import { z } from 'zod';
import { CursorSchema } from './primitives.js';

export const FileKindSchema = z.enum(['file', 'dir']);
export type FileKind = z.infer<typeof FileKindSchema>;

/**
 * Directory entry shape. App-specific extension via `metadata` — keep it
 * lean; large blobs (thumbnails) belong in `getThumbnail`, not here.
 */
export const FileEntrySchema = z.object({
  /** Base name only — no path separators. */
  name: z.string().min(1).max(512).refine((s) => !s.includes('/') && !s.includes('\\'), {
    message: 'name must not contain path separators',
  }),
  kind: FileKindSchema,
  /** Plaintext byte size; 0 for directories. */
  size: z.number().int().nonnegative(),
  /** Last-modified time, unix milliseconds. */
  mtime: z.number().int(),
  /** RFC 6838 media type if known. */
  contentType: z.string().max(255).optional(),
  /** App-specific extension fields. Default empty. */
  metadata: z.record(z.string(), z.unknown()).default({}),
});
export type FileEntry = z.infer<typeof FileEntrySchema>;

export const ListPageSchema = z.object({
  entries: z.array(FileEntrySchema),
  nextCursor: CursorSchema.optional(),
  hasMore: z.boolean(),
});
export type ListPage = z.infer<typeof ListPageSchema>;