context& context) : QWindow(), context(context) {
    setSurfaceType(SurfaceType::VulkanSurface);
}

void RendererWindow::exposeEvent(QExposeEvent*) {
    if (isExposed() && !initialized) {
        init();
        render();

        initialized = true;
    }
}

bool RendererWindow::event(QEvent* event) {
    switch(event->type()) {
        case QEvent::UpdateRequest:
            render();
            break;
        case QEvent::PlatformSurface:
        {
            if(static_cast<QPlatformSurfaceEvent*>(event)->surfaceEventType() == QPlatformSurfaceEvent::SurfaceAboutToBeDestroyed)
                context.renderer->destroyRenderTarget(target);
        }
            break;
        default:
            break;
    }

    return QWindow::event(event);
}

void RendererWindow::init() {
    surface = QVulkanInstance::surfaceForWindow(this);

    target = context.renderer->createSurfaceRenderTarget(surface);
}

void RendererWindow::render() {
    const auto width = size().width();
    const auto height = size().height();

    if(target->extent.width != width || target->extent.height != height)
        target = context.renderer->createSurfaceRenderTarget(surface, target);

    RenderExtraInfo extraInfo;
    extraInfo.selectedEntities = context.selectedEntities.data();
    extraInfo.numSelectedEntities = context.selectedEntities.size();

    context.renderer->render(*worldManager.getCurrentWorld(), target, &extraInfo);

    vulkanInstance()->presentQueued(this);
    requestUpdate();
}