"use strict";
let commands = require("../../config/commands");
const Discord = require("discord.js");
let initialized = false;
let discordBot = null;
let commandsList = null;

module.exports = {
  init: init
};

function init(discordBot_) {
  if (initialized) {
    throw new Error("init was already called once");
  }

  discordBot = discordBot_;

  discordBot.on("message", checkForCommand);
}

/**
 *
 * @param {String} message
 */
let checkForCommand = function(message) {
  //build the command list ONLY on first run
  let firstRun = false;
  if (commandsList === null) {
    firstRun = true;
    commandsList = "";
  }
  //for each message go through all the commands and check if there are any matches
  Object.keys(commands).forEach(command => {
    //during the first run also build the cache
    if (firstRun) commandsList += command + ", ";

    //if a command is found
    if (
      !message.author.bot &&
      message.content.toLowerCase().indexOf(command.toLowerCase()) >= 0 &&
      commands[command].operation === "send"
    ) {
      //send a message to the channel according to the config
      message.channel.send("", new Discord.RichEmbed(commands[command].bundle));
    }
  });
  //if the user is requesting the list of commands, then print it
  if (
    !message.author.bot &&
    message.content.toLowerCase().indexOf("!helpcommands") >= 0
  ) {
    let bundle = commands["!helpcommands"].bundle;
    commandsList = commandsList.replace(/,\s$/g, "");
    bundle.description = "**" + commandsList + "**";
    message.channel.send("", new Discord.RichEmbed(bundle));
  }
};