import { defineCollection } from "astro:content";
import { glob } from "astro/loaders";
// Not astro:content's re-export, which is deprecated.
import { z } from "astro/zod";

/**
 * Updates are markdown files; the schema keeps a frontmatter typo from
 * shipping as a page with no date on it.
 *
 * The field names match what standard.site publishing tools (sequoia) read:
 * title, description, publishDate, tags, draft. atUri is the reverse
 * direction — sequoia writes the document record's at:// URI back into the
 * frontmatter once a post has one, and the layout turns it into a
 * rel="site.standard.document" link tag.
 */
const posts = defineCollection({
  loader: glob({ base: "./src/content/posts", pattern: "**/*.md" }),
  schema: z.object({
    title: z.string(),
    description: z.string(),
    publishDate: z.coerce.date(),
    updatedDate: z.coerce.date().optional(),
    tags: z.array(z.string()).default([]),
    draft: z.boolean().default(false),

    // Absent until published; a post without one renders no
    // site.standard.document link rather than an empty href.
    atUri: z.string().startsWith("at://").optional(),
  }),
});

export const collections = { posts };