/**
 * Add a field to a LIVE PocketBase collection, idempotently.
 *
 * Exists because this repo's `pb_schema (1).json` is a stale export:
 * it lists fields the database does not have (and omits whole
 * collections). PocketBase SILENTLY DROPS unknown fields on update — no
 * error, no failed response — so code written against a phantom field
 * appears to work while storing nothing.
 *
 * SAFETY:
 *   - Prints the current state and exits 0 if the field already exists.
 *   - Sends the FULL `fields[]` array back with one addition.
 *     `PATCH /api/collections/:c/fields/:id` 404s on PocketBase, so the
 *     collection-level PATCH is the supported route.
 *   - Re-reads afterwards and diffs field-by-field, failing loudly if
 *     anything other than the addition changed.
 *
 * Usage:
 *   npx tsx scripts/add-collection-field.ts order_items collection_date date
 *   npx tsx scripts/add-collection-field.ts order_items pool_entered_at date
 */
import { config } from "dotenv";

config({ path: ".env.local" });
config({ path: ".env" });

const url = process.env.NEXT_PUBLIC_POCKETBASE_URL || "";
const email = process.env.PB_ADMIN_EMAIL || "";
const password = process.env.PB_ADMIN_PASSWORD || "";

type Field = Record<string, unknown> & { name: string; type: string };

const [, , collectionArg, nameArg, typeArg] = process.argv;

if (!collectionArg || !nameArg || !typeArg) {
  console.error(
    "usage: npx tsx scripts/add-collection-field.ts <collection> <field_name> <type>",
  );
  process.exit(2);
}

async function auth(): Promise<string> {
  const res = await fetch(`${url}/api/collections/_superusers/auth-with-password`, {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({ identity: email, password }),
  });
  if (!res.ok) throw new Error(`auth failed: ${res.status} ${await res.text()}`);
  return ((await res.json()) as { token: string }).token;
}

async function getCollection(token: string, name: string) {
  const res = await fetch(`${url}/api/collections/${name}`, {
    headers: { Authorization: token },
  });
  if (!res.ok) throw new Error(`get ${name} failed: ${res.status} ${await res.text()}`);
  return (await res.json()) as { fields: Field[] };
}

async function main() {
  if (!url || !email || !password) throw new Error("missing PB env vars");

  const token = await auth();
  const before = await getCollection(token, collectionArg);

  console.log(`${collectionArg}: ${before.fields.length} fields`);
  const existing = before.fields.find((f) => f.name === nameArg);
  if (existing) {
    console.log(`\n${nameArg} already exists (${existing.type}) — nothing to do.`);
    return;
  }

  // Copy the shape of an existing field of the same type so the new one
  // matches its siblings (PB stores per-field config beyond type/name).
  const template = before.fields.find((f) => f.type === typeArg);
  const newField: Field = {
    ...(template ?? {}),
    id: `fld_${nameArg.replace(/[^a-z0-9]/gi, "_").slice(0, 11)}`,
    name: nameArg,
    type: typeArg,
    required: false,
    presentable: false,
    hidden: false,
    system: false,
  };

  const fields = [...before.fields, newField];

  const patchRes = await fetch(`${url}/api/collections/${collectionArg}`, {
    method: "PATCH",
    headers: { Authorization: token, "Content-Type": "application/json" },
    body: JSON.stringify({ fields }),
  });
  if (!patchRes.ok) {
    throw new Error(`patch failed: ${patchRes.status} ${await patchRes.text()}`);
  }

  const after = await getCollection(token, collectionArg);
  const added = after.fields.filter((f) => !before.fields.some((b) => b.name === f.name));
  const removed = before.fields.filter((f) => !after.fields.some((a) => a.name === f.name));
  const changed = after.fields.filter((a) => {
    const b = before.fields.find((x) => x.name === a.name);
    return b && JSON.stringify(b) !== JSON.stringify(a);
  });

  console.log(`\nadded:   ${added.map((f) => `${f.name} (${f.type})`).join(", ") || "(none)"}`);
  console.log(`removed: ${removed.map((f) => f.name).join(", ") || "(none)"}`);
  console.log(`changed: ${changed.map((f) => f.name).join(", ") || "(none)"}`);

  if (added.length !== 1 || removed.length > 0 || changed.length > 0) {
    throw new Error("UNEXPECTED schema drift — inspect before proceeding.");
  }
  console.log(`\nOK: ${nameArg} added, nothing else moved.`);
}

void main().catch((err: unknown) => {
  console.error(`FAILED: ${err instanceof Error ? err.message : String(err)}`);
  process.exit(1);
});