// ==UserScript==
// @name         Global Chat
// @namespace    -
// @version      0.1
// @description  You can chat with other players from all servers! When you write something in the chat sploop.io then it is shown in the global chat.
// @author       Nudo
// @match        *://sploop.io/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=sploop.io
// @grant        none
// @downloadURL none
// ==/UserScript==

(function() {
    const SERVER = "globalchatserver.stopitplz.repl.co"
    const WSSERVER = `ws${location.protocol.slice(4, 5) || ""}://${SERVER}`

    let socket = null

    function sendMessage(data) {
        if (!socket) {
            return void 0
        }

        if (socket.readyState !== 1) {
            return void 0
        }

        socket.send(JSON.stringify([localStorage.nickname || "noname", data]))
    }

    function serverSetup() {
        socket = new WebSocket(WSSERVER)
        socket.binaryType = "arraybuffer"

        socket.onopen = () => {
            sendMessage("connected")
        }

        socket.onmessage = (message) => {
            const data = JSON.parse(message.data)

            onMessage(data)
        }
    }

    function onMessage(data) {
        Menu.addMessage(data[0], data[1], data[2])
    }

    window.addEventListener("load", () => serverSetup())

    const Menu = {}

    Menu.html = `
    <div class="global-chat-holder">
      <container class="chat-wrapper"></container>
    </div>

    <style>
    .chat-wrapper main {
      color: #fff;
      margin: 3px;
      font-size: 14px;
    }

    .chat-wrapper {
      display: flex;
      flex-direction: column;
      overflow-y: auto;
      max-height: 400px;
    }

    .chat-wrapper::-webkit-scrollbar {
      width: 0;
    }

    .global-chat-holder {
      position: absolute;
      top: 5px;
      left: 5px;
      z-index: 999999;
    }
    </style>
    `

    Menu.addMessage = function(nickname, message, color) {
        if (!message.length) {
            return void 0
        }

        const wrapper = document.querySelector(".chat-wrapper")

        message = antiSpam(message)

        wrapper.innerHTML += `
        <main class="text-shadowed-3" style="color: ${color || "#fff"}">
        ${nickname}: ${message}
        </main>
        `

        wrapper.scrollTo(0, wrapper.scrollHeight)
    }

    const canvas = document.getElementById("game-canvas")

    canvas.insertAdjacentHTML("beforebegin", Menu.html)

    window.addEventListener("keydown", (event) => {
        if (event.code === "Enter") {
            const chatValue = document.getElementById("chat").value

            sendMessage(chatValue)
        }
    })

    function antiSpamLetters(message) {
        let letterCounter = {}

        for (let i = 0; i < message.length; i++) {
            if (!message[i - 1]) {
                continue
            }

            if (letterCounter[message[i]] == null) {
                letterCounter[message[i]] = 0
            }

            if (message[i] === message[i - 1]) {
                letterCounter[message[i]] += 1
            }
        }

        for (const letter in letterCounter) {
            if (letterCounter[letter] >= 5) {
                message = "spam"
            }
        }

        return message
    }

    function antiSpamSymbols(message) {
        let symbolCounter = {}

        const symbols = ["@", "!", "#", "$", "%", "&"]

        for (const symbol of symbols) {
            if (message.match(symbol)) {
                for (const letter of message) {
                    if (symbolCounter[letter] == null) {
                        symbolCounter[letter] = 0
                    }

                    if (letter === symbol) {
                        symbolCounter[letter] += 1
                    }
                }
            }
        }

        for (const symbol in symbolCounter) {
            if (symbolCounter[symbol] >= 5) {
                message = "spam"
            }
        }

        return message
    }

    function antiSpam(message) {
        message = antiSpamLetters(message)
        message = antiSpamSymbols(message)

        return message
    }
})()