#pragma once

#include <memory>
#include <optional>
#include <sophia/types.hpp>
#include <vulkan/vulkan.hpp>

#include "device.hpp"
#include "image.hpp"

namespace sophia {

/**
 * A place rendering can go. Currently always backed by an offscreen color
 * image.
 *
 * Owned by the ResourceRegistry and addressed through a RenderTargetHandle.
 */
class RenderTarget {
 public:
  RenderTarget(Device& device, vk::Format format, u32 width, u32 height);
  ~RenderTarget();

  RenderTarget(const RenderTarget&) = delete;
  RenderTarget& operator=(const RenderTarget&) = delete;

  Image& getImage() const { return *this->image; }

  vk::Extent2D getExtent() const;

  void requestResize(u32 width, u32 height);

  /**
   * Applies a pending resize. Waits for the GPU, so it must run before any of
   * the frame's work (or any UI reference to the image) is recorded.
   */
  void applyPendingResize();

 private:
  void create(u32 width, u32 height);
  void destroy();

  Device& device;
  vk::Format format;

  std::unique_ptr<Image> image;

  std::optional<vk::Extent2D> pendingExtent;
};

}  // namespace sophia