export type StartupDeepLinkIntent =
  | "felicaHistory"
  | "trainInfo"
  | "operation"
  | "settings"
  | "topMenu"
  | "positions";

const STARTUP_DEEP_LINK_PATTERNS: ReadonlyArray<{
  intent: StartupDeepLinkIntent;
  patterns: readonly string[];
}> = [
  {
    intent: "felicaHistory",
    patterns: ["felicahistorypage", "open/felica"],
  },
  { intent: "trainInfo", patterns: ["open/traininfo"] },
  { intent: "operation", patterns: ["open/operation"] },
  { intent: "settings", patterns: ["open/settings"] },
  { intent: "topMenu", patterns: ["open/topmenu"] },
  { intent: "positions", patterns: ["positions/apps"] },
];

/** Parse a supported app URL without touching navigation or timers. */
export const parseStartupDeepLinkIntent = (
  url: string | null | undefined,
): StartupDeepLinkIntent | null => {
  const normalized = (url ?? "").trim().toLowerCase();
  if (!normalized) return null;

  return (
    STARTUP_DEEP_LINK_PATTERNS.find(({ patterns }) =>
      patterns.some((pattern) => normalized.includes(pattern)),
    )?.intent ?? null
  );
};