#include "vulkan_util.h"

#include <SDL_vulkan.h>
#include <Util/log.h>
#include <debug.h>
#include <vulkan/vulkan_core.h>

constexpr bool log_file_vulkanutil = true;  // disable it to disable logging

void Graphics::Vulkan::vulkanCreate(Emulator::WindowCtx* ctx) {
    Emulator::VulkanExt ext;
    vulkanGetInstanceExtensions(&ext);

    VkApplicationInfo app_info{};
    app_info.sType = VK_STRUCTURE_TYPE_APPLICATION_INFO;
    app_info.pNext = nullptr;
    app_info.pApplicationName = "shadps4";
    app_info.applicationVersion = 1;
    app_info.pEngineName = "shadps4";
    app_info.engineVersion = 1;
    app_info.apiVersion = VK_API_VERSION_1_2;

    VkInstanceCreateInfo inst_info{};
    inst_info.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;
    inst_info.pNext = nullptr;
    inst_info.flags = 0;
    inst_info.pApplicationInfo = &app_info;
    inst_info.enabledExtensionCount = ext.required_extensions.size();
    inst_info.ppEnabledExtensionNames = ext.required_extensions.data();
    inst_info.enabledLayerCount = 0;
    inst_info.ppEnabledLayerNames = nullptr;

    VkResult result = vkCreateInstance(&inst_info, nullptr, &ctx->m_graphic_ctx.m_instance);
    if (result == VK_ERROR_INCOMPATIBLE_DRIVER) {
        LOG_CRITICAL_IF(log_file_vulkanutil, "Can't find an compatiblie vulkan driver\n");
        std::exit(0);
    } else if (result != VK_SUCCESS) {
        LOG_CRITICAL_IF(log_file_vulkanutil, "Can't create an vulkan instance\n");
        std::exit(0);
    }

    if (SDL_Vulkan_CreateSurface(ctx->m_window, ctx->m_graphic_ctx.m_instance, &ctx->m_surface) == SDL_FALSE) {
        LOG_CRITICAL_IF(log_file_vulkanutil, "Can't create an vulkan surface\n");
        std::exit(0);
    }

    // TODO i am not sure if it's that it is neccesary or if it needs more
    std::vector<const char*> device_extensions = {VK_KHR_SWAPCHAIN_EXTENSION_NAME, VK_EXT_DEPTH_CLIP_ENABLE_EXTENSION_NAME,
                                                  VK_EXT_COLOR_WRITE_ENABLE_EXTENSION_NAME, "VK_KHR_maintenance1"};

    ctx->m_surface_capabilities = new Emulator::VulkanSurfaceCapabilities{};
    Emulator::VulkanQueues queues;

    vulkanFindCompatiblePhysicalDevice(ctx->m_graphic_ctx.m_instance, ctx->m_surface, device_extensions, ctx->m_surface_capabilities,
                                       &ctx->m_graphic_ctx.physical_device, &queues);
}

void Graphics::Vulkan::vulkanGetInstanceExtensions(Emulator::VulkanExt* ext) {
    u32 required_extensions_count = 0;
    u32 available_extensions_count = 0;
    u32 available_layers_count = 0;
    auto result = SDL_Vulkan_GetInstanceExtensions(&required_extensions_count, nullptr);

    ext->required_extensions = std::vector<const char*>(required_extensions_count);

    result = SDL_Vulkan_GetInstanceExtensions(&required_extensions_count, ext->required_extensions.data());

    vkEnumerateInstanceExtensionProperties(nullptr, &available_extensions_count, nullptr);

    ext->available_extensions = std::vector<VkExtensionProperties>(available_extensions_count);

    vkEnumerateInstanceExtensionProperties(nullptr, &available_extensions_count, ext->available_extensions.data());

    vkEnumerateInstanceLayerProperties(&available_layers_count, nullptr);
    ext->available_layers = std::vector<VkLayerProperties>(available_layers_count);
    vkEnumerateInstanceLayerProperties(&available_layers_count, ext->available_layers.data());

    for (const char* ext : ext->required_extensions) {
        LOG_INFO_IF(log_file_vulkanutil, "Vulkan required extension  = {}\n", ext);
    }

    for (const auto& ext : ext->available_extensions) {
        LOG_INFO_IF(log_file_vulkanutil, "Vulkan available extension: {}, version = {}\n", ext.extensionName, ext.specVersion);
    }

    for (const auto& l : ext->available_layers) {
        LOG_INFO_IF(log_file_vulkanutil, "Vulkan available layer: {}, specVersion = {}, implVersion = {}, {}\n", l.layerName, l.specVersion,
                    l.implementationVersion, l.description);
    }
}

void Graphics::Vulkan::vulkanFindCompatiblePhysicalDevice(VkInstance instance, VkSurfaceKHR surface,
                                                          const std::vector<const char*>& device_extensions,
                                                          Emulator::VulkanSurfaceCapabilities* out_capabilities, VkPhysicalDevice* out_device,
                                                          Emulator::VulkanQueues* out_queues) {
    u32 count_devices = 0;
    vkEnumeratePhysicalDevices(instance, &count_devices, nullptr);

    std::vector<VkPhysicalDevice> devices(count_devices);
    vkEnumeratePhysicalDevices(instance, &count_devices, devices.data());

    VkPhysicalDevice found_best_device = nullptr;
    Emulator::VulkanQueues found_best_queues;

    for (const auto& device : devices) {
    }
}