import "dotenv/config";

/**
 * tenantTransaction(): atomic multi-step writes for one tenant.
 * Runs in the mode given by RLS_ENFORCED (owner path by default). The runner executes this
 * script once as-is; to verify the RLS path run: RLS_ENFORCED=true npx tsx scripts/test-tenant-transaction.ts
 * (requires craftvia_app LOGIN, see test-rls-enforcement.ts — otherwise that mode is skipped).
 *  (1) commit: two writes inside → both visible afterwards
 *  (2) rollback: two writes, then throw → nothing visible
 *  (3) a write for another tenant inside the transaction → rejected, whole tx rolled back
 *  (4) nested tenantTransaction joins the outer transaction (rollback covers both)
 */

let failures = 0;
function check(name: string, cond: boolean, detail?: unknown) {
  if (cond) console.log(`  ✓ ${name}`);
  else {
    failures++;
    console.log(`  ✗ ${name}`, detail ?? "");
  }
}

async function main() {
  const { prisma, dbForTenant, tenantTransaction, RLS_ENFORCED } = await import("../src/server/db");
  console.log(`Modus: ${RLS_ENFORCED ? "RLS (craftvia_app)" : "Owner"}`);

  const stamp = Date.now();
  const a = await prisma.tenant.create({ data: { name: "ZZ Tx A", slug: `zz-tx-a-${stamp}` } });
  const b = await prisma.tenant.create({ data: { name: "ZZ Tx B", slug: `zz-tx-b-${stamp}` } });
  const dbA = dbForTenant(a.id);

  const countA = () => prisma.numberSequence.count({ where: { tenantId: a.id } });

  try {
    // (1) commit
    await tenantTransaction(dbA, a.id, async (tx) => {
      await tx.numberSequence.create({ data: { tenantId: a.id, key: "customer", prefix: "K-" } });
      await tx.numberSequence.create({ data: { tenantId: a.id, key: "work_order", prefix: "A-" } });
    });
    check("(1) commit: both rows persisted", (await countA()) === 2, await countA());

    // (2) rollback
    try {
      await tenantTransaction(dbA, a.id, async (tx) => {
        await tx.numberSequence.create({ data: { tenantId: a.id, key: "report", prefix: "B-" } });
        await tx.numberSequence.create({ data: { tenantId: a.id, key: "emergency", prefix: "N-" } });
        throw new Error("boom");
      });
      check("(2) rollback: error propagated", false);
    } catch (err) {
      check("(2) rollback: error propagated", (err as Error).message === "boom", (err as Error).message);
    }
    check("(2) rollback: no rows from failed tx", (await countA()) === 2, await countA());

    // (3) foreign tenant inside the tx
    try {
      await tenantTransaction(dbA, a.id, async (tx) => {
        await tx.numberSequence.create({ data: { tenantId: a.id, key: "report", prefix: "B-" } });
        const foreign = await prisma.numberSequence.create({ data: { tenantId: b.id, key: "customer", prefix: "K-" } });
        await tx.numberSequence.update({ where: { id: foreign.id }, data: { prefix: "HACK-" } });
      });
      check("(3) foreign update rejected", false);
    } catch {
      check("(3) foreign update rejected", true);
    }
    const foreignRow = await prisma.numberSequence.findFirst({ where: { tenantId: b.id } });
    check("(3) foreign row unchanged", foreignRow?.prefix === "K-", foreignRow?.prefix);
    check("(3) own write of failed tx rolled back", (await countA()) === 2, await countA());

    // (4) nested join
    try {
      await tenantTransaction(dbA, a.id, async (tx) => {
        await tx.numberSequence.create({ data: { tenantId: a.id, key: "report", prefix: "B-" } });
        await tenantTransaction(tx, a.id, async (inner) => {
          await inner.numberSequence.create({ data: { tenantId: a.id, key: "emergency", prefix: "N-" } });
        });
        throw new Error("outer boom");
      });
    } catch {
      /* expected */
    }
    check("(4) nested writes rolled back with outer tx", (await countA()) === 2, await countA());
  } finally {
    await prisma.numberSequence.deleteMany({ where: { tenantId: { in: [a.id, b.id] } } });
    await prisma.auditLog.deleteMany({ where: { tenantId: { in: [a.id, b.id] } } });
    await prisma.tenant.deleteMany({ where: { id: { in: [a.id, b.id] } } });
    await prisma.$disconnect();
  }

  console.log(failures ? `\n${failures} Fehler` : "\nOK");
  process.exit(failures ? 1 : 0);
}

main().catch((err) => {
  const msg = String((err as Error)?.message ?? err);
  if (/craftvia_app|password authentication|permission denied for role/i.test(msg)) {
    console.log(`⚠ ÜBERSPRUNGEN: RLS-Verbindung nicht möglich (${msg.split("\n")[0]})`);
    process.exit(0);
  }
  console.error(err);
  process.exit(1);
});