// Transport facade. The rest of the app (inbox-service, Messages) imports
// send/poll/stream/decrypt from here and never learns which pipe carries
// the bytes. Both transports expose an identical surface and both ship the
// same sealed envelope from crypto.ts — only the delivery mechanism differs.
//
//   VITE_TRANSPORT=server  (default) → kez-chat server inbox over HTTP/SSE
//   VITE_TRANSPORT=nostr            → Nostr relays
//
// Set it in .env / .env.local. Switching transports is build-time; there's
// no reason to flip it at runtime and keeping it static lets Vite tree-shake
// the unused transport out of the bundle.

import * as server from "./messages.js";
import * as nostr from "./nostr-transport.js";

const TRANSPORT = (import.meta.env.VITE_TRANSPORT ?? "server") as "server" | "nostr";

const impl = TRANSPORT === "nostr" ? nostr : server;

export const sendMessage = impl.sendMessage;
export const pollInbox = impl.pollInbox;
export const streamInbox = impl.streamInbox;
export const decrypt = impl.decrypt;
/** Publish a delivery receipt for a message we just decrypted, so the
 *  original sender's UI can flip the bubble from "sent" to "delivered".
 *  No-op on the server transport for now. */
export const sendAck = impl.sendAck;
/** Retry any acks that failed to publish on first attempt. Called on
 *  session start so a flaky relay moment doesn't permanently strand
 *  receipts. */
export const flushPendingAcks = impl.flushPendingAcks;
/** Catch-up query: given a list of recently-sent event ids, returns
 *  the subset for which a recipient ack has been published. Lets the
 *  sender's UI self-heal "delivered" state on conversation open
 *  instead of relying solely on the live stream. */
export const fetchAcksForEventIds = impl.fetchAcksForEventIds;
/** Wire the user's seed into the relay pool so NIP-42 AUTH challenges
 *  get signed transparently. No-op on the server transport. */
export const attachSigner = impl.attachSigner;
export const detachSigner = impl.detachSigner;
/** Snapshot of every configured relay (or the single chat-server) +
 *  whether the socket is currently open. Drives the "● live (N)"
 *  indicator and its popover. */
export const getRelayStatuses = impl.getRelayStatuses;

export type { InboxMessage, StreamHandle, SealedEnvelope, MessagePlaintext } from "./messages.js";
export type { RelayStatus } from "./messages.js";

/** Which transport this build is using — handy for a debug line in the UI. */
export const activeTransport = TRANSPORT;