export type WorkflowErrorType =
  | "transient"
  | "check_failed"
  | "parameter_error"
  | "config_error"
  | "contract_error"
  | "execution_reverted"
  | "unknown";

export interface WorkflowErrorClassification {
  errorType: WorkflowErrorType;
  retryable: boolean;
}

const messageOf = (error: unknown): string => {
  return error instanceof Error ? error.message : String(error);
};

const matchesAny = (message: string, patterns: RegExp[]): boolean => {
  return patterns.some((pattern) => pattern.test(message));
};

export const classifyWorkflowError = (error: unknown): WorkflowErrorClassification => {
  const message = messageOf(error);

  if (matchesAny(message, [
    /timeout/i,
    /timed out/i,
    /rate limit/i,
    /too many requests/i,
    /\b429\b/,
    /\b503\b/,
    /ECONNRESET/i,
    /ETIMEDOUT/i,
    /EAI_AGAIN/i,
    /header not found/i,
    /missing trie node/i,
    /could not detect network/i,
    /network error/i,
    /connection/i,
  ])) {
    return { errorType: "transient", retryable: true };
  }

  if (matchesAny(message, [
    /Check failed/i,
  ])) {
    return { errorType: "check_failed", retryable: false };
  }

  if (matchesAny(message, [
    /Missing parameters/i,
    /Reference not found/i,
    /must resolve to an array/i,
    /Invalid admin address/i,
    /requires saveAs/i,
    /Duplicate deploy saveAs/i,
  ])) {
    return { errorType: "parameter_error", retryable: false };
  }

  if (matchesAny(message, [
    /Missing config\.yaml/i,
    /Missing hardhat\.config\.ts network/i,
    /cannot be forked/i,
    /no factory address/i,
    /no salt/i,
    /simulation callers?/i,
    /releaseTargetNetworks/i,
    /release-target simulation/i,
  ])) {
    return { errorType: "config_error", retryable: false };
  }

  if (matchesAny(message, [
    /Contract does not expose method/i,
    /missing upgradeToAndCall/i,
    /missing newImplementation/i,
    /Unsupported step kind/i,
  ])) {
    return { errorType: "contract_error", retryable: false };
  }

  if (matchesAny(message, [
    /revert/i,
    /reverted/i,
    /CALL_EXCEPTION/i,
    /transaction failed/i,
    /gate-tool validate failed/i,
  ])) {
    return { errorType: "execution_reverted", retryable: false };
  }

  return { errorType: "unknown", retryable: false };
};