/** Setup and search readiness are independent: media downloads need not block text. */
export type SemanticCoverage = "text_only" | "full_media";

export interface SemanticSetupStatus {
  ready: boolean;
  generation: number | null;
  pending: number;
  downloading: boolean;
  warming: boolean;
  embedding: boolean;
  error: string | null;
  indexing_ready?: boolean;
  text_model_ready?: boolean;
  media_model_ready?: boolean;
  media_model_error?: string | null;
  requested_coverage?: SemanticCoverage;
}

export function semanticIndexReady(status: SemanticSetupStatus) {
  return Boolean(
    status.ready &&
      !status.warming &&
      !status.embedding &&
      (status.indexing_ready ?? !status.downloading),
  );
}

/** Promotion must receive its own automatic attempt even with unchanged counts. */
export function semanticIndexKey(
  status: SemanticSetupStatus,
  folderRevision: number,
) {
  return `${status.generation}:${status.pending}:${folderRevision}:${status.requested_coverage ?? "full_media"}`;
}

export function semanticRetryVisible(status: SemanticSetupStatus) {
  return Boolean(status.media_model_error || (status.error && !status.ready));
}

export function semanticMediaReady(status: SemanticSetupStatus) {
  // Legacy capture fixtures and older full-pair status did not expose this field.
  return status.media_model_ready ?? (status.ready && !status.downloading);
}