package instance

//#cgo LDFLAGS: -LF:/Coding/GoModule/cgo -lvulkan
import "C"

import (
	"github.com/vkngwrapper/core/v2"
	"github.com/vkngwrapper/core/v2/common"
	"github.com/vkngwrapper/core/v2/core1_0"
	"zworld/engine/window"
)

var (
	engineName = "goworld"
	layers     = []string{
		"VK_LAYER_KHRONOS_validation",
		//"VK_LAYER_LUNARG_api_dump",
	}
)

type T interface {
	EnumeratePhysicalDevices() []core1_0.PhysicalDevice
	Destroy()
	Ptr() core1_0.Instance
}
type FLoaderCreate func() *core.VulkanLoader
type FInstance struct {
	loader *core.VulkanLoader
	ptr    core1_0.Instance
}

func New(appName string, win *window.FSDLWindow, LoaderCreate FLoaderCreate) T {
	loader := LoaderCreate()
	instanceOptions := &core1_0.InstanceCreateInfo{
		APIVersion:         common.APIVersion(common.CreateVersion(1, 1, 0)),
		ApplicationName:    appName,
		ApplicationVersion: common.CreateVersion(0, 1, 0),
		EngineName:         "goworld",
		EngineVersion:      common.CreateVersion(0, 2, 1),
	}
	help.getCreateInstanceExtension(instanceOptions, loader, win)
	handle, _, err := loader.CreateInstance(nil, *instanceOptions)
	if err != nil {
		panic(err)
	}
	return &FInstance{
		ptr: handle,
	}
}

func (i *FInstance) Ptr() core1_0.Instance {
	return i.ptr
}

func (i *FInstance) Destroy() {
	i.ptr.Destroy(nil)
	i.ptr = nil
}

func (i *FInstance) EnumeratePhysicalDevices() []core1_0.PhysicalDevice {
	r, _, err := i.ptr.EnumeratePhysicalDevices()
	if err != nil {
		panic(err)
	}
	return r
}