import type { CollectionConfig } from "payload";

const isSelfOrAdmin = ({ req }: { req: { user?: { collection?: string; id?: unknown } | null } }) => {
  const user = req.user;
  if (!user) return false;
  if (user.collection === "users") return true;
  if (user.collection === "customers") return { id: { equals: user.id } };
  return false;
};

export const Customers: CollectionConfig = {
  slug: "customers",
  labels: {
    singular: "Kundin/Kunde",
    plural: "Kund:innen",
  },
  admin: {
    useAsTitle: "name",
    defaultColumns: ["name", "email", "phone"],
    group: "Buchungen",
    description: "Konten der Website-Besucher:innen (nicht die Admin-Zugänge unter „Benutzer:innen“).",
  },
  auth: {
    maxLoginAttempts: 8,
    lockTime: 10 * 60 * 1000,
  },
  access: {
    // Anyone can create their own account (registration); reading/updating
    // is restricted to the account owner or an admin.
    create: () => true,
    read: isSelfOrAdmin,
    update: isSelfOrAdmin,
    delete: ({ req }) => req.user?.collection === "users",
  },
  fields: [
    {
      name: "name",
      type: "text",
      label: "Name",
      required: true,
    },
    {
      name: "phone",
      type: "text",
      label: "Telefonnummer",
      required: false,
      admin: {
        description: "Optional — für eine spätere Nutzung vorbereitet, aktuell nicht verpflichtend.",
      },
    },
    // "email" and "password" are added automatically by the auth config.
  ],
};