import Properties from "../../shared/settings/Properties";

const mustNumber = (v: any): number => {
  const num = Number(v);
  if (isNaN(num)) {
    throw new Error("Not number: " + v);
  }
  return num;
};

const parseSetOption = (args: string): any[] => {
  let [key, value]: any[] = args.split("=");
  if (value === undefined) {
    value = !key.startsWith("no");
    key = value ? key : key.slice(2);
  }
  const def = Properties.def(key);
  if (!def) {
    throw new Error("Unknown property: " + key);
  }
  if (
    (def.type === "boolean" && typeof value !== "boolean") ||
    (def.type !== "boolean" && typeof value === "boolean")
  ) {
    throw new Error("Invalid argument: " + args);
  }

  switch (def.type) {
    case "string":
      return [key, value];
    case "number":
      return [key, mustNumber(value)];
    case "boolean":
      return [key, value];
    default:
      throw new Error("Unknown property type: " + def.type);
  }
};

export { parseSetOption };