import { z } from 'zod';

/**
 * Page schemas and views shared between api and web (issue #23). A page
 * carries a Yjs document from day one (ADR 0003); in M2 its state is
 * saved wholesale over REST as a base64 string.
 */

export const pageTitleSchema = z
  .string()
  .trim()
  .min(1, 'validation.required')
  .max(200, 'validation.tooLong');

export const pageSlugSchema = z
  .string()
  .trim()
  .min(1, 'validation.required')
  .max(60, 'validation.tooLong');

export const createPageInputSchema = z.object({
  title: pageTitleSchema,
});
export type CreatePageInput = z.infer<typeof createPageInputSchema>;

export const updatePageInputSchema = z
  .object({
    title: pageTitleSchema,
    slug: pageSlugSchema,
  })
  .partial();
export type UpdatePageInput = z.infer<typeof updatePageInputSchema>;

export const savePageStateInputSchema = z.object({
  /** Base64-encoded Yjs state (`Y.encodeStateAsUpdate`). */
  state: z.string().min(1, 'validation.required'),
});
export type SavePageStateInput = z.infer<typeof savePageStateInputSchema>;

/** Max Yjs document size (operations.md §Limits) — a fixed operational
 * ceiling, not a per-pond/user quota. */
export const MAX_PAGE_DOCUMENT_BYTES = 5 * 1024 * 1024;

export interface PageView {
  id: string;
  pondId: string;
  title: string;
  slug: string;
  sortKey: string;
  createdAt: string;
  updatedAt: string;
  deletedAt: string | null;
}

/** What `GET /pages/:id` returns: page meta plus its base64 Yjs state. */
export interface PageStateView extends PageView {
  state: string;
}