// Copyright 2018-2026 the Deno authors. MIT license.
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

(function () {
const { core, primordials } = __bootstrap;
const { Buffer } = core.loadExtScript("ext:deno_node/internal/buffer.mjs");
const { uvException } = core.loadExtScript("ext:deno_node/internal/errors.ts");
const { writeBuffer } = core.loadExtScript(
  "ext:deno_node/internal_binding/node_file.ts",
);

const { RegExpPrototypeTest, SafeRegExp, Symbol } = primordials;

// IPv4 Segment
const v4Seg = "(?:[0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])";
const v4Str = `(${v4Seg}[.]){3}${v4Seg}`;
const IPv4Reg = new SafeRegExp(`^${v4Str}$`);

// IPv6 Segment
const v6Seg = "(?:[0-9a-fA-F]{1,4})";
const IPv6Reg = new SafeRegExp(
  "^(" +
    `(?:${v6Seg}:){7}(?:${v6Seg}|:)|` +
    `(?:${v6Seg}:){6}(?:${v4Str}|:${v6Seg}|:)|` +
    `(?:${v6Seg}:){5}(?::${v4Str}|(:${v6Seg}){1,2}|:)|` +
    `(?:${v6Seg}:){4}(?:(:${v6Seg}){0,1}:${v4Str}|(:${v6Seg}){1,3}|:)|` +
    `(?:${v6Seg}:){3}(?:(:${v6Seg}){0,2}:${v4Str}|(:${v6Seg}){1,4}|:)|` +
    `(?:${v6Seg}:){2}(?:(:${v6Seg}){0,3}:${v4Str}|(:${v6Seg}){1,5}|:)|` +
    `(?:${v6Seg}:){1}(?:(:${v6Seg}){0,4}:${v4Str}|(:${v6Seg}){1,6}|:)|` +
    `(?::((?::${v6Seg}){0,5}:${v4Str}|(?::${v6Seg}){1,7}|:))` +
    ")(%[0-9a-zA-Z-.:]{1,})?$",
);

function isIPv4(ip) {
  return RegExpPrototypeTest(IPv4Reg, ip);
}

function isIPv6(ip) {
  return RegExpPrototypeTest(IPv6Reg, ip);
}

function isIP(ip) {
  if (isIPv4(ip)) {
    return 4;
  }
  if (isIPv6(ip)) {
    return 6;
  }

  return 0;
}

function getIPFamily(ip) {
  if (isIPv4(ip)) {
    return "IPv4";
  }
  if (isIPv6(ip)) {
    return "IPv6";
  }
  return undefined;
}

function makeSyncWrite(fd) {
  return function (chunk, enc, cb) {
    if (enc !== "buffer") {
      chunk = Buffer.from(chunk, enc);
    }

    this._handle.bytesWritten += chunk.length;

    const ctx = {};
    writeBuffer(fd, chunk, 0, chunk.length, null, ctx);

    if (ctx.errno !== undefined) {
      const ex = uvException(ctx);
      ex.errno = ctx.errno;

      return cb(ex);
    }

    cb();
  };
}

const kReinitializeHandle = Symbol("kReinitializeHandle");
const kSetNoDelay = Symbol("kSetNoDelay");
const kSetKeepAlive = Symbol("kSetKeepAlive");
const kSetKeepAliveInitialDelay = Symbol("kSetKeepAliveInitialDelay");
const normalizedArgsSymbol = Symbol("normalizedArgs");

return {
  isIPv4,
  isIPv6,
  isIP,
  getIPFamily,
  makeSyncWrite,
  kReinitializeHandle,
  kSetKeepAlive,
  kSetKeepAliveInitialDelay,
  kSetNoDelay,
  normalizedArgsSymbol,
};
})();
