import type { Field } from "payload";

/**
 * Reusable, always-optional SEO field group — added to every public-facing
 * collection/global. Never required: every consumer falls back to a
 * sensible, automatically derived value when a field is left empty (see
 * lib/seo/resolve.ts), per the "SEO fields are optional with fallbacks"
 * requirement.
 */
export function seoFields(): Field {
  return {
    type: "collapsible",
    label: "SEO",
    admin: {
      description: "Optional — wird automatisch aus dem Inhalt abgeleitet, wenn hier nichts eingetragen ist.",
    },
    fields: [
      {
        name: "seo",
        type: "group",
        label: "",
        fields: [
          {
            name: "title",
            type: "text",
            label: "SEO Title",
            maxLength: 70,
            admin: { description: "Falls leer: automatisch aus dem Seitentitel erzeugt." },
          },
          {
            name: "description",
            type: "textarea",
            label: "Meta Description",
            maxLength: 300,
            admin: { description: "Falls leer: automatisch aus dem Inhalt erzeugt (erste ~160 Zeichen)." },
          },
          {
            name: "keywords",
            type: "text",
            label: "SEO Keywords (optional, kommagetrennt)",
          },
          {
            name: "ogImage",
            type: "upload",
            relationTo: "media",
            label: "Open Graph Bild",
            admin: { description: "Falls leer: Hauptbild dieser Seite bzw. das Standard-Social-Bild aus den SEO-Einstellungen." },
          },
        ],
      },
    ],
  };
}