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// Copyright (c) 2026 Cloudflare, Inc.
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// Licensed under the Apache 2.0 license found in the LICENSE file or at:
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//     https://opensource.org/licenses/Apache-2.0
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import { default as zlibUtil } from 'node-internal:zlib';
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const {
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  CONST_Z_OK,
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  CONST_Z_STREAM_END,
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  CONST_Z_NEED_DICT,
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  CONST_Z_ERRNO,
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  CONST_Z_STREAM_ERROR,
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  CONST_Z_DATA_ERROR,
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  CONST_Z_MEM_ERROR,
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  CONST_Z_BUF_ERROR,
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  CONST_Z_VERSION_ERROR,
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} = zlibUtil;
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const constPrefix = 'CONST_';
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export const constants: Record<string, number> = {};
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Object.defineProperties(
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  constants,
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  Object.fromEntries(
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    // eslint-disable-next-line @typescript-eslint/no-unsafe-argument
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    Object.entries(Object.getPrototypeOf(zlibUtil))
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      .filter(([k]) => k.startsWith(constPrefix))
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      .map(([k, v]) => [
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        k.slice(constPrefix.length),
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        {
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          value: v,
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          writable: false,
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          configurable: false,
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          enumerable: true,
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        },
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      ])
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  )
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);
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// Translation table for return codes.
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const rawCodes: Record<string, number | string> = {
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  Z_OK: CONST_Z_OK,
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  Z_STREAM_END: CONST_Z_STREAM_END,
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  Z_NEED_DICT: CONST_Z_NEED_DICT,
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  Z_ERRNO: CONST_Z_ERRNO,
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  Z_STREAM_ERROR: CONST_Z_STREAM_ERROR,
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  Z_DATA_ERROR: CONST_Z_DATA_ERROR,
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  Z_MEM_ERROR: CONST_Z_MEM_ERROR,
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  Z_BUF_ERROR: CONST_Z_BUF_ERROR,
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  Z_VERSION_ERROR: CONST_Z_VERSION_ERROR,
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};
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for (const key of Object.keys(rawCodes)) {
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  rawCodes[rawCodes[key] as number] = key;
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}
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export const codes = Object.freeze(rawCodes);