const expandedClass = "e-content--expanded";

export function toggleContentExpanded(id) {
  const content = document.querySelector(`[data-content-id="${id}"]`);
  const button = document.querySelector(`[data-content-id="${id}"] + button`);

  if (!content) {
    throw new Error(`No content found with ID: ${id}`);
  }
  const classes = content.getAttribute("class").split(" ");
  const wasExpanded = classes.includes(expandedClass);
  if (wasExpanded) {
    const newClasses = classes.filter((c) => c != expandedClass);
    content.setAttribute("class", newClasses.join(" "));
  } else {
    content.setAttribute("class", [...classes, expandedClass].join(" "));
  }

  if (!button) {
    console.warn(
      `Toggled content expansion, but no button next to content with ID: ${id}`,
    );
  } else {
    if (wasExpanded) {
      button.textContent = "Read more";
    } else {
      button.textContent = "Read less";
    }
  }
}

export function addExpandItemButtons() {
  for (const content of document.querySelectorAll(".e-content")) {
    const contentId = crypto.randomUUID();
    content.setAttribute("data-content-id", contentId);
    const button = document.createElement("button");
    button.textContent = "Read more";
    button.addEventListener("click", () => toggleContentExpanded(contentId));
    content.insertAdjacentElement("afterend", button);
  }
}