package eu.eudat.proxy.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.env.Environment;
import org.springframework.stereotype.Service;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.Unmarshaller;

@Service
public class ConfigLoader {

	private ExternalUrls externalUrls;
	
	@Autowired
	private Environment environment;
//	public static void main(String [] args) {
//		ConfigLoader l = new ConfigLoader("file:///home/nikolas/git/OpenAIRE-EUDAT-DMP/dmp-backend/src/main/resources/ExternalUrls.xml");
//	}

	public ConfigLoader() {
	}
	private void setExternalUrls() {
		String fileUrl = this.environment.getProperty("configuration.externalUrls");
		System.out.println("Loaded also config file: " + fileUrl);
			InputStream is = null;
			try {
				JAXBContext jaxbContext = JAXBContext.newInstance(ExternalUrls.class);
				Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
				is = new URL(fileUrl).openStream();
				externalUrls = (ExternalUrls) jaxbUnmarshaller.unmarshal(is);
//			System.out.println(new ObjectMapper().writeValueAsString(externalUrls));
			} catch (Exception ex) {
				//log the error and shutdown the system (that's a critical error)
				ex.printStackTrace();
				System.exit(0);
			} finally {
				try {
					if (is != null) is.close();
				} catch (IOException e) {
					System.out.println("Warning: Could not close a stream after reading from file: " + fileUrl);
				}
			}

	}


	public ExternalUrls getExternalUrls() {
		this.setExternalUrls();
		return externalUrls;
	}
	
	
	
}