#ifndef EMULATOR_INCLUDE_EMULATOR_GRAPHICS_GRAPHICCONTEXT_H_
#define EMULATOR_INCLUDE_EMULATOR_GRAPHICS_GRAPHICCONTEXT_H_

#include "common/abi.h"
#include "common/common.h"
#include "common/threads.h"
#include "graphics/host_gpu/vulkanCommon.h" // IWYU pragma: export
#include "graphics/host_gpu/vulkanInstance.h"

#include <array>
#include <memory>
#include <mutex>
#include <vector>
#include <vk_mem_alloc.h>

namespace Libs::Graphics {

class CommandBuffer;
struct VulkanBuffer;
struct VulkanImage;
struct VulkanMemory;

struct VulkanSwapchain {
	~VulkanSwapchain();

	vk::SwapchainKHR                 swapchain        = nullptr;
	vk::Format                       swapchain_format = vk::Format::eUndefined;
	vk::Extent2D                     swapchain_extent = {};
	std::unique_ptr<vk::Image[]>     swapchain_images;
	std::unique_ptr<vk::ImageView[]> swapchain_image_views;
	uint32_t                         swapchain_images_count = 0;
	std::unique_ptr<vk::Semaphore[]> image_acquired_semaphores;
	std::unique_ptr<vk::Semaphore[]> render_complete_semaphores;
	uint32_t                         current_index = 0;
	uint32_t                         present_frame = 0;
};

struct VulkanCommandPool {
	Common::Mutex                        mutex;
	vk::CommandPool                      pool = nullptr;
	std::unique_ptr<vk::CommandBuffer[]> buffers;
	std::unique_ptr<vk::Fence[]>         fences;
	std::unique_ptr<vk::Semaphore[]>     semaphores;
	std::unique_ptr<bool[]>              busy;
	uint32_t                             buffers_count = 0;
};

struct GraphicContext: public VulkanInstance {
	[[nodiscard]] bool CreateAllocator();
	void               DestroyAllocator();
	void               LogMemoryBudget() const;
	void               CreateBuffer(uint64_t size, VulkanBuffer& buffer);
	void               DeleteBuffer(VulkanBuffer& buffer);
	[[nodiscard]] bool CreateImage(const vk::ImageCreateInfo& info, VulkanImage& image);
	void               DeleteImage(VulkanImage& image);
	void               MapMemory(VulkanMemory& memory, void*& data);
	void               UnmapMemory(VulkanMemory& memory);
	void               AppendHardwareRayTracingDeviceExtensions(
	    const std::vector<vk::ExtensionProperties>& available_extensions,
	    std::vector<const char*>&                   device_extensions);
	void LoadHardwareRayTracingFunctions() const;

	uint32_t                              screen_width  = 0;
	uint32_t                              screen_height = 0;
	std::array<Common::Mutex, QUEUES_NUM> queue_mutexes;
};

struct VulkanMemory {
	vk::MemoryRequirements  requirements       = {};
	vk::MemoryPropertyFlags property           = {};
	vk::MemoryPropertyFlags preferred_property = {};
	vk::DeviceMemory        memory             = nullptr;
	VmaAllocation           allocation         = nullptr;
	VmaAllocationInfo       allocation_info    = {};
	vk::DeviceSize          offset             = 0;
	uint32_t                type               = 0;
	uint64_t                unique_id          = 0;
};

enum class VulkanImageType {
	Unknown,
	VideoOut,
	DepthStencil,
	Texture,
	StorageTexture,
	RenderTexture
};

struct ImageViewInfo {
	vk::Format           format      = vk::Format::eUndefined;
	vk::ImageViewType    type        = vk::ImageViewType::e2D;
	vk::ImageAspectFlags aspect      = {};
	uint32_t             base_level  = 0;
	uint32_t             level_count = 0;
	uint32_t             base_layer  = 0;
	uint32_t             layer_count = 1;
	uint32_t             swizzle     = 0;
	vk::ImageUsageFlags  usage       = vk::ImageUsageFlagBits::eSampled;

	bool operator==(const ImageViewInfo&) const = default;
};

struct CachedImageView {
	ImageViewInfo info;
	vk::ImageView view = nullptr;
};

struct ImageViewCache {
	std::mutex                   mutex;
	std::vector<CachedImageView> views;

	ImageViewCache() = default;
	KYTY_CLASS_NO_COPY(ImageViewCache);
};

struct VulkanImage {
	static constexpr int VIEW_MAX           = 4;
	static constexpr int VIEW_DEFAULT       = 0;
	static constexpr int VIEW_DEFAULT_ARRAY = 1;
	static constexpr int VIEW_STORAGE       = 2;
	static constexpr int VIEW_STORAGE_ARRAY = 3;

	explicit VulkanImage(VulkanImageType type): type(type) {}
	KYTY_CLASS_NO_COPY(VulkanImage);

	VulkanImageType        type                 = VulkanImageType::Unknown;
	vk::Format             format               = vk::Format::eUndefined;
	vk::Extent2D           extent               = {};
	uint32_t               guest_pitch          = 0;
	uint32_t               layers               = 1;
	uint32_t               mip_levels           = 1;
	uint32_t               samples              = 1;
	vk::Image              image                = nullptr;
	vk::ImageView          image_view[VIEW_MAX] = {};
	vk::ImageLayout        layout               = vk::ImageLayout::eUndefined;
	Graphics::VulkanMemory memory;
	ImageViewCache         view_cache;
};

struct VideoOutVulkanImage: public VulkanImage {
	VideoOutVulkanImage(): VulkanImage(VulkanImageType::VideoOut) {}
};

struct DepthStencilVulkanImage: public VulkanImage {
	DepthStencilVulkanImage(): VulkanImage(VulkanImageType::DepthStencil) {}
	bool compressed                    = false;
	bool initial_depth_clear_pending   = false;
	bool initial_stencil_clear_pending = false;
};

struct GpuTextureVulkanImage: public VulkanImage {
	explicit GpuTextureVulkanImage(VulkanImageType type): VulkanImage(type) {}
};

struct TextureVulkanImage: public GpuTextureVulkanImage {
	TextureVulkanImage(): GpuTextureVulkanImage(VulkanImageType::Texture) {}
};

struct StorageTextureVulkanImage: public GpuTextureVulkanImage {
	StorageTextureVulkanImage(): GpuTextureVulkanImage(VulkanImageType::StorageTexture) {}
};

struct RenderTextureVulkanImage: public VulkanImage {
	RenderTextureVulkanImage(): VulkanImage(VulkanImageType::RenderTexture) {}
	bool initial_clear_pending = false;
};

struct VulkanBuffer {
	vk::Buffer           buffer = nullptr;
	VulkanMemory         memory;
	vk::BufferUsageFlags usage       = {};
	uint64_t             buffer_size = 0;
};

struct StorageVulkanBuffer: public VulkanBuffer {};

} // namespace Libs::Graphics

#endif /* EMULATOR_INCLUDE_EMULATOR_GRAPHICS_GRAPHICCONTEXT_H_ */