import { materializePiDistribution } from "./materialize-pi-distribution.mjs";
import { materializePinnedCursorDistribution } from "./materialize-cursor-distribution.mjs";
const CANDIDATES = new Set(["cursor", "copilot", "pi"]);

export function parseProviderPackArguments(args) {
  let output;
  const candidates = [];
  for (const value of args.filter(value => value !== "--")) {
    if (value.startsWith("--candidate-providers=")) {
      for (const provider of value.slice("--candidate-providers=".length).split(",").filter(Boolean)) {
        if (!CANDIDATES.has(provider) || candidates.includes(provider)) throw new Error("Unknown or duplicate candidate provider");
        candidates.push(provider);
      }
    } else if (value.startsWith("--") || output !== undefined) throw new Error("Invalid provider-pack arguments");
    else output = value;
  }
  return { output, candidates };
}

/** Closed source-owned builder registry; provider branches add their exact pins. */
export async function materializeCandidateProviderPack({ provider, outputRoot }) {
  if (!CANDIDATES.has(provider)) throw new Error("Unknown candidate provider");
  if (provider === "pi") return materializePiDistribution({ outputRoot });
  if (provider === "copilot") {
    const { buildPinnedCopilotDistribution } = await import("./build-copilot-distribution.mjs");
    return buildPinnedCopilotDistribution({ outputRoot });
  }
  if (provider === "cursor") {
    const result = await materializePinnedCursorDistribution({ destination: outputRoot });
    return { version: result.version,
      profileDigest: "sha256:a76ad26878a3b3328154901563cbda857e53583e4e01787f35a797992ef76162",
      closureDigest: `sha256:${result.closureSha256}` };
  }
  throw new Error(`The ${provider} candidate distribution builder is not included in this source revision`);
}