import type { CommunicationRequest } from 'fhir/r4';
import { isEncounterRoomThreadId } from '../encounterRoomThread';

// A VISIT'S OWN THREAD HAS NO SINGLE PERSON TO NAME, WHICH IS THE SAME SHAPE AS THE POOL.
//
// The room's roster is whoever was admitted to it, written server-side at admission. So the swap every
// other surface uses - *"if I am the sender the other party is the recipient, otherwise the sender"* -
// has nothing to land on, exactly as `poolThread.ts` records for the front desk.
//
// MEASURED on journey C11, from the patient's own inbox after a video visit: the row read
// **"Unknown - Staff"**, and opening it threw `Unable to resolve practitioner for selected chat`,
// which cleared the unread badge and rendered nothing. The patient was told they had no unread
// messages and never saw the message. That is the step's own subject - *the visit's own thread,
// open to whoever entered the room, outliving the call* - failing after the call.
//
// THE THREAD ID IS THE REQUEST ID on these shells, which is the same assumption every send on this
// surface already makes (`createCommunicationForThread(text, request.id, ...)`). The predicate itself
// is the server-mirrored one, which counts '#' rather than matching a prefix, so a patient whose FHIR
// id is literally `encounter` cannot route a direct thread through the room roster.
export const isEncounterRoomThreadRequest = (request: CommunicationRequest | undefined): boolean =>
    isEncounterRoomThreadId(request?.id);

// NAMED FOR THE VISIT, not for the practice and not for a person.
//
// "Great River Health Center" is already on the row's organization line, and repeating it as the title
// would tell the reader nothing about which conversation this is. A patient recognises this thread as
// the visit it belongs to.
export const ROOM_THREAD_LABEL = 'Video visit';

// The line UNDER the name, on the pool's reasoning: it says what the thread IS, so it stays useful
// when the practice name has not resolved, and it does not repeat the title.
export const ROOM_THREAD_DESCRIPTION = 'Messages from your visit';