// Based on https://github.com/npm/cli/blob/latest/lib/utils/cmd-list.js

import abbrev from "abbrev";

const commands = [
  "access",
  "adduser",
  "audit",
  "bugs",
  "cache",
  "ci",
  "completion",
  "config",
  "dedupe",
  "deprecate",
  "diff",
  "dist-tag",
  "docs",
  "doctor",
  "edit",
  "exec",
  "explain",
  "explore",
  "find-dupes",
  "fund",
  "get",
  "help",
  "help-search",
  "init",
  "install",
  "install-ci-test",
  "install-test",
  "link",
  "ll",
  "login",
  "logout",
  "ls",
  "org",
  "outdated",
  "owner",
  "pack",
  "ping",
  "pkg",
  "prefix",
  "profile",
  "prune",
  "publish",
  "query",
  "rebuild",
  "repo",
  "restart",
  "root",
  "run",
  "sbom",
  "search",
  "set",
  "shrinkwrap",
  "star",
  "stars",
  "start",
  "stop",
  "team",
  "test",
  "token",
  "undeprecate",
  "uninstall",
  "unpublish",
  "unstar",
  "update",
  "version",
  "view",
  "whoami",
];

// These must resolve to an entry in commands
const aliases = {
  // aliases
  author: "owner",
  home: "docs",
  issues: "bugs",
  info: "view",
  show: "view",
  find: "search",
  add: "install",
  unlink: "uninstall",
  remove: "uninstall",
  rm: "uninstall",
  r: "uninstall",

  // short names for common things
  un: "uninstall",
  rb: "rebuild",
  list: "ls",
  ln: "link",
  create: "init",
  i: "install",
  it: "install-test",
  cit: "install-ci-test",
  up: "update",
  c: "config",
  s: "search",
  se: "search",
  tst: "test",
  t: "test",
  ddp: "dedupe",
  v: "view",
  "run-script": "run",
  "clean-install": "ci",
  "clean-install-test": "install-ci-test",
  x: "exec",
  why: "explain",
  la: "ll",
  verison: "version",
  ic: "ci",

  // typos
  innit: "init",
  // manually abbrev so that install-test doesn't make insta stop working
  in: "install",
  ins: "install",
  inst: "install",
  insta: "install",
  instal: "install",
  isnt: "install",
  isnta: "install",
  isntal: "install",
  isntall: "install",
  "install-clean": "ci",
  "isntall-clean": "ci",
  hlep: "help",
  "dist-tags": "dist-tag",
  upgrade: "update",
  udpate: "update",
  rum: "run",
  sit: "install-ci-test",
  urn: "run",
  ogr: "org",
  "add-user": "adduser",
};

export function deref(c) {
  if (!c) {
    return;
  }

  // Translate camelCase to snake-case (i.e. installTest to install-test)
  if (c.match(/[A-Z]/)) {
    c = c.replace(/([A-Z])/g, (m) => "-" + m.toLowerCase());
  }

  // if they asked for something exactly we are done
  if (commands.includes(c)) {
    return c;
  }

  // if they asked for a direct alias
  if (aliases[c]) {
    return aliases[c];
  }

  const abbrevs = abbrev(commands.concat(Object.keys(aliases)));

  // first deref the abbrev, if there is one
  // then resolve any aliases
  // so `npm install-cl` will resolve to `install-clean` then to `ci`
  let a = abbrevs[c];
  while (aliases[a]) {
    a = aliases[a];
  }
  return a;
}