/*
 * Copyright (c) 2006-2012 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;

import com.dmdirc.parser.common.MyInfo;
import com.dmdirc.parser.interfaces.callbacks.NickInUseListener;

/**
 * Process a NickInUse message.
 * Parser implements handling of this if Pre-001 and no other handler found,
 * adding the NickInUse handler (addNickInUse) after 001 is prefered over before.<br><br>
 * <br>
 * If the first nickname is in use, and a NickInUse message is recieved before 001, we
 * will attempt to use the altnickname instead.<br>
 * If this also fails, we will start prepending _ (or the value of me.cPrepend) to the main nickname.
 */
public class ProcessNickInUse extends IRCProcessor {

    /**
     * Create a new instance of the ProcessNickInUse Object.
     *
     * @param parser IRCParser That owns this object
     * @param manager ProcessingManager that is in charge of this object
     */
    protected ProcessNickInUse(final IRCParser parser, final ProcessingManager manager) {
        super(parser, manager);
    }

    /**
     * Process a NickInUse message.
     * Parser implements handling of this if Pre-001 and no other handler found,
     * adding the NickInUse handler (addNickInUse) after 001 is prefered over before.<br><br>
     * <br>
     * If the first nickname is in use, and a NickInUse message is recieved before 001, we
     * will attempt to use the altnickname instead.<br>
     * If this also fails, we will start prepending _ (or the value of me.cPrepend) to the main nickname.
     *
     * @param sParam Type of line to process ("433")
     * @param token IRCTokenised line to process
     */
    @Override
    public void process(final String sParam, final String[] token) {
        if (!callNickInUse(token[3])) {
            // Manually handle nick in use.
            callDebugInfo(IRCParser.DEBUG_INFO, "No Nick in use Handler.");
            if (!parser.got001) {
                callDebugInfo(IRCParser.DEBUG_INFO, "Using inbuilt handler");
                // If this is before 001 we will try and get a nickname, else we will leave the nick as-is
                final MyInfo myInfo = parser.getMyInfo();
                if (parser.triedAlt) {
                    final String magicAltNick = myInfo.getPrependChar() + myInfo.getNickname();
                    if (parser.getStringConverter().equalsIgnoreCase(parser.thinkNickname, myInfo.getAltNickname()) && !myInfo.getAltNickname().equalsIgnoreCase(magicAltNick)) {
                        parser.thinkNickname = myInfo.getNickname();
                    }
                    parser.getLocalClient().setNickname(myInfo.getPrependChar() + parser.thinkNickname);
                } else {
                    parser.getLocalClient().setNickname(parser.getMyInfo().getAltNickname());
                    parser.triedAlt = true;
                }
            }
        }
    }

    /**
     * Callback to all objects implementing the NickInUse Callback.
     *
     * @param nickname Nickname that was wanted.
     * @see INickInUse
     * @return true if a method was called, false otherwise
     */
    protected boolean callNickInUse(final String nickname) {
        return getCallbackManager().getCallbackType(NickInUseListener.class).call(nickname);
    }

    /**
     * What does this IRCProcessor handle.
     *
     * @return String[] with the names of the tokens we handle.
     */
    @Override
    public String[] handles() {
        return new String[]{"433"};
    }
}
