Tab completer kinda

src/main/java/com/pobnellion/floorGame/FloorGame.java

@@ -1,6 +1,7 @@
 package com.pobnellion.floorGame;
 
 import com.pobnellion.floorGame.command.CommandFloorGame;
+import com.pobnellion.floorGame.command.TabCompleterFloorGame;
 import com.pobnellion.floorGame.game.GameConfig;
 import com.pobnellion.floorGame.game.GameInstance;
 import org.bukkit.configuration.file.FileConfiguration;
@@ -23,6 +24,7 @@ public final class FloorGame extends JavaPlugin {
 
         // Register commands
         this.getCommand("floorgame").setExecutor(new CommandFloorGame());
+        this.getCommand("floorgame").setTabCompleter(new TabCompleterFloorGame());
     }
 
     @Override

src/main/java/com/pobnellion/floorGame/command/CommandFloorGame.java

@@ -16,15 +16,13 @@ public class CommandFloorGame implements CommandExecutor {
         if (args.length == 0)
             return false;
 
-        switch (args[0]) {
+        switch (args[0].toLowerCase()) {
             case "start" -> Start(sender);
             case "stop" -> Stop(sender);
             case "config" -> Config(sender, args);
             default -> sender.sendMessage(ChatColor.RED + "Usage: /floorgame < start | stop |config >");
         }
 
-        // TODO: tab completer
-
         return true;
     }
 

src/main/java/com/pobnellion/floorGame/command/TabCompleterFloorGame.java

@@ -0,0 +1,62 @@
+package com.pobnellion.floorGame.command;
+
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.TabCompleter;
+import org.bukkit.entity.Player;
+
+import java.util.List;
+
+public class TabCompleterFloorGame implements TabCompleter {
+    @Override
+    public List<String> onTabComplete(CommandSender sender, Command command, String label, String[] args) {
+        if (args.length == 1)
+            return List.of("start", "stop", "config");
+
+        if (!args[0].equalsIgnoreCase("config"))
+            return List.of();
+
+        if (args.length == 2)
+            return List.of("playerJoinArea", "spectatorJoinArea", "postGameTpLocation", "floorCenter", "tileSize",
+                    "gridSize", "failLimit", "playersHaveKnockbackStick", "playersHaveFishingRod", "spectatorsCanMessWithPlayers");
+
+        return switch (args[1]) {
+            case "playerJoinArea", "spectatorJoinArea" -> AreaCompleter(sender, args, 3);
+            case "postGameTpLocation", "floorCenter" -> LocationCompleter(sender, args, 3);
+            case "playersHaveKnockbackStick", "playersHaveFishingRod", "spectatorsCanMessWithPlayers" ->
+                    args.length == 3 ? List.of("true", "false") : List.of();
+            default -> List.of();
+        };
+
+        // TODO: limit options based on current arg value
+        // https://www.spigotmc.org/threads/how-to-create-a-tabcompleter-for-a-command.591865/
+    }
+
+    private List<String> AreaCompleter(CommandSender sender, String[] args, int locationArgIndex) {
+        if (!(sender instanceof Player))
+            return List.of();
+
+        var ret = LocationCompleter(sender, args, locationArgIndex);
+        if (!ret.isEmpty())
+            return ret;
+
+        return LocationCompleter(sender, args, locationArgIndex + 3);
+    }
+
+    private List<String> LocationCompleter(CommandSender sender, String[] args, int locationArgIndex) {
+        if (!(sender instanceof Player))
+            return List.of();
+
+        sender.sendMessage(Integer.toString(args.length));
+
+        if (args.length - locationArgIndex >= 3)
+            return List.of();
+
+        var targetBlock = ((Player) sender).getTargetBlockExact(10);
+        var targetXYZ = targetBlock == null
+                ? List.of("~", "~", "~")
+                : List.of(Integer.toString(targetBlock.getX()), Integer.toString(targetBlock.getY()), Integer.toString(targetBlock.getZ()));
+
+        return List.of(String.join(" ", targetXYZ.subList(args.length - locationArgIndex, 3)));
+    }
+}