import type { SpawnError } from "@uncaged/nerve-workflow-utils";

export function formatSpawnFailure(error: SpawnError): string {
  if (error.kind === "spawn_failed") {
    return `spawn_failed: ${error.message}`;
  }
  if (error.kind === "timeout") {
    return `timeout: stdout=${error.stdout.slice(0, 200)} stderr=${error.stderr.slice(0, 200)}`;
  }
  return `non_zero_exit(${error.exitCode}): stderr=${error.stderr.slice(0, 400)}`;
}

export function errorText(error: SpawnError): string {
  if (error.kind === "spawn_failed") {
    return error.message.toLowerCase();
  }
  if (error.kind === "timeout") {
    return `${error.stdout} ${error.stderr}`.toLowerCase();
  }
  return `${error.stdout} ${error.stderr}`.toLowerCase();
}

export function classifyIssueReaderFailure(error: SpawnError): {
  transientError: boolean;
  failureKind: "transient" | "permanent";
} {
  if (error.kind === "timeout" || error.kind === "spawn_failed") {
    return { transientError: true, failureKind: "transient" };
  }
  const text = errorText(error);
  if (
    text.includes("network") ||
    text.includes("timed out") ||
    text.includes("timeout") ||
    text.includes("connection reset") ||
    text.includes("connection refused") ||
    text.includes("429") ||
    text.includes("500") ||
    text.includes("502") ||
    text.includes("503") ||
    text.includes("504")
  ) {
    return { transientError: true, failureKind: "transient" };
  }
  return { transientError: false, failureKind: "permanent" };
}

export function classifyPublisherFailure(error: SpawnError): "auth_or_network" | "permanent" {
  if (error.kind === "timeout" || error.kind === "spawn_failed") {
    return "auth_or_network";
  }
  const text = errorText(error);
  if (
    text.includes("401") ||
    text.includes("403") ||
    text.includes("auth") ||
    text.includes("token") ||
    text.includes("permission") ||
    text.includes("network") ||
    text.includes("connection") ||
    text.includes("timeout")
  ) {
    return "auth_or_network";
  }
  return "permanent";
}