import { logger } from "../log.js";
const net = require("net")
  , tls = require("tls")
  , EventEmitter = require("events").EventEmitter
  , util = require("util")
  , fs = require("fs");

class irc {
  constructor(options) {
    EventEmitter.call(this);
    this.options = options || {};
    this.options.channels = this.options.channels || [];
    this.options.host = this.options.host || "127.0.0.1";
    this.options.port = this.options.port || 6667;
    this.options.ssl = this.options.ssl || false;
    this.options.selfSigned = this.options.selfSigned || false;
    this.options.sasl = this.options.sasl || false;
    this.network = this.options.network || "test";
    this.nickname = this.options.nickname || "test";
    this.username = this.options.username || "test";
    this.realname = this.options.realname || "test";
    this.channels = this.options.channels || [];
    this._recachetime = 60 * 5; // 5 minutes
    this._cmd = new Map();

    const files = fs.readdirSync(`${__dirname}/irc/`);
    for(let file in files) {
      if(files[file].substr(-3, 3) === ".js") {
        logger.debug(`(${this.network}) loading cmd: ${files[file]}`);
        require(`${__dirname}/irc/${files[file]}`)(this);
      }
    }

    this.server = {
      motd: "",
      me: {},
      channel: [],
      user: new Map()
    };
    this.socket = (this.options.ssl ? tls : net).connect({
      host: this.options.host,
      port: this.options.port,
      rejectUnauthorized: !this.options.selfSigned
    }, () => {
      this.send(`NICK ${this.nickname}`);
      this.send(`USER ${this.username} 0 * : ${this.realname}`);
      if(this.options.sasl)
        this.send("CAP LS");
    });
    this.socket.setEncoding("utf-8");
    this.socket.on("data", msg => {
      msg = msg.split(/\r?\n|\r/);
      for(let tmp in msg) {
        if(msg[tmp].length > 0) {
          const cmd = this.parse(msg[tmp]);
          if(this._cmd.has(cmd.command))
            this._cmd.get(cmd.command)(cmd);
        }
      }
    });
  }
  send(data) {
    this.socket.write(`${data}\n`);
    logger.debug(`(${this.network}) out: ${data}`);
  }
  parse(data, [a, ...b] = data.split(/ +:/)) {
    let tmp = a.split(" ").concat(b);
    logger.debug(`(${this.network}) in: ${[...tmp]}`);
    return data.charAt(0) === ":" ? {
      prefix: tmp.shift(),
      command: tmp.shift(),
      params: tmp
    } : {
      prefix: null,
      command: tmp.shift(),
      params: tmp
    };
  }
  reply(tmp) {
    return {
      type: "irc",
      network: this.network,
      channel: tmp.params[0],
      user: this.parsePrefix(tmp.prefix),
      message: tmp.params[1],
      time: ~~(Date.now() / 1000),
      raw: tmp,
      reply: msg => this.send(`PRIVMSG ${tmp.params[0]} :${this.format(""+msg)}`),
      replyAction: msg => this.send(`PRIVMSG ${tmp.params[0]} :\u0001ACTION ${this.format(""+msg)}\u0001`),
      replyNotice: msg => this.send(`NOTICE ${tmp.params[0]} :${this.format(""+msg)}`),
      _chan: this.server.channel[tmp.params[0]],
      _user: this.server.user,
      _cmd: this._cmd,
      join: chan => this.join(chan),
      part: (chan, msg) => this.part(chan, msg),
      whois: user => this.whois(user),
      write: msg => this.send(msg)
    };
  }
  join(channel) {
    this.send(`JOIN ${(typeof channel === "object") ? channel.join(",") : channel}`);
  }
  part(channel, msg=false) {
    this.send(`PART ${(typeof channel === "object") ? channel.join(",") : channel}${msg ? " " + msg : " part"}`);
  }
  whois(user, force = false) {
    user = user.toLowerCase();
    if(this.server.user.hasi(user) && !force)
      if(this.server.user.geti(user).cached >= ~~(Date.now() / 1000) - this._recachetime)
        return;
    this.send(`WHOIS ${user}`);
  }
  parsePrefix(prefix) {
    prefix = /:?(.*)\!(.*)@(.*)/.exec(prefix);
    return {
      nick: prefix[1],
      username: prefix[2],
      hostname: prefix[3]
    };
  }
  format(msg) {
    return msg;
    /*return msg
      .replace(/\[b\](.*?)\[\/b\]/g, "\x02$1\x0F") // bold
      .replace(/\[i\](.*?)\[\/i\]/g, "\x1D$1\x0F") // italic
      ;*/
  }
}

module.exports = irc;
util.inherits(irc, EventEmitter);

Map.prototype.hasi = function(val) {
  for (let [key] of this)
    if(key.toLowerCase() === val.toLowerCase())
      return true;
  return false;
};
Map.prototype.geti = function(val) {
  for (let [key, value] of this)
    if(key.toLowerCase() === val.toLowerCase())
      return value;
  return false;
};
Map.prototype.deli = function(val) {
  for (let [key] of this)
    if(key.toLowerCase() === val.toLowerCase())
      this.delete(key);
};