/*
 * Jitsi, the OpenSource Java VoIP and Instant Messaging client.
 *
 * Copyright @ 2015 Atlassian Pty Ltd
 *
 * 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.
 */
package net.java.sip.communicator.impl.protocol.jabber;

import java.util.*;

import net.java.sip.communicator.service.protocol.*;
import net.java.sip.communicator.service.protocol.event.*;

/**
 * Keeps a list of all calls currently active and maintained by this protocol
 * provider. Offers methods for finding a call by its ID, peer session
 * and others.
 *
 * @author Emil Ivov
 * @author Symphorien Wanko
 * @author Vincent Lucas
 */
public class ActiveCallsRepositoryJabberGTalkImpl
        <T extends AbstractCallJabberGTalkImpl<U>,
        U extends AbstractCallPeerJabberGTalkImpl<T, ?, ?>>
        extends ActiveCallsRepository<T, OperationSetBasicTelephonyJabberImpl>
{
    /**
     * It's where we store all active calls
     *
     * @param opSet the <tt>OperationSetBasicTelphony</tt> instance which has
     * been used to create calls in this repository
     */
    public ActiveCallsRepositoryJabberGTalkImpl(
                                    OperationSetBasicTelephonyJabberImpl opSet)
    {
        super(opSet);
    }

    /**
     * Returns the {@link CallJabberImpl} containing a {@link
     * CallPeerJabberImpl} whose corresponding jingle session has the specified
     * jingle <tt>sid</tt>.
     *
     * @param sid the jingle <tt>sid</tt> we're looking for.
     *
     * @return the {@link CallJabberImpl} containing the peer with the
     * specified <tt>sid</tt> or <tt>null</tt> if we couldn't find one matching
     * it.
     */
    public T findSID(String sid)
    {
        Iterator<T> calls = getActiveCalls();

        while (calls.hasNext())
        {
            T call = calls.next();
            if (call.containsSID(sid))
                return call;
        }

        return null;
    }

    /**
     * Returns the <tt>Call</tt> with ID equal to <tt>callid</tt>.
     *
     * @param callid the ID to search for
     * @return the <tt>Call</tt> with ID equal to <tt>callid</tt>.
     */
    public T findCallId(String callid)
    {
        Iterator<T> calls = getActiveCalls();

        while (calls.hasNext())
        {
            T call = calls.next();
            if (call.getCallID().equals(callid))
                return call;
        }
        return null;
    }

    /**
     * Returns the {@link CallPeerJabberImpl} whose jingle session has the
     * specified jingle <tt>sid</tt>.
     *
     * @param sid the jingle <tt>sid</tt> we're looking for.
     *
     * @return the {@link CallPeerJabberImpl} with the specified <tt>sid</tt>
     * or  <tt>null</tt> if we couldn't find one matching it.
     */
    public U findCallPeer(String sid)
    {
        Iterator<T> calls = getActiveCalls();

        while (calls.hasNext())
        {
            T call = calls.next();
            U peer = call.getPeer(sid);
            if ( peer != null )
                return peer;
        }

        return null;
    }

    /**
     * Returns the {@link CallPeerJabberImpl} whose session-init's ID has
     * the specified IQ <tt>id</tt>.
     *
     * @param id the IQ <tt>id</tt> we're looking for.
     *
     * @return the {@link CallPeerJabberImpl} with the specified <tt>id</tt>
     * or <tt>null</tt> if we couldn't find one matching it.
     */
    public U findCallPeerBySessInitPacketID(String id)
    {
        Iterator<T> calls = getActiveCalls();

        while (calls.hasNext())
        {
            T call = calls.next();
            U peer = call.getPeerBySessInitPacketID(id);
            if ( peer != null )
                return peer;
        }

        return null;
    }

    /**
     * Creates and dispatches a <tt>CallEvent</tt> notifying registered
     * listeners that an event with id <tt>eventID</tt> has occurred on
     * <tt>sourceCall</tt>.
     *
     * @param eventID the ID of the event to dispatch
     * @param sourceCall the call on which the event has occurred
     * @param cause the <tt>CallChangeEvent</tt>, if any, which is the cause
     * that necessitated a new <tt>CallEvent</tt> to be fired
     * @see ActiveCallsRepository#fireCallEvent(int, Call, CallChangeEvent)
     */
    @Override
    protected void fireCallEvent(
            int eventID,
            Call sourceCall,
            CallChangeEvent cause)
    {
        parentOperationSet.fireCallEvent(eventID, sourceCall);
    }
}