/*-
 * ============LICENSE_START=======================================================
 * ONAP-PAP-REST
 * ================================================================================
 * Copyright (C) 2017 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.policy.pap.xacml.rest.model;

import java.util.Collection;
import java.util.HashSet;
import java.util.Set;

import org.onap.policy.rest.util.PDPPolicyContainer;
import org.onap.policy.xacml.api.pap.OnapPDPGroup;
import org.onap.policy.xacml.std.pap.StdPDPGroup;

import com.att.research.xacml.api.pap.PDPPolicy;

public class RemoveGroupPolicy {

	
	//Container from where we are fetching the policies
	private static PDPPolicyContainer policyContainer;
		
	private RemoveGroupPolicy self = this;
	private StdPDPGroup updatedObject;
	private final StdPDPGroup group;
	private boolean isSaved = false;
	
	public RemoveGroupPolicy(StdPDPGroup group) {
		
		this.group = group;
		
	}
	
	public void prepareToRemove(PDPPolicy policy) {
		
		if (this.group == null) {
			return;
		}
		setRemoveGroupPolicy(new PDPPolicyContainer(group));

		RemoveGroupPolicy.policyContainer.removeItem(policy);
									
		self.doSave();
		
		self.isSaved = true;
		
	}
	
	private static void setRemoveGroupPolicy(PDPPolicyContainer pdpPolicyContainer) {
        RemoveGroupPolicy.policyContainer = pdpPolicyContainer;
    }

    @SuppressWarnings("unchecked")
	protected void doSave() {
		if (this.group == null) {
			return;
		}
		
		StdPDPGroup updatedGroupObject = new StdPDPGroup(
				group.getId(), 
				group.isDefaultGroup(), 
				group.getName(), 
				group.getDescription(), 
				null);
		
		// replace the original set of Policies with the set from the container (possibly modified by the user)
		Set<PDPPolicy> changedPolicies = new HashSet<>();
		changedPolicies.addAll((Collection<PDPPolicy>) RemoveGroupPolicy.policyContainer.getItemIds());
		updatedGroupObject.setPolicies(changedPolicies);
		updatedGroupObject.setOnapPdps(this.group.getOnapPdps());
		
		// replace the original set of PIP Configs with the set from the container
		updatedGroupObject.setPipConfigs(this.group.getPipConfigs());
		
		// copy those things that the user cannot change from the original to the new object
		updatedGroupObject.setStatus(this.group.getStatus());
		
		this.updatedObject = updatedGroupObject;			
	}
	
	public boolean isRemoved() {
		return this.isSaved;
	}
		
	public OnapPDPGroup getUpdatedObject() {
		return this.updatedObject;
	}

}