content.js

// content.js (your content script)
document.addEventListener("keydown", function (event) {
  // Check if the Enter key is pressed
  if (event.key === "Enter" || event.code === "Enter") {
    chrome.storage?.sync.get({ interaleksEnableEnter: true }, (data) => {
      if (!data?.interaleksEnableEnter) return;
      event.preventDefault(); // Prevent default Enter behavior
      handleEnterKeyPress();
    });
  }
});

// Detect ALEKS cookie-block page and redirect to login based on preference
function checkAndRedirect() {
  try {
    const pageTitle = (document.title || "").toLowerCase();
    const bodyText = (document.body?.innerText || "").toLowerCase();

    const titleIndicators = [
      "session closed",
      "aleks - session closed",
      "aleks - sorry, this page cannot be displayed due to your browser setting.",
    ];
    const bodyIndicators = [
      "cookies are blocked or not supported.",
      "sorry, this page cannot be displayed due to your browser setting.",
      "session closed",
      "this session is closed",
    ];

    const titleMatch = titleIndicators.some((phrase) =>
      pageTitle.includes(phrase)
    );
    const bodyMatch = bodyIndicators.some((phrase) =>
      bodyText.includes(phrase)
    );
    const isBlockedPage = titleMatch || bodyMatch;

    if (!isBlockedPage) return;

    console.log("InterALEKS: Redirecting...");
    chrome.storage?.sync.get({ interaleksLoginMethod: "aleks" }, (data) => {
      const method = data?.interaleksLoginMethod || "aleks";
      const targets = {
        aleks: "https://www.aleks.com/login",
        mcgrawhill: "https://my.mheducation.com/login/",
      };
      const targetUrl = targets[method] || targets.aleks;
      if (typeof window !== "undefined" && targetUrl) {
        window.location.replace(targetUrl);
      }
    });
  } catch (err) {
    console.error("InterALEKS redirect error", err);
  }
}

// Wait for page to be fully loaded before checking
function runCheckWithDelay() {
  chrome.storage?.sync.get(
    { interaleksEnableRedirect: true, interaleksRedirectDelayMs: 3000 },
    (data) => {
      if (!data?.interaleksEnableRedirect) return;
      checkAndRedirect();
      const delay = Number(data?.interaleksRedirectDelayMs) || 0;
      if (delay > 0) setTimeout(checkAndRedirect, delay);
    }
  );
}

if (document.readyState === "loading") {
  document.addEventListener("DOMContentLoaded", runCheckWithDelay);
} else if (document.readyState === "interactive") {
  // DOM is loaded but resources might still be loading
  window.addEventListener("load", runCheckWithDelay);
} else {
  // Page is already fully loaded
  runCheckWithDelay();
}

function handleEnterKeyPress() {
  // Check if blocking element is present and visible
  const blockingElement = document.getElementById("ej9lur1fx5");
  if (
    blockingElement &&
    blockingElement.style.display !== "none" &&
    blockingElement.offsetParent !== null
  ) {
    return; // Disable Enter system when blocking element is visible
  }

  // Check if Calculator heading is visible
  const calculatorHeadings = document.querySelectorAll(
    '[role="heading"][aria-level="2"]'
  );
  for (const heading of calculatorHeadings) {
    if (
      heading.textContent.trim() === "Calculator" &&
      heading.style.display !== "none" &&
      heading.offsetParent !== null
    ) {
      const shouldBlock = true; // honor popup toggle if present
      if (shouldBlock) return; // Disable Enter system when Calculator is visible
    }
  }

  // Helper function to check if button is visible and clickable
  function isButtonClickable(el) {
    if (!el) return false;
    if (el.disabled) return false;
    if (el.style.display === "none") return false;
    if (el.offsetParent === null) return false; // Check if element is actually visible
    return true;
  }

  // Priority order as requested: Start now, Submit, Start, Continue my path, Check, Next, Try another, Check, Continue
  const idsInPriorityOrder = [
    // Start now
    "smt_bottomnav_button_input_goto_placement",
    // Submit
    "smt_bottomnav_button_input_nextItemAssess",
    "smt_bottomnav_button_input_submit",
    // Start
    "smt_bottomnav_button_input_startAssignment",
    "smt_bottomnav_button_input_startPrep",
    // Continue my path
    "smt_bottomnav_button_input_newItem",
    // Check (both variants)
    "smt_bottomnav_button_input_checkAnswer",
    "smt_bottomnav_button_input_nextItem",
    // Continue (variants)
    "smt_bottomnav_button_input_startItem",
    "smt_bottomnav_button_input_continue",
    // Next (several variants)
    "smt_bottomnav_button_input_learningCorrect",
    "smt_bottomnav_button_input_nextQuestionAssignment",
    "smt_bottomnav_button_input_next",
    "smt_bottomnav_button_input_nextPage",
    "smt_bottomnav_button_input_nextSurvey",
    // Try another - moved higher in priority for completed problems
    "smt_bottomnav_button_input_tryAnother",
    // Check again (fallback)
    "smt_bottomnav_button_input_checkAnswer",
    // Generic learning/next
    "smt_bottomnav_button_input_learning",
  ];

  for (const id of idsInPriorityOrder) {
    const el = document.getElementById(id);
    if (isButtonClickable(el)) {
      el.click();
      return;
    }
  }
}