/**
 * One-time backfill script (SCHEMA-03, D-05) — computes and persists
 * `Tender.fingerprint` for every pre-existing row.
 *
 * The TenderSource row backfill itself lives in the migration SQL
 * (20260723120000_add_tender_source/migration.sql) because it's a pure
 * column copy. The fingerprint backfill does NOT belong in SQL: it needs
 * the umlaut/CPV-normalization logic in tender-fingerprint.ts, which is
 * code, not SQL (13-RESEARCH.md "Backfill-Migration").
 *
 * Run once, manually, after the migration has been applied (compiled first
 * — this file uses standard extensionless TS imports, so it must run as
 * built CommonJS, not as a raw .ts file):
 *   pnpm --filter @tessera/api build
 *   DATABASE_URL=... node dist/tenders/backfill-tender-source.js
 *
 * Idempotent: recomputes and overwrites fingerprint for every row it reads,
 * so re-running is safe (same deterministic output for unchanged inputs).
 */
import { PrismaClient, Prisma } from '@prisma/client';
import { tenderFingerprint } from './tender-fingerprint';

async function main(): Promise<void> {
  const prisma = new PrismaClient();
  try {
    const tenders = await prisma.tender.findMany({
      select: {
        id: true,
        title: true,
        buyerName: true,
        cpvDivisions: true,
        deadlineAt: true,
        estimatedValue: true,
      },
    });

    let updated = 0;
    for (const t of tenders) {
      const fingerprint = tenderFingerprint({
        buyerName: t.buyerName,
        title: t.title,
        cpvDivisions: t.cpvDivisions,
        deadlineAt: t.deadlineAt,
        // estimatedValue is Decimal? — convert to number|null before bucketing (T-13-01-03).
        estimatedValue: decimalToNumberOrNull(t.estimatedValue),
      });
      await prisma.tender.update({
        where: { id: t.id },
        data: { fingerprint },
      });
      updated += 1;
    }

    console.log(`backfill-tender-source: fingerprint set on ${updated}/${tenders.length} tenders`);
  } finally {
    await prisma.$disconnect();
  }
}

function decimalToNumberOrNull(v: Prisma.Decimal | null): number | null {
  return v === null ? null : Number(v);
}

main().catch((err) => {
  console.error('backfill-tender-source failed:', err);
  process.exitCode = 1;
});