#include "resources/render_target.hpp"

#include <algorithm>

namespace sophia {

RenderTarget::RenderTarget(Device& device, vk::Format format, u32 width,
                           u32 height)
    : device{device}, format{format} {
  create(std::max(width, 1u), std::max(height, 1u));
}

RenderTarget::~RenderTarget() { destroy(); }

vk::Extent2D RenderTarget::getExtent() const {
  vk::Extent3D extent = this->image->getExtent();
  return {extent.width, extent.height};
}

void RenderTarget::requestResize(u32 width, u32 height) {
  this->pendingExtent = vk::Extent2D{std::max(width, 1u), std::max(height, 1u)};
}

void RenderTarget::applyPendingResize() {
  if (!this->pendingExtent) {
    return;
  }

  vk::Extent2D extent = *this->pendingExtent;
  this->pendingExtent.reset();
  if (extent == getExtent()) {
    return;
  }

  this->device.waitIdle();

  destroy();
  create(extent.width, extent.height);
}

void RenderTarget::create(u32 width, u32 height) {
  this->image = Image::Builder(this->device)
                    .setExtent(width, height)
                    .setFormat(this->format)
                    .asColorAttachment()
                    .withView()
                    .build();
}

void RenderTarget::destroy() { this->image.reset(); }

}  // namespace sophia