/* eslint-disable */
/**
 * Migration: add an index on `order_items.item_status`.
 *
 * Why this exists
 * ───────────────
 * The /orders page's tab badges ("New (12)", "Processing (4)") and
 * its server-side tab filter both run queries of the form
 * `item_status = "pending" || item_status = "approval_needed" || ...`
 * on the `order_items` collection. With ~18k items and no index on
 * `item_status`, every load is a full table scan — the single biggest
 * cost on the orders page after the deep expand on the orders
 * collection itself.
 *
 * Adding the index makes these queries O(log n) B-tree lookups. The
 * page-load budget drops from seconds to sub-second on the cold path
 * (realtime refetches benefit even more because the tab-counts cache
 * is bypassed for them).
 *
 * Schema
 * ──────
 *   order_items.item_status  select (existing field, no schema change)
 *
 * The index is non-unique (the same status appears on many rows).
 *
 * Idempotent — safe to re-run. The migration checks for the index
 * before adding it; subsequent runs print "already present, skipping."
 *
 * Run with:
 *   npx tsx scripts/migrations/2026-08-04-add-order-items-item-status-index.ts
 */
import PocketBase from "pocketbase";
import { readFileSync } from "node:fs";
import { resolve } from "node:path";

function loadEnvFile(name: string) {
  try {
    const raw = readFileSync(resolve(process.cwd(), name), "utf8");
    for (const line of raw.split("\n")) {
      const trimmed = line.trim();
      if (!trimmed || trimmed.startsWith("#")) continue;
      const m = trimmed.match(/^([A-Z0-9_]+)\s*=\s*(.+)$/i);
      if (m && !process.env[m[1]]) {
        process.env[m[1]] = m[2].replace(/^["']|["']$/g, "").trim();
      }
    }
  } catch {
    // missing file — fine
  }
}
loadEnvFile(".env");
loadEnvFile(".env.local");

async function main() {
  const url = process.env.NEXT_PUBLIC_POCKETBASE_URL;
  const email = process.env.PB_ADMIN_EMAIL;
  const password = process.env.PB_ADMIN_PASSWORD;

  if (!url || !email || !password) {
    throw new Error(
      "Missing NEXT_PUBLIC_POCKETBASE_URL / PB_ADMIN_EMAIL / PB_ADMIN_PASSWORD in env",
    );
  }

  const pb = new PocketBase(url);
  await pb.admins.authWithPassword(email, password);

  const collection = await pb.collections.getOne("order_items");
  const INDEX_NAME = "idx_oi_item_status";
  const INDEX_SQL = `CREATE INDEX \`${INDEX_NAME}\` ON \`order_items\` (\`item_status\`)`;

  const existing = (collection.indexes || []) as string[];
  if (existing.includes(INDEX_SQL)) {
    console.log("order_items.item_status index already present, skipping.");
    return;
  }

  await pb.collections.update(collection.id, {
    indexes: [...existing, INDEX_SQL],
  });

  console.log("Added order_items.item_status index (idx_oi_item_status).");
  console.log("Run /orders in the browser — the initial load should be visibly faster.");
}

main().catch((err) => {
  console.error(err);
  process.exit(1);
});