Command Alias Mixin (CommandManagerExecuteMixin)

@Mixin(CommandManager.class)
public abstract class CommandManagerExecuteMixin {

    @Unique
    private static final ThreadLocal<Boolean> IS_ALIAS_REEXECUTION = ThreadLocal.withInitial(() -> false);

    @Inject(method = "execute(Lcom/mojang/brigadier/ParseResults;Ljava/lang/String;)V", at = @At("HEAD"), cancellable = true)
    private void Fantasy$interceptCommandExecution(ParseResults<ServerCommandSource> parseResults, String commandString, CallbackInfo ci) {
        ServerCommandSource source = parseResults.getContext().getSource();
        ServerPlayerEntity sender = source.getPlayer();

        if (sender == null) {
            return;
        }

        boolean isRecursiveAliasCall = IS_ALIAS_REEXECUTION.get();

        String enteredCommandName = commandString.split(" ")[0].toLowerCase().replaceFirst("^/", "");
        String canonicalCommandName = CM.getAliasToCanonicalNameMap().get(enteredCommandName);

        if (canonicalCommandName != null && !isRecursiveAliasCall) {
            String argsPart = "";
            int firstSpace = commandString.indexOf(' ');
            if (firstSpace != -1) {
                argsPart = commandString.substring(firstSpace);
            }

            String commandToExecute = canonicalCommandName + argsPart; // No leading slash for dispatcher.parse

            try {
                CommandDispatcher<ServerCommandSource> dispatcher = CM.getDispatcher();
                IS_ALIAS_REEXECUTION.set(true);
                ParseResults<ServerCommandSource> canonicalParseResults = dispatcher.parse(commandToExecute, source);
                dispatcher.execute(canonicalParseResults);
            } catch (Exception e) {
                // Error handling for execution failures
            } finally {
                IS_ALIAS_REEXECUTION.set(false);
            }

            ci.cancel();
            return;
        }
    }
}