import { formatBytes } from "@add-ideas/toolbox-helpers";
import { ArchivePolicyError } from "./errors";

export const ARCHIVE_LIMITS = Object.freeze({
  maxSourceBytes: 512 * 1024 * 1024,
  maxEntries: 20_000,
  maxDisplayedEntries: 5_000,
  maxExpandedBytes: 512 * 1024 * 1024,
  maxEntryBytes: 256 * 1024 * 1024,
  maxCompressionRatio: 200,
  maxPathBytes: 4_096,
  maxPathSegments: 64,
  maxSegmentBytes: 255,
  maxPreviewTextBytes: 2 * 1024 * 1024,
  maxPreviewHexBytes: 128 * 1024,
  maxPreviewImageBytes: 24 * 1024 * 1024,
  maxPreviewImagePixels: 40_000_000,
  maxPreviewImageEdge: 32_768,
  maxCreateFiles: 5_000,
  maxCreateBytes: 512 * 1024 * 1024,
  maxPaxHeaderBytes: 1024 * 1024,
  maxGzipMembers: 256,
  maxPasswordBytes: 1_024,
  maxStructuralHeaderBytes: 16 * 1024 * 1024,
  maxArchiveHeaderBlocks: 40_000,
});

export function assertFiniteSafeInteger(value: number, label: string): void {
  if (!Number.isSafeInteger(value) || value < 0) {
    throw new ArchivePolicyError(
      "INVALID_SIZE",
      `${label} is not a safe non-negative byte count.`,
    );
  }
}

export function assertSourceSize(file: Blob): void {
  if (file.size > ARCHIVE_LIMITS.maxSourceBytes) {
    throw new ArchivePolicyError(
      "SOURCE_TOO_LARGE",
      `Archive exceeds the ${formatBytes(ARCHIVE_LIMITS.maxSourceBytes)} source limit.`,
    );
  }
}

export { formatBytes };

export function throwIfAborted(signal?: AbortSignal): void {
  if (signal?.aborted) {
    throw signal.reason instanceof Error
      ? signal.reason
      : new DOMException("Operation cancelled.", "AbortError");
  }
}