import type { ActingAsScope } from "../services/AuthService";
import { adolescentGateReason, type AdolescentGateReason } from "./adolescentFeatureGate";

/**
 * A scoped switch-in shows one part of the subject's record and the way out, nothing else: billing their
 * invoices, messaging their Messages (an assist-only helper the patient let message for them).
 */
export const SCOPED_SWITCH_IN: Record<ActingAsScope, { navIds: Set<string>; path: string }> = {
  billing: { navIds: new Set(["invoices", "logout"]), path: "/dashboard/my-invoices" },
  messaging: { navIds: new Set(["messages", "logout"]), path: "/dashboard/messages" },
};

type SelfIdentity = Parameters<typeof adolescentGateReason>[0];

export type ScopedSwitchInStep =
  | { kind: "stay" }
  | { kind: "go"; path: string }
  | { kind: "held"; reason: Exclude<AdolescentGateReason, "not-applicable"> };

// Holds when Messages is 18+-closed to the signed-in helper; redirecting there would bounce home forever.
export function scopedSwitchInStep(scope: ActingAsScope, pathname: string, self: SelfIdentity): ScopedSwitchInStep {
  if (scope === "messaging") {
    const reason = adolescentGateReason(self);
    if (reason !== "not-applicable") return { kind: "held", reason };
  }
  const { path } = SCOPED_SWITCH_IN[scope];
  return pathname === path ? { kind: "stay" } : { kind: "go", path };
}