/*
  Description: Rebroadcasts any `text` to all clients in a `channel` with `nick`
*/

import * as UAC from "../utility/UAC/_info";

// module support functions
const parseText = (text) => {
  // verifies user input is text
  if (typeof text !== "string") {
    return false;
  }

  let sanitizedText = text;

  // strip newlines from beginning and end
  sanitizedText = sanitizedText.replace(/^\s*\n|^\s+$|\n\s*$/g, "");
  // replace 3+ newlines with just 2 newlines
  sanitizedText = sanitizedText.replace(/\n{3,}/g, "\n\n");

  return sanitizedText;
};

// module main
export async function run(core, server, socket, data) {
  // check user input
  const text = parseText(data.text);

  if (!text) {
    // lets not send objects or empty text, yea?
    return server.police.frisk(socket.address, 13);
  }

  // check for spam
  const score = text.length / 83 / 4;
  if (server.police.frisk(socket.address, score)) {
    return server.reply(
      {
        cmd: "warn",
        text:
          "You are sending too much text. Wait a moment and try again.\nPress the up arrow key to restore your last message.",
      },
      socket
    );
  }

  // make sure requested nickname meets standards
  const newNick = data.nick.trim();
  if (!UAC.verifyNickname(newNick)) {
    return server.reply(
      {
        cmd: "warn",
        text: "Nickname must consist of up to 24 letters, numbers, and underscores",
      },
      socket
    );
  }

  // prevent admin impersonation
  // TODO: prevent mod impersonation
  if (newNick.toLowerCase() === core.config.adminName.toLowerCase()) {
    server.police.frisk(socket.address, 4);

    return server.reply(
      {
        cmd: "warn",
        text: "You are not the admin, liar!",
      },
      socket
    );
  }

  // find any sockets that have the same nickname
  const userExists = server.findSockets({
    channel: socket.channel,
    nick: (targetNick) => targetNick.toLowerCase() === newNick.toLowerCase(),
  });

  // return error if found
  if (userExists.length > 0) {
    // That nickname is already in that channel
    return server.reply(
      {
        cmd: "warn",
        text: "Nickname taken",
      },
      socket
    );
  }

  // build chat payload
  const payload = {
    cmd: "chat",
    nick: newNick,
    text,
    level: socket.level,
  };

  if (UAC.isAdmin(socket.level)) {
    payload.admin = true;
  } else if (UAC.isModerator(socket.level)) {
    payload.mod = true;
  }

  if (socket.trip) {
    payload.trip = socket.trip;
  }

  // broadcast to channel peers
  server.broadcast(payload, {channel: socket.channel});

  // stats are fun
  core.stats.increment("messages-sent");

  return true;
}

export const requiredData = ["text", "nick"];
export const info = {
  name: "bridge",
  description: "Broadcasts passed `text` field to the calling users channel using `nick`",
  usage: `API: { cmd: 'bridge', text: '<text to send>', nick: 'nick'} `,
};