package ndi

import (
	"fmt"
	"github.com/bitfocus/gondi"
	"os"
)

var NDI_LIB_PATH = ""

func discovery() {
	var (
		libndi    = ""
		libndiEnv = os.Getenv("LIBNDI")
	)
	if libndiEnv != "" {
		libndi = libndiEnv
	} else if NDI_LIB_PATH != "" {
		libndi = fmt.Sprintf("%s/lib/libndi.so", NDI_LIB_PATH)
	} else {
		fmt.Println("LIBNDI environment variable is not set")
		return
	}

	fmt.Println("Initializing NDI")
	if err := gondi.InitLibrary(libndi); err != nil {
		fmt.Println("Failed to initialize NDI library:", err)
		return
	}

	version := gondi.GetVersion()
	fmt.Printf("NDI version: %s\n", version)

	findInstance, err := gondi.NewFindInstance(true, "", "")
	if err != nil {
		panic(err)
	}
	defer findInstance.Destroy()

	// Wait for sources to appear
	fmt.Println("Looking for sources...")
	for {
		more := findInstance.WaitForSources(5000)
		if !more {
			break
		}
	}

	// Fetch the sources
	sources := findInstance.GetCurrentSources()

	if len(sources) == 0 {
		fmt.Println("No sources found")
		return
	}

	for _, source := range sources {
		fmt.Printf("Found source: %q: %q\n", source.Name(), source.Address())
	}
}