package instance

import (
	"github.com/vkngwrapper/core/v2"
	"github.com/vkngwrapper/core/v2/core1_0"
	"github.com/vkngwrapper/extensions/v2/ext_debug_utils"
	"github.com/vkngwrapper/extensions/v2/khr_portability_enumeration"
	"zworld/engine/window"
)

type FVulkanHelp struct{}

func (h *FVulkanHelp) getCreateInstanceExtension(instanceOptions *core1_0.InstanceCreateInfo, loader *core.VulkanLoader, win *window.FSDLWindow) error {
	// Add extensions
	sdlExtensions := win.GetInstance().VulkanGetInstanceExtensions()
	extensions, _, err := loader.AvailableExtensions()
	if err != nil {
		return err
	}

	for _, ext := range sdlExtensions {
		_, hasExt := extensions[ext]
		if !hasExt {
			return nil
		}
		instanceOptions.EnabledExtensionNames = append(instanceOptions.EnabledExtensionNames, ext)
	}

	if enableValidationLayers {
		instanceOptions.EnabledExtensionNames = append(instanceOptions.EnabledExtensionNames, ext_debug_utils.ExtensionName)
	}

	_, enumerationSupported := extensions[khr_portability_enumeration.ExtensionName]
	if enumerationSupported {
		instanceOptions.EnabledExtensionNames = append(instanceOptions.EnabledExtensionNames, khr_portability_enumeration.ExtensionName)
		instanceOptions.Flags |= khr_portability_enumeration.InstanceCreateEnumeratePortability
	}
	return nil
}

func (h *FVulkanHelp) getCreateInstanceLayer(instanceOptions *core1_0.InstanceCreateInfo, loader *core.VulkanLoader, win *window.FSDLWindow) error {
	// Add extensions
	layers, _, err := loader.AvailableLayers()
	if err != nil {
		return err
	}

	if enableValidationLayers {
		for _, layer := range validationLayers {
			_, hasValidation := layers[layer]
			if !hasValidation {
				return nil
			}
			instanceOptions.EnabledLayerNames = append(instanceOptions.EnabledLayerNames, layer)
		}
	}
	return nil
}