import { existsSync } from "node:fs";
import path from "node:path";

export function pythonCandidates(cwd: string, packageRoot: string, platform = process.platform): string[] {
  const pathApi = platform === "win32" ? path.win32 : path.posix;
  const executable = platform === "win32" ? pathApi.join("Scripts", "python.exe") : pathApi.join("bin", "python");
  return [
    pathApi.join(cwd, ".venv", executable),
    pathApi.join(packageRoot, ".venv", executable),
  ];
}

export function pythonBin(cwd: string, packageRoot: string): string {
  return pythonCandidates(cwd, packageRoot).find((candidate) => existsSync(candidate)) ?? (process.platform === "win32" ? "python" : "python3");
}