package com.ts3client.ui;

import com.ts3client.net.ChannelNode;
import com.ts3client.net.ClientEntry;
import com.ts3client.net.Group;
import com.ts3client.net.IconRepository;
import com.ts3client.net.ServerModel;
import com.ts3client.text.BBCode;

import javax.swing.BorderFactory;
import javax.swing.JEditorPane;
import javax.swing.JScrollPane;
import java.io.File;
import java.util.List;

/**
 * Read-only detail view for the currently selected channel or client, mirroring
 * the TeamSpeak 3 info box: channel topic/description, or a client's server and
 * channel groups, platform and version.
 */
public final class InfoPanel extends JScrollPane {

    private final JEditorPane pane = new JEditorPane();

    public InfoPanel() {
        javax.swing.text.html.HTMLEditorKit kit = new javax.swing.text.html.HTMLEditorKit();
        javax.swing.text.html.StyleSheet css = new javax.swing.text.html.StyleSheet();
        css.addStyleSheet(kit.getStyleSheet());
        css.addRule("a { color:" + hex(Theme.CHAT_NAME) + "; text-decoration:none; }");
        // Client references look exactly like a message author's name.
        css.addRule("a." + BBCode.IDENTITY_LINK_CLASS
                + " { color:" + hex(Theme.CHAT_NAME) + "; font-weight:bold; text-decoration:none; }");
        // External links are underlined so they can't be mistaken for an identity.
        css.addRule("a." + BBCode.EXTERNAL_LINK_CLASS
                + " { color:" + hex(Theme.LINK) + "; text-decoration:underline; }");
        kit.setStyleSheet(css);
        pane.setEditorKit(kit);
        pane.setEditable(false);
        pane.setBackground(Theme.CHAT_BG);
        pane.setBorder(BorderFactory.createEmptyBorder(6, 8, 6, 8));
        pane.addHyperlinkListener(e -> {
            if (e.getEventType() == javax.swing.event.HyperlinkEvent.EventType.ACTIVATED) {
                Links.open(e.getDescription(), this);
            }
        });
        setViewportView(pane);
        setBorder(BorderFactory.createLineBorder(new java.awt.Color(0xD0D0D0)));
        clear();
    }

    public void clear() {
        setHtml("<i style='color:#8a8a8a'>Select a channel or client to see details.</i>");
    }

    public void showChannel(ChannelNode ch) {
        StringBuilder sb = new StringBuilder();
        sb.append(heading(esc(ch.name)));
        row(sb, "Type", ch.permanent ? "Permanent" : "Temporary");
        if (ch.maxClients >= 0) row(sb, "Max clients", Integer.toString(ch.maxClients));
        if (ch.hasPassword) row(sb, "Password", "protected");
        if (!ch.topic.isEmpty()) row(sb, "Topic", esc(ch.topic));
        sb.append("<hr>");
        if (ch.description != null && !ch.description.isEmpty()) {
            sb.append("<div>").append(multiline(ch.description)).append("</div>");
        } else if (ch.descriptionLoaded) {
            sb.append("<i style='color:#8a8a8a'>No description.</i>");
        } else {
            sb.append("<i style='color:#8a8a8a'>Loading description…</i>");
        }
        setHtml(sb.toString());
    }

    public void showClient(ClientEntry cl, ServerModel model, IconRepository icons) {
        StringBuilder sb = new StringBuilder();
        sb.append(heading(esc(cl.nickname) + (cl.self ? " <span style='color:#8a8a8a'>(you)</span>" : "")));

        List<Group> serverGroups = model.serverGroupsOf(cl.serverGroupIds);
        if (serverGroups.isEmpty()) {
            List<String> names = model.serverGroupNames(cl.serverGroupIds);
            row(sb, "Server groups", names.isEmpty() ? "—" : esc(String.join(", ", names)));
        } else {
            StringBuilder groups = new StringBuilder();
            for (Group g : serverGroups) {
                if (groups.length() > 0) groups.append(", ");
                groups.append(iconTag(g, icons)).append(esc(g.name));
            }
            row(sb, "Server groups", groups.toString());
        }

        Group channelGroup = model.channelGroup(cl.channelGroupId);
        row(sb, "Channel group", channelGroup != null
                ? iconTag(channelGroup, icons) + esc(channelGroup.name)
                : "#" + cl.channelGroupId);

        if (cl.talkPower != 0) row(sb, "Talk power", Integer.toString(cl.talkPower));
        if (!cl.platform.isEmpty()) row(sb, "Platform", esc(cl.platform));
        if (!cl.version.isEmpty()) row(sb, "Version", esc(cl.version));
        if (cl.away) row(sb, "Status", "Away");
        if (!cl.inputHardware) row(sb, "Microphone", "disabled");
        else if (cl.inputMuted) row(sb, "Microphone", "muted");
        if (!cl.outputHardware) row(sb, "Speakers", "disabled");
        else if (cl.outputMuted) row(sb, "Speakers", "muted");
        if (!cl.uniqueId.isEmpty()) row(sb, "Unique ID", esc(cl.uniqueId));

        if (cl.description != null && !cl.description.isEmpty()) {
            sb.append("<hr><div>").append(multiline(cl.description)).append("</div>");
        }
        setHtml(sb.toString());
    }

    private void setHtml(String body) {
        pane.setText("<html><body style='font-family:sans-serif;font-size:11px;color:#202020'>"
                + body + "</body></html>");
        pane.setCaretPosition(0);
    }

    /**
     * An inline {@code <img>} for a group's icon, or nothing while the icon is missing
     * or still downloading. Swing's HTML renderer only loads images by URL, so the icon
     * is served from the repository's on-disk cache.
     */
    private static String iconTag(Group group, IconRepository icons) {
        if (group.iconId == 0) return "";
        File file = icons.file(group.iconId);
        if (file == null) return "";
        return "<img src='" + file.toURI() + "' width='14' height='14'> ";
    }

    private static String heading(String text) {
        return "<div style='font-weight:bold;font-size:13px;margin-bottom:4px'>" + text + "</div>";
    }

    private static void row(StringBuilder sb, String label, String value) {
        sb.append("<div style='margin:1px 0'><span style='color:#5a6b7b'>")
                .append(label).append(":</span> ").append(value).append("</div>");
    }

    /** Descriptions may carry BBCode markup. */
    private static String multiline(String text) {
        return BBCode.toHtml(text);
    }

    private static String esc(String s) {
        return BBCode.escape(s);
    }

    private static String hex(java.awt.Color c) {
        return String.format("#%06X", c.getRGB() & 0xFFFFFF);
    }
}