/*
 * Copyright (c) 2006-2017 DMDirc Developers
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package com.dmdirc.parser.irc.processors;

import com.dmdirc.parser.common.AwayState;
import com.dmdirc.parser.events.AwayStateEvent;
import com.dmdirc.parser.events.ChannelOtherAwayStateEvent;
import com.dmdirc.parser.events.OtherAwayStateEvent;
import com.dmdirc.parser.interfaces.ChannelClientInfo;
import com.dmdirc.parser.interfaces.ChannelInfo;
import com.dmdirc.parser.interfaces.ClientInfo;
import com.dmdirc.parser.irc.IRCClientInfo;
import com.dmdirc.parser.irc.IRCParser;

import java.time.LocalDateTime;

import javax.inject.Inject;

/**
 * Process a /who reply.
 */
public class ProcessWho extends IRCProcessor {

    /**
     * Create a new instance of the IRCProcessor Object.
     *
     * @param parser IRCParser That owns this IRCProcessor
     */
    @Inject
    public ProcessWho(final IRCParser parser) {
        super(parser, "352");
    }

    /**
     * Process a /who reply.
     *
     * @param sParam Type of line to process ("352")
     * @param token IRCTokenised line to process
     */
    @Override
    public void process(final LocalDateTime time, final String sParam, final String... token) {
        // :blueyonder2.uk.quakenet.org 352 Dataforce #mdbot shane Tobavaj.users.quakenet.org *.quakenet.org Tobavaj G+x :3 Tobavaj - http://shane.dmdirc.com/scriptbot.php
        //              0               1      2        3     4              5                      6           7     8        9
        // :blueyonder2.uk.quakenet.org 352 Dataforce #mdbot ~Dataforce ResNetUser-BrynDinas-147.143.246.102.bangor.ac.uk *.quakenet.org Dataforce H@ :0 Dataforce
        //              0               1      2        3      4                               5                            6              7      8        9
        // :blueyonder2.uk.quakenet.org 352 Dataforce #mdbot shane soren.dataforce.org.uk *.quakenet.org DF|Soren H :3 Unknown
        //              0               1      2        3     4              5                      6       7     8      9
        // :server 352 mynickname channel username address server nick flags :hops info
        //     0    1      2         3     4          5      6      7    8        9

        final IRCClientInfo client = getClientInfo(token[7]);
        if (client != null) {
            // Update ident/host
            client.setUserBits(token[7] + '!' + token[4] + '@' + token[5], false);
            // Update real name
            if (client.getRealname().isEmpty()) {
                final String name = token[9].split(" ", 2)[1];
                client.setRealName(name);
            }
            // Update away state
            final String mode = token[8];
            final AwayState isAway = mode.indexOf('G') == -1 ? AwayState.HERE : AwayState.AWAY;
            if (client.getAwayState() != isAway) {
                final AwayState oldState = client.getAwayState();
                client.setAwayState(isAway);
                if (client == parser.getLocalClient()) {
                    callAwayState(time, oldState, client.getAwayState(), client.getAwayReason());
                } else {
                    callAwayStateOther(time, client, oldState, isAway);

                    for (ChannelInfo iChannel : parser.getChannels()) {
                        final ChannelClientInfo iChannelClient = iChannel.getChannelClient(client);
                        if (iChannelClient != null) {
                            callChannelAwayStateOther(time, iChannel, iChannelClient, oldState, isAway);
                        }
                    }
                }
            }
        }
    }

    /**
     * Callback to all objects implementing the onAwayState Callback.
     *
     * @param oldState Old Away State
     * @param currentState Current Away State
     * @param reason Best guess at away reason
     */
    protected void callAwayState(final LocalDateTime time, final AwayState oldState, final AwayState currentState,
            final String reason) {
        getCallbackManager().publish(
                new AwayStateEvent(parser, time, oldState, currentState, reason));
    }

    /**
     * Callback to all objects implementing the onAwayStateOther Callback.
     *
     * @param client Client this is for
     * @param oldState Old Away State
     * @param state Current Away State
     */
    protected void callAwayStateOther(final LocalDateTime time, final ClientInfo client, final AwayState oldState,
            final AwayState state) {
        getCallbackManager().publish(
                new OtherAwayStateEvent(parser, time, client, oldState, state));
    }

    /**
     * Callback to all objects implementing the onChannelAwayStateOther Callback.
     *
     * @param channel Channel this is for
     * @param channelClient ChannelClient this is for
     * @param oldState Old Away State
     * @param state Current Away State
     */
    protected void callChannelAwayStateOther(final LocalDateTime time, final ChannelInfo channel,
            final ChannelClientInfo channelClient, final AwayState oldState, final AwayState state) {
        getCallbackManager().publish(
                new ChannelOtherAwayStateEvent(parser, time, channel, channelClient,
                        oldState, state));
    }

}