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/*
 * TeleStax, Open Source Cloud Communications
 * Copyright 2011-2016, TeleStax Inc. and individual contributors
 * by the @authors tag.
 *
 * This program is free software: you can redistribute it and/or modify
 * 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.
 *
 * 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
 * along with this program.  If not, see 
 *
 * This file incorporates work covered by the following copyright and
 * permission notice:
 *
 *   JBoss, Home of Professional Open Source
 *   Copyright 2007-2011, Red Hat, Inc. and individual contributors
 *   by the @authors tag. See the copyright.txt in the distribution for a
 *   full listing of individual contributors.
 *
 *   This is free software; you can redistribute it and/or modify it
 *   under the terms of the GNU Lesser General Public License as
 *   published by the Free Software Foundation; either version 2.1 of
 *   the License, or (at your option) any later version.
 *
 *   This software 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
 *   Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public
 *   License along with this software; if not, write to the Free
 *   Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 *   02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.jdiameter.server.impl.app.ro;

import org.jdiameter.api.app.AppAnswerEvent;
import org.jdiameter.api.app.AppEvent;
import org.jdiameter.api.app.AppRequestEvent;
import org.jdiameter.api.app.StateEvent;
import org.jdiameter.api.ro.events.RoCreditControlAnswer;
import org.jdiameter.api.ro.events.RoCreditControlRequest;

/**
 * @author [email protected]
 * @author  Alexandre Mendonca 
 * @author  Bartosz Baranowski 
 */
@SuppressWarnings("all") //3rd party lib
public class Event implements StateEvent {

    public enum Type {
        RECEIVED_EVENT,
        SENT_EVENT_RESPONSE,
        RECEIVED_INITIAL,
        SENT_INITIAL_RESPONSE,
        RECEIVED_UPDATE,
        SENT_UPDATE_RESPONSE,
        RECEIVED_TERMINATE,
        SENT_TERMINATE_RESPONSE,
        // These have no transition, no state resources, timers
        SENT_RAR,
        RECEIVED_RAA;
    }

    Type type;
    AppRequestEvent request;
    AppAnswerEvent answer;

    Event(Type type) {
        this.type = type;
    }

    Event(Type type, AppRequestEvent request, AppAnswerEvent answer) {
        this.type = type;
        this.answer = answer;
        this.request = request;
    }

    Event(boolean isRequest, RoCreditControlRequest request, RoCreditControlAnswer answer) {

        this.answer = answer;
        this.request = request;
        /**
         *          * 8.3.  CC-Request-Type AVP
         *
         *     The CC-Request-Type AVP (AVP Code 416) is of type Enumerated and
         *     contains the reason for sending the credit-control request message.
         *     It MUST be present in all Credit-Control-Request messages.  The
         *     following values are defined for the CC-Request-Type AVP:
         *
         *     INITIAL_REQUEST                 1
         *     UPDATE_REQUEST                  2
         *     TERMINATION_REQUEST             3
         *     EVENT_REQUEST                   4
         * 
         */
        if (isRequest) {
            switch (request.getRequestTypeAVPValue()) {
                case 1:
                    type = Type.RECEIVED_INITIAL;
                    break;
                case 2:
                    type = Type.RECEIVED_UPDATE;
                    break;
                case 3:
                    type = Type.RECEIVED_TERMINATE;
                    break;
                case 4:
                    type = Type.RECEIVED_EVENT;
                    break;
                default:
                    throw new IllegalArgumentException("Invalid value or Request-Type AVP not present in CC Request.");
            }
        } else {
            switch (answer.getRequestTypeAVPValue()) {
                case 1:
                    type = Type.SENT_INITIAL_RESPONSE;
                    break;
                case 2:
                    type = Type.SENT_UPDATE_RESPONSE;
                    break;
                case 3:
                    type = Type.SENT_TERMINATE_RESPONSE;
                    break;
                case 4:
                    type = Type.SENT_EVENT_RESPONSE;
                    break;
                default:
                    throw new IllegalArgumentException("Invalid value or Request-Type AVP not present in CC Answer.");
            }
        }
    }

    @Override
    public  E encodeType(Class eClass) {
        return eClass == Event.Type.class ? (E) type : null;
    }

    @Override
    public Enum getType() {
        return type;
    }

    @Override
    public int compareTo(Object o) {
        return 0;
    }

    @Override
    public Object getData() {
        return this.request != null ? this.request : this.answer;
    }

    @Override
    public void setData(Object data) {
        // data = (AppEvent) o;
        // FIXME: What should we do here?! Is it request or answer?
    }

    public AppEvent getRequest() {
        return request;
    }

    public AppEvent getAnswer() {
        return answer;
    }
}