// Copyright 2019 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.

#pragma once

#include <array>
#include <cstddef>
#include <iosfwd>
#include <memory>
#include <type_traits>
#include <unordered_map>
#include <utility>
#include <vector>

#include "common/common_types.h"
#include "common/thread_worker.h"
#include "shader_recompiler/frontend/ir/basic_block.h"
#include "shader_recompiler/frontend/ir/microinstruction.h"
#include "shader_recompiler/frontend/maxwell/control_flow.h"
#include "shader_recompiler/object_pool.h"
#include "shader_recompiler/profile.h"
#include "video_core/engines/maxwell_3d.h"
#include "video_core/renderer_vulkan/fixed_pipeline_state.h"
#include "video_core/renderer_vulkan/vk_buffer_cache.h"
#include "video_core/renderer_vulkan/vk_compute_pipeline.h"
#include "video_core/renderer_vulkan/vk_graphics_pipeline.h"
#include "video_core/renderer_vulkan/vk_texture_cache.h"
#include "video_core/shader_cache.h"
#include "video_core/vulkan_common/vulkan_wrapper.h"

namespace Core {
class System;
}

namespace Vulkan {

using Maxwell = Tegra::Engines::Maxwell3D::Regs;

struct ComputePipelineCacheKey {
    u128 unique_hash;
    u32 shared_memory_size;
    std::array<u32, 3> workgroup_size;

    size_t Hash() const noexcept;

    bool operator==(const ComputePipelineCacheKey& rhs) const noexcept;

    bool operator!=(const ComputePipelineCacheKey& rhs) const noexcept {
        return !operator==(rhs);
    }
};
static_assert(std::has_unique_object_representations_v<ComputePipelineCacheKey>);
static_assert(std::is_trivially_copyable_v<ComputePipelineCacheKey>);
static_assert(std::is_trivially_constructible_v<ComputePipelineCacheKey>);

struct GraphicsPipelineCacheKey {
    std::array<u128, 6> unique_hashes;
    FixedPipelineState state;

    size_t Hash() const noexcept;

    bool operator==(const GraphicsPipelineCacheKey& rhs) const noexcept;

    bool operator!=(const GraphicsPipelineCacheKey& rhs) const noexcept {
        return !operator==(rhs);
    }

    size_t Size() const noexcept {
        return sizeof(unique_hashes) + state.Size();
    }
};
static_assert(std::has_unique_object_representations_v<GraphicsPipelineCacheKey>);
static_assert(std::is_trivially_copyable_v<GraphicsPipelineCacheKey>);
static_assert(std::is_trivially_constructible_v<GraphicsPipelineCacheKey>);

} // namespace Vulkan

namespace std {

template <>
struct hash<Vulkan::ComputePipelineCacheKey> {
    size_t operator()(const Vulkan::ComputePipelineCacheKey& k) const noexcept {
        return k.Hash();
    }
};

template <>
struct hash<Vulkan::GraphicsPipelineCacheKey> {
    size_t operator()(const Vulkan::GraphicsPipelineCacheKey& k) const noexcept {
        return k.Hash();
    }
};

} // namespace std

namespace Vulkan {

class ComputePipeline;
class Device;
class GenericEnvironment;
class RasterizerVulkan;
class RenderPassCache;
class VKDescriptorPool;
class VKScheduler;
class VKUpdateDescriptorQueue;

struct ShaderInfo {
    u128 unique_hash{};
    size_t size_bytes{};
};

struct ShaderPools {
    void ReleaseContents() {
        flow_block.ReleaseContents();
        block.ReleaseContents();
        inst.ReleaseContents();
    }

    Shader::ObjectPool<Shader::IR::Inst> inst;
    Shader::ObjectPool<Shader::IR::Block> block;
    Shader::ObjectPool<Shader::Maxwell::Flow::Block> flow_block;
};

class PipelineCache final : public VideoCommon::ShaderCache<ShaderInfo> {
public:
    explicit PipelineCache(RasterizerVulkan& rasterizer, Tegra::GPU& gpu,
                           Tegra::Engines::Maxwell3D& maxwell3d,
                           Tegra::Engines::KeplerCompute& kepler_compute,
                           Tegra::MemoryManager& gpu_memory, const Device& device,
                           VKScheduler& scheduler, VKDescriptorPool& descriptor_pool,
                           VKUpdateDescriptorQueue& update_descriptor_queue,
                           RenderPassCache& render_pass_cache, BufferCache& buffer_cache,
                           TextureCache& texture_cache);
    ~PipelineCache() override;

    [[nodiscard]] GraphicsPipeline* CurrentGraphicsPipeline();

    [[nodiscard]] ComputePipeline* CurrentComputePipeline();

    void LoadDiskResources(u64 title_id, std::stop_token stop_loading,
                           const VideoCore::DiskResourceLoadCallback& callback);

private:
    bool RefreshStages();

    const ShaderInfo* MakeShaderInfo(GenericEnvironment& env, VAddr cpu_addr);

    std::unique_ptr<GraphicsPipeline> CreateGraphicsPipeline();

    std::unique_ptr<GraphicsPipeline> CreateGraphicsPipeline(
        ShaderPools& pools, const GraphicsPipelineCacheKey& key,
        std::span<Shader::Environment* const> envs, bool build_in_parallel);

    std::unique_ptr<ComputePipeline> CreateComputePipeline(const ComputePipelineCacheKey& key,
                                                           const ShaderInfo* shader);

    std::unique_ptr<ComputePipeline> CreateComputePipeline(ShaderPools& pools,
                                                           const ComputePipelineCacheKey& key,
                                                           Shader::Environment& env,
                                                           bool build_in_parallel);

    Shader::Profile MakeProfile(const GraphicsPipelineCacheKey& key, Shader::Stage stage);

    Tegra::GPU& gpu;
    Tegra::Engines::Maxwell3D& maxwell3d;
    Tegra::Engines::KeplerCompute& kepler_compute;
    Tegra::MemoryManager& gpu_memory;

    const Device& device;
    VKScheduler& scheduler;
    VKDescriptorPool& descriptor_pool;
    VKUpdateDescriptorQueue& update_descriptor_queue;
    RenderPassCache& render_pass_cache;
    BufferCache& buffer_cache;
    TextureCache& texture_cache;

    GraphicsPipelineCacheKey graphics_key{};
    std::array<const ShaderInfo*, 6> shader_infos{};

    std::unordered_map<ComputePipelineCacheKey, std::unique_ptr<ComputePipeline>> compute_cache;
    std::unordered_map<GraphicsPipelineCacheKey, std::unique_ptr<GraphicsPipeline>> graphics_cache;

    ShaderPools main_pools;

    Shader::Profile base_profile;
    std::string pipeline_cache_filename;

    Common::ThreadWorker workers;
    Common::ThreadWorker serialization_thread;
};

} // namespace Vulkan
