import { readFileSync } from "node:fs";

import { birthSkyFromEngine, type BirthSkyOk, type BirthSkyPhase } from "../src/lib/birth-sky/contract.ts";

/** Real engine responses (scripts/generate_birth_sky_golden.py), fictional sample birth. */
export const birthSkyGolden = JSON.parse(
  readFileSync(new URL("./fixtures/birth-sky-golden.json", import.meta.url), "utf8"),
) as { times: Record<BirthSkyPhase, string>; responses: Record<BirthSkyPhase, Record<string, unknown>> };

export function goldenSky(phase: BirthSkyPhase, timeBasis: BirthSkyOk["timeBasis"] = "reported"): BirthSkyOk {
  const sky = birthSkyFromEngine(birthSkyGolden.responses[phase], timeBasis);
  if (!sky) throw new Error(`golden ${phase} does not satisfy the contract`);
  return sky;
}