import { isDid } from "./did";
import { parseExactOrigin } from "./origins";

export type SaveAction = "save" | "logout";

export type SaveQuery =
  | { ok: true; did: string; origin: string; action: SaveAction }
  | { ok: false; reason: string };

export function parseSaveQuery(url: URL): SaveQuery {
  const did = url.searchParams.get("did") ?? "";
  const origin = url.searchParams.get("origin") ?? "";
  const actionParam = url.searchParams.get("action") ?? "save";

  if (!isDid(did)) return { ok: false, reason: "did is required" };
  if (!origin) return { ok: false, reason: "origin is required" };

  const parsed = parseExactOrigin(origin);
  if (!parsed.ok) return { ok: false, reason: parsed.reason };

  if (actionParam !== "save" && actionParam !== "logout") {
    return { ok: false, reason: "action must be save or logout" };
  }

  return { ok: true, did, origin: parsed.origin, action: actionParam };
}