type returnBetweenType = {
  isBetween: true;
  Pos: {
    from: string;
    to: string;
  };
};
type returnCurrentType = {
  isBetween: false;
  Pos: {
    Pos: string;
  };
};
export type trainDataType = {
  Pos?: string;
  Direction?: number;
  Index?: number;
  Line?: string;
  PosNum?: number;
  Type?: string;
  delay?: string | number;
  num?: string;
};
type trainData = (
  trainData: trainDataType
) => returnBetweenType | returnCurrentType;

export const trainPosition: trainData = (trainData) => {
  if (!trainData?.Pos) return { isBetween: false, Pos: { Pos: "" } };
  const { Pos, Direction } = trainData;
  if (Pos.match("～")) {
    const [topST, downST] = Pos.replace("（下り）", "")
      .replace("（上り）", "")
      .split("～");
    const from = Direction == 1 ? topST : downST;
    const to = Direction == 1 ? downST : topST;
    return { isBetween: true, Pos: { from, to } };
  } else return { isBetween: false, Pos: { Pos } };
};