import type { ApiSession, SessionPayload } from "../../services/api/sessions";
import type { ApiTrack } from "../../services/api/tracks";

/** Resolved Q&A flag (supports legacy `qnaEnabled` on older session documents). */
export function effectiveEnableQnA(s: ApiSession): boolean {
  if (typeof s.enableQnA === "boolean") return s.enableQnA;
  const legacy = (s as ApiSession & { qnaEnabled?: boolean }).qnaEnabled;
  if (typeof legacy === "boolean") return legacy;
  return true;
}

export function effectiveEnableQnP(s: ApiSession): boolean {
  if (typeof s.enableQnP === "boolean") return s.enableQnP;
  return true;
}

export function sessionToPayload(s: ApiSession): SessionPayload {
  const trackRaw = s.track;
  let track: string | null = null;
  if (trackRaw && typeof trackRaw === "object" && "_id" in trackRaw) track = String((trackRaw as ApiTrack)._id);
  else if (typeof trackRaw === "string" && trackRaw.trim()) track = trackRaw;

  const speakers = (s.speakers || []).map((x) => (typeof x === "string" ? x : x._id));
  const keyPersons =
    Array.isArray(s.keyPersons) && s.keyPersons.length
      ? s.keyPersons
          .map((kp) => {
            const speakerId =
              typeof kp.speaker === "object" && kp.speaker && "_id" in kp.speaker
                ? String(kp.speaker._id)
                : String(kp.speaker || "");
            if (!speakerId) return null;
            return { speaker: speakerId, role: String(kp.role || "Speaker").trim() || "Speaker" };
          })
          .filter((x): x is { speaker: string; role: string } => Boolean(x))
      : speakers.map((speaker) => ({ speaker, role: "Speaker" }));

  return {
    title: s.title,
    description: s.description ?? "",
    type: s.type,
    startTime: s.startTime,
    endTime: s.endTime,
    location: s.location,
    track,
    speakers,
    keyPersons,
    moderator: s.moderator ?? null,
    capacity: s.capacity,
    status: s.status,
    resources: s.resources,
    audienceFeedbackEnabled: s.audienceFeedbackEnabled,
    audienceRatingsEnabled: s.audienceRatingsEnabled,
    audienceKeyPersonsEnabled: s.audienceKeyPersonsEnabled,
    audienceMySessionsEnabled: s.audienceMySessionsEnabled,
    audienceAgendaEnabled: s.audienceAgendaEnabled,
    audienceFeedbackForm: s.audienceFeedbackForm ?? null,
    audienceRatingsForm: s.audienceRatingsForm ?? null,
    enableQnA: effectiveEnableQnA(s),
    enableQnP: effectiveEnableQnP(s),
  };
}