/**
 * Car-angle captures must live under {@code media.carAngles} with lowercase keys
 * {@code front | back | left | right}. Clients sometimes send Title Case keys or
 * mistakenly use {@code captureType: "part"} for angles, which previously wrote
 * into {@code media.damagedParts} and broke step-completion checks.
 */

export const CLAIM_CAR_ANGLE_KEYS = ["front", "back", "left", "right"] as const;
export type ClaimCarAngleKey = (typeof CLAIM_CAR_ANGLE_KEYS)[number];

export function canonicalizeClaimCarAngleKey(
  raw: string | undefined | null,
): ClaimCarAngleKey | null {
  const t = String(raw ?? "").trim().toLowerCase();
  return (CLAIM_CAR_ANGLE_KEYS as readonly string[]).includes(t)
    ? (t as ClaimCarAngleKey)
    : null;
}

function getCaptureBlob(data: unknown, key: string): unknown {
  if (data == null) return undefined;
  if (data instanceof Map) return (data as Map<string, unknown>).get(key);
  return (data as Record<string, unknown>)[key];
}

/** Prefer carAngles; fall back to legacy mis-placed blobs under damagedParts. */
export function getClaimCarAngleCaptureBlob(
  carAnglesData: unknown,
  damagedPartsData: unknown,
  angle: ClaimCarAngleKey,
): unknown {
  return (
    getCaptureBlob(carAnglesData, angle) ??
    getCaptureBlob(damagedPartsData, angle) ??
    getCaptureBlob(
      damagedPartsData,
      angle.charAt(0).toUpperCase() + angle.slice(1),
    )
  );
}

export function hasClaimCarAngleCapture(
  carAnglesData: unknown,
  damagedPartsData: unknown,
  angle: ClaimCarAngleKey,
): boolean {
  return getClaimCarAngleCaptureBlob(carAnglesData, damagedPartsData, angle) != null;
}

/**
 * Field names under media.damagedParts that should be removed when we persist the
 * same shot under media.carAngles (migration). Skips keys that are also real selected part ids.
 */
export function legacyAngleDamagedPartFieldKeysToUnset(
  canonical: ClaimCarAngleKey,
  rawCaptureKey: string,
  selectedParts: string[],
): string[] {
  const selected = new Set((selectedParts ?? []).map((p) => String(p)));
  const variants = new Set(
    [
      rawCaptureKey,
      canonical,
      canonical.charAt(0).toUpperCase() + canonical.slice(1),
    ].filter(Boolean),
  );
  const out: string[] = [];
  for (const k of variants) {
    if (canonicalizeClaimCarAngleKey(k) === null) continue;
    if (selected.has(k)) continue;
    out.push(k);
  }
  return [...new Set(out)];
}