import { GraphQLError } from "../erp-api-services/errors.js";
import type { GraphQLServerError } from "../erp-api-services/graphql/types.js";

/**
 * JSON body for POST to MM API `/proxy/graphql` (MachineMetrics GraphQL proxy).
 * Used only by `MMApiClient` (not exported from the public SDK entrypoint).
 */
export function buildMmGraphqlProxyRequestBody(
  operationName: string,
  query: string,
  variables?: Record<string, unknown>
): Record<string, unknown> {
  const body: Record<string, unknown> = { operationName, query };
  if (variables !== undefined && Object.keys(variables).length > 0) {
    body.variables = variables;
  }
  return body;
}

/**
 * GraphQL-over-HTTP often returns **HTTP 200** with a top-level `errors` array and partial or null `data`.
 * Axios treats that as success, so callers must inspect the envelope.
 *
 * @throws {GraphQLError} when `errors` is a non-empty array
 */
export function assertMmGraphqlProxyResponseHasNoErrors(
  response: Record<string, unknown>
): void {
  const errors = response.errors;
  if (Array.isArray(errors) && errors.length > 0) {
    throw new GraphQLError("GraphQL Error", errors as GraphQLServerError[]);
  }
}