import {
  MaterialUploadRequestError,
  MaterialUploadRequestLimiter,
} from '@/lib/material-upload-request-guard'
import { MultipartRequestError } from '@/lib/multipart-request-guard'

const MEBIBYTE = 1024 * 1024

/**
 * requestBytes intentionally include multipart framing headroom. File limits
 * remain the business boundary and must be rechecked after formData parsing.
 */
export const MULTIPART_ROUTE_LIMITS = Object.freeze({
  legacyS3RequestBytes: 102 * MEBIBYTE,
  legacyS3FileBytes: 100 * MEBIBYTE,
  previewRequestBytes: 52 * MEBIBYTE,
  previewFileBytes: 50 * MEBIBYTE,
  skuArchiveRequestBytes: 130 * MEBIBYTE,
  skuArchiveFileBytes: 128 * MEBIBYTE,
  avatarRequestBytes: 6 * MEBIBYTE,
  avatarFileBytes: 5 * MEBIBYTE,
  materialUpdateRequestBytes: 10 * MEBIBYTE,
  materialUpdatePreviewBytes: 8 * MEBIBYTE,
  logoRequestBytes: 6 * MEBIBYTE,
  logoFileBytes: 5 * MEBIBYTE,
  psdRequestBytes: 130 * MEBIBYTE,
  whiteBackgroundRequestBytes: 105 * MEBIBYTE,
})

// This limiter starts before formData(), so at most two large parsed multipart
// bodies can coexist. CPU-heavy image/PDF work still has its own single slot.
export const boundedMultipartRequestLimiter = new MaterialUploadRequestLimiter(2, 16)

export function getBoundedMultipartFailure(error: unknown): {
  message: string
  status: number
  code: string
  retryAfterSeconds?: number
} | null {
  if (error instanceof MultipartRequestError || error instanceof MaterialUploadRequestError) {
    return {
      message: error.message,
      status: error.status,
      code: error.code,
      ...('retryAfterSeconds' in error && error.retryAfterSeconds
        ? { retryAfterSeconds: error.retryAfterSeconds }
        : {}),
    }
  }
  return null
}