function getCookie(name) {
  let matches = document.cookie.match(new RegExp(
    "(?:^|; )" + name.replace(/([\.$?*|{}\(\)\[\]\\\/\+^])/g, '\\$1') + "=([^;]*)"
  ));
  return matches ? decodeURIComponent(matches[1]) : undefined;
}
function getRandomInt(max) {
  return Math.floor(Math.random() * Math.floor(max));
}
function goToNext() {
  if($(".cn-nav-right-Exercise").length != 0){
    document.location.href = $(".cn-nav-right-Exercise").attr("href");
  }else{
    console.log("go back");
    document.location.href = $(".cn-nav-top-").attr("href");
  }
}
function switchBot() {
  if(botStatement){
    document.cookie = "botStatement=false; max-age=13600";
    document.cookie = "wrongAnswers; max-age=-1";
    document.cookie = "currentAnswers; max-age=-1";
  }else{
    document.cookie = "botStatement=true; max-age=13600";
  }
  document.location.reload();
}

botStatement = false;
$(function() {
console.log("pastebin edition");
  //Проверка на включенность
  if(getCookie("botStatement") == "true"){
    botStatement = true;
    setTimeout(function() {
      //Проверка на местонахождение на странице с отдельным вопросом
      if($(".no-bmarg").length != 0){
        //Проверка на страницу с результатами
        if($(".gxs-result").length != 0){
          //Если ответ правильный
          if($(".gxs-result").attr("data-is-correct") == "true"){
            console.log("next");
            document.cookie = "wrongAnswers; max-age=-1";
            document.cookie = "currentAnswers; max-age=-1";
            goToNext()
          //Если ответ ложный
          }else{
            console.log(getCookie("currentAnswers") + " is wrong");
            console.log("retry");
            document.cookie = "wrongAnswers=" + JSON.parse(getCookie("wrongAnswers")).push(getCookie("currentAnswers")) + "; max-age=13600";
            document.cookie = "currentAnswers; max-age=-1";
            document.location.href = $("div.task-buttons > a.btn").attr("href");
          }
        //Страница с вопросом и вариантами ответа
        }else{
          if (($("input[type=radio]").length == 1 || $("select.gxs-answer-dropdown").length == 1) && $("input[type=text]").length == 0) {
            console.log("checking...");

            if(getCookie("wrongAnswers") != undefined){
              wrongAnswers = JSON.parse(getCookie("wrongAnswers"));
            }else{
              wrongAnswers = [];
            }
            console.log("wrong answers:");
            console.log(wrongAnswers);
            var i = 0;

            if($("input[type=radio]").length == 1){
              for (; i < $("input[type=radio]").length; i++) {
                if(!(wrongAnswers.includes($($("input[type=radio]")[i]).val()))){
                  break;
                }
              }
              $($("input[type=radio]")[i]).click();
              document.cookie = "currentAnswers=" + $($("input[type=radio]")[i]).val() + "; max-age=13600";
            }else if($("select.gxs-answer-dropdown").length == 1){
              for (; i < $("select.gxs-answer-dropdown > option").length; i++) {
                if(!(wrongAnswers.includes($($("select.gxs-answer-dropdown > option")[i]).val()))){
                  break;
                }
              }
              $($("select.gxs-answer-dropdown > option")[i]).attr('selected', 'true');
              document.cookie = "currentAnswers=" + $($("select.gxs-answer-dropdown > option")[i]).val() + "; max-age=13600";
            }

            console.log(getCookie("currentAnswers"));
            $("#submitAnswerBtn").click();

          }else{
            console.log("too hard");
            goToNext();
          }
        }
      }
    }, 3000)
  }

  //Панель управления
  if(botStatement){
    buttonText = "Выкл";
  }else{
    buttonText = "Вкл";
  }
  $("<div style='display: flex;justify-content: center;align-items: center;top: calc(100vh - 50px);left: 0;position: fixed;z-index: 100;background: aquamarine;padding: 10px;height: 50px;'><span style='margin-right:10px;'>Бот</span><button onclick='switchBot()'>" + buttonText + "</button></div>").appendTo($("body"));
});