/*
 * 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.addons.ui_swing.components.statusbar;

import com.dmdirc.addons.ui_swing.EdtHandlerInvocation;
import com.dmdirc.addons.ui_swing.MainFrame;
import com.dmdirc.addons.ui_swing.events.SwingEventBus;
import com.dmdirc.addons.ui_swing.events.SwingWindowSelectedEvent;
import com.dmdirc.events.ServerInviteExpiredEvent;
import com.dmdirc.events.ServerInviteReceivedEvent;
import com.dmdirc.interfaces.Connection;
import com.dmdirc.events.eventbus.EventBus;
import com.dmdirc.interfaces.InviteManager;
import com.dmdirc.addons.ui_swing.components.IconManager;

import java.awt.Window;
import java.awt.event.MouseEvent;
import java.util.List;
import java.util.Optional;

import javax.inject.Inject;
import javax.swing.BorderFactory;
import javax.swing.JLabel;
import javax.swing.JMenuItem;
import javax.swing.JPopupMenu;
import javax.swing.JSeparator;

import net.engio.mbassy.listener.Handler;

/**
 * A status bar component to show invites to the user and enable them to accept or dismiss them.
 */
public class InviteLabel extends StatusbarPopupPanel<JLabel> {

    /** A version number for this class. */
    private static final long serialVersionUID = 1;
    /** Invite popup menu. */
    private final JPopupMenu menu;
    /** Dismiss invites menu item. */
    private final JMenuItem dismiss;
    /** Accept invites menu item. */
    private final JMenuItem accept;
    /** Parent window that will own popup windows. */
    private final Window parentWindow;
    /** The client event bus to use for invite events. */
    private final EventBus eventBus;
    /** The swing event bus to use for selection events. */
    private final SwingEventBus swingEventBus;
    /** Active connection. */
    private Optional<Connection> activeConnection;

    @Inject
    public InviteLabel(final EventBus eventBus, final IconManager iconManager,
            final MainFrame mainFrame, final SwingEventBus swingEventBus) {
        super(new JLabel());

        this.parentWindow = mainFrame;
        this.eventBus = eventBus;
        this.swingEventBus = swingEventBus;
        this.activeConnection = Optional.empty();

        setBorder(BorderFactory.createEtchedBorder());
        label.setIcon(iconManager.getIcon("invite"));

        menu = new JPopupMenu();
        dismiss = new JMenuItem("Dismiss all invites");
        dismiss.addActionListener(e -> activeConnection.map(Connection::getInviteManager)
                .ifPresent(InviteManager::removeInvites));
        accept = new JMenuItem("Accept all invites");
        accept.addActionListener(e -> activeConnection.map(Connection::getInviteManager)
                .ifPresent(InviteManager::acceptInvites));
    }

    /**
     * Initialises the invite label, adding appropriate listeners.
     */
    public void init() {
        swingEventBus.subscribe(this);
        eventBus.subscribe(this);
        update();
    }

    @Override
    protected StatusbarPopupWindow getWindow() {
        return new InvitePopup(this, activeConnection, parentWindow);
    }

    /**
     * Populates the menu.
     */
    private void popuplateMenu() {
        menu.removeAll();

        activeConnection
                .map(Connection::getInviteManager)
                .map(InviteManager::getInvites)
                .ifPresent(invites -> invites.stream()
                        .map(InviteAction::new)
                        .map(JMenuItem::new)
                        .map(menu::add));
        menu.add(new JSeparator());
        menu.add(accept);
        menu.add(dismiss);
    }

    /**
     * Updates the invite label for the currently active server.
     */
    private void update() {
        if (activeConnection
                .map(Connection::getInviteManager)
                .map(InviteManager::getInvites)
                .map(List::isEmpty).orElse(true)) {
            setVisible(false);
            closeDialog();
        } else {
            refreshDialog();
            setVisible(true);
        }
    }

    @Handler(invocation = EdtHandlerInvocation.class)
    public void handleInviteReceived(final ServerInviteReceivedEvent event) {
        update();
    }

    @Handler(invocation = EdtHandlerInvocation.class)
    public void handleInviteExpired(final ServerInviteExpiredEvent event) {
        update();
    }

    @Override
    public void mouseReleased(final MouseEvent e) {
        mouseClicked(e);
        popuplateMenu();
        if (menu.getComponentCount() > 0) {
            menu.show(this, e.getX(), e.getY());
        }
    }

    @Handler(invocation = EdtHandlerInvocation.class)
    public void selectionChanged(final SwingWindowSelectedEvent event) {
        if (event.getWindow().isPresent()) {
            activeConnection = event.getWindow().get().getContainer().getConnection();
        } else {
            activeConnection = Optional.empty();
        }
        update();
    }
}