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// Cashier iframe: postMessage bridge (height sync + GA events)
(function () {
  if (window.__CASHIER_BRIDGE_INIT__) return;
  window.__CASHIER_BRIDGE_INIT__ = true;

  window.addEventListener("message", handleMessage, false);

  function handleMessage(event) {
    const data = parseAsJsonIfString(event.data);
    if (!data) return;

    window.dataLayer = window.dataLayer || [];

    if (data.type === 'fixHeight') {
      handleFixHeightMessage(data, event.source);
      return;
    }

    handleGaEventMessage(data);
  }

  // --- "fixHeight" message: resize the cashier iframe ---

  function handleFixHeightMessage(data, sourceWindow) {
    try {
      setIframeHeight(data.height, sourceWindow);
    } catch (error) {
      console.error("An error occurred in handleFixHeightMessage:", error);
    }
  }

  // Multiple cashier containers can exist at once (e.g. deposit page + modal),
  // so the iframe that actually sent the message is matched by its contentWindow
  // instead of picking the first container/iframe found in the DOM.
  function findIframeBySourceWindow(sourceWindow) {
    const containers = document.querySelectorAll('[data-organism="ComponentPlayerAccountCashier"]');

    for (const container of containers) {
      const iframe = container.querySelector('iframe');
      if (iframe && iframe.contentWindow === sourceWindow) {
        return iframe;
      }
    }

    return null;
  }

  function setIframeHeight(height, sourceWindow) {
    try {
      const iframe = findIframeBySourceWindow(sourceWindow);
      if (!iframe) {
        console.warn("Cashier iframe matching message source not found");
        return;
      }

      const iframeWrapper = iframe.parentElement?.parentElement;
      if (iframeWrapper) {
        iframeWrapper.style.height = height;
      } else {
        console.warn("Iframe wrapper not found");
      }
    } catch (error) {
      // console.error("An error occurred in setIframeHeight:", error);
    }
  }

  // --- GA event message: forward cashier events to dataLayer ---

  function handleGaEventMessage(data) {
    try {
      if (data.gaevent) {
        forwardGaEvent(data);
        return;
      }

      if (data.event === "deposit_number" && data.depositNumber !== undefined) {
        rememberDepositNumber(data.depositNumber);
        return;
      }

      console.warn("No gaevent object in event data.");
    } catch (error) {
      console.error("An error occurred in handleGaEventMessage:", error);
    }
  }

  function parseAsJsonIfString(rawData) {
    if (typeof rawData !== "string") return rawData;

    try {
      return JSON.parse(rawData);
    } catch (error) {
      console.warn("Failed to parse event data as JSON:", rawData);
      return null;
    }
  }

  function forwardGaEvent(data) {
    const gaEvent = data.gaevent;

    if (gaEvent.depositNumber !== undefined) {
      rememberDepositNumber(gaEvent.depositNumber);
    }

    if (!data.gatime || !gaEvent.event) {
      console.warn("gatime or event name is missing in gaEventData:", data);
      return;
    }

    const storedEvents = getStoredEvents();

    if (isDuplicateEvent(storedEvents, data.gatime, gaEvent.event)) {
      console.warn("Duplicate event detected:", data);
      return;
    }

    rememberEvent(storedEvents, data.gatime, gaEvent.event);
    pushToDataLayer(gaEvent);
  }

  function rememberDepositNumber(depositNumber) {
    sessionStorage.setItem("lastDepositNumber", depositNumber);
  }

  function getStoredEvents() {
    return JSON.parse(sessionStorage.getItem("storedEvents")) || [];
  }

  function isDuplicateEvent(storedEvents, gatime, eventName) {
    return storedEvents.some(
      (storedEvent) => storedEvent.gatime === gatime && storedEvent.event === eventName
    );
  }

  function rememberEvent(storedEvents, gatime, eventName) {
    storedEvents.push({ gatime, event: eventName });

    const maxStoredEvents = 100;
    if (storedEvents.length > maxStoredEvents) {
      storedEvents.shift();
    }

    sessionStorage.setItem("storedEvents", JSON.stringify(storedEvents));
  }

  function pushToDataLayer(gaEvent) {
    const dataLayerObject = { event: gaEvent.event };

    for (const key in gaEvent) {
      if (gaEvent.hasOwnProperty(key) && key !== "event") {
        dataLayerObject[key] = gaEvent[key];
      }
    }

    if (typeof dataLayer !== "undefined" && Array.isArray(dataLayer) && dataLayerObject.event !== "deposit_number") {
      dataLayer.push(dataLayerObject);
    } else {
      console.error("dataLayer is not defined or not an array");
    }
  }
})();

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