@Command(
      aliases = {"/set"},
      usage = "<block>",
      desc = "Set all the blocks inside the selection to a block",
      min = 1,
      max = 1)
  @CommandPermissions("worldedit.region.set")
  @Logging(REGION)
  public static void set(
      CommandContext args,
      WorldEdit we,
      LocalSession session,
      LocalPlayer player,
      EditSession editSession)
      throws WorldEditException {

    Pattern pattern = we.getBlockPattern(player, args.getString(0));

    int affected;

    if (pattern instanceof SingleBlockPattern) {
      affected =
          editSession.setBlocks(
              session.getSelection(player.getWorld()), ((SingleBlockPattern) pattern).getBlock());
    } else {
      affected = editSession.setBlocks(session.getSelection(player.getWorld()), pattern);
    }

    player.print(affected + " block(s) have been changed.");
  }
  @Command(
      aliases = {"/faces", "/outline"},
      usage = "<block>",
      desc = "Build the walls, ceiling, and floor of a selection",
      min = 1,
      max = 1)
  @CommandPermissions("worldedit.region.faces")
  @Logging(REGION)
  public static void faces(
      CommandContext args,
      WorldEdit we,
      LocalSession session,
      LocalPlayer player,
      EditSession editSession)
      throws WorldEditException {

    Pattern pattern = we.getBlockPattern(player, args.getString(0));
    int affected;
    if (pattern instanceof SingleBlockPattern) {
      affected =
          editSession.makeCuboidFaces(
              session.getSelection(player.getWorld()), ((SingleBlockPattern) pattern).getBlock());
    } else {
      affected = editSession.makeCuboidFaces(session.getSelection(player.getWorld()), pattern);
    }

    player.print(affected + " block(s) have been changed.");
  }
  @Command(
      aliases = {"/move"},
      usage = "[count] [direction] [leave-id]",
      flags = "s",
      desc = "Move the contents of the selection",
      min = 0,
      max = 3)
  @CommandPermissions("worldedit.region.move")
  @Logging(ORIENTATION_REGION)
  public static void move(
      CommandContext args,
      WorldEdit we,
      LocalSession session,
      LocalPlayer player,
      EditSession editSession)
      throws WorldEditException {

    int count = args.argsLength() > 0 ? Math.max(1, args.getInteger(0)) : 1;
    Vector dir =
        we.getDirection(player, args.argsLength() > 1 ? args.getString(1).toLowerCase() : "me");
    BaseBlock replace;

    // Replacement block argument
    if (args.argsLength() > 2) {
      replace = we.getBlock(player, args.getString(2));
    } else {
      replace = new BaseBlock(BlockID.AIR);
    }

    int affected =
        editSession.moveCuboidRegion(
            session.getSelection(player.getWorld()), dir, count, true, replace);

    if (args.hasFlag('s')) {
      try {
        Region region = session.getSelection(player.getWorld());
        region.expand(dir.multiply(count));
        region.contract(dir.multiply(count));

        session.getRegionSelector().learnChanges();
        session.getRegionSelector().explainRegionAdjust(player, session);
      } catch (RegionOperationException e) {
        player.printError(e.getMessage());
      }
    }

    player.print(affected + " blocks moved.");
  }
  @Command(
      aliases = {"/smooth"},
      usage = "[iterations]",
      flags = "n",
      desc = "Smooth the elevation in the selection",
      min = 0,
      max = 1)
  @CommandPermissions("worldedit.region.smooth")
  @Logging(REGION)
  public static void smooth(
      CommandContext args,
      WorldEdit we,
      LocalSession session,
      LocalPlayer player,
      EditSession editSession)
      throws WorldEditException {

    int iterations = 1;
    if (args.argsLength() > 0) {
      iterations = args.getInteger(0);
    }

    HeightMap heightMap =
        new HeightMap(editSession, session.getSelection(player.getWorld()), args.hasFlag('n'));
    HeightMapFilter filter = new HeightMapFilter(new GaussianKernel(5, 1.0));
    int affected = heightMap.applyFilter(filter, iterations);
    player.print("Terrain's height map smoothed. " + affected + " block(s) changed.");
  }
  @Command(
      aliases = {"/overlay"},
      usage = "<block>",
      desc = "Set a block on top of blocks in the region",
      min = 1,
      max = 1)
  @CommandPermissions("worldedit.region.overlay")
  @Logging(REGION)
  public static void overlay(
      CommandContext args,
      WorldEdit we,
      LocalSession session,
      LocalPlayer player,
      EditSession editSession)
      throws WorldEditException {

    Pattern pat = we.getBlockPattern(player, args.getString(0));

    Region region = session.getSelection(player.getWorld());
    int affected = 0;
    if (pat instanceof SingleBlockPattern) {
      affected = editSession.overlayCuboidBlocks(region, ((SingleBlockPattern) pat).getBlock());
    } else {
      affected = editSession.overlayCuboidBlocks(region, pat);
    }
    player.print(affected + " block(s) have been overlayed.");
  }
  @Command(
      aliases = {"/stack"},
      usage = "[count] [direction]",
      flags = "sa",
      desc = "Repeat the contents of the selection",
      min = 0,
      max = 2)
  @CommandPermissions("worldedit.region.stack")
  @Logging(ORIENTATION_REGION)
  public static void stack(
      CommandContext args,
      WorldEdit we,
      LocalSession session,
      LocalPlayer player,
      EditSession editSession)
      throws WorldEditException {

    int count = args.argsLength() > 0 ? Math.max(1, args.getInteger(0)) : 1;
    Vector dir =
        we.getDiagonalDirection(
            player, args.argsLength() > 1 ? args.getString(1).toLowerCase() : "me");

    int affected =
        editSession.stackCuboidRegion(
            session.getSelection(player.getWorld()), dir, count, !args.hasFlag('a'));

    if (args.hasFlag('s')) {
      try {
        Region region = session.getSelection(player.getWorld());
        region.expand(dir.multiply(count));
        region.contract(dir.multiply(count));

        session.getRegionSelector().learnChanges();
        session.getRegionSelector().explainRegionAdjust(player, session);
      } catch (RegionOperationException e) {
        player.printError(e.getMessage());
      }
    }

    player.print(affected + " blocks changed. Undo with //undo");
  }
  @Command(
      aliases = {"/replace"},
      usage = "[from-block] <to-block>",
      desc = "Replace all blocks in the selection with another",
      flags = "f",
      min = 1,
      max = 2)
  @CommandPermissions("worldedit.region.replace")
  @Logging(REGION)
  public static void replace(
      CommandContext args,
      WorldEdit we,
      LocalSession session,
      LocalPlayer player,
      EditSession editSession)
      throws WorldEditException {

    Set<BaseBlock> from;
    Pattern to;
    if (args.argsLength() == 1) {
      from = null;
      to = we.getBlockPattern(player, args.getString(0));
    } else {
      from = we.getBlocks(player, args.getString(0), true, !args.hasFlag('f'));
      to = we.getBlockPattern(player, args.getString(1));
    }

    int affected = 0;
    if (to instanceof SingleBlockPattern) {
      affected =
          editSession.replaceBlocks(
              session.getSelection(player.getWorld()), from, ((SingleBlockPattern) to).getBlock());
    } else {
      affected = editSession.replaceBlocks(session.getSelection(player.getWorld()), from, to);
    }

    player.print(affected + " block(s) have been replaced.");
  }
  @Command(
      aliases = {"/regen"},
      usage = "",
      desc = "Regenerates the contents of the selection",
      min = 0,
      max = 0)
  @CommandPermissions("worldedit.regen")
  @Logging(REGION)
  public static void regenerateChunk(
      CommandContext args,
      WorldEdit we,
      LocalSession session,
      LocalPlayer player,
      EditSession editSession)
      throws WorldEditException {

    Region region = session.getSelection(player.getWorld());
    Mask mask = session.getMask();
    session.setMask(null);
    player.getWorld().regenerate(region, editSession);
    session.setMask(mask);
    player.print("Region regenerated.");
  }
  @Command(
      aliases = {"/naturalize"},
      usage = "",
      desc = "3 layers of dirt on top then rock below",
      min = 0,
      max = 0)
  @CommandPermissions("worldedit.region.naturalize")
  @Logging(REGION)
  public static void naturalize(
      CommandContext args,
      WorldEdit we,
      LocalSession session,
      LocalPlayer player,
      EditSession editSession)
      throws WorldEditException {

    Region region = session.getSelection(player.getWorld());
    int affected = editSession.naturalizeCuboidBlocks(region);
    player.print(affected + " block(s) have been naturalized.");
  }