// ==UserScript==
// @name         MooMoo.io Auto Heal
// @namespace    https://greasyfork.org/users/1064285-vcrazy-gaming
// @version      0.2
// @description  Simple auto-healing script for MooMoo.io.
// @match        *://moomoo.io/*
// @match        *://*.moomoo.io/*
// @author       _VcrazY_
// @require      https://greasyfork.org/scripts/423602-msgpack/code/msgpack.js
// @grant        none
// @icon         https://moomoo.io/img/favicon.png?v=1
// @license      MIT
// @downloadURL none
// ==/UserScript==
(function () {
  // Variables
  let items = [];
  let weapons = [];
  let inGame = false;
  let tmpHealth = 100;
  let sTime = 0;
  let sCount = 0;
  let msgpack = window.msgpack;
  let ws;

  // WebSocket setup
  ws = new Promise(function (resolve) {
    let {
      send
    } = WebSocket.prototype;
    WebSocket.prototype.send = function (...x) {
      send.apply(this, x);
      this.send = send;
      this.io = function (...datas) {
        const [packet, ...data] = datas;
        this.send(new Uint8Array(Array.from(msgpack.encode([packet, data]))));
      };
      this.addEventListener("message", function (e) {
        const [packet, data] = msgpack.decode(new Uint8Array(e.data));
        let sid = data[0];
        let health = data[1];

        // INVENTORY
        let inventory = {
          "food": items[0],
          "walls": items[1],
          "spikes": items[2],
          "mill": items[3],
          "mine": items[4],
          "trap": items[5],
          "booster": items[6],
          "turret": items[7],
          "watchtower": items[8],
          "buff": items[9],
          "spawn": items[10],
          "sapling": items[11],
          "blocker": items[12],
          "teleporter": items[13]
        };

        // ADD EVENT LISTENER
        let addEventListener = {
          "setupGame": "C",
          "updateHealth": "O",
          "killPlayer": "P",
          "updateItems": "V"
        };
        switch (packet) {
          // SETUP GAME
          case addEventListener.setupGame:
            inGame = true;
            items = [0, 3, 6, 10];
            weapons = [0];
            break;

          // UPDATE HEALTH
          case addEventListener.updateHealth:
            if (sid) {
              if (health < 100 && inGame) {
                if (sCount < 4) {
                  place(inventory.food);
                }
                setTimeout(function () {
                  place(inventory.food);
                }, 120);
              }
              if (tmpHealth - health < 0) {
                if (sTime) {
                  let timeHit = Date.now() - sTime;
                  sTime = 0;
                  sCount = timeHit <= 120 ? sCount + 1 : Math.max(0, sCount - 2);
                }
              } else {
                sTime = Date.now();
              }
              tmpHealth = health;
            }
            break;

          // KILL PLAYER
          case addEventListener.killPlayer:
            inGame = false;
            break;

          // UPDATE ITEMS
          case addEventListener.updateItems:
            if (sid) {
              if (health) {
                weapons = sid;
              } else {
                items = sid;
              }
            }
            break;
        }
      });
      resolve(this);
    };
  });

  // Functions
  const sendPacket = function (...datas) {
    const [type, ...data] = datas;
    var binary = msgpack.encode([type, data]);
    ws.then(function (wsInstance) {
      wsInstance.send(new Uint8Array(Array.from(binary)));
    });
  };

  // PLACE
  const place = function (id, ang) {
    if (inGame) {
      sendPacket("G", id, false);
      hit(ang);
      selectWeapon();
    }
  };

  // SELECT WEAPON
  const selectWeapon = function () {
    if (inGame) {
      sendPacket("G", weapons[0], true);
    }
  };

  // HIT
  const hit = function (id, ang) {
    if (inGame) {
      sendPacket("d", 1, ang);
      sendPacket("d", 0, ang);
    }
  };
})();