package uk.co.metricrat.camerabase64;

import android.app.Activity;
import android.content.ActivityNotFoundException;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.provider.MediaStore;
import android.util.Base64;

import com.google.appinventor.components.annotations.SimpleEvent;
import com.google.appinventor.components.annotations.SimpleFunction;
import com.google.appinventor.components.runtime.ActivityResultListener;
import com.google.appinventor.components.runtime.AndroidNonvisibleComponent;
import com.google.appinventor.components.runtime.ComponentContainer;
import com.google.appinventor.components.runtime.EventDispatcher;
import com.google.appinventor.components.runtime.errors.YailRuntimeError;

import java.io.ByteArrayOutputStream;

public class CameraBase64 extends AndroidNonvisibleComponent implements ActivityResultListener {

    final Activity activity;
    private final int requestCapture;

    public CameraBase64(ComponentContainer container) {
        super(container.$form());
        this.activity = container.$context();
        requestCapture = form.registerForActivityResult(this);
    }

    @SimpleFunction(description = "Takes Thumbnail Picture with Camera and returns base64 string")
    public void TakeThumbnailPictureAsBase64() {
        Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        try {
            this.activity.startActivityForResult(takePictureIntent, requestCapture);
        } catch (ActivityNotFoundException e) {
            throw new YailRuntimeError(e.getMessage(), "Cannot start activity");
        }
    }

    @Override
    public void resultReturned(int requestCode, int resultCode, Intent data) {
        if (requestCode == requestCapture && resultCode == Activity.RESULT_OK) {
            Bundle extras = data.getExtras();
            Bitmap imageBitmap = (Bitmap) extras.get("data");
            String encodedString = bitMapToBase64(imageBitmap);
            AfterPictureBase64(encodedString);
        }
    }

    public String bitMapToBase64(Bitmap bitMap) {
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        bitMap.compress(Bitmap.CompressFormat.PNG, 50, byteArrayOutputStream);
        byte[] byteArray = byteArrayOutputStream.toByteArray();
        return Base64.encodeToString(byteArray, Base64.DEFAULT);
    }

    @SimpleEvent(description = "Called after the picture is taken. The text argument `base64Data` is the base64 string of the image")
    public void AfterPictureBase64(String base64Data) {
        EventDispatcher.dispatchEvent(this, "AfterPictureBase64", base64Data);
    }
}