/**
 * ============LICENSE_START====================================================
 * org.onap.aaf
 * ===========================================================================
 * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
 * ===========================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ============LICENSE_END====================================================
 *
 */
package org.onap.aaf.auth.batch.approvalsets;

import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.GregorianCalendar;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import org.onap.aaf.auth.dao.cass.ApprovalDAO;
import org.onap.aaf.auth.dao.cass.FutureDAO;
import org.onap.aaf.auth.env.AuthzTrans;
import org.onap.aaf.auth.layer.Result;
import org.onap.aaf.cadi.CadiException;
import org.onap.aaf.misc.env.util.Chrono;

public class ApprovalSet {
	private DataView dataview;
	protected FutureDAO.Data fdd;
	protected List<ApprovalDAO.Data> ladd;
	
	public ApprovalSet(final GregorianCalendar start, final String target, final DataView dv) {
		dataview = dv;
		fdd = new FutureDAO.Data();
		fdd.id = Chrono.dateToUUID(System.currentTimeMillis());
		fdd.target = target;
		fdd.start = start.getTime();
		ladd = new ArrayList<>();
	}
	
	protected void setConstruct(final ByteBuffer bytes) {
		fdd.construct = bytes;
	}

	protected void setMemo(final String memo) {
		fdd.memo = memo;
	}
	
	protected void setExpires(final GregorianCalendar expires) {
		fdd.expires = expires.getTime();
	}
	
	public Result<Void> write(AuthzTrans trans) {
		StringBuilder errs = null;
		if(ladd == null || ladd.isEmpty()) {
			errs = new StringBuilder("No Approvers for ");
			errs .append(fdd.memo);
		} else {
			Result<FutureDAO.Data> rf = dataview.insert(trans, fdd);
			if(rf.notOK()) {
				errs = new StringBuilder();
				errs.append(rf.errorString());
			} else {
				for(ApprovalDAO.Data add : ladd) {
					Result<ApprovalDAO.Data> af = dataview.insert(trans, add);
					if(af.notOK()) {
						if(errs==null) {
							errs = new StringBuilder();
						} else {
							errs.append('\n');
						}
						errs.append(af.errorString());
					}
				}
			}
		}
		return errs==null?Result.ok():Result.err(Result.ERR_Backend,errs.toString());
	}

	public boolean hasApprovals() {
		return !ladd.isEmpty();
	}
	
	public Set<String> approvers() {
		Set<String> rv = new HashSet<>();
		for(ApprovalDAO.Data app : ladd) {
			rv.add(app.approver);
		}
		return rv;
	}
}