/*
 * WorldEdit, a Minecraft world manipulation toolkit
 * Copyright (C) sk89q <http://www.sk89q.com>
 * Copyright (C) WorldEdit team and contributors
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

package com.sk89q.worldedit.command;

import com.boydti.fawe.Fawe;
import com.boydti.fawe.FaweVersion;
import com.boydti.fawe.config.BBC;
import com.boydti.fawe.config.Settings;
import com.boydti.fawe.object.FawePlayer;
import com.boydti.fawe.util.*;
import com.sk89q.minecraft.util.commands.Command;
import com.sk89q.minecraft.util.commands.CommandContext;
import com.sk89q.minecraft.util.commands.CommandPermissions;
import com.sk89q.worldedit.LocalSession;
import com.sk89q.worldedit.WorldEdit;
import com.sk89q.worldedit.WorldEditException;
import com.sk89q.worldedit.entity.Player;
import com.sk89q.worldedit.event.platform.ConfigurationLoadEvent;
import com.sk89q.worldedit.extension.platform.Actor;
import com.sk89q.worldedit.extension.platform.Capability;
import com.sk89q.worldedit.extension.platform.Platform;
import com.sk89q.worldedit.extension.platform.PlatformManager;
import java.io.IOException;
import java.net.URL;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.*;

@Command(aliases = {"worldedit", "we", "fawe"}, desc = "Updating, informational, debug and help commands")
public class WorldEditCommands {
    private static final DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss z");

    private final WorldEdit we;

    public WorldEditCommands(WorldEdit we) {
        this.we = we;
    }

    @Command(
            aliases = {"version", "ver"},
            usage = "",
            desc = "Get WorldEdit/FAWE version",
            min = 0,
            max = 0
    )
    public void version(Actor actor) throws WorldEditException {
        FaweVersion fVer = Fawe.get().getVersion();
        String fVerStr = fVer == null ? "unknown" : fVer.year + "." + fVer.month + "." + fVer.day + "-" + Integer.toHexString(fVer.hash) + "-" + fVer.build;
        actor.print(BBC.getPrefix() + "FAWE " + fVerStr + " by Empire92");
        if (fVer != null) {
            actor.printDebug("------------------------------------");
            FaweVersion version = Fawe.get().getVersion();
            Date date = new GregorianCalendar(2000 + version.year, version.month - 1, version.day).getTime();
            actor.printDebug(" - DATE: " + date.toLocaleString());
            actor.printDebug(" - COMMIT: " + Integer.toHexString(version.hash));
            actor.printDebug(" - BUILD: #" + version.build);
            actor.printDebug(" - PLATFORM: " + Settings.IMP.PLATFORM);
            Updater updater = Fawe.get().getUpdater();
            if (updater == null) {
                actor.printDebug(" - UPDATES: DISABLED");
            } else if (updater.isOutdated()) {
                actor.printDebug(" - UPDATES: " + updater.getChanges().split("\n").length + " (see /fawe cl)");
            } else {
                actor.printDebug(" - UPDATES: Latest Version");
            }
            actor.printDebug("------------------------------------");
        }
        actor.print(BBC.getPrefix() + "WorldEdit " + WorldEdit.getVersion() + " by sk89q");
        PlatformManager pm = we.getPlatformManager();
        actor.printDebug("------------------------------------");
        actor.printDebug("Platforms:");
        for (Platform platform : pm.getPlatforms()) {
            actor.printDebug(String.format(" - %s (%s)", platform.getPlatformName(), platform.getPlatformVersion()));
        }
        actor.printDebug("Capabilities:");
        for (Capability capability : Capability.values()) {
            Platform platform = pm.queryCapability(capability);
            actor.printDebug(String.format(" - %s: %s", capability.name(), platform != null ? platform.getPlatformName() : "NONE"));
        }
        actor.printDebug("------------------------------------");
        actor.printDebug("Wiki: " + "https://github.com/boy0001/FastAsyncWorldedit/wiki");
    }

    @Command(
            aliases = {"reload"},
            usage = "",
            desc = "Reload configuration",
            min = 0,
            max = 0
    )
    @CommandPermissions("worldedit.reload")
    public void reload(Actor actor) throws WorldEditException {
        we.getServer().reload();
        we.getEventBus().post(new ConfigurationLoadEvent(we.getPlatformManager().queryCapability(Capability.CONFIGURATION).getConfiguration()));
        Fawe.get().setupConfigs();
        actor.print(BBC.getPrefix() + "Reloaded WorldEdit " + we.getVersion() + " and FAWE (" + Fawe.get().getVersion() + ")");
    }

    @Command(
            aliases = {"update"},
            usage = "",
            desc = "Update the plugin",
            min = 0,
            max = 0
    )
    public void update(FawePlayer fp) throws WorldEditException {
        if (Fawe.get().getUpdater().installUpdate(fp)) {
            TaskManager.IMP.sync(() -> {
                fp.executeCommand("restart");
                return null;
            });
            fp.sendMessage(BBC.getPrefix() + "Please restart to finish installing the update");
        } else {
            fp.sendMessage(BBC.getPrefix() + "No update is pending");
        }
    }

    @Command(
            aliases = {"changelog", "cl"},
            usage = "",
            desc = "View the FAWE changelog",
            min = 0,
            max = 0
    )
    @CommandPermissions("worldedit.changelog")
    public void changelog(Actor actor) throws WorldEditException {
        try {
            Updater updater = Fawe.get().getUpdater();
            String changes = updater != null ? updater.getChanges() : null;

            String url = "https://empcraft.com/fawe/cl?" + Integer.toHexString(Fawe.get().getVersion().hash);
            if (changes == null) {
                try (Scanner scanner = new Scanner(new URL(url).openStream(), "UTF-8")) {
                    changes = scanner.useDelimiter("\\A").next();
                }
            }
            changes = changes.replaceAll("#([0-9]+)", "github.com/boy0001/FastAsyncWorldedit/issues/$1");

            String[] split = changes.substring(1).split("[\n](?! )");
            if (changes.length() <= 1) actor.print(BBC.getPrefix() + "No description available");
            else {
                StringBuilder msg = new StringBuilder();
                msg.append(BBC.getPrefix() + split.length + " commits:");
                for (String change : split) {
                    String[] split2 = change.split("\n    ");
                    msg.append("\n&a&l" + split2[0]);
                    if (split2.length != 0) {
                        for (int i = 1; i < split2.length; i++) {
                            msg.append('\n');
                            String[] split3 = split2[i].split("\n");
                            String subChange = "&8 - &7" + StringMan.join(split3, "\n&7   ");
                            msg.append(subChange);
                        }
                    }
                }
                msg.append("\n&7More info: &9&o" + url);
                msg.append("\n&7Discuss: &9&ohttps://discord.gg/ngZCzbU");
                actor.print(BBC.color(msg.toString()));
            }
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    @Command(
            aliases = {"debugpaste"},
            usage = "",
            desc = "Upload latest.log, config.yml and your message.yml to https://incendo.org",
            min = 0,
            max = 0
    )
    @CommandPermissions("worldedit.debugpaste")
    public void debugpaste(Actor actor) throws WorldEditException, IOException {
        BBC.DOWNLOAD_LINK.send(actor, IncendoPaster.debugPaste());
    }

    @Command(
            aliases = {"threads"},
            usage = "",
            desc = "Print all thread stacks",
            min = 0,
            max = 0
    )
    @CommandPermissions("worldedit.threads")
    public void threads(Actor actor) throws WorldEditException {
        Map<Thread, StackTraceElement[]> stacks = Thread.getAllStackTraces();
        for (Map.Entry<Thread, StackTraceElement[]> entry : stacks.entrySet()) {
            Thread thread = entry.getKey();
            actor.printDebug("--------------------------------------------------------------------------------------------");
            actor.printDebug("Thread: " + thread.getName() + " | Id: " + thread.getId() + " | Alive: " + thread.isAlive());
            for (StackTraceElement elem : entry.getValue()) {
                actor.printDebug(elem.toString());
            }
        }
    }

    @Command(
            aliases = {"cui"},
            usage = "",
            desc = "Complete CUI handshake (internal usage)",
            min = 0,
            max = 0
    )
    public void cui(Player player, LocalSession session, CommandContext args) throws WorldEditException {
        session.setCUISupport(true);
        session.dispatchCUISetup(player);
    }

    @Command(
            aliases = {"tz"},
            usage = "[timezone]",
            desc = "Set your timezone for snapshots",
            min = 1,
            max = 1
    )
    public void tz(Player player, LocalSession session, CommandContext args) throws WorldEditException {
        TimeZone tz = TimeZone.getTimeZone(args.getString(0));
        session.setTimezone(tz);
        BBC.TIMEZONE_SET.send(player, tz.getDisplayName());
        BBC.TIMEZONE_DISPLAY.send(player, dateFormat.format(Calendar.getInstance(tz).getTime()));
    }

    @Command(
            aliases = {"help"},
            usage = "[<command>]",
            desc = "Displays help for FAWE commands",
            min = 0,
            max = -1
    )
    public void help(Actor actor, CommandContext args) throws WorldEditException {
        UtilityCommands.help(args, we, actor);
    }

    public static Class<WorldEditCommands> inject() {
        return WorldEditCommands.class;
    }
}