import {
  EXCLUDE_TRUNCATED_CHECK_FILENAME,
  type ExcludeTruncatedCheckRecord,
} from "./excludeTruncatedCheck";
import { sidecar, sidecarField } from "./sidecar-server";

// Parseable-but-malformed still means "excluded" — the doNotClean rule.
export function coerceExcludeTruncatedCheck(
  value: unknown,
): ExcludeTruncatedCheckRecord {
  const parsed = value as Partial<ExcludeTruncatedCheckRecord> | null;
  if (typeof parsed?.setAt === "string") {
    return parsed as ExcludeTruncatedCheckRecord;
  }
  return { setAt: "" };
}

export const excludeTruncatedCheckSidecar = sidecar(
  EXCLUDE_TRUNCATED_CHECK_FILENAME,
  sidecarField(coerceExcludeTruncatedCheck),
);

export const {
  path: excludeTruncatedCheckPath,
  load: loadExcludeTruncatedCheck,
} = excludeTruncatedCheckSidecar;

// Presence of a valid sidecar = excluded from the truncated check. Cheap
// existence check for the snapshot generator's per-dir loop.
export async function isExcludedFromTruncatedCheck(
  videoDir: string,
): Promise<boolean> {
  return (await loadExcludeTruncatedCheck(videoDir)) !== null;
}

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