/*
 * Copyright (c) 2006-2010 Chris Smith, Shane Mc Cormack, Gregory Holmes
 *
 * 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.addons.dcc;

import com.dmdirc.Main;
import com.dmdirc.Server;
import com.dmdirc.actions.ActionManager;
import com.dmdirc.addons.dcc.actions.DCCActions;
import com.dmdirc.addons.dcc.kde.KFileChooser;
import com.dmdirc.commandparser.CommandArguments;
import com.dmdirc.commandparser.CommandManager;
import com.dmdirc.commandparser.commands.IntelligentCommand;
import com.dmdirc.commandparser.commands.ServerCommand;
import com.dmdirc.config.IdentityManager;
import com.dmdirc.parser.interfaces.Parser;
import com.dmdirc.ui.input.AdditionalTabTargets;
import com.dmdirc.ui.input.TabCompletionType;
import com.dmdirc.ui.interfaces.InputWindow;

import java.io.File;
import java.util.List;

import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JOptionPane;

/**
 * This command allows starting dcc chats/file transfers
 *
 * @author Shane "Dataforce" Mc Cormack
 */
public final class DCCCommand extends ServerCommand implements IntelligentCommand {

    /** My Plugin */
    private final DCCPlugin myPlugin;

    /**
     * Creates a new instance of DCCCommand.
     *
     * @param plugin The DCC Plugin that this command belongs to
     */
    public DCCCommand(final DCCPlugin plugin) {
        super();
        myPlugin = plugin;
        CommandManager.registerCommand(this);
    }

    /** {@inheritDoc} */
    @Override
    public void execute(final InputWindow origin, final Server server,
                        final boolean isSilent, final CommandArguments args) {
        if (args.getArguments().length > 1) {
            final String type = args.getArguments()[0];
            final String target = args.getArguments()[1];
            final Parser parser = server.getParser();
            final String myNickname = parser.getLocalClient().getNickname();

            if (parser.isValidChannelName(target) || parser.getStringConverter().equalsIgnoreCase(target, myNickname)) {
                final Thread errorThread = new Thread(new Runnable() {

                    /** {@inheritDoc} */
                    @Override
                    public void run() {
                        if (parser.getStringConverter().equalsIgnoreCase(target, myNickname)) {
                            JOptionPane.showMessageDialog(null, "You can't DCC yourself.", "DCC Error", JOptionPane.ERROR_MESSAGE);
                        } else {
                            JOptionPane.showMessageDialog(null, "You can't DCC a channel.", "DCC Error", JOptionPane.ERROR_MESSAGE);
                        }
                    }

                });
                errorThread.start();
                return;
            }
            if (type.equalsIgnoreCase("chat")) {
                final DCCChat chat = new DCCChat();
                if (myPlugin.listen(chat)) {
                    final DCCChatWindow window = new DCCChatWindow(myPlugin, chat, "*Chat: " + target, myNickname, target);

                    parser.sendCTCP(target, "DCC", "CHAT chat " + DCC.ipToLong(myPlugin.getListenIP(parser)) + " " + chat.getPort());

                    ActionManager.processEvent(DCCActions.DCC_CHAT_REQUEST_SENT, null, server, target);

                    sendLine(origin, isSilent, "DCCChatStarting", target, chat.getHost(), chat.getPort());
                    window.getFrame().addLine("DCCChatStarting", target, chat.getHost(), chat.getPort());
                } else {
                    sendLine(origin, isSilent, "DCCChatError", "Unable to start chat with " + target + " - unable to create listen socket");
                }
            } else if (type.equalsIgnoreCase("send")) {
                sendFile(target, origin, server, isSilent, args.getArgumentsAsString(2));
            } else {
                sendLine(origin, isSilent, FORMAT_ERROR, "Unknown DCC Type: '" + type + "'");
            }
        } else {
            sendLine(origin, isSilent, FORMAT_ERROR, "Syntax: dcc <type> <target> [params]");
        }
    }

    /**
     * Ask for the file to send, then start the send.
     *
     * @param target Person this dcc is to.
     * @param origin The InputWindow this command was issued on
     * @param server The server instance that this command is being executed on
     * @param isSilent Whether this command is silenced or not
     * @param filename The file to send
     * @since 0.6.3m1
     */
    public void sendFile(final String target, final InputWindow origin, final Server server, final boolean isSilent, final String filename) {
        // New thread to ask the user what file to send
        final File givenFile = new File(filename);
        final Thread dccThread = new Thread(new Runnable() {

            /** {@inheritDoc} */
            @Override
            public void run() {
                final JFileChooser jc = (givenFile.exists()) ? KFileChooser.getFileChooser(myPlugin, givenFile) : KFileChooser.getFileChooser(myPlugin);
                int result;
                if (!givenFile.exists() || !givenFile.isFile()) {
                    jc.setDialogTitle("Send file to " + target + " - DMDirc ");
                    jc.setFileSelectionMode(JFileChooser.FILES_ONLY);
                    jc.setMultiSelectionEnabled(false);
                    result = jc.showOpenDialog((JFrame) Main.getUI().getMainWindow());
                } else {
                    jc.setSelectedFile(givenFile);
                    result = JFileChooser.APPROVE_OPTION;
                }
                if (result == JFileChooser.APPROVE_OPTION) {
                    if (jc.getSelectedFile().length() == 0) {
                        JOptionPane.showMessageDialog(null, "You can't send empty files over DCC.", "DCC Error", JOptionPane.ERROR_MESSAGE);
                        return;
                    } else if (!jc.getSelectedFile().exists()) {
                        JOptionPane.showMessageDialog(null, "Invalid file specified", "DCC Error", JOptionPane.ERROR_MESSAGE);
                        return;
                    }
                    final Parser parser = server.getParser();
                    DCCSend send = new DCCSend(IdentityManager.getGlobalConfig().getOptionInt(myPlugin.getDomain(), "send.blocksize"));
                    send.setTurbo(IdentityManager.getGlobalConfig().getOptionBool(myPlugin.getDomain(), "send.forceturbo"));
                    send.setType(DCCSend.TransferType.SEND);

                    ActionManager.processEvent(DCCActions.DCC_SEND_REQUEST_SENT, null, server, target, jc.getSelectedFile());

                    sendLine(origin, isSilent, FORMAT_OUTPUT, "Starting DCC Send with: " + target);

                    send.setFileName(jc.getSelectedFile().getAbsolutePath());
                    send.setFileSize(jc.getSelectedFile().length());

                    if (IdentityManager.getGlobalConfig().getOptionBool(myPlugin.getDomain(), "send.reverse")) {
                        new DCCSendWindow(myPlugin, send, "Send: " + target, target, server);
                        parser.sendCTCP(target, "DCC", "SEND \"" + jc.getSelectedFile().getName() + "\" " + DCC.ipToLong(myPlugin.getListenIP(parser)) + " 0 " + send.getFileSize() + " " + send.makeToken() + ((send.isTurbo()) ? " T" : ""));
                    } else {
                        if (myPlugin.listen(send)) {
                            new DCCSendWindow(myPlugin, send, "*Send: " + target, target, server);
                            parser.sendCTCP(target, "DCC", "SEND \"" + jc.getSelectedFile().getName() + "\" " + DCC.ipToLong(myPlugin.getListenIP(parser)) + " " + send.getPort() + " " + send.getFileSize() + ((send.isTurbo()) ? " T" : ""));
                        } else {
                            sendLine(origin, isSilent, "DCCSendError", "Unable to start dcc send with " + target + " - unable to create listen socket");
                        }
                    }
                }
            }

        }, "openFileThread");
        // Start the thread
        dccThread.start();
    }

    /**
     * Returns this command's name.
     *
     * @return The name of this command
     */
    @Override
    public String getName() {
        return "dcc";
    }

    /**
     * Returns whether or not this command should be shown in help messages.
     *
     * @return True iff the command should be shown, false otherwise
     */
    @Override
    public boolean showInHelp() {
        return true;
    }

    /**
     * Returns a string representing the help message for this command.
     *
     * @return the help message for this command
     */
    @Override
    public String getHelp() {
        return "dcc - Allows DCC";
    }

    /**
     * Returns a list of suggestions for the specified argument, given the list
     * of previous arguments.
     * @param arg The argument that is being completed
     * @param previousArgs The contents of the previous arguments, if any
     * @return A list of suggestions for the argument
     */
    @Override
    public AdditionalTabTargets getSuggestions(final int arg, final List<String> previousArgs) {
        final AdditionalTabTargets res = new AdditionalTabTargets();

        if (arg == 0) {
            res.add("SEND");
            res.add("CHAT");
            res.excludeAll();
        } else if (arg == 1) {
            res.exclude(TabCompletionType.COMMAND);
            res.exclude(TabCompletionType.CHANNEL);
        } else {
            res.excludeAll();
        }

        return res;
    }

}