function createContentTheme({
  THEME_STORAGE_KEY,
  createThemeIcon,
  environment
}) {
  const getLocalStorage = () => environment.localStorage;
  function getSavedTheme() {
    try {
      return getLocalStorage().getItem(THEME_STORAGE_KEY) === "dark" ? "dark" : "light";
    } catch (error) {
      return "light";
    }
  }

  function applyTheme(modal, button, theme) {
    const isDarkTheme = theme === "dark";

    modal.setAttribute("data-theme", isDarkTheme ? "dark" : "light");
    button.textContent = "";
    button.setAttribute("aria-label", isDarkTheme ? "Ativar modo claro" : "Ativar modo escuro");
    button.title = isDarkTheme ? "Light mode" : "Dark mode";
    button.append(createThemeIcon(isDarkTheme ? "sun" : "moon"));

    try {
      getLocalStorage().setItem(THEME_STORAGE_KEY, isDarkTheme ? "dark" : "light");
    } catch (error) {
      // Continue with the selected theme when browser storage is unavailable.
    }
  }

  return { getSavedTheme, applyTheme };
}