import { loadQueueTopologyFromEnv, type QueueTopology } from "@image-platform/queue"

export type WorkerConfig = {
  prefetch: number
  queueTopology: QueueTopology
  rabbitmqUrl: string
}

export function loadWorkerConfig(env: NodeJS.ProcessEnv = process.env): WorkerConfig {
  return {
    prefetch: parsePositiveInteger(env.WORKER_PREFETCH, 2),
    queueTopology: loadQueueTopologyFromEnv(env),
    rabbitmqUrl: env.RABBITMQ_URL ?? "amqp://image:image-password@localhost:5672/image_platform",
  }
}

function parsePositiveInteger(value: string | undefined, fallback: number) {
  if (!value) {
    return fallback
  }

  const parsed = Number.parseInt(value, 10)

  return Number.isSafeInteger(parsed) && parsed > 0 ? parsed : fallback
}