/* jslint node: true */
'use strict';

//  ENiGMA½
const Errors            = require('./enig_error.js').Errors;

//  deps
const paths             = require('path');
const async             = require('async');
const _                 = require('lodash');
const assert            = require('assert');

exports.init                = init;
exports.getDefaultPath      = getDefaultPath;
exports.getDefaultConfig    = getDefaultConfig;

let currentConfiguration = {};

function hasMessageConferenceAndArea(config) {
    assert(_.isObject(config.messageConferences));  //  we create one ourself!

    const nonInternalConfs = Object.keys(config.messageConferences).filter(confTag => {
        return 'system_internal' !== confTag;
    });

    if(0 === nonInternalConfs.length) {
        return false;
    }

    //  :TODO: there is likely a better/cleaner way of doing this

    let result = false;
    _.forEach(nonInternalConfs, confTag => {
        if(_.has(config.messageConferences[confTag], 'areas') &&
            Object.keys(config.messageConferences[confTag].areas) > 0)
        {
            result = true;
            return false;   //  stop iteration
        }
    });

    return result;
}

const ArrayReplaceKeyPaths = [
    'loginServers.ssh.algorithms.kex',
    'loginServers.ssh.algorithms.cipher',
    'loginServers.ssh.algorithms.hmac',
    'loginServers.ssh.algorithms.compress',
];

const ArrayReplaceKeys = [
    'args',
    'sendArgs', 'recvArgs', 'recvArgsNonBatch',
];

function mergeValidateAndFinalize(config, cb) {
    const defaultConfig = getDefaultConfig();

    const arrayReplaceKeyPathsMutable = _.clone(ArrayReplaceKeyPaths);
    const shouldReplaceArray = (arr, key) => {
        if(ArrayReplaceKeys.includes(key)) {
            return true;
        }
        for(let i = 0; i < arrayReplaceKeyPathsMutable.length; ++i) {
            const o = _.get(defaultConfig, arrayReplaceKeyPathsMutable[i]);
            if(_.isEqual(o, arr)) {
                arrayReplaceKeyPathsMutable.splice(i, 1);
                return true;
            }
        }
        return false;
    };

    async.waterfall(
        [
            function mergeWithDefaultConfig(callback) {
                const mergedConfig = _.mergeWith(
                    defaultConfig,
                    config,
                    (defConfig, userConfig, key) => {
                        if(Array.isArray(defConfig) && Array.isArray(userConfig)) {
                            //
                            //  Arrays are special: Some we merge, while others
                            //  we simply replace.
                            //
                            if(shouldReplaceArray(defConfig, key)) {
                                return userConfig;
                            } else {
                                return _.uniq(defConfig.concat(userConfig));
                            }
                        }
                    }
                );

                return callback(null, mergedConfig);
            },
            function validate(mergedConfig, callback) {
                //
                //  Various sections must now exist in config
                //
                //  :TODO: Logic is broken here:
                if(hasMessageConferenceAndArea(mergedConfig)) {
                    return callback(Errors.MissingConfig('Please create at least one message conference and area!'));
                }
                return callback(null, mergedConfig);
            },
            function setIt(mergedConfig, callback) {
                //  :TODO: .config property is to be deprecated once conversions are done
                exports.config = currentConfiguration = mergedConfig;

                exports.get = () => currentConfiguration;
                return callback(null);
            }
        ],
        err => {
            if(cb) {
                return cb(err);
            }
        }
    );
}

function init(configPath, options, cb) {
    if(!cb && _.isFunction(options)) {
        cb = options;
        options = {};
    }

    const changed = ( { fileName, fileRoot } ) => {
        const reCachedPath = paths.join(fileRoot, fileName);
        ConfigCache.getConfig(reCachedPath, (err, config) => {
            if(!err) {
                mergeValidateAndFinalize(config, err => {
                    if(!err) {
                        const Events = require('./events.js');
                        Events.emit(Events.getSystemEvents().ConfigChanged);
                    }
                });
            } else {
                console.stdout(`Configuration ${reCachedPath} is invalid: ${err.message}`); //  eslint-disable-line no-console
            }
        });
    };

    const ConfigCache = require('./config_cache.js');
    const getConfigOptions = {
        filePath    : configPath,
        noWatch     : options.noWatch,
    };
    if(!options.noWatch) {
        getConfigOptions.callback = changed;
    }
    ConfigCache.getConfigWithOptions(getConfigOptions, (err, config) => {
        if(err) {
            return cb(err);
        }

        return mergeValidateAndFinalize(config, cb);
    });
}

function getDefaultPath() {
    //  e.g. /enigma-bbs-install-path/config/
    return './config/';
}

function getDefaultConfig() {
    return {
        general : {
            boardName       : 'Another Fine ENiGMA½ BBS',

            //  :TODO: closedSystem and loginAttemps prob belong under users{}?
            closedSystem    : false,                    //  is the system closed to new users?

            menuFile        : 'menu.hjson',     //  'oputil.js config new' will set this appropriately in config.hjson; may be full path
            promptFile      : 'prompt.hjson',   //  'oputil.js config new' will set this appropriately in config.hjson; may be full path
        },

        users : {
            usernameMin         : 2,
            usernameMax         : 16,   //  Note that FidoNet wants 36 max
            usernamePattern     : '^[A-Za-z0-9~!@#$%^&*()\\-\\_+ .]+$',

            passwordMin         : 6,
            passwordMax         : 128,

            //
            //  The bad password list is a text file containing a password per line.
            //  Entries in this list are not allowed to be used on the system as they
            //  are known to be too common.
            //
            //  A great resource can be found at https://github.com/danielmiessler/SecLists
            //
            //  Current list source: https://raw.githubusercontent.com/danielmiessler/SecLists/master/Passwords/probable-v2-top12000.txt
            //
            badPassFile         : paths.join(__dirname, '../misc/bad_passwords.txt'),

            realNameMax         : 32,
            locationMax         : 32,
            affilsMax           : 32,
            emailMax            : 255,
            webMax              : 255,

            requireActivation   : false,    //  require SysOp activation? false = auto-activate

            groups              : [ 'users', 'sysops' ],        //  built in groups
            defaultGroups       : [ 'users' ],                  //  default groups new users belong to

            newUserNames        : [ 'new', 'apply' ],           //  Names reserved for applying

            badUserNames        : [
                'sysop', 'admin', 'administrator', 'root', 'all',
                'areamgr', 'filemgr', 'filefix', 'areafix', 'allfix'
            ],

            preAuthIdleLogoutSeconds    : 60 * 3,   //  3m
            idleLogoutSeconds           : 60 * 6,   //  6m

            failedLogin : {
                disconnect          : 3,            //  0=disabled
                lockAccount         : 9,            //  0=disabled; Mark user status as "locked" if >= N
                autoUnlockMinutes   : 60 * 6,       //  0=disabled; Auto unlock after N minutes.
            },
            unlockAtEmailPwReset    : true,         //  if true, password reset via email will unlock locked accounts
        },

        theme : {
            default     : 'luciano_blocktronics',
            preLogin    : 'luciano_blocktronics',

            passwordChar    : '*',
            dateFormat  : {
                short   : 'MM/DD/YYYY',
                long    : 'ddd, MMMM Do, YYYY',
            },
            timeFormat : {
                short   : 'h:mm a',
            },
            dateTimeFormat : {
                short   : 'MM/DD/YYYY h:mm a',
                long    : 'ddd, MMMM Do, YYYY, h:mm a',
            }
        },

        menus : {
            cls     : true, //  Clear screen before each menu by default?
        },

        paths : {
            config              : paths.join(__dirname, './../config/'),
            mods                : paths.join(__dirname, './../mods/'),
            loginServers        : paths.join(__dirname, './servers/login/'),
            contentServers      : paths.join(__dirname, './servers/content/'),

            scannerTossers      : paths.join(__dirname, './scanner_tossers/'),
            mailers             : paths.join(__dirname, './mailers/')       ,

            art                 : paths.join(__dirname, './../art/general/'),
            themes              : paths.join(__dirname, './../art/themes/'),
            logs                : paths.join(__dirname, './../logs/'),  //  :TODO: set up based on system, e.g. /var/logs/enigmabbs or such
            db                  : paths.join(__dirname, './../db/'),
            modsDb              : paths.join(__dirname, './../db/mods/'),
            dropFiles           : paths.join(__dirname, './../dropfiles/'), //  + "/node<x>/
            misc                : paths.join(__dirname, './../misc/'),
        },

        loginServers : {
            telnet : {
                port            : 8888,
                enabled         : true,
                firstMenu       : 'telnetConnected',
            },
            ssh : {
                port                : 8889,
                enabled             : false,    //  default to false as PK/pass in config.hjson are required

                //
                //  Private key in PEM format
                //
                //  Generating your PK:
                //  > openssl genrsa -des3 -out ./config/ssh_private_key.pem 2048
                //
                //  Then, set servers.ssh.privateKeyPass to the password you use above
                //  in your config.hjson
                //
                privateKeyPem       : paths.join(__dirname, './../config/ssh_private_key.pem'),
                firstMenu           : 'sshConnected',
                firstMenuNewUser    : 'sshConnectedNewUser',

                //
                //  SSH details that can affect security. Stronger ciphers are better for example,
                //  but terminals such as SyncTERM require KEX diffie-hellman-group14-sha1,
                //  cipher 3des-cbc, etc.
                //
                //  See https://github.com/mscdex/ssh2-streams for the full list of supported
                //  algorithms.
                //
                algorithms : {
                    kex : [
                        'ecdh-sha2-nistp256',
                        'ecdh-sha2-nistp384',
                        'ecdh-sha2-nistp521',
                        'diffie-hellman-group-exchange-sha256',
                        'diffie-hellman-group14-sha1',
                        'diffie-hellman-group-exchange-sha1',
                        'diffie-hellman-group1-sha1',
                    ],
                    cipher : [
                        'aes128-ctr',
                        'aes192-ctr',
                        'aes256-ctr',
                        'aes128-gcm',
                        'aes128-gcm@openssh.com',
                        'aes256-gcm',
                        'aes256-gcm@openssh.com',
                        'aes256-cbc',
                        'aes192-cbc',
                        'aes128-cbc',
                        'blowfish-cbc',
                        '3des-cbc',
                        'arcfour256',
                        'arcfour128',
                        'cast128-cbc',
                        'arcfour',
                    ],
                    hmac : [
                        'hmac-sha2-256',
                        'hmac-sha2-512',
                        'hmac-sha1',
                        'hmac-md5',
                        'hmac-sha2-256-96',
                        'hmac-sha2-512-96',
                        'hmac-ripemd160',
                        'hmac-sha1-96',
                        'hmac-md5-96',
                    ],
                    //  note that we disable compression by default due to issues with many clients. YMMV.
                    compress : [ 'none' ]
                },
            },
            webSocket : {
                ws : {
                    //  non-secure ws://
                    enabled         : false,
                    port            : 8810,
                },
                wss : {
                    //  secure ws://
                    //  must provide valid certPem and keyPem
                    enabled         : false,
                    port            : 8811,
                    certPem         : paths.join(__dirname, './../config/https_cert.pem'),
                    keyPem          : paths.join(__dirname, './../config/https_cert_key.pem'),
                },
            },
        },

        contentServers : {
            web : {
                domain : 'another-fine-enigma-bbs.org',

                staticRoot : paths.join(__dirname, './../www'),

                resetPassword : {
                    //
                    //  The following templates have these variables available to them:
                    //
                    //  * %BOARDNAME%       : Name of BBS
                    //  * %USERNAME%        : Username of whom to reset password
                    //  * %TOKEN%           : Reset token
                    //  * %RESET_URL%       : In case of email, the link to follow for reset. In case of landing page,
                    //                        URL to POST submit reset form.

                    //  templates for pw reset *email*
                    resetPassEmailText  : paths.join(__dirname, '../misc/reset_password_email.template.txt'),   //  plain text version
                    resetPassEmailHtml  : paths.join(__dirname, '../misc/reset_password_email.template.html'),  //  HTML version

                    //  tempalte for pw reset *landing page*
                    //
                    resetPageTemplate   : paths.join(__dirname, './../www/reset_password.template.html'),
                },

                http : {
                    enabled : false,
                    port    : 8080,
                },
                https : {
                    enabled : false,
                    port    : 8443,
                    certPem : paths.join(__dirname, './../config/https_cert.pem'),
                    keyPem  : paths.join(__dirname, './../config/https_cert_key.pem'),
                }
            },

            gopher : {
                enabled         : false,
                port            : 8070,
                publicHostname  : 'another-fine-enigma-bbs.org',
                publicPort      : 8080, //  adjust if behind NAT/etc.
                bannerFile      : 'gopher_banner.asc',

                //
                //  Set messageConferences{} to maps of confTag -> [ areaTag1, areaTag2, ... ]
                //  to export message confs/areas
                //
            }
        },

        infoExtractUtils : {
            Exiftool2Desc :  {
                cmd         : `${__dirname}/../util/exiftool2desc.js`,  //  ensure chmod +x
            },
            Exiftool : {
                cmd         : 'exiftool',
                args        : [
                    '-charset', 'utf8', '{filePath}',
                    //  exclude the following:
                    '--directory', '--filepermissions', '--exiftoolversion', '--filename', '--filesize',
                    '--filemodifydate', '--fileaccessdate', '--fileinodechangedate', '--createdate', '--modifydate',
                    '--metadatadate', '--xmptoolkit'
                ]
            },
            XDMS2Desc : {
                //  http://manpages.ubuntu.com/manpages/trusty/man1/xdms.1.html
                cmd     : 'xdms',
                args    : [ 'd', '{filePath}' ]
            },
            XDMS2LongDesc : {
                //  http://manpages.ubuntu.com/manpages/trusty/man1/xdms.1.html
                cmd     : 'xdms',
                args    : [ 'f', '{filePath}' ]
            },
        },

        fileTypes : {
            //
            //  File types explicitly known to the system. Here we can configure
            //  information extraction, archive treatment, etc.
            //
            //  MIME types can be found in mime-db: https://github.com/jshttp/mime-db
            //
            //  Resources for signature/magic bytes:
            //  * http://www.garykessler.net/library/file_sigs.html
            //
            //
            //  :TODO: text/x-ansi -> SAUCE extraction for .ans uploads
            //  :TODO: textual : bool -- if text, we can view.
            //  :TODO: asText : { cmd, args[] } -> viewable text

            //
            //  Audio
            //
            'audio/mpeg' : {
                desc            : 'MP3 Audio',
                shortDescUtil   : 'Exiftool2Desc',
                longDescUtil    : 'Exiftool',
            },
            'application/pdf' : {
                desc            : 'Adobe PDF',
                shortDescUtil   : 'Exiftool2Desc',
                longDescUtil    : 'Exiftool',
            },
            //
            //  Video
            //
            'video/mp4' : {
                desc            : 'MPEG Video',
                shortDescUtil   : 'Exiftool2Desc',
                longDescUtil    : 'Exiftool',
            },
            'video/x-matroska ' : {
                desc            : 'Matroska Video',
                shortDescUtil   : 'Exiftool2Desc',
                longDescUtil    : 'Exiftool',
            },
            'video/x-msvideo' : {
                desc            : 'Audio Video Interleave',
                shortDescUtil   : 'Exiftool2Desc',
                longDescUtil    : 'Exiftool',
            },
            //
            //  Images
            //
            'image/jpeg'    : {
                desc            : 'JPEG Image',
                shortDescUtil   : 'Exiftool2Desc',
                longDescUtil    : 'Exiftool',
            },
            'image/png' : {
                desc            : 'Portable Network Graphic Image',
                shortDescUtil   : 'Exiftool2Desc',
                longDescUtil    : 'Exiftool',
            },
            'image/gif' : {
                desc            : 'Graphics Interchange Format Image',
                shortDescUtil   : 'Exiftool2Desc',
                longDescUtil    : 'Exiftool',
            },
            'image/webp' :  {
                desc            : 'WebP Image',
                shortDescUtil   : 'Exiftool2Desc',
                longDescUtil    : 'Exiftool',
            },
            //
            //  Archives
            //
            'application/zip' : {
                desc            : 'ZIP Archive',
                sig             : '504b0304',
                offset          : 0,
                archiveHandler  : '7Zip',
            },
            /*
            'application/x-cbr' : {
                desc            : 'Comic Book Archive',
                sig             : '504b0304',
            },
            */
            'application/x-arj' : {
                desc            : 'ARJ Archive',
                sig             : '60ea',
                offset          : 0,
                archiveHandler  : 'Arj',
            },
            'application/x-rar-compressed' : {
                desc            : 'RAR Archive',
                sig             : '526172211a0700',
                offset          : 0,
                archiveHandler  : 'Rar',
            },
            'application/gzip' : {
                desc            : 'Gzip Archive',
                sig             : '1f8b',
                offset          : 0,
                archiveHandler  : 'TarGz',
            },
            //  :TODO: application/x-bzip
            'application/x-bzip2' : {
                desc            : 'BZip2 Archive',
                sig             : '425a68',
                offset          : 0,
                archiveHandler  : '7Zip',
            },
            'application/x-lzh-compressed' : {
                desc            : 'LHArc Archive',
                sig             : '2d6c68',
                offset          : 2,
                archiveHandler  : 'Lha',
            },
            'application/x-lzx' : {
                desc            : 'LZX Archive',
                sig             : '4c5a5800',
                offset          : 0,
                archiveHandler  : 'Lzx',
            },
            'application/x-7z-compressed' : {
                desc            : '7-Zip Archive',
                sig             : '377abcaf271c',
                offset          : 0,
                archiveHandler  : '7Zip',
            },

            //
            //  Generics that need further mapping
            //
            'application/octet-stream' : [
                {
                    desc            : 'Amiga DISKMASHER',
                    sig             : '444d5321',   //  DMS!
                    ext             : '.dms',
                    shortDescUtil   : 'XDMS2Desc',
                    longDescUtil    : 'XDMS2LongDesc',
                },
                {
                    desc            : 'SIO2PC Atari Disk Image',
                    sig             : '9602',   //  16bit sum of "NICKATARI"
                    ext             : '.atr',
                    archiveHandler  : 'Atr',
                }
            ]
        },

        archives : {
            archivers : {
                '7Zip' : {
                    compress        : {
                        cmd         : '7za',
                        args        : [ 'a', '-tzip', '{archivePath}', '{fileList}' ],
                    },
                    decompress      : {
                        cmd         : '7za',
                        args        : [ 'e', '-o{extractPath}', '{archivePath}' ]   //  :TODO: should be 'x'?
                    },
                    list            : {
                        cmd         : '7za',
                        args        : [ 'l', '{archivePath}' ],
                        entryMatch  : '^[0-9]{4}-[0-9]{2}-[0-9]{2}\\s[0-9]{2}:[0-9]{2}:[0-9]{2}\\s[A-Za-z\\.]{5}\\s+([0-9]+)\\s+[0-9]+\\s+([^\\r\\n]+)$',
                    },
                    extract         : {
                        cmd         : '7za',
                        args        : [ 'e', '-o{extractPath}', '{archivePath}', '{fileList}' ],
                    },
                },

                Lha : {
                    //
                    //  'lha' command can be obtained from:
                    //  * apt-get: lhasa
                    //
                    //  (compress not currently supported)
                    //
                    decompress      : {
                        cmd         : 'lha',
                        args        : [ '-efw={extractPath}', '{archivePath}' ],
                    },
                    list            : {
                        cmd         : 'lha',
                        args        : [ '-l', '{archivePath}' ],
                        entryMatch  : '^[\\[a-z\\]]+(?:\\s+[0-9]+\\s+[0-9]+|\\s+)([0-9]+)\\s+[0-9]{2}\\.[0-9]\\%\\s+[A-Za-z]{3}\\s+[0-9]{1,2}\\s+[0-9]{4}\\s+([^\\r\\n]+)$',
                    },
                    extract         : {
                        cmd         : 'lha',
                        args        : [ '-efw={extractPath}', '{archivePath}', '{fileList}' ]
                    }
                },

                Lzx : {
                    //
                    //  'unlzx' command can be obtained from:
                    //  * Debian based: https://launchpad.net/~rzr/+archive/ubuntu/ppa/+build/2486127 (amd64/x86_64)
                    //  * RedHat: https://fedora.pkgs.org/28/rpm-sphere/unlzx-1.1-4.1.x86_64.rpm.html
                    //  * Source: http://xavprods.free.fr/lzx/
                    //
                    decompress      : {
                        cmd         : 'unlzx',
                        //  unzlx doesn't have a output dir option, but we'll cwd to the temp output dir first
                        args        : [ '-x', '{archivePath}' ],
                    },
                    list            : {
                        cmd         : 'unlzx',
                        args        : [ '-v', '{archivePath}' ],
                        entryMatch  : '^\\s+([0-9]+)\\s+[^\\s]+\\s+[0-9]{2}:[0-9]{2}:[0-9]{2}\\s+[0-9]{1,2}-[a-z]{3}-[0-9]{4}\\s+[a-z\\-]+\\s+\\"([^"]+)\\"$',
                    }
                },

                Arj : {
                    //
                    //  'arj' command can be obtained from:
                    //  * apt-get: arj
                    //
                    decompress      : {
                        cmd         : 'arj',
                        args        : [ 'x', '{archivePath}', '{extractPath}' ],
                    },
                    list            : {
                        cmd             : 'arj',
                        args            : [ 'l', '{archivePath}' ],
                        entryMatch      : '^([^\\s]+)\\s+([0-9]+)\\s+[0-9]+\\s[0-9\\.]+\\s+[0-9]{2}\\-[0-9]{2}\\-[0-9]{2}\\s[0-9]{2}\\:[0-9]{2}\\:[0-9]{2}\\s+(?:[^\\r\\n]+)$',
                        entryGroupOrder : { //  defaults to { byteSize : 1, fileName : 2 }
                            fileName    : 1,
                            byteSize    : 2,
                        }
                    },
                    extract         : {
                        cmd         : 'arj',
                        args        : [ 'e', '{archivePath}', '{extractPath}', '{fileList}' ],
                    }
                },

                Rar : {
                    decompress      : {
                        cmd         : 'unrar',
                        args        : [ 'x', '{archivePath}', '{extractPath}' ],
                    },
                    list            : {
                        cmd         : 'unrar',
                        args        : [ 'l', '{archivePath}' ],
                        entryMatch  : '^\\s+[\\.A-Z]+\\s+([\\d]+)\\s{2}[0-9]{2}\\-[0-9]{2}\\-[0-9]{2}\\s[0-9]{2}\\:[0-9]{2}\\s{2}([^\\r\\n]+)$',
                    },
                    extract         : {
                        cmd         : 'unrar',
                        args        : [ 'e', '{archivePath}', '{extractPath}', '{fileList}' ],
                    }
                },

                TarGz : {
                    decompress      : {
                        cmd         : 'tar',
                        args        : [ '-xf', '{archivePath}', '-C', '{extractPath}', '--strip-components=1' ],
                    },
                    list            : {
                        cmd         : 'tar',
                        args        : [ '-tvf', '{archivePath}' ],
                        entryMatch  : '^[drwx\\-]{10}\\s[A-Za-z0-9\\/]+\\s+([0-9]+)\\s[0-9]{4}\\-[0-9]{2}\\-[0-9]{2}\\s[0-9]{2}\\:[0-9]{2}\\s([^\\r\\n]+)$',
                    },
                    extract         : {
                        cmd         : 'tar',
                        args        : [ '-xvf', '{archivePath}', '-C', '{extractPath}', '{fileList}' ],
                    }
                },

                Atr : {
                    decompress      : {
                        cmd         : 'atr',
                        args        : [ '{archivePath}', 'x', '-a', '-o', '{extractPath}' ]
                    },
                    list            : {
                        cmd         : 'atr',
                        args        : [ '{archivePath}', 'ls', '-la1' ],
                        entryMatch  : '^[rwxs-]{5}\\s+([0-9]+)\\s\\([0-9\\s]+\\)\\s([^\\r\\n\\s]*)(?:[^\\r\\n]+)?$',
                    },
                    extract         : {
                        cmd         : 'atr',
                        //  note: -l converts Atari 0x9b line feeds to 0x0a; not ideal if we're dealing with a binary of course.
                        args        : [ '{archivePath}', 'x', '-a', '-l', '-o', '{extractPath}', '{fileList}' ]
                    }
                }
            },
        },

        fileTransferProtocols : {
            //
            //  See http://www.synchro.net/docs/sexyz.txt for information on SEXYZ
            //
            zmodem8kSexyz : {
                name        : 'ZModem 8k (SEXYZ)',
                type        : 'external',
                sort        : 1,
                external    : {
                    //  :TODO: Look into shipping sexyz binaries or at least hosting them somewhere for common systems
                    //  Linux x86_64 binary: https://l33t.codes/outgoing/sexyz
                    sendCmd             : 'sexyz',
                    sendArgs            : [ '-telnet', '-8', 'sz', '@{fileListPath}' ],
                    recvCmd             : 'sexyz',
                    recvArgs            : [ '-telnet', '-8', 'rz', '{uploadDir}' ],
                    recvArgsNonBatch    : [ '-telnet', '-8', 'rz', '{fileName}' ],
                }
            },

            xmodemSexyz : {
                name        : 'XModem (SEXYZ)',
                type        : 'external',
                sort        : 3,
                external    : {
                    sendCmd             : 'sexyz',
                    sendArgs            : [ '-telnet', 'sX', '@{fileListPath}' ],
                    recvCmd             : 'sexyz',
                    recvArgsNonBatch    : [ '-telnet', 'rC', '{fileName}' ]
                }
            },

            ymodemSexyz : {
                name        : 'YModem (SEXYZ)',
                type        : 'external',
                sort        : 4,
                external    : {
                    sendCmd             : 'sexyz',
                    sendArgs            : [ '-telnet', 'sY', '@{fileListPath}' ],
                    recvCmd             : 'sexyz',
                    recvArgs            : [ '-telnet', 'ry', '{uploadDir}' ],
                }
            },

            zmodem8kSz : {
                name        : 'ZModem 8k',
                type        : 'external',
                sort        : 2,
                external    : {
                    sendCmd     : 'sz', //  Avail on Debian/Ubuntu based systems as the package "lrzsz"
                    sendArgs    : [
                        //  :TODO: try -q
                        '--zmodem', '--try-8k', '--binary', '--restricted', '{filePaths}'
                    ],
                    recvCmd     : 'rz', //  Avail on Debian/Ubuntu based systems as the package "lrzsz"
                    recvArgs    : [
                        '--zmodem', '--binary', '--restricted', '--keep-uppercase',     //  dumps to CWD which is set to {uploadDir}
                    ],
                    //  :TODO: can we not just use --escape ?
                    escapeTelnet    : true, //  set to true to escape Telnet codes such as IAC
                }
            }
        },

        messageAreaDefaults : {
            //
            //  The following can be override per-area as well
            //
            maxMessages     : 1024, //  0 = unlimited
            maxAgeDays      : 0,    //  0 = unlimited
        },

        messageConferences : {
            system_internal : {
                name    : 'System Internal',
                desc    : 'Built in conference for private messages, bulletins, etc.',

                areas : {
                    private_mail : {
                        name                    : 'Private Mail',
                        desc                    : 'Private user to user mail/email',
                        maxExternalSentAgeDays  : 30,   //  max external "outbox" item age
                    },

                    local_bulletin : {
                        name    : 'System Bulletins',
                        desc    : 'Bulletin messages for all users',
                    }
                }
            }
        },

        scannerTossers : {
            ftn_bso : {
                paths : {
                    outbound        : paths.join(__dirname, './../mail/ftn_out/'),
                    inbound         : paths.join(__dirname, './../mail/ftn_in/'),
                    secInbound      : paths.join(__dirname, './../mail/ftn_secin/'),
                    reject          : paths.join(__dirname, './../mail/reject/'),   //  bad pkt, bundles, TIC attachments that fail any check, etc.
                    //outboundNetMail   : paths.join(__dirname, './../mail/ftn_netmail_out/'),
                    //  set 'retain' to a valid path to keep good pkt files
                },

                //
                //  Packet and (ArcMail) bundle target sizes are just that: targets.
                //  Actual sizes may be slightly larger when we must place a full
                //  PKT contents *somewhere*
                //
                packetTargetByteSize    : 512000,       //  512k, before placing messages in a new pkt
                bundleTargetByteSize    : 2048000,      //  2M, before creating another archive
                packetMsgEncoding       : 'utf8',       //  default packet encoding. Override per node if desired.
                packetAnsiMsgEncoding   : 'cp437',      //  packet encoding for *ANSI ART* messages

                tic : {
                    secureInOnly    : true,             //  only bring in from secure inbound (|secInbound| path, password protected)
                    uploadBy        : 'ENiGMA TIC',     //  default upload by username (override @ network)
                    allowReplace    : false,            //  use "Replaces" TIC field
                    descPriority    : 'diz',            //  May be diz=.DIZ/etc., or tic=from TIC Ldesc
                }
            }
        },

        fileBase: {
            //  areas with an explicit |storageDir| will be stored relative to |areaStoragePrefix|:
            areaStoragePrefix   : paths.join(__dirname, './../file_base/'),

            maxDescFileByteSize         : 471859,   //  ~1/4 MB
            maxDescLongFileByteSize     : 524288,   //  1/2 MB

            fileNamePatterns: {
                //  These are NOT case sensitive
                //  FILE_ID.DIZ - https://en.wikipedia.org/wiki/FILE_ID.DIZ
                //  Some groups include a FILE_ID.ANS. We try to use that over FILE_ID.DIZ if available.
                desc        : [
                    '^[^/\]*FILE_ID\.ANS$', '^[^/\]*FILE_ID\.DIZ$', '^[^/\]*DESC\.SDI$', '^[^/\]*DESCRIPT\.ION$', '^[^/\]*FILE\.DES$', '^[^/\]*FILE\.SDI$', '^[^/\]*DISK\.ID$'  //  eslint-disable-line no-useless-escape
                ],

                //  common README filename - https://en.wikipedia.org/wiki/README
                descLong        : [
                    '^[^/\]*\.NFO$', '^[^/\]*README\.1ST$', '^[^/\]*README\.NOW$', '^[^/\]*README\.TXT$', '^[^/\]*READ\.ME$', '^[^/\]*README$', '^[^/\]*README\.md$',//  eslint-disable-line no-useless-escape
                    '^RELEASE-INFO.ASC$'    //  eslint-disable-line no-useless-escape
                ],
            },

            yearEstPatterns: [
                //
                //  Patterns should produce the year in the first submatch.
                //  The extracted year may be YY or YYYY
                //
                '\\b((?:[1-2][0-9][0-9]{2}))[\\-\\/\\.][0-3]?[0-9][\\-\\/\\.][0-3]?[0-9]\\b',   //  yyyy-mm-dd, yyyy/mm/dd, ...
                '\\b[0-3]?[0-9][\\-\\/\\.][0-3]?[0-9][\\-\\/\\.]((?:[1-2][0-9][0-9]{2}))\\b',   //  mm/dd/yyyy, mm.dd.yyyy, ...
                '\\b((?:[1789][0-9]))[\\-\\/\\.][0-3]?[0-9][\\-\\/\\.][0-3]?[0-9]\\b',          //  yy-mm-dd, yy-mm-dd, ...
                '\\b[0-3]?[0-9][\\-\\/\\.][0-3]?[0-9][\\-\\/\\.]((?:[1789][0-9]))\\b',          //  mm-dd-yy, mm/dd/yy, ...
                //'\\b((?:[1-2][0-9][0-9]{2}))[\\-\\/\\.][0-3]?[0-9][\\-\\/\\.][0-3]?[0-9]|[0-3]?[0-9][\\-\\/\\.][0-3]?[0-9][\\-\\/\\.]((?:[0-9]{2})?[0-9]{2})\\b', //  yyyy-mm-dd, m/d/yyyy, mm-dd-yyyy, etc.
                //"\\b('[1789][0-9])\\b",   //  eslint-disable-line quotes
                '\\b[0-3]?[0-9][\\-\\/\\.](?:jan|feb|mar|apr|may|jun|jul|aug|sep|oct|nov|dec|january|february|march|april|may|june|july|august|september|october|november|december)[\\-\\/\\.]((?:[0-9]{2})?[0-9]{2})\\b',
                '\\b(?:jan|feb|mar|apr|may|jun|jul|aug|sep|oct|nov|dec|january|february|march|april|may|june|july|august|september|october|november|december),?\\s[0-9]+(?:st|nd|rd|th)?,?\\s((?:[0-9]{2})?[0-9]{2})\\b',   //  November 29th, 1997
                '\\(((?:19|20)[0-9]{2})\\)',    //  (19xx) or (20xx) -- with parens -- do this before 19xx 20xx such that this has priority
                '\\b((?:19|20)[0-9]{2})\\b',    //  simple 19xx or 20xx with word boundaries
                '\\b\'([17-9][0-9])\\b',        //  '95, '17, ...
                //  :TODO: DD/MMM/YY, DD/MMMM/YY, DD/MMM/YYYY, etc.
            ],

            web : {
                path            : '/f/',
                routePath       : '/f/[a-zA-Z0-9]+$',
                expireMinutes   : 1440, //  1 day
            },

            //
            //  File area storage location tag/value pairs.
            //  Non-absolute paths are relative to |areaStoragePrefix|.
            //
            storageTags : {
                sys_msg_attach      : 'sys_msg_attach',
                sys_temp_download   : 'sys_temp_download',
            },

            areas: {
                system_message_attachment : {
                    name        : 'System Message Attachments',
                    desc        : 'File attachments to messages',
                    storageTags : [ 'sys_msg_attach' ],
                },

                system_temporary_download : {
                    name        : 'System Temporary Downloads',
                    desc        : 'Temporary downloadables',
                    storageTags : [ 'sys_temp_download' ],
                }
            }
        },

        eventScheduler : {

            events : {
                trimMessageAreas : {
                    //  may optionally use [or ]@watch:/path/to/file
                    schedule    : 'every 24 hours',

                    //  action:
                    //  - @method:path/to/module.js:theMethodName
                    //    (path is relative to engima base dir)
                    //
                    //  - @execute:/path/to/something/executable.sh
                    //
                    action      : '@method:core/message_area.js:trimMessageAreasScheduledEvent',
                },

                updateFileAreaStats : {
                    schedule    : 'every 1 hours',
                    action      : '@method:core/file_base_area.js:updateAreaStatsScheduledEvent',
                },

                forgotPasswordMaintenance : {
                    schedule    : 'every 24 hours',
                    action      : '@method:core/web_password_reset.js:performMaintenanceTask',
                    args        : [ '24 hours' ]    //  items older than this will be removed
                },

                //
                //  Enable the following entry in your config.hjson to periodically create/update
                //  DESCRIPT.ION files for your file base
                //
                /*
                updateDescriptIonFiles : {
                    schedule    : 'on the last day of the week',
                    action      : '@method:core/file_base_list_export.js:updateFileBaseDescFilesScheduledEvent',
                }
                */
            }
        },

        logging : {
            rotatingFile    : { //  set to 'disabled' or false to disable
                type        : 'rotating-file',
                fileName    : 'enigma-bbs.log',
                period      : '1d',
                count       : 3,
                level       : 'debug',
            }

            //  :TODO: syslog - https://github.com/mcavage/node-bunyan-syslog
        },

        debug : {
            assertsEnabled  : false,
        },

        statLog : {
            systemEvents : {
                loginHistoryMax: -1, //  set to -1 for forever
            }
        }
    };
}