// static/js/confirm_external_links.js
// This script is designed to handle external links on a webpage by showing a confirmation modal
// before allowing the user to navigate to the external URL.

// Wait for the DOM content to be fully loaded before executing the script.
document.addEventListener("DOMContentLoaded", function () {

    // Select all anchor elements with 'href' attributes starting with 'http' that do not contain
    // the current window's host domain.
    var externalLinks = document.querySelectorAll("a[href^='http']:not([href*='" + window.location.host + "'])");

    // Loop through each external link found on the page.
    for (var i = 0; i < externalLinks.length; i++) {

        // Attach a click event listener to each external link.
        externalLinks[i].addEventListener("click", function (event) {
            event.preventDefault(); // Prevent the default behavior of clicking a link.

            // Create a Bootstrap modal instance for the external link confirmation.
            var confirmationModal = new bootstrap.Modal(document.getElementById('externalLinkConfirmationModal'), {
                keyboard: false // Disable closing the modal with the keyboard.
            });

            // Get references to elements within the modal.
            var externalLink = document.getElementById('externalLink');
            var externalLinkShow = document.getElementById('externalLinkShow');
            var originalLink = this.href; // Get the original URL of the clicked external link.

            // Set the 'href' attribute of the element that will open the link.
            externalLink.setAttribute('href', originalLink);

            // Update the content of an element to display the external link's URL.
            externalLinkShow.innerText = "URL: " + this.href;

            // Show the confirmation modal.
            confirmationModal.show();

            // Attach a click event listener to the 'externalLink' element to hide the modal when clicked.
            externalLink.addEventListener('click', function () {
                confirmationModal.hide(); // Hide the confirmation modal.
            });
        });
    }
});