var allRules = [
    { hostname: ["agar.io"],
      scriptUriRe: /^http:\/\/agar\.io\/main_out\.js/,
      replace: function (m) {
          m.removeNewlines();

          m.replace("var:allCells",
                    /(=null;)(\w+)(.hasOwnProperty\(\w+\)?)/,
                    "$1" + "$v=$2;" + "$2$3",
                    "$v = {}");

          m.replace("var:myCells",
                    /(case 32:)(\w+)(\.push)/,
                    "$1" + "$v=$2;" + "$2$3",
                    "$v = []");

          m.replace("var:top",
                    /case 49:[^:]+?(\w+)=\[];/,
                    "$&" + "$v=$1;",
                    "$v = []");

          m.replace("var:topTeams",
                    /case 50:(\w+)=\[];/,
                    "$&" + "$v=$1;",
                    "$v = []");

          var dr = "(\\w+)=\\w+\\.getFloat64\\(\\w+,!0\\);\\w+\\+=8;\\n?";
          var dd = 7071.067811865476;
          m.replace("var:dimensions hook:dimensionsUpdated",
                    RegExp("case 64:"+dr+dr+dr+dr),
                    "$&" + "$v = [$1,$2,$3,$4],$H($1,$2,$3,$4),",
                    "$v = " + JSON.stringify([-dd,-dd,dd,dd]));

          var vr = "(\\w+)=\\w+\\.getFloat32\\(\\w+,!0\\);\\w+\\+=4;";
          m.save() &&
              m.replace("var:rawViewport:x,y var:disableRendering:1",
                        /else \w+=\(5\*\w+\+(\w+)\)\/6,\w+=\(5\*\w+\+(\w+)\)\/6,.*?;/,
                        "$&" + "$v0.x=$1; $v0.y=$2; if($v1)return;") &&
              m.replace("var:disableRendering:2 hook:skipCellDraw",
                        /(\w+:function\(\w+\){)(if\(this\.\w+\(\)\){\+\+this\.[\w$]+;)/,
                        "$1" + "if($v || $H(this))return;" + "$2") &&
              m.replace("var:rawViewport:scale",
                        /Math\.pow\(Math\.min\(64\/\w+,1\),\.4\)/,
                        "($v.scale=$&)") &&
              m.replace("var:rawViewport:x,y,scale",
                        RegExp("case 17:"+vr+vr+vr),
                        "$&" + "$v.x=$1; $v.y=$2; $v.scale=$3;") &&
              m.reset_("window.agar.rawViewport = {x:0,y:0,scale:1};" +
                       "window.agar.disableRendering = false;") ||
              m.restore();

          m.replace("reset hook:connect var:ws var:webSocket",
                    /new WebSocket\((\w+)\);/,
                    "$v1 = $&; $v0=$1;" + m.reset + "$H();",
                    "$v0 = ''; $v1 = null;");

          m.replace("property:scale",
                    /function \w+\(\w+\){\w+\.preventDefault\(\);[^;]+;1>(\w+)&&\(\1=1\)/,
                    `;${makeProperty("scale", "$1")};$&`);

          m.replace("var:minScale",
                    /;1>(\w+)&&\(\1=1\)/,
                    ";$v>$1 && ($1=$v)",
                    "$v = 1");

          m.replace("var:region",
                    /console\.log\("Find "\+(\w+\+\w+)\);/,
                    "$&" + "$v=$1;",
                    "$v = ''");

          m.replace("cellProperty:isVirus",
                    /((\w+)=!!\(\w+&1\)[\s\S]{0,400})((\w+).(\w+)=\2;)/,
                    "$1$4.isVirus=$3");

          m.replace("var:dommousescroll",
                    /("DOMMouseScroll",)(\w+),/,
                    "$1($v=$2),");

          m.replace("var:skinF hook:cellSkin",
                    /(\w+.fill\(\))(;null!=(\w+))/,
                    "$1;" +
                    "if($v)$3 = $v(this,$3);" +
                    "if($h)$3 = $h(this,$3);" +
                    "$2");

          m.replace("hook:afterCellStroke",
                    /\((\w+)\.strokeStyle="#000000",\1\.globalAlpha\*=\.1,\1\.stroke\(\)\);\1\.globalAlpha=1;/,
                    "$&" + "$H(this);");

          m.replace("var:showStartupBg",
                    /\w+\?\(\w\.globalAlpha=\w+,/,
                    "$v && $&",
                    "$v = true");

          var vAlive = /\((\w+)\[(\w+)\]==this\){\1\.splice\(\2,1\);/.exec(m.text);
          var vEaten = /0<this\.[$\w]+&&(\w+)\.push\(this\)}/.exec(m.text);
          !vAlive && console.error("Expose: can't find vAlive");
          !vEaten && console.error("Expose: can't find vEaten");
          if (vAlive && vEaten)
              m.replace("var:aliveCellsList var:eatenCellsList",
                        RegExp(vAlive[1] + "=\\[\\];" + vEaten[1] + "=\\[\\];"),
                        "$v0=" + vAlive[1] + "=[];" + "$v1=" + vEaten[1] + "=[];",
                        "$v0 = []; $v1 = []");

          m.replace("hook:drawScore",
                    /(;(\w+)=Math\.max\(\2,(\w+\(\))\);)0!=\2&&/,
                    "$1($H($3))||0!=$2&&");

          m.replace("hook:beforeTransform hook:beforeDraw var:drawScale",
                    /(\w+)\.save\(\);\1\.translate\((\w+\/2,\w+\/2)\);\1\.scale\((\w+),\3\);\1\.translate\((-\w+,-\w+)\);/,
                    "$v = $3;$H0($1,$2,$3,$4);" + "$&" + "$H1($1,$2,$3,$4);",
                    "$v = 1");

          m.replace("hook:afterDraw",
                    /(\w+)\.restore\(\);(\w+)&&\2\.width&&\1\.drawImage/,
                    "$H();" + "$&");

          m.replace("hook:cellColor",
                    /(\w+=)this\.color,/,
                    "$1 ($h && $h(this, this.color) || this.color),");

          m.replace("var:drawGrid",
                    /(\w+)\.globalAlpha=(\.2\*\w+);/,
                    "if(!$v)return;" + "$&",
                    "$v = true");

          m.replace("hook:drawCellMass",
                    /&&\((\w+\|\|0==\w+\.length&&\(!this\.\w+\|\|this\.\w+\)&&20<this\.size)\)&&/,
                    "&&( $h ? $h(this,$1) : ($1) )&&");

          m.replace("hook:cellMassText",
                    /(\.\w+)(\(~~\(this\.size\*this\.size\/100\)\))/,
                    "$1( $h ? $h(this,$2) : $2 )");

          m.replace("hook:cellMassTextScale",
                    /(\.\w+)\((this\.\w+\(\))\)([\s\S]{0,1000})\1\(\2\/2\)/,
                    "$1($2)$3$1( $h ? $h(this,$2/2) : ($2/2) )");

          m.replace("var:enableDirectionSending",
                    /;64>(\w+)\*\1\+(\w+)\*\2/,
                    ";if(!$v)return" + "$&",
                    "$v = true");

          m.replace("var:simpleCellDraw",
                    /(:function\(\){)(var a=10;)/,
                    "$1 if($v)return true;$2",
                    "$v=false");

          m.replace("hook:updateLeaderboard",
                    /({\w+=null;)(if\(null!=)/,
                    "$1 if($H())return; $2");

          var template = (key,n) =>
              `this\\.${key}=\\w+\\*\\(this\\.(\\w+)-this\\.(\\w+)\\)\\+this\\.\\${n};`;
          var re = new RegExp(template('x', 2) + template('y', 4) + template('size', 6));
          var match = re.exec(m.text);
          if (match) {
              m.cellProp.nx = match[1];
              m.cellProp.ny = match[3];
              m.cellProp.nSize = match[5];
          } else
              console.error("Expose: cellProp:x,y,size search failed!");

      }},
];

function makeProperty(name, varname) {
    return "'" + name + "' in window.agar || " +
        "Object.defineProperty( window.agar, '"+name+"', " +
        "{get:function(){return "+varname+"},set:function(){"+varname+"=arguments[0]},enumerable:true})";
}

if (window.top != window.self)
    return;

if (document.readyState !== 'loading')
    return console.error("Expose: this script should run at document-start");

var isFirefox = /Firefox/.test(navigator.userAgent);
// Stage 1: Find corresponding rule
var rules;
for (var i = 0; i < allRules.length; i++)
    if (allRules[i].hostname.indexOf(window.location.hostname) !== -1) {
        rules = allRules[i];
        break;
    }
if (!rules)
    return console.error("Expose: cant find corresponding rule");


// Stage 2: Search for `main_out.js`
if (isFirefox) {
    function bse_listener(e) { tryReplace(e.target, e) ;}
    window.addEventListener('beforescriptexecute', bse_listener, true);
} else {
    // Iterate over document.head child elements and look for `main_out.js`
    for (var i = 0; i < document.head.childNodes.length; i++)
        if (tryReplace(document.head.childNodes[i]))
            return;
    // If there are no desired element in document.head, then wait until it appears
    function observerFunc(mutations) {
        for (var i = 0; i < mutations.length; i++) {
            var addedNodes = mutations[i].addedNodes;
            for (var j = 0; j < addedNodes.length; j++)
                if (tryReplace(addedNodes[j]))
                    return observer.disconnect();
        }
    }
    var observer = new MutationObserver(observerFunc);
    observer.observe(document.head, {childList: true});
}

// Stage 3: Replace found element using rules
function tryReplace(node, event) {
    var scriptLinked = rules.scriptUriRe && rules.scriptUriRe.test(node.src);
    var scriptEmbedded = rules.scriptTextRe && rules.scriptTextRe.test(node.textContent);
    if (node.tagName != "SCRIPT" || (!scriptLinked && !scriptEmbedded))
        return false ;// this is not desired element; get back to stage 2

    if (isFirefox) {
        event.preventDefault();
        window.removeEventListener('beforescriptexecute', bse_listener, true);
    }

    var mod = {
        reset: "",
        text: null,
        history: [],
        cellProp: {},
        save() {
            this.history.push({reset:this.reset, text:this.text});
            return true;
        },
        restore() {
            var state = this.history.pop();
            this.reset = state.reset;
            this.text = state.text;
            return true;
        },
        reset_(reset) {
            this.reset += reset;
            return true;
        },
        replace(what, from, to, reset) {
            var vars = [], hooks = [];
            what.split(" ").forEach((x) => {
                x = x.split(":");
                x[0] === "var" && vars.push(x[1]);
                x[0] === "hook" && hooks.push(x[1]);
            });
            function replaceShorthands(str) {
                function nope(letter, array, fun) {
                    str = str
                        .split(new RegExp('\\$' + letter + '([0-9]?)'))
                        .map((v,n) => n%2 ? fun(array[v||0]) : v)
                        .join("");
                }
                nope('v', vars, (name) => "window.agar." + name);
                nope('h', hooks, (name) => "window.agar.hooks." + name);
                nope('H', hooks, (name) =>
                     "window.agar.hooks." + name + "&&" +
                     "window.agar.hooks." + name);
                return str;
            }
            var newText = this.text.replace(from, replaceShorthands(to));
            if(newText === this.text) {
                console.error("Expose: `" + what + "` replacement failed!");
                return false;
            } else {
                this.text = newText;
                if (reset)
                    this.reset += replaceShorthands(reset) + ";";
                return true;
            }