/**
 * Typed service-layer error carrying an HTTP status so both auth fronts
 * (ext API-key routes and internal session routes) map errors identically.
 */
export class PipelineError extends Error {
  status: number;
  details?: unknown;

  constructor(status: number, message: string, details?: unknown) {
    super(message);
    this.name = "PipelineError";
    this.status = status;
    this.details = details;
  }
}

export function toErrorResponse(err: unknown): { body: { error: string; details?: unknown }; status: number } {
  if (err instanceof PipelineError) {
    return {
      body: { error: err.message, ...(err.details !== undefined ? { details: err.details } : {}) },
      status: err.status,
    };
  }
  console.error("[render-pipeline]", err);
  return { body: { error: "Internal server error" }, status: 500 };
}