/*
 * LinShare is an open source filesharing software, part of the LinPKI software
 * suite, developed by Linagora.
 * 
 * Copyright (C) 2015 LINAGORA
 * 
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option) any
 * later version, provided you comply with the Additional Terms applicable for
 * LinShare software by Linagora pursuant to Section 7 of the GNU Affero General
 * Public License, subsections (b), (c), and (e), pursuant to which you must
 * notably (i) retain the display of the “LinShare™” trademark/logo at the top
 * of the interface window, the display of the “You are using the Open Source
 * and free version of LinShare™, powered by Linagora © 2009–2015. Contribute to
 * Linshare R&D by subscribing to an Enterprise offer!” infobox and in the
 * e-mails sent with the Program, (ii) retain all hypertext links between
 * LinShare and linshare.org, between linagora.com and Linagora, and (iii)
 * refrain from infringing Linagora intellectual property rights over its
 * trademarks and commercial brands. Other Additional Terms apply, see
 * <http://www.linagora.com/licenses/> for more details.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU Affero General Public License and
 * its applicable Additional Terms for LinShare along with this program. If not,
 * see <http://www.gnu.org/licenses/> for the GNU Affero General Public License
 * version 3 and <http://www.linagora.com/licenses/> for the Additional Terms
 * applicable to LinShare software.
 */
package org.linagora.linshare.core.domain.entities;

import org.linagora.linshare.core.domain.constants.Policies;

/**
 * this class is designed to handle the 'enable/disable' status of a particular functionality.
 */
public class Policy implements Cloneable {
	/**
	 * Database persistence identifier
	 */
	private long persistenceId;

	/**
	 * enable/disable the policy
	 */
	private boolean status;

	private Policies policy = Policies.ALLOWED;

	private boolean defaultStatus = false;

	/**
	 * configure if the Policy is system or not, if it should be used by the ihm
	 */
	private boolean system;

	/**
	 * This member is not persisted into the database.
	 * It is only used to compute update right.
	 */
	private Boolean parentAllowUpdate;

	public Policy() {
		super();
	}
	
	public Policy(Policies policy, boolean default_status,boolean system) {
		this(policy,default_status);
		this.system = system;
	}
	public Policy(Policies policy, boolean defaultStatus) {
		super();
		this.defaultStatus = defaultStatus;
		setPolicy(policy);
		system = false;
		status = defaultStatus;
		applyConsistency();
	}
	
	public Policy(Policies policy) {
		super();
		setPolicy(policy);
	}
	
	public Policy(Policy current) {
		super();
		setDefaultStatus(current.getDefaultStatus());
		setStatus(current.getStatus());
		setPolicy(current.getPolicy());
		setSystem(current.isSystem());
	}

	public boolean getStatus() {
		return status;
	}

	public void setStatus(boolean status) {
		this.status = status;
	}

	public Policies getPolicy() {
		return policy;
	}

	public void setPolicy(Policies policy) {
		this.policy = policy;
	}

	public long getId() {
		return persistenceId;
	}

	public void setId(long persistenceId) {
		this.persistenceId = persistenceId;
	}

	public boolean getDefaultStatus() {
		return defaultStatus;
	}

	private void setDefaultStatus(boolean defaultStatus) {
		this.defaultStatus = defaultStatus;
	}

	public Boolean getParentAllowUpdate() {
		return parentAllowUpdate;
	}

	public void setParentAllowUpdate(Boolean parentAllowUpdate) {
		this.parentAllowUpdate = parentAllowUpdate;
	}

	public String toString() {
		return "Policy=" + persistenceId + ":status=" + status + ":policy=" + policy;
	}

	/**
	 * this method returns true if a child can alter this policy 
	 * @return
	 */
	public boolean isMutable() {
		if(!system) {
			if(policy.equals(Policies.ALLOWED)) {
				return true;
			}
		}
		return false;
	}

	public boolean businessEquals(Object obj) {
		Policy p = (Policy)obj;
		if(system == p.isSystem()) {
			if(status == p.getStatus()) {
				if(policy.toInt() == p.getPolicy().toInt()) {
					return true;
				}
			}
		}
		return false;
	}
	
	public Object clone() {
		Policy p = null;
		    try {
		      	p = (Policy) super.clone();
		    } catch(CloneNotSupportedException cnse) {
		      	cnse.printStackTrace(System.err);
		    }
		    p.persistenceId=0;
		    return p;
	}

	public boolean isSystem() {
		return system;
	}

	public void setSystem(boolean system) {
		this.system = system;
	}
	
	
	public void updatePolicyFrom(Policy obj) {
		this.setStatus(obj.getStatus());
		this.setPolicy(obj.getPolicy());
	}
	
	public void applyConsistency() {
		if(policy.toInt() ==  Policies.FORBIDDEN.toInt()) {
			status=false;
		} else if(policy.toInt() ==  Policies.MANDATORY.toInt()) {
			status=true;
		}
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result
				+ (int) (persistenceId ^ (persistenceId >>> 32));
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Policy other = (Policy) obj;
		if (persistenceId != other.persistenceId)
			return false;
		return true;
	}

	/**
	 * Helpers
	 */
	public boolean isForbidden() {
		return this.getPolicy().equals(Policies.FORBIDDEN);
	}

	public boolean isMandatory() {
		return this.getPolicy().equals(Policies.MANDATORY);
	}
}