package py.com.personal.bc.recargacontrafactura.model;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.message.BasicNameValuePair;
import org.keycloak.OAuth2Constants;
import org.keycloak.adapters.HttpClientBuilder;
import org.keycloak.constants.ServiceUrlConstants;
import org.keycloak.representations.AccessTokenResponse;
import org.keycloak.util.JsonSerialization;
import org.keycloak.util.KeycloakUriBuilder;

public class TokenKeycloak {

	private static final String URI_AUTH = "http://crm7des-jb1.sis.personal.net.py:8380/auth";
	private static final String USERNAME = "billing_user";
	private static final String PASSWORD = "123";
	private static final String GRANT_TYPE = "password";
	private static final String CLIENT_ID = "nucleo";
	private static final String REALM = "nucleo";

	public static String getToken() throws Exception {

		HttpClient client = new HttpClientBuilder().disableTrustManager().build();

		HttpPost post = new HttpPost(
		KeycloakUriBuilder.fromUri(URI_AUTH)
		.path(ServiceUrlConstants.TOKEN_PATH).build(REALM));
		List<NameValuePair> formparams = new ArrayList <NameValuePair>();
		formparams.add(new BasicNameValuePair(OAuth2Constants.GRANT_TYPE, GRANT_TYPE));

		formparams.add(new BasicNameValuePair("username", USERNAME));
		formparams.add(new BasicNameValuePair("password", PASSWORD));

		formparams.add(new BasicNameValuePair(OAuth2Constants.CLIENT_ID, CLIENT_ID));

		UrlEncodedFormEntity form = new UrlEncodedFormEntity(formparams, "UTF-8");
		post.setEntity(form);

		HttpResponse response = client.execute(post);

		BufferedReader in= new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
		String inputText= "", inputLine;
		while( (inputLine= in.readLine()) != null){
			inputText+= inputLine;
			}

		AccessTokenResponse tokenResponse = JsonSerialization.readValue(inputText, AccessTokenResponse.class);
		String token= tokenResponse.getTokenType() + " " + tokenResponse.getToken();
		return token;
	}

}