import { z } from 'zod';

import type { ApiTokenScope } from './api-tokens';
import type { CommentView } from './comments';
import type { LabelTreeNode, LabelView } from './labels';

/**
 * Wire types of the public REST API (`/api/public/v1`, issue #104). The
 * shapes are deliberately independent of the internal views: this surface
 * is versioned and consumed by scripts and MCP clients, so it exposes
 * slugs and stable ids, never internal implementation details.
 */

export interface PublicMeView {
  user: { id: string; username: string; displayName: string };
  scope: ApiTokenScope;
  /** Pond restriction (slugs); empty = every pond the user may access. */
  pondSlugs: string[];
}

export interface PublicPondView {
  slug: string;
  name: string;
  description: string;
  type: 'personal' | 'shared';
  createdAt: string;
}

export interface PublicPageListItemView {
  slug: string;
  title: string;
  /** Parent page slug in the tree (issue #110), or null at the root — nulled
   * as well when the token's user may not read the parent (no existence leak). */
  parent: string | null;
  labels: string[];
  createdAt: string;
  updatedAt: string;
}

export interface PublicPageView {
  slug: string;
  title: string;
  pondSlug: string;
  /** Parent page slug (issue #110); see {@link PublicPageListItemView.parent}. */
  parent: string | null;
  markdown: string;
  html: string;
  labels: string[];
  createdAt: string;
  updatedAt: string;
}

/** Bounded well above every realistic page (the editor caps documents far
 * lower); the limit only stops abuse of the raw endpoint. */
const MARKDOWN_MAX_BYTES = 2 * 1024 * 1024;

export const publicCreatePageInputSchema = z.object({
  title: z.string().trim().min(1, 'validation.required').max(200, 'validation.tooLong'),
  markdown: z.string().max(MARKDOWN_MAX_BYTES).default(''),
  /** Parent page slug (issue #110) — nests the new page under it. */
  parent: z.string().min(1).optional(),
});
export type PublicCreatePageInput = z.infer<typeof publicCreatePageInputSchema>;

export const publicUpdatePageInputSchema = z
  .object({
    title: z.string().trim().min(1, 'validation.required').max(200, 'validation.tooLong'),
    /** Replace semantics: the whole content becomes this Markdown. */
    markdown: z.string().max(MARKDOWN_MAX_BYTES),
    /** Move in the tree (issue #110): a page slug nests, `null` moves to the
     * root; the page lands at the end of its new sibling group. */
    parent: z.string().min(1).nullable(),
  })
  .partial()
  .refine(
    (input) =>
      input.title !== undefined || input.markdown !== undefined || input.parent !== undefined,
    { message: 'validation.required' },
  );
export type PublicUpdatePageInput = z.infer<typeof publicUpdatePageInputSchema>;

/**
 * One PATCH covers rename, recolour, and move (the internal API splits
 * update and move); `parentId: null` moves the label to the root.
 */
export const publicUpdateLabelInputSchema = z
  .object({
    name: z.string().trim().min(1, 'validation.required').max(60, 'validation.tooLong'),
    color: z.string().regex(/^#[0-9a-fA-F]{6}$/, 'validation.invalid'),
    parentId: z.string().min(1).nullable(),
  })
  .partial();
export type PublicUpdateLabelInput = z.infer<typeof publicUpdateLabelInputSchema>;

export const publicSearchQuerySchema = z.object({
  q: z.string().trim().min(1, 'validation.required').max(200),
  pond: z.string().trim().optional(),
  label: z.string().trim().optional(),
});
export type PublicSearchQuery = z.infer<typeof publicSearchQuerySchema>;

export interface PublicSearchResultView {
  pondSlug: string;
  pageSlug: string;
  title: string;
  snippet: string;
}

/** Re-exported internal shapes the public surface serves verbatim. */
export type PublicLabelTree = LabelTreeNode[];
export type PublicLabelView = LabelView;
export type PublicCommentView = CommentView;