#include <deimos/core/api_registry.h>
#include <deimos/core/log.h>
#include <deimos/core/temp_allocator.h>
#include <deimos/core/status.h>
#include <deimos/vulkan/vulkan.h>

using namespace deimos;

static LogApi* log_api;

[[nodiscard]]
Status CreateInstance(VulkanApi* vk, VkInstance* instance)
{
    VkApplicationInfo application_info{
        .sType              = VK_STRUCTURE_TYPE_APPLICATION_INFO,
        .pNext              = nullptr,
        .pApplicationName   = "Deimos game",
        .applicationVersion = 0,
        .pEngineName        = "Deimos engine",
        .engineVersion      = 0,
        .apiVersion         = VK_API_VERSION_1_3,
    };

    const char* extensions[]{
        "VK_KHR_surface",
        "VK_KHR_win32_surfaceu",
    };

    const char* layers[]{
        "VK_LAYER_KHRONOS_validation",
        "VK_LAYER_LUNARG_monitor",
    };
    
    VkInstanceCreateInfo create_info{
        .sType                   = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO,
        .pNext                   = nullptr,
        .flags                   = 0,
        .pApplicationInfo        = &application_info,
        .enabledLayerCount       = (uint32_t)ArraySize(layers),
        .ppEnabledLayerNames     = layers,
        .enabledExtensionCount   = (uint32_t)ArraySize(extensions),
        .ppEnabledExtensionNames = extensions,
    };

    VkResult res = vk->CreateInstance(&create_info, nullptr, instance);
    if (res != VK_SUCCESS)
    {
        return UnknownError();
    }

    return {};
}

int main(int /* argc */, char* /* argv */[])
{
    auto* api_registry = InitializeGlobalApiRegistry();
    log_api = api_registry->Get<LogApi>();
    log_api->LogInfo("Base APIs registered");

    RegisterVulkanLoaderApi(api_registry);
    auto* vulkan_loader_api = api_registry->Get<VulkanLoaderApi>();
    auto* vk = vulkan_loader_api->LoadEntry();

    VkInstance instance{};
    Status s = CreateInstance(vk, &instance);
    if (!s.ok())
    {
        log_api->LogError("Couldn't create Vulkan instance: $", s);
    }

    log_api->LogInfo("OK");

    return 0;
}