import { existsSync } from 'node:fs';
import { dirname, resolve, relative } from 'node:path';

const ENV_FALLBACK_OPTIONS_FN = "() => undefined";
const OPTIONS_IMPORT_IDENTIFIER = "__SENTRY_OPTIONS_CALLBACK__";
const INSTRUMENT_FILE_BASENAME = "instrument.server";
const INSTRUMENT_FILE_EXTENSIONS = ["ts", "mts", "js", "mjs", "cjs"];
function resolveInstrumentFile(entryFilePath) {
  const dir = dirname(entryFilePath);
  for (const ext of INSTRUMENT_FILE_EXTENSIONS) {
    const candidate = resolve(dir, `${INSTRUMENT_FILE_BASENAME}.${ext}`);
    if (existsSync(candidate)) return candidate;
  }
  return void 0;
}
function buildOptionsImport(entryFilePath, instrumentFilePath) {
  let relativePath = relative(dirname(entryFilePath), instrumentFilePath).replace(/\\/g, "/");
  if (!relativePath.startsWith(".")) relativePath = `./${relativePath}`;
  return {
    optionsFn: OPTIONS_IMPORT_IDENTIFIER,
    importStmt: `import ${OPTIONS_IMPORT_IDENTIFIER} from '${relativePath}';
`
  };
}

export { ENV_FALLBACK_OPTIONS_FN, buildOptionsImport, resolveInstrumentFile };
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