import test from "node:test";
import assert from "node:assert/strict";
import { findTransponderConflict } from "../src/driver_profile_logic.js";

// Regression coverage for a real scenario the user described: a driver registered with the
// wrong transponder number by mistake - one that's actually assigned to a completely
// different person (a driver in another class). Before this, nothing warned about it; the
// only symptom was that driver's laps silently never registering during their heat.
test("findTransponderConflict flags a transponder already used by a driver from a different profile", () => {
  const drivers = [
    { id: "d1", name: "Erik Andersson", transponder: "1000001", profileId: "p1" },
    { id: "d2", name: "Marcus Dahl", transponder: "1000009", profileId: "p2" },
  ];
  const conflict = findTransponderConflict(drivers, { transponder: "1000009", profileId: "p1" });
  assert.equal(conflict?.id, "d2");
});

test("findTransponderConflict does not flag the same person's own multi-class entries (same profile)", () => {
  const drivers = [
    { id: "d1", name: "Erik Andersson", transponder: "1000001", profileId: "p1" },
    { id: "d2", name: "Erik Andersson", transponder: "1000001", profileId: "p1" },
  ];
  const conflict = findTransponderConflict(drivers, { transponder: "1000001", profileId: "p1" });
  assert.equal(conflict, null);
});

test("findTransponderConflict excludes the driver being edited from its own conflict check", () => {
  const drivers = [
    { id: "d1", name: "Erik Andersson", transponder: "1000001", profileId: "p1" },
  ];
  const conflict = findTransponderConflict(drivers, { transponder: "1000001", profileId: "p1", excludeDriverId: "d1" });
  assert.equal(conflict, null);
});

test("findTransponderConflict is a no-op for an empty transponder", () => {
  const drivers = [{ id: "d1", name: "Erik Andersson", transponder: "", profileId: "p1" }];
  assert.equal(findTransponderConflict(drivers, { transponder: "", profileId: "p2" }), null);
});