export interface ShipImageInfo {
  picId: number;
  path: string;
  copyright: string;
  date: string;
}

const BASE = '/signal-batch';

export async function fetchShipImagesByImo(
  imo: number,
  signal?: AbortSignal,
): Promise<ShipImageInfo[]> {
  const res = await fetch(`${BASE}/api/v2/shipimg/${imo}`, { signal, headers: { accept: 'application/json' } });
  if (!res.ok) return [];
  const json: unknown = await res.json();
  return Array.isArray(json) ? json : [];
}

const ensureJpg = (path: string, suffix: '_1.jpg' | '_2.jpg'): string => {
  if (/\.jpe?g$/i.test(path)) return path;
  return `${path}${suffix}`;
};

export const toThumbnailUrl = (path: string): string => {
  const normalized = ensureJpg(path, '_1.jpg');
  return normalized.startsWith('http') || normalized.startsWith('/') ? normalized : `/shipimg/${normalized}`;
};

export const toHighResUrl = (path: string): string => {
  const withExt = ensureJpg(path, '_2.jpg');
  const resolved = withExt.startsWith('http') || withExt.startsWith('/') ? withExt : `/shipimg/${withExt}`;
  return resolved.replace(/_1\.jpg$/i, '_2.jpg');
};