/*
 * 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.irc.IRCClientInfo;
import com.dmdirc.parser.irc.IRCParser;

import java.time.LocalDateTime;

import javax.inject.Inject;

/**
 * Process an Away/Back message.
 */
public class ProcessAway extends IRCProcessor {

    /**
     * Create a new instance of the IRCProcessor Object.
     *
     * @param parser IRCParser That owns this IRCProcessor
     */
    @Inject
    public ProcessAway(final IRCParser parser) {
        super(parser, "301", "305", "306", "AWAY");
    }

    /**
     * Process an Away/Back message.
     *
     * @param sParam Type of line to process ("305", "306" etc)
     * @param token IRCTokenised line to process
     */
    @Override
    public void process(final LocalDateTime time, final String sParam, final String... token) {
        final IRCClientInfo iClient = getClientInfo(token[0]);
        switch (sParam) {
            case "AWAY":
                if (iClient != null) {
                    final AwayState oldState = iClient.getAwayState();

                    final String reason = token.length > 2 ? token[token.length - 1] : "";
                    iClient.setAwayReason(reason);
                    iClient.setAwayState(reason.isEmpty() ? AwayState.HERE : AwayState.AWAY);

                    if (iClient == parser.getLocalClient()) {
                        callAwayState(time, oldState, iClient.getAwayState(), iClient.getAwayReason());
                    }
                }
                break;
            case "301":
                // WHO Response
                if (iClient != null) {
                    iClient.setAwayReason(token[token.length - 1]);
                }
                break;
            default:
                // IRC HERE/BACK response
                final AwayState oldState = parser.getLocalClient().getAwayState();
                parser.getLocalClient().setAwayState("306".equals(sParam) ? AwayState.AWAY : AwayState.HERE);
                callAwayState(time, oldState, parser.getLocalClient().getAwayState(), parser.getLocalClient().getAwayReason());
                break;
        }
    }

    /**
     * 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));
    }

}