package cl.kgames.capacitorbarcodescanner

import android.app.Application
import android.util.Log
import androidx.camera.lifecycle.ProcessCameraProvider
import androidx.core.content.ContextCompat
import androidx.lifecycle.AndroidViewModel
import androidx.lifecycle.LiveData
import androidx.lifecycle.MutableLiveData
import java.util.concurrent.ExecutionException


class CameraXViewModel(application: Application) : AndroidViewModel(application) {
    private var cameraProviderLiveData: MutableLiveData<ProcessCameraProvider>? = null


    val processCameraProvider: LiveData<ProcessCameraProvider>
        get() {
            if (cameraProviderLiveData == null) {
                cameraProviderLiveData = MutableLiveData()
                val cameraProviderFuture =
                    ProcessCameraProvider.getInstance(getApplication())
                cameraProviderFuture.addListener(
                    Runnable {
                        try {
                            cameraProviderLiveData!!.setValue(cameraProviderFuture.get())
                        } catch (e: ExecutionException) {

                            Log.e(TAG, "Unhandled exception", e)
                        } catch (e: InterruptedException) {
                            Log.e(TAG, "Unhandled exception", e)
                        }
                    },
                    ContextCompat.getMainExecutor(getApplication())
                )
            }
            return cameraProviderLiveData!!
        }

    companion object {
        private const val TAG = "CameraXViewModel"
    }
}