/*
 * 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.util.call;

import java.beans.*;

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

/**
 * <tt>CallPeerAdapter</tt> implements common <tt>CallPeer</tt> related
 * listeners in order to facilitate the task of implementing
 * <tt>CallPeerRenderer</tt>.
 *
 * @author Yana Stamcheva
 * @author Lyubomir Marinov
 */
public class CallPeerAdapter
    extends net.java.sip.communicator.service.protocol.event.CallPeerAdapter
    implements CallPeerSecurityListener,
               PropertyChangeListener
{
    /**
     * The <tt>CallPeer</tt> which is depicted by {@link #renderer}.
     */
    private final CallPeer peer;

    /**
     * The <tt>CallPeerRenderer</tt> which is facilitated by this instance.
     */
    private final CallPeerRenderer renderer;

    /**
     * Initializes a new <tt>CallPeerAdapter</tt> instance which is to listen to
     * a specific <tt>CallPeer</tt> on behalf of a specific
     * <tt>CallPeerRenderer</tt>. The new instance adds itself to the specified
     * <tt>CallPeer</tt> as a listener for each of the implemented listener
     * types.
     *
     * @param peer the <tt>CallPeer</tt> which the new instance is to listen to
     * on behalf of the specified <tt>renderer</tt>
     * @param renderer the <tt>CallPeerRenderer</tt> which is to be facilitated
     * by the new instance
     */
    public CallPeerAdapter(CallPeer peer, CallPeerRenderer renderer)
    {
        this.peer = peer;
        this.renderer = renderer;

        this.peer.addCallPeerListener(this);
        this.peer.addCallPeerSecurityListener(this);
        this.peer.addPropertyChangeListener(this);
    }

    /**
     * Removes the listeners implemented by this instance from the associated
     * <tt>CallPeer</tt> and prepares it for garbage collection.
     */
    public void dispose()
    {
        peer.removeCallPeerListener(this);
        peer.removeCallPeerSecurityListener(this);
        peer.removePropertyChangeListener(this);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void peerDisplayNameChanged(CallPeerChangeEvent ev)
    {
        if (peer.equals(ev.getSourceCallPeer()))
            renderer.setPeerName((String) ev.getNewValue());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void peerImageChanged(CallPeerChangeEvent ev)
    {
        if (peer.equals(ev.getSourceCallPeer()))
            renderer.setPeerImage((byte[]) ev.getNewValue());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void peerStateChanged(CallPeerChangeEvent ev)
    {
        CallPeer sourcePeer = ev.getSourceCallPeer();

        if (!sourcePeer.equals(peer))
            return;

        CallPeerState newState = (CallPeerState) ev.getNewValue();
        CallPeerState oldState = (CallPeerState) ev.getOldValue();

        String newStateString = sourcePeer.getState().getLocalizedStateString();

        if (newState == CallPeerState.CONNECTED)
        {
            if (!CallPeerState.isOnHold(oldState))
            {
                if (!renderer.getCallRenderer().isCallTimerStarted())
                    renderer.getCallRenderer().startCallTimer();
            }
            else
            {
                renderer.setOnHold(false);
                renderer.getCallRenderer().updateHoldButtonState();
            }
        }
        else if (newState == CallPeerState.DISCONNECTED)
        {
            // The call peer should be already removed from the call
            // see CallPeerRemoved
        }
        else if (newState == CallPeerState.FAILED)
        {
            // The call peer should be already removed from the call
            // see CallPeerRemoved
        }
        else if (CallPeerState.isOnHold(newState))
        {
            renderer.setOnHold(true);
            renderer.getCallRenderer().updateHoldButtonState();
        }

        renderer.setPeerState(oldState, newState, newStateString);

        String reasonString = ev.getReasonString();
        if (reasonString != null)
            renderer.setErrorReason(reasonString);
    }

    /**
     * {@inheritDoc}
     */
    public void propertyChange(PropertyChangeEvent ev)
    {
        String propertyName = ev.getPropertyName();

        if (propertyName.equals(CallPeer.MUTE_PROPERTY_NAME))
        {
            boolean mute = (Boolean) ev.getNewValue();

            renderer.setMute(mute);
        }
    }

    /**
     * {@inheritDoc}
     *
     * <tt>CallPeerAdapter</tt> does nothing.
     */
    public void securityMessageRecieved(CallPeerSecurityMessageEvent ev)
    {
    }

    /**
     * {@inheritDoc}
     */
    public void securityNegotiationStarted(
            CallPeerSecurityNegotiationStartedEvent ev)
    {
        if (peer.equals(ev.getSource()))
            renderer.securityNegotiationStarted(ev);
    }

    /**
     * {@inheritDoc}
     */
    public void securityOff(CallPeerSecurityOffEvent ev)
    {
        if (peer.equals(ev.getSource()))
            renderer.securityOff(ev);
    }

    /**
     * {@inheritDoc}
     */
    public void securityOn(CallPeerSecurityOnEvent ev)
    {
        if (peer.equals(ev.getSource()))
            renderer.securityOn(ev);
    }

    /**
     * {@inheritDoc}
     */
    public void securityTimeout(CallPeerSecurityTimeoutEvent ev)
    {
        if (peer.equals(ev.getSource()))
            renderer.securityTimeout(ev);
    }
}