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/**
 * Creative commons Attribution-NonCommercial license.
 *
 * http://creativecommons.org/licenses/by-nc/2.5/au/deed.en_GB
 *
 * NO WARRANTY IS GIVEN OR IMPLIED, USE AT YOUR OWN RISK.
 */
package base.jee.api.cassandra;

import java.io.IOException;

import com.datastax.driver.core.Row;
import com.datastax.driver.core.Session;

import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

import base.KeyValue;
import base.Query;
import base.jee.Constants;
import base.security.User;

import static base.jee.api.cassandra.util.Log.log;

public class GetSettings extends Query {

	private CassandraAPI api;
	private User user;

	public GetSettings(CassandraAPI api, User user) {
		this.api = api;
		this.user = user;
	}

	public GetSettings() {
	}

	@Override
	public Query newWithParameters(Map parameters) {
		return new GetSettings(
				(CassandraAPI)parameters.get("api"),
				(User)parameters.get("user"));
	}

	public List execute() throws IOException {
		List results = new LinkedList<>();
		Session s = api.getCassandraSession();

		if(user != null && !user.hasRole(Constants.SETTING_MANAGE_ROLE)) {
			log(s, "WARN", user, "Permission denied invoking: " + GetSettings.class.getSimpleName() + " " + getJsonParameters());
			throw new IllegalStateException("You do not have permission to lookup settings");
		}

		for(Row r : s.execute("select name, value from setting")) {
			results.add(new KeyValue(r.getString(0), r.getString(1)));
		}

		Collections.sort(results);

		return results;
	}

	@Override
	public String getJsonParameters() {
		return "{" +
				"\"person\":" + (user == null?"null":"\"" + user.getPersonUuid() + "\"") +
				"}";
	}

}