type ParsedInput =
  | { type: "message"; content: string }
  | { type: "command"; name: string; argument: string };

export function parseInput(value: string): ParsedInput | undefined {
  const input = value.trim();

  if (!input) return;
  if (!input.startsWith("/")) return { type: "message", content: input };
  if (input.startsWith("//")) {
    return { type: "message", content: input.slice(1) };
  }

  const separator = input.search(/\s/);
  const name = input.slice(1, separator < 0 ? undefined : separator).toLowerCase();
  const argument = separator < 0 ? "" : input.slice(separator + 1).trim();

  return { type: "command", name, argument };
}