---
// ImageModal.astro - A reusable modal component for displaying enlarged images
---

<div
  id="image-modal"
  class="fixed inset-0 z-50 flex items-center justify-center opacity-0 pointer-events-none transition-opacity duration-300 ease-in-out"
>
  <!-- Backdrop overlay -->
  <div
    id="modal-backdrop"
    class="absolute inset-0 bg-black bg-opacity-75 backdrop-blur-sm transition-opacity duration-300"
  >
  </div>

  <!-- Modal container with animation -->
  <div
    id="modal-container"
    class="fixed top-1/2 left-1/2 z-60 max-w-4xl w-full p-4 transform -translate-x-1/2 -translate-y-1/2 scale-95 transition-all duration-300 ease-in-out flex flex-col items-center overflow-y-auto"
    style="max-height: 90vh;"
  >
    <!-- Close button -->
    <button
      id="modal-close"
      class="absolute top-2 right-2 z-10 bg-white dark:bg-gray-800 rounded-full p-2 shadow-md hover:bg-gray-100 dark:hover:bg-gray-700 transition-colors duration-200"
      aria-label="Close modal"
    >
      <svg
        xmlns="http://www.w3.org/2000/svg"
        class="h-6 w-6 text-gray-600 dark:text-gray-300"
        fill="none"
        viewBox="0 0 24 24"
        stroke="currentColor"
      >
        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12"></path>
      </svg>
    </button>

    <!-- Enlarged Image at the Top -->
    <img
      id="modal-image"
      src=""
      alt="Enlarged certificate"
      class="w-auto object-contain max-h-[60vh] mb-4 mx-auto"
      style="vertical-align: middle;"
    />

    <!-- Caption -->
    <div id="modal-caption" class="mt-2 text-center text-white text-lg font-medium"></div>
  </div>
</div>

<script>
  // Declare the global function type
  declare global {
    interface Window {
      openImageModal: (imgSrc: string, imgAlt: string) => void;
    }
  }

  // Initialize modal functionality when the DOM is loaded
  document.addEventListener('DOMContentLoaded', () => {
    const modal = document.getElementById('image-modal');
    const modalBackdrop = document.getElementById('modal-backdrop');
    const modalContainer = document.getElementById('modal-container');
    const modalImage = document.getElementById('modal-image') as HTMLImageElement;
    const modalCaption = document.getElementById('modal-caption');
    const closeButton = document.getElementById('modal-close');

    // Function to open the modal with a specific image
    function openModal(imgSrc, imgAlt) {
      if (!modal || !modalImage || !modalCaption) return;

      // Create a temporary image to get the natural dimensions
      const tempImg = new Image();
      tempImg.onload = function () {
        // Calculate the certification section height (75% of viewport height as defined in the container)
        const certSectionHeight = window.innerHeight * 0.75;
        const maxHeight = certSectionHeight * 0.75; // 75% of the certification section height

        // If the natural image height is smaller than the max height, use the natural height
        if (tempImg.height < maxHeight) {
          modalImage.style.setProperty('--cert-max-height', `${tempImg.height}px`);
        } else {
          modalImage.style.setProperty('--cert-max-height', `${maxHeight}px`);
        }

        // Set the image source and alt text
        modalImage.src = imgSrc;
        modalCaption.textContent = imgAlt;

        // Make the modal visible
        modal.classList.remove('opacity-0', 'pointer-events-none');
        modal.classList.add('opacity-100', 'pointer-events-auto');

        // Animate the container
        if (modalContainer) {
          modalContainer.classList.remove('scale-95');
          modalContainer.classList.add('scale-100');
        }

        // Set focus to the close button for accessibility
        if (closeButton) {
          setTimeout(() => closeButton.focus(), 100);
        }
      };

      // Start loading the image
      tempImg.src = imgSrc;

      // Prevent scrolling on the body
      document.body.style.overflow = 'hidden';
    }

    // Function to close the modal
    function closeModal() {
      if (!modal || !modalContainer) return;

      // Hide the modal with animation
      modal.classList.remove('opacity-100', 'pointer-events-auto');
      modal.classList.add('opacity-0', 'pointer-events-none');

      // Animate the container
      modalContainer.classList.remove('scale-100');
      modalContainer.classList.add('scale-95');

      // Re-enable scrolling
      document.body.style.overflow = '';

      // Clear the image source after animation completes
      setTimeout(() => {
        if (modalImage) modalImage.src = '';
        if (modalCaption) modalCaption.textContent = '';
      }, 300);
    }

    // Register the openImageModal function globally so it can be called from anywhere
    window.openImageModal = openModal;

    // Close modal when clicking the close button
    if (closeButton) {
      closeButton.addEventListener('click', (e) => {
        e.preventDefault();
        closeModal();
      });
    }

    // Close modal when clicking outside the image container
    if (modal) {
      modal.addEventListener('click', (e) => {
        // Check if the click was on the modal backdrop or the modal itself (not on its children)
        if (e.target === modal || e.target === modalBackdrop) {
          closeModal();
        }
      });
    }

    // Close modal when pressing Escape key
    document.addEventListener('keydown', (e) => {
      if (e.key === 'Escape') {
        closeModal();
      }
    });

    // Handle window resize to recalculate image dimensions
    let resizeTimeout;
    window.addEventListener('resize', () => {
      clearTimeout(resizeTimeout);
      resizeTimeout = setTimeout(() => {
        if (modalImage && modalImage.src && modal && modal.classList.contains('opacity-100')) {
          // Get current image source and recalculate dimensions
          const currentSrc = modalImage.src;
          const currentAlt = modalCaption?.textContent || '';

          // Close and reopen modal to trigger recalculation
          closeModal();
          setTimeout(() => openModal(currentSrc, currentAlt), 350);
        }
      }, 200); // Debounce resize events
    });
  });
</script>