package com.ts3client.ui;

import com.ts3client.net.ChannelNode;
import com.ts3client.net.ChannelSettings;

import javax.swing.JMenuItem;
import javax.swing.JPopupMenu;

/**
 * The context menu for a channel, shared by the server tree and channel links
 * in the chat log.
 */
final class ChannelMenu {

    private ChannelMenu() {
    }

    static JPopupMenu build(ChannelNode channel, ServerTreePanel.Actions actions) {
        JPopupMenu menu = new JPopupMenu();
        JMenuItem join = new JMenuItem("Join channel", Icons.of("CHANNEL_SWITCH"));
        join.addActionListener(a -> actions.joinChannel(channel.id));
        menu.add(join);
        menu.addSeparator();
        // Both start out temporary: a channel made from another channel's menu is
        // usually a throwaway one, and a permanent channel is a deliberate choice.
        JMenuItem create = new JMenuItem("Create Channel", Icons.of("CHANNEL_CREATE"));
        create.addActionListener(a -> actions.createChannel(null, ChannelSettings.Type.TEMPORARY));
        menu.add(create);
        JMenuItem createSub = new JMenuItem("Create Sub-Channel", Icons.of("CHANNEL_CREATE_SUB"));
        createSub.addActionListener(a -> actions.createChannel(channel, ChannelSettings.Type.TEMPORARY));
        menu.add(createSub);
        JMenuItem edit = new JMenuItem("Edit Channel", Icons.of("CHANNEL_EDIT"));
        edit.addActionListener(a -> actions.editChannel(channel));
        menu.add(edit);
        menu.addSeparator();
        addSubscriptionItems(menu, channel, actions);
        JMenuItem files = new JMenuItem("Browse files", Icons.of("FILETRANSFER"));
        files.addActionListener(a -> actions.browseFiles(channel));
        menu.add(files);
        return menu;
    }

    /**
     * The subscription entries, offered the way the official client does: the channel
     * itself toggles, and the family entries appear only where they would do something.
     */
    private static void addSubscriptionItems(JPopupMenu menu, ChannelNode channel,
                                             ServerTreePanel.Actions actions) {
        if (channel.subscribed) {
            add(menu, "Unsubscribe from Channel",
                    () -> actions.setChannelSubscribed(channel, false, false),
                    "UNSUBSCRIBE_FROM_CHANNEL");
        } else {
            add(menu, "Subscribe to Channel",
                    () -> actions.setChannelSubscribed(channel, false, true),
                    "SUBSCRIBE_TO_CHANNEL");
        }
        if (!channel.children.isEmpty()) {
            if (!channel.allSubscribed()) {
                add(menu, "Subscribe to Channel Family",
                        () -> actions.setChannelSubscribed(channel, true, true),
                        "SUBSCRIBE_TO_CHANNEL_FAMILY", "SUBSCRIBE_TO_ALL_CHANNELS");
            }
            if (channel.anySubscribed()) {
                add(menu, "Unsubscribe from Channel Family",
                        () -> actions.setChannelSubscribed(channel, true, false),
                        "UNSUBSCRIBE_FROM_CHANNEL_FAMILY", "UNSUBSCRIBE_FROM_ALL_CHANNELS");
            }
        }
        menu.addSeparator();
    }

    /** Adds an item, icon-less when the pack has none of the given keys. */
    private static void add(JPopupMenu menu, String text, Runnable action, String... iconKeys) {
        JMenuItem item = new JMenuItem(text, Icons.ofAny(iconKeys));
        item.addActionListener(a -> action.run());
        menu.add(item);
    }
}