#include <version.h>

#include "dxvk_instance.h"
#include "dxvk_openvr.h"

#include <algorithm>

namespace dxvk {
  
  DxvkInstance::DxvkInstance() {
    Logger::info(str::format("Game: ", env::getExeName()));
    Logger::info(str::format("DXVK: ", DXVK_VERSION));

    g_vrInstance.initInstanceExtensions();

    m_vkl = new vk::LibraryFn();
    m_vki = new vk::InstanceFn(this->createInstance());

    m_adapters = this->queryAdapters();
    g_vrInstance.initDeviceExtensions(this);
  }
  
  
  DxvkInstance::~DxvkInstance() {
    
  }
  
  
  Rc<DxvkAdapter> DxvkInstance::enumAdapters(uint32_t index) const {
    return index < m_adapters.size()
      ? m_adapters[index]
      : nullptr;
  }
  
  
  VkInstance DxvkInstance::createInstance() {
    // Query available extensions and enable the ones that are needed
    vk::NameSet availableExtensions = vk::NameSet::enumerateInstanceExtensions(*m_vkl);
    
    DxvkInstanceExtensions extensionsToEnable;
    extensionsToEnable.enableExtensions(availableExtensions);
    
    if (!extensionsToEnable.checkSupportStatus())
      throw DxvkError("DxvkInstance: Failed to create instance");
    
    // Generate list of extensions that we're actually going to use
    vk::NameSet enabledExtensionSet = extensionsToEnable.getEnabledExtensionNames();
    enabledExtensionSet.merge(g_vrInstance.getInstanceExtensions());
    
    vk::NameList enabledExtensionList = enabledExtensionSet.getNameList();
    
    Logger::info("Enabled instance extensions:");
    this->logNameList(enabledExtensionList);
    
    VkApplicationInfo appInfo;
    appInfo.sType                 = VK_STRUCTURE_TYPE_APPLICATION_INFO;
    appInfo.pNext                 = nullptr;
    appInfo.pApplicationName      = nullptr;
    appInfo.applicationVersion    = 0;
    appInfo.pEngineName           = "DXVK";
    appInfo.engineVersion         = VK_MAKE_VERSION(0, 0, 1);
    appInfo.apiVersion            = VK_MAKE_VERSION(1, 0, 47);
    
    VkInstanceCreateInfo info;
    info.sType                    = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;
    info.pNext                    = nullptr;
    info.flags                    = 0;
    info.pApplicationInfo         = &appInfo;
    info.enabledLayerCount        = 0;
    info.ppEnabledLayerNames      = nullptr;
    info.enabledExtensionCount    = enabledExtensionList.count();
    info.ppEnabledExtensionNames  = enabledExtensionList.names();
    
    VkInstance result = VK_NULL_HANDLE;
    if (m_vkl->vkCreateInstance(&info, nullptr, &result) != VK_SUCCESS)
      throw DxvkError("DxvkInstance::createInstance: Failed to create Vulkan instance");
    return result;
  }
  
  
  std::vector<Rc<DxvkAdapter>> DxvkInstance::queryAdapters() {
    uint32_t numAdapters = 0;
    if (m_vki->vkEnumeratePhysicalDevices(m_vki->instance(), &numAdapters, nullptr) != VK_SUCCESS)
      throw DxvkError("DxvkInstance::enumAdapters: Failed to enumerate adapters");
    
    std::vector<VkPhysicalDevice> adapters(numAdapters);
    if (m_vki->vkEnumeratePhysicalDevices(m_vki->instance(), &numAdapters, adapters.data()) != VK_SUCCESS)
      throw DxvkError("DxvkInstance::enumAdapters: Failed to enumerate adapters");
    
    std::vector<Rc<DxvkAdapter>> result;
    for (uint32_t i = 0; i < numAdapters; i++)
      result.push_back(new DxvkAdapter(this, adapters[i]));
    
    std::sort(result.begin(), result.end(),
      [this] (const Rc<DxvkAdapter>& a, const Rc<DxvkAdapter>& b) -> bool {
        return a->deviceProperties().deviceType == VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU
            && b->deviceProperties().deviceType != VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU;
      });
    
    return result;
  }
  
  
  void DxvkInstance::logNameList(const vk::NameList& names) {
    for (uint32_t i = 0; i < names.count(); i++)
      Logger::info(str::format("  ", names.name(i)));
  }
  
}