/*-
 * ============LICENSE_START=======================================================
 * ONAP-PAP-REST
 * ================================================================================
 * Copyright (C) 2017-2019 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 com.att.research.xacml.api.pap.PDPPolicy;
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;

public class RemoveGroupPolicy {

    // Container from where we are fetching the policies
    private static PDPPolicyContainer policyContainer;

    private StdPDPGroup updatedObject;
    private final StdPDPGroup group;
    private boolean isSaved = false;

    /**
     * Instantiates a new removes the group policy.
     *
     * @param group the group
     */
    public RemoveGroupPolicy(StdPDPGroup group) {

        this.group = group;

    }

    /**
     * Prepare to remove.
     */
    public void prepareToRemove() {
        if (this.group == null) {
            return;
        }
        setRemoveGroupPolicy(new PDPPolicyContainer(group));
    }

    /**
     * Removes the policy.
     *
     * @param policy the policy
     */
    public void removePolicy(PDPPolicy policy) {
        RemoveGroupPolicy.policyContainer.removeItem(policy);
        this.doSave();
        this.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;
    }

    /**
     * Gets the group.
     *
     * @return the group
     */
    public StdPDPGroup getGroup() {
        return group;
    }

}