export class PlatformError extends Error {
  constructor(message, { code = 'PLATFORM_ERROR', status = 500, details = null, expose = false, cause = undefined } = {}) {
    super(String(message || 'Unbekannter Plattformfehler'), { cause });
    this.name = 'PlatformError';
    this.code = String(code || 'PLATFORM_ERROR');
    this.status = Number.isInteger(status) ? status : 500;
    this.details = details;
    this.expose = Boolean(expose || this.status < 500);
  }
}

export function normalizePlatformError(error) {
  if (error instanceof PlatformError) return error;
  return new PlatformError(error?.message || 'Interner Serverfehler', {
    code: error?.code || 'INTERNAL_ERROR',
    status: Number.isInteger(error?.status) ? error.status : 500,
    details: error?.details || null,
    expose: Boolean(error?.expose),
    cause: error,
  });
}

export function platformErrorPayload(error, requestId = null) {
  const normalized = normalizePlatformError(error);
  return {
    error: normalized.expose ? normalized.message : 'Interner Serverfehler',
    code: normalized.code,
    request_id: requestId || null,
    ...(normalized.expose && normalized.details ? { details: normalized.details } : {}),
  };
}