import type { SubviewUrl } from "../lib/history";

// The sign-in card's sub-view type and its URL mirror, split out of Welcome so that file exports only
// components (Fast Refresh).

export type Mode = "signin" | "register" | "forgot" | "reset" | "resend";

// The card's sub-views are real history entries, so browser/mouse Back leaves one the way it leaves
// any other page — they used to be plain state, and Back silently changed only the address bar.
// "signin" is the root (no param) and "reset" is deliberately NOT mirrored: that view is only
// reachable with the one-time token from the #reset fragment, so a bookmarked ?m=reset would open a
// form that cannot submit.
export const MODE_URL: SubviewUrl<Mode> = {
  key: "m",
  encode: (m: Mode) => (m === "signin" || m === "reset" ? null : m),
  decode: (raw: string) =>
    raw === "register" || raw === "forgot" || raw === "resend" ? (raw as Mode) : null,
};