#pragma once

#if defined(_WIN32) || defined(__linux__)

#include "renderer_interface.h"
#include <vector>

// Forward declarations para Vulkan
struct VkInstance_T;
struct VkPhysicalDevice_T;
struct VkDevice_T;
struct VkQueue_T;
struct VkSwapchainKHR_T;
struct VkRenderPass_T;
struct VkPipelineLayout_T;
struct VkPipeline_T;
struct VkCommandPool_T;
struct VkCommandBuffer_T;
struct VkBuffer_T;
struct VkDeviceMemory_T;
struct VkImage_T;
struct VkImageView_T;
struct VkFramebuffer_T;
struct VkSemaphore_T;
struct VkFence_T;
struct VkDescriptorSetLayout_T;
struct VkDescriptorPool_T;
struct VkDescriptorSet_T;

typedef VkInstance_T* VkInstance;
typedef VkPhysicalDevice_T* VkPhysicalDevice;
typedef VkDevice_T* VkDevice;
typedef VkQueue_T* VkQueue;
typedef VkSwapchainKHR_T* VkSwapchainKHR;
typedef VkRenderPass_T* VkRenderPass;
typedef VkPipelineLayout_T* VkPipelineLayout;
typedef VkPipeline_T* VkPipeline;
typedef VkCommandPool_T* VkCommandPool;
typedef VkCommandBuffer_T* VkCommandBuffer;
typedef VkBuffer_T* VkBuffer;
typedef VkDeviceMemory_T* VkDeviceMemory;
typedef VkImage_T* VkImage;
typedef VkImageView_T* VkImageView;
typedef VkFramebuffer_T* VkFramebuffer;
typedef VkSemaphore_T* VkSemaphore;
typedef VkFence_T* VkFence;
typedef VkDescriptorSetLayout_T* VkDescriptorSetLayout;
typedef VkDescriptorPool_T* VkDescriptorPool;
typedef VkDescriptorSet_T* VkDescriptorSet;

struct SDL_Window;

namespace vibe4 {

// Implementación usando Vulkan para Windows/Linux
class VulkanRenderer : public RendererInterface {
public:
    VulkanRenderer();
    ~VulkanRenderer() override;

    // Implementación de la interfaz
    bool initialize(SDL_Window* window, int width, int height) override;
    void shutdown() override;

    bool beginFrame() override;
    void endFrame() override;
    void present() override;

    void renderGradientBackground(
        float top_r, float top_g, float top_b,
        float bottom_r, float bottom_g, float bottom_b
    ) override;

    void renderSpriteBatch(
        const std::vector<SpriteData>& sprites,
        void* texture_data
    ) override;

    void setCRTParams(const CRTParams& params) override;
    void enableCRT(bool enable) override;

    BackendType getBackendType() const override { return BackendType::VULKAN; }
    const char* getBackendName() const override { return "Vulkan"; }

    void setVSync(bool enable) override;
    void resize(int width, int height) override;

private:
    // Core Vulkan objects
    VkInstance instance_ = nullptr;
    VkPhysicalDevice physical_device_ = nullptr;
    VkDevice device_ = nullptr;
    VkQueue graphics_queue_ = nullptr;
    VkQueue present_queue_ = nullptr;

    // Swapchain
    VkSwapchainKHR swapchain_ = nullptr;
    std::vector<VkImage> swapchain_images_;
    std::vector<VkImageView> swapchain_image_views_;
    std::vector<VkFramebuffer> swapchain_framebuffers_;

    // Render pass y pipelines
    VkRenderPass render_pass_ = nullptr;
    VkPipelineLayout sprite_pipeline_layout_ = nullptr;
    VkPipeline sprite_pipeline_ = nullptr;
    VkPipelineLayout gradient_pipeline_layout_ = nullptr;
    VkPipeline gradient_pipeline_ = nullptr;

    // Command buffers
    VkCommandPool command_pool_ = nullptr;
    std::vector<VkCommandBuffer> command_buffers_;

    // Synchronization
    std::vector<VkSemaphore> image_available_semaphores_;
    std::vector<VkSemaphore> render_finished_semaphores_;
    std::vector<VkFence> in_flight_fences_;

    // Buffers
    VkBuffer vertex_buffer_ = nullptr;
    VkDeviceMemory vertex_buffer_memory_ = nullptr;
    VkBuffer index_buffer_ = nullptr;
    VkDeviceMemory index_buffer_memory_ = nullptr;
    VkBuffer uniform_buffer_ = nullptr;
    VkDeviceMemory uniform_buffer_memory_ = nullptr;

    // Descriptors
    VkDescriptorSetLayout descriptor_set_layout_ = nullptr;
    VkDescriptorPool descriptor_pool_ = nullptr;
    VkDescriptorSet descriptor_set_ = nullptr;

    // Frame data
    std::vector<SpriteVertex> current_vertices_;
    std::vector<uint16_t> current_indices_;
    uint32_t current_frame_ = 0;
    uint32_t current_image_index_ = 0;

    // Configuración
    const int MAX_FRAMES_IN_FLIGHT = 2;

    // Estructuras uniformes
    struct SpriteUniforms {
        float mvp_matrix[16];
        float screen_size[2];
    };

    struct CRTUniforms {
        float scanline_intensity;
        float curvature_x;
        float curvature_y;
        float bloom_factor;
        float mask_brightness;
        float screen_size[2];
        int enable_scanlines;
        int enable_curvature;
        int enable_bloom;
    };

    // Métodos privados
    bool createInstance();
    bool selectPhysicalDevice();
    bool createLogicalDevice();
    bool createSwapchain();
    bool createRenderPass();
    bool createPipelines();
    bool createFramebuffers();
    bool createCommandPool();
    bool createCommandBuffers();
    bool createSyncObjects();
    bool createBuffers();
    bool createDescriptors();

    void cleanupSwapchain();
    void recreateSwapchain();

    bool findQueueFamilies();
    bool isDeviceSuitable(VkPhysicalDevice device);
    uint32_t findMemoryType(uint32_t type_filter, uint32_t properties);

    void updateUniforms();
    void setupProjectionMatrix(float* matrix);
};

} // namespace vibe4

#endif // _WIN32 || __linux__