// Copyright 2016 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.

#pragma once

#include <array>
#include <cstddef>
#include <memory>

#include "Common/CommonTypes.h"
#include "VideoBackends/Vulkan/Constants.h"
#include "VideoCommon/RenderBase.h"

struct XFBSourceBase;

namespace Vulkan
{
class BoundingBox;
class SwapChain;
class StagingTexture2D;
class VKFramebuffer;
class VKPipeline;
class VKTexture;

class Renderer : public ::Renderer
{
public:
  Renderer(std::unique_ptr<SwapChain> swap_chain, float backbuffer_scale);
  ~Renderer() override;

  static Renderer* GetInstance() { return static_cast<Renderer*>(g_renderer.get()); }

  bool IsHeadless() const override;

  bool Initialize() override;
  void Shutdown() override;

  std::unique_ptr<AbstractTexture> CreateTexture(const TextureConfig& config) override;
  std::unique_ptr<AbstractStagingTexture>
  CreateStagingTexture(StagingTextureType type, const TextureConfig& config) override;
  std::unique_ptr<AbstractFramebuffer>
  CreateFramebuffer(AbstractTexture* color_attachment, AbstractTexture* depth_attachment) override;

  std::unique_ptr<AbstractShader> CreateShaderFromSource(ShaderStage stage, const char* source,
                                                         size_t length) override;
  std::unique_ptr<AbstractShader> CreateShaderFromBinary(ShaderStage stage, const void* data,
                                                         size_t length) override;
  std::unique_ptr<NativeVertexFormat>
  CreateNativeVertexFormat(const PortableVertexDeclaration& vtx_decl) override;
  std::unique_ptr<AbstractPipeline> CreatePipeline(const AbstractPipelineConfig& config) override;

  SwapChain* GetSwapChain() const { return m_swap_chain.get(); }
  BoundingBox* GetBoundingBox() const { return m_bounding_box.get(); }
  u16 BBoxRead(int index) override;
  void BBoxWrite(int index, u16 value) override;
  void BBoxFlush() override;

  void Flush() override;
  void WaitForGPUIdle() override;
  void OnConfigChanged(u32 bits) override;

  void ClearScreen(const EFBRectangle& rc, bool color_enable, bool alpha_enable, bool z_enable,
                   u32 color, u32 z) override;

  void SetPipeline(const AbstractPipeline* pipeline) override;
  void SetFramebuffer(AbstractFramebuffer* framebuffer) override;
  void SetAndDiscardFramebuffer(AbstractFramebuffer* framebuffer) override;
  void SetAndClearFramebuffer(AbstractFramebuffer* framebuffer, const ClearColor& color_value = {},
                              float depth_value = 0.0f) override;
  void SetScissorRect(const MathUtil::Rectangle<int>& rc) override;
  void SetTexture(u32 index, const AbstractTexture* texture) override;
  void SetSamplerState(u32 index, const SamplerState& state) override;
  void SetComputeImageTexture(AbstractTexture* texture, bool read, bool write) override;
  void UnbindTexture(const AbstractTexture* texture) override;
  void SetViewport(float x, float y, float width, float height, float near_depth,
                   float far_depth) override;
  void Draw(u32 base_vertex, u32 num_vertices) override;
  void DrawIndexed(u32 base_index, u32 num_indices, u32 base_vertex) override;
  void DispatchComputeShader(const AbstractShader* shader, u32 groups_x, u32 groups_y,
                             u32 groups_z) override;
  void BindBackbuffer(const ClearColor& clear_color = {}) override;
  void PresentBackbuffer() override;

  // Completes the current render pass, executes the command buffer, and restores state ready for
  // next render. Use when you want to kick the current buffer to make room for new data.
  void ExecuteCommandBuffer(bool execute_off_thread, bool wait_for_completion = false);

private:
  void CheckForSurfaceChange();
  void CheckForSurfaceResize();

  void ResetSamplerStates();

  void OnSwapChainResized();
  void BindFramebuffer(VKFramebuffer* fb);

  std::unique_ptr<SwapChain> m_swap_chain;
  std::unique_ptr<BoundingBox> m_bounding_box;

  // Keep a copy of sampler states to avoid cache lookups every draw
  std::array<SamplerState, NUM_PIXEL_SHADER_SAMPLERS> m_sampler_states = {};
};
}  // namespace Vulkan