import { loadPackageDefinition, credentials } from '@grpc/grpc-js';
import { loadSync } from '@grpc/proto-loader';

let PROTO_PATH = '/opt/android-sdk-linux/emulator/lib/emulator_controller.proto';
let packageDefinition = loadSync(
    PROTO_PATH,
    {keepCase: true,
     longs: String,
     enums: String,
     defaults: true,
     oneofs: true
    });

let emu_control = loadPackageDefinition(packageDefinition).android.emulation.control;

export async function get_screenshot() {
	let target = 'localhost:8888';
	let emu_controller = new emu_control.EmulatorController(target,
                                       credentials.createInsecure());
	let promise = new Promise((resolve, reject) => {
		emu_controller.getScreenshot({}, function(err, response) {
			if (err === null) {
				resolve (response.image);
			} else {
				reject (err);
			}
		});
	});
	return promise;
}