package org.gcube.dataharvest.harvester;

import java.io.IOException;
import java.net.MalformedURLException;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import org.gcube.common.authorization.library.provider.SecurityTokenProvider;
import org.gcube.dataharvest.datamodel.HarvestedData;
import org.gcube.dataharvest.utils.Utils;
import org.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class VreUsersHarvester extends BasicHarvester {
	
	
	private static Logger logger = LoggerFactory.getLogger(VreUsersHarvester.class);

	public VreUsersHarvester(Date start, Date end) throws ParseException {
		super(start, end);
	}

	@Override
	public List<HarvestedData> getData() throws Exception {
		String context = Utils.getCurrentContext();
		try {
			int measure = get();
			HarvestedData harvest = new HarvestedData(HarvestedData.USERS, context, measure);
			logger.debug(harvest.toString());
			ArrayList<HarvestedData> data = new ArrayList<HarvestedData>();
			data.add(harvest);
			return data;
		} catch (Exception e) {
			logger.error("Error Haversting Context Users for context {}", context,  e);
			throw e;
		}
	}

	private int get() throws MalformedURLException, IOException {
		int userNumber = 0;
		// la seguente stringa deve essere letta dinamicamente
		String url = "https://socialnetworking1.d4science.org/social-networking-library-ws/rest/2/users/get-all-usernames?gcube-token=";
		String token = SecurityTokenProvider.instance.get();
		JSONObject jsonObject = new JSONObject(Utils.getJson(url + token));
		Boolean success = (Boolean) jsonObject.get("success");
		if (success == false) {
			String message = "get-all-usernames returned an error. token: " + token;
			logger.error(message);
			throw new IOException(message);
		}
		userNumber = jsonObject.getJSONArray("result").length();
		return userNumber;
	}
	
}