import {
  DO_NOT_CLEAN_FILENAME,
  type DoNotCleanRecord,
} from "./doNotClean";
import { sidecar, sidecarField } from "./sidecar-server";

// A parseable-but-malformed marker still means "protected" — it reads as an
// empty record rather than as absent. Only an absent, unreadable or
// unparseable file reads as null (sidecar-server's rule).
export function coerceDoNotClean(value: unknown): DoNotCleanRecord {
  const parsed = value as Partial<DoNotCleanRecord> | null;
  if (typeof parsed?.setAt === "string") return parsed as DoNotCleanRecord;
  return { setAt: "" };
}

export const doNotCleanSidecar = sidecar(
  DO_NOT_CLEAN_FILENAME,
  sidecarField(coerceDoNotClean),
);

export const { path: doNotCleanPath, load: loadDoNotClean } = doNotCleanSidecar;

// Presence of a valid sidecar = protected. Cheap existence check for the
// cleanup controllers' per-dir loops.
export async function isDoNotClean(videoDir: string): Promise<boolean> {
  return (await loadDoNotClean(videoDir)) !== null;
}

export async function setDoNotClean(
  videoDir: string,
  enabled: boolean,
  note?: string,
): Promise<void> {
  if (!enabled) return doNotCleanSidecar.remove(videoDir);
  await doNotCleanSidecar.write(videoDir, {
    setAt: new Date().toISOString(),
    ...(note ? { note } : {}),
  });
}