var combine = function(a, min) {
  var fn = function(n, src, got, all) {
      if (n == 0) {
          if (got.length > 0) {
              all[all.length] = got;
          }
          return;
      }
      for (var j = 0; j < src.length; j++) {
          fn(n - 1, src.slice(j + 1), got.concat([src[j]]), all);
      }
      return;
  }
  var all = [];
  for (var i = min; i < a.length; i++) {
      fn(i, a, [], all);
  }
  all.push(a);
  return all;
}

function overrideTimer() {
  var d = ng.probe(getAllAngularRootElements()[0]);
  d.componentInstance.courseTimerService.intMinimumTime = 1;
}

function getContinueButton() {
  var xpath = "//button[contains(text(),\"Continue\")]";
  return document.evaluate(xpath, document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;
}

function getTryAgainButton() {
  var xpath = "//button[contains(text(),\"Try Again\")]";
  return document.evaluate(xpath, document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;
}

async function solveQuiz() {
  var radioOptions = Array.prototype.slice.call(document.querySelectorAll('app-option-text input[type=radio]'));
  var checkboxOptions = Array.prototype.slice.call(document.querySelectorAll('app-option-text input[type=checkbox]'));
  console.log("solving quiz");
  for (o of radioOptions) {
    o.click();
    await new Promise(r => setTimeout(r, 100));
    var submitButton = document.querySelector('button#quiz-submit-btn');
    if (submitButton) {
      submitButton.click();
    }
    await new Promise(r => setTimeout(r, 100));
    var tryAgainButton = getTryAgainButton();

    if (tryAgainButton) {
      tryAgainButton.click();
    } else {
      return;
    }
  };
  if (checkboxOptions) {
    return await solveCheckboxQuiz(checkboxOptions);
  }
}

async function solveCheckboxQuiz(options) {
  document.getElementById("next-btn").disabled = false;
  overrideTimer();
  var allPermutations = combine(options, 1);
  for (p of allPermutations) {
    Array.from(document.querySelectorAll('.option-text-selected')).forEach(function(e) {e.click()})

    for (o of p) {
      o.click();
    }
    await new Promise(r => setTimeout(r, 100));
    var submitButton = document.querySelector('button#quiz-submit-btn');
    if (submitButton) {
      submitButton.click();
    }
    var tryAgainButton = getTryAgainButton();

    if (tryAgainButton) {
      tryAgainButton.click();
    } else {
      return;
    }
  }
}

async function click_buttons() {
  var loader = document.querySelector('div.loader');
  if (loader) {
    console.log("loader found, waiting");
    await new Promise(r => setTimeout(r, 1000));
    return click_buttons();
  }
  var continueButton = getContinueButton();

  if (continueButton) {
    continueButton.click();
  }

  var feedbackClose = document.querySelector('.feedback-con .fa-times');

  if (feedbackClose) {
    feedbackClose.click();
  }

  var appQuiz = document.querySelector('app-quiz');
  if (appQuiz) {
    await solveQuiz();
  }

  var quad = document.querySelector('.quad:not(.selected)');

  if (quad) {
    quad.click();
  }


  var spot = document.querySelector('.hot-spot-enabled');
  if (spot) {
    var spotArrowRight = document.querySelector('.fa-arrow-right');
    if (spotArrowRight) {
      console.log("spot arrow found, clicking");
      spotArrowRight.click();
    } else {
      console.log("Spot found, clicking");
      spot.click();
    }
  }
  var close = document.querySelector('.closeBtnhotspot');
  if (close) {
    console.log("close button found, clicking");
    close.click();
  }

  var image = document.querySelector('.option-con.enabled:not(.visited)')

  if (image) {
    console.log("image found, clicking");
    image.click();
  }

  var arrowNext = document.querySelector('div.arrow-right:not(.disabled) button')

  if (arrowNext) {
    console.log("next arrow found, clicking");
    arrowNext.click();
  }

  var arrowRight = document.querySelector('div.arrow-right:not(.disabled) .nextBtn');
  if (arrowRight) {
    arrowRight.click();
  }

  var circleArrow = document.querySelector('.fa-arrow-circle-right');
  if (circleArrow) {
    circleArrow.click();
  }

  var showAllButton = document.querySelector('button.btn-showall');
  if (showAllButton) {
    showAllButton.click();
  }

  overrideTimer();
  var next = document.querySelector('#next-btn:not(.btn-disabled)');
  if (next) {
    console.log("next button found, clicking");
    next.click();
  }

  var choice = document.querySelector('.choices:not(.disabledsummary)');

  if (choice) {
    choice.click();
  }

  var confidence = null;

  if (document.querySelector('div.con-question-confidence')) {
      confidence = document.querySelector('.option-wrapper:nth-child(4)>div:not(.selected)');
  }

  if (confidence) {
    confidence.click();
    var confidenceSubmit = document.querySelector('.con-option-holder-con > button:not(.disabled):not(.btn-disabled');
    if (confidenceSubmit) {
      confidenceSubmit.click();
    }
  }

  if (continueButton || quad || feedbackClose || spot || close || image || arrowNext || arrowRight || circleArrow || showAllButton || choice || confidence || appQuiz) {
    await new Promise(r => setTimeout(r, 100));
    click_buttons()
  } else if (next) {
    await new Promise(r => setTimeout(r, 1000));
    click_buttons()
  } else {
    console.log("No actionable elements found, exiting");
  }

}

function run() {
  try {
    click_buttons();
  } catch {
    click_buttons();
  }
}

run();