let alphabet = '';

for (let i = 0; i < 26; i++) {
  alphabet = alphabet.concat(String.fromCharCode(97 + i));
}

const i18nConstants = [
  // reserved paths for localizations
  'afrikaans',
  'arabic',
  'bengali',
  'catalan',
  'chinese',
  'czech',
  'danish',
  'dutch',
  'espanol',
  'finnish',
  'french',
  'german',
  'greek',
  'hebrew',
  'hindi',
  'hungarian',
  'italian',
  'japanese',
  'korean',
  'norwegian',
  'polish',
  'portuguese',
  'romanian',
  'russian',
  'serbian',
  'spanish',
  'swahili',
  'swedish',
  'turkish',
  'ukrainian',
  'vietnamese'
];

let blocklist = [
  ...alphabet.split(''),
  ...i18nConstants,
  'about',
  'academic-honesty',
  'account',
  'agile',
  'all-stories',
  'api',
  'backend-challenge-completed',
  'bonfire',
  'cats.json',
  'challenge-completed',
  'challenge',
  'challenges',
  'chat',
  'code-of-conduct',
  'coding-bootcamp-cost-calculator',
  'completed-bonfire',
  'completed-challenge',
  'completed-field-guide',
  'completed-zipline-or-basejump',
  'copyright-policy',
  'copyright',
  'deprecated-signin',
  'donate',
  'email-signin',
  'events',
  'explorer',
  'external',
  'field-guide',
  'forgot',
  'forum',
  'get-help',
  'get-pai',
  'guide',
  'how-nonprofit-projects-work',
  'internal',
  'jobs-form',
  'jobs',
  'learn-to-code',
  'learn',
  'login',
  'logout',
  'map',
  'modern-challenge-completed',
  'news',
  'nonprofit-project-instructions',
  'nonprofits-form',
  'nonprofits',
  'open-api',
  'passwordless-change',
  'pmi-acp-agile-project-managers-form',
  'pmi-acp-agile-project-managers',
  'privacy-policy',
  'privacy',
  'profile',
  'project-completed',
  'reset',
  'services',
  'shop',
  'signin',
  'signout',
  'signup',
  'sitemap.xml',
  'software-resources-for-nonprofits',
  'sponsors',
  'stories',
  'support',
  'terms-of-service',
  'terms',
  'the-fastest-web-page-on-the-internet',
  'twitch',
  'unsubscribe',
  'unsubscribed',
  'update-my-portfolio',
  'update-my-profile-ui',
  'update-my-theme',
  'update-my-username',
  'user',
  'username',
  'wiki',
  // some more names from https://github.com/marteinn/The-Big-Username-Blacklist-JS/blob/master/src/list.js
  '.htaccess',
  '.htpasswd',
  '.well-known',
  '400',
  '401',
  '403',
  '404',
  '405',
  '406',
  '407',
  '408',
  '409',
  '410',
  '411',
  '412',
  '413',
  '414',
  '415',
  '416',
  '417',
  '421',
  '422',
  '423',
  '424',
  '426',
  '428',
  '429',
  '431',
  '500',
  '501',
  '502',
  '503',
  '504',
  '505',
  '506',
  '507',
  '508',
  '509',
  '510',
  '511',
  'about',
  'about-us',
  'abuse',
  'access',
  'account',
  'accounts',
  'ad',
  'add',
  'admin',
  'administration',
  'administrator',
  'ads',
  'advertise',
  'advertising',
  'aes128-ctr',
  'aes128-gcm',
  'aes192-ctr',
  'aes256-ctr',
  'aes256-gcm',
  'affiliate',
  'affiliates',
  'ajax',
  'alert',
  'alerts',
  'alpha',
  'amp',
  'analytics',
  'api',
  'app',
  'apps',
  'asc',
  'assets',
  'atom',
  'auth',
  'authentication',
  'authorize',
  'autoconfig',
  'autodiscover',
  'avatar',
  'backup',
  'banner',
  'banners',
  'beta',
  'billing',
  'billings',
  'blog',
  'blogs',
  'board',
  'bookmark',
  'bookmarks',
  'broadcasthost',
  'business',
  'buy',
  'cache',
  'calendar',
  'campaign',
  'captcha',
  'careers',
  'cart',
  'cas',
  'categories',
  'category',
  'cdn',
  'cgi',
  'cgi-bin',
  'chacha20-poly1305',
  'change',
  'channel',
  'channels',
  'chart',
  'chat',
  'checkout',
  'clear',
  'client',
  'close',
  'cms',
  'com',
  'comment',
  'comments',
  'community',
  'compare',
  'compose',
  'config',
  'connect',
  'contact',
  'contest',
  'cookies',
  'copy',
  'copyright',
  'count',
  'create',
  'crossdomain.xml',
  'css',
  'curve25519-sha256',
  'customer',
  'customers',
  'customize',
  'dashboard',
  'db',
  'deals',
  'debug',
  'delete',
  'desc',
  'destroy',
  'dev',
  'developer',
  'developers',
  'diffie-hellman-group-exchange-sha256',
  'diffie-hellman-group14-sha1',
  'disconnect',
  'discuss',
  'dns',
  'dns0',
  'dns1',
  'dns2',
  'dns3',
  'dns4',
  'docs',
  'documentation',
  'domain',
  'download',
  'downloads',
  'downvote',
  'draft',
  'drop',
  'ecdh-sha2-nistp256',
  'ecdh-sha2-nistp384',
  'ecdh-sha2-nistp521',
  'edit',
  'editor',
  'email',
  'enterprise',
  'error',
  'errors',
  'event',
  'events',
  'example',
  'exception',
  'exit',
  'explore',
  'export',
  'extensions',
  'false',
  'family',
  'faq',
  'faqs',
  'favicon.ico',
  'features',
  'feed',
  'feedback',
  'feeds',
  'file',
  'files',
  'filter',
  'follow',
  'follower',
  'followers',
  'following',
  'fonts',
  'forgot',
  'forgot-password',
  'forgotpassword',
  'form',
  'forms',
  'forum',
  'forums',
  'friend',
  'friends',
  'ftp',
  'get',
  'git',
  'go',
  'group',
  'groups',
  'guest',
  'guidelines',
  'guides',
  'head',
  'header',
  'help',
  'hide',
  'hmac-sha',
  'hmac-sha1',
  'hmac-sha1-etm',
  'hmac-sha2-256',
  'hmac-sha2-256-etm',
  'hmac-sha2-512',
  'hmac-sha2-512-etm',
  'home',
  'host',
  'hosting',
  'hostmaster',
  'htpasswd',
  'http',
  'httpd',
  'https',
  'humans.txt',
  'icons',
  'images',
  'imap',
  'img',
  'import',
  'index',
  'info',
  'insert',
  'investors',
  'invitations',
  'invite',
  'invites',
  'invoice',
  'is',
  'isatap',
  'issues',
  'it',
  'jobs',
  'join',
  'js',
  'json',
  'keybase.txt',
  'learn',
  'legal',
  'license',
  'licensing',
  'like',
  'limit',
  'live',
  'load',
  'local',
  'localdomain',
  'localhost',
  'lock',
  'login',
  'logout',
  'lost-password',
  'mail',
  'mail0',
  'mail1',
  'mail2',
  'mail3',
  'mail4',
  'mail5',
  'mail6',
  'mail7',
  'mail8',
  'mail9',
  'mailer-daemon',
  'mailerdaemon',
  'map',
  'marketing',
  'marketplace',
  'master',
  'me',
  'media',
  'member',
  'members',
  'message',
  'messages',
  'metrics',
  'mis',
  'mobile',
  'moderator',
  'modify',
  'more',
  'mx',
  'my',
  'net',
  'network',
  'new',
  'news',
  'newsletter',
  'newsletters',
  'next',
  'nil',
  'no-reply',
  'nobody',
  'noc',
  'none',
  'noreply',
  'notification',
  'notifications',
  'ns',
  'ns0',
  'ns1',
  'ns2',
  'ns3',
  'ns4',
  'ns5',
  'ns6',
  'ns7',
  'ns8',
  'ns9',
  'null',
  'oauth',
  'oauth2',
  'offer',
  'offers',
  'online',
  'openid',
  'order',
  'orders',
  'overview',
  'owner',
  'page',
  'pages',
  'partners',
  'passwd',
  'password',
  'pay',
  'payment',
  'payments',
  'photo',
  'photos',
  'pixel',
  'plans',
  'plugins',
  'policies',
  'policy',
  'pop',
  'pop3',
  'popular',
  'portfolio',
  'post',
  'postfix',
  'postmaster',
  'poweruser',
  'preferences',
  'premium',
  'press',
  'previous',
  'pricing',
  'print',
  'privacy',
  'privacy-policy',
  'private',
  'prod',
  'product',
  'production',
  'profile',
  'profiles',
  'project',
  'projects',
  'public',
  'purchase',
  'put',
  'quota',
  'redirect',
  'reduce',
  'refund',
  'refunds',
  'register',
  'registration',
  'remove',
  'replies',
  'reply',
  'report',
  'request',
  'request-password',
  'reset',
  'reset-password',
  'response',
  'return',
  'returns',
  'review',
  'reviews',
  'robots.txt',
  'root',
  'rootuser',
  'rsa-sha2-2',
  'rsa-sha2-512',
  'rss',
  'rules',
  'sales',
  'save',
  'script',
  'sdk',
  'search',
  'secure',
  'security',
  'select',
  'services',
  'session',
  'sessions',
  'settings',
  'setup',
  'share',
  'shift',
  'shop',
  'signin',
  'signup',
  'site',
  'sitemap',
  'sites',
  'smtp',
  'sort',
  'source',
  'sql',
  'ssh',
  'ssh-rsa',
  'ssl',
  'ssladmin',
  'ssladministrator',
  'sslwebmaster',
  'stage',
  'staging',
  'stat',
  'static',
  'statistics',
  'stats',
  'status',
  'store',
  'style',
  'styles',
  'stylesheet',
  'stylesheets',
  'subdomain',
  'subscribe',
  'sudo',
  'super',
  'superuser',
  'support',
  'survey',
  'sync',
  'sysadmin',
  'system',
  'tablet',
  'tag',
  'tags',
  'team',
  'telnet',
  'terms',
  'terms-of-use',
  'test',
  'testimonials',
  'theme',
  'themes',
  'today',
  'tools',
  'topic',
  'topics',
  'tour',
  'training',
  'translate',
  'translations',
  'trending',
  'trial',
  'true',
  'umac-128',
  'umac-128-etm',
  'umac-64',
  'umac-64-etm',
  'undefined',
  'unfollow',
  'unlike',
  'unsubscribe',
  'update',
  'upgrade',
  'usenet',
  'user',
  'username',
  'users',
  'uucp',
  'var',
  'verify',
  'video',
  'view',
  'void',
  'vote',
  'webmail',
  'webmaster',
  'website',
  'widget',
  'widgets',
  'wiki',
  'wpad',
  'write',
  'www',
  'www-data',
  'www1',
  'www2',
  'www3',
  'www4',
  'you',
  'yourname',
  'yourusername',
  'zlib'
];

exports.blocklistedUsernames = [...new Set(blocklist)];
exports.i18nConstants = i18nConstants;