<!DOCTYPE html>
<html th:lang="${#locale.language}" th:dir="#{language.direction}" th:data-language="${#locale.toString()}" xmlns:th="http://www.thymeleaf.org">
  <head>
  <th:block th:insert="~{fragments/common :: head(title=#{addImage.title}, header=#{addImage.header})}"></th:block>
    <script src="js/thirdParty/interact.min.js"></script>
    <link rel="stylesheet" href="css/add-image.css">
  </head>

  <body>
    <div id="page-container">
      <div id="content-wrap">
        <th:block th:insert="~{fragments/navbar.html :: navbar}"></th:block>
        <br><br>
        <div class="container">
          <div class="row justify-content-center">
            <div class="col-md-6">
              <h2 th:text="#{addImage.header}"></h2>

              <!-- pdf selector -->
              <div th:replace="~{fragments/common :: fileSelector(name='pdf-upload', multiple=false, accept='application/pdf')}"></div>
              <script>
                let originalFileName = '';
                document.querySelector('input[name=pdf-upload]').addEventListener('change', async (event) => {
                  const file = event.target.files[0];
                  if (file) {
                    originalFileName = file.name.replace(/\.[^/.]+$/, "");
                    const pdfData = await file.arrayBuffer();
                    pdfjsLib.GlobalWorkerOptions.workerSrc = 'pdfjs/pdf.worker.js'
                    const pdfDoc = await pdfjsLib.getDocument({ data: pdfData }).promise;
                    await DraggableUtils.renderPage(pdfDoc, 0);

                    document.querySelectorAll(".show-on-file-selected").forEach(el => {
                      el.style.cssText = '';
                    });
                  }
                });
                document.addEventListener("DOMContentLoaded", () => {
                  document.querySelectorAll(".show-on-file-selected").forEach(el => {
                    el.style.cssText = "display:none !important";
                  })
                });
              </script>

              <div class="tab-group show-on-file-selected">
                <div class="tab-container" th:title="#{addImage.upload}">
                  <div th:replace="~{fragments/common :: fileSelector(name='image-upload', multiple=true, accept='image/*', inputText=#{imgPrompt})}"></div>
                  <script>
                    const imageUpload = document.querySelector('input[name=image-upload]');
                    imageUpload.addEventListener('change', e => {
                      if(!e.target.files) {
                        return;
                      }
                      for (const imageFile of e.target.files) {
                        var reader = new FileReader();
                        reader.readAsDataURL(imageFile);
                        reader.onloadend = function (e) {
                          DraggableUtils.createDraggableCanvasFromUrl(e.target.result);
                        };
                      }
                    });
                  </script>
                </div>
              </div>

              <!-- draggables box -->
              <div id="box-drag-container" class="show-on-file-selected">
                <canvas id="pdf-canvas"></canvas>
                <script src="js/draggable-utils.js"></script>
                <div class="draggable-buttons-box ignore-rtl">
                  <button class="btn btn-outline-secondary" onclick="DraggableUtils.deleteDraggableCanvas(DraggableUtils.getLastInteracted())">
                    <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-trash" viewBox="0 0 16 16">
                      <path d="M5.5 5.5A.5.5 0 0 1 6 6v6a.5.5 0 0 1-1 0V6a.5.5 0 0 1 .5-.5Zm2.5 0a.5.5 0 0 1 .5.5v6a.5.5 0 0 1-1 0V6a.5.5 0 0 1 .5-.5Zm3 .5a.5.5 0 0 0-1 0v6a.5.5 0 0 0 1 0V6Z"/>
                      <path d="M14.5 3a1 1 0 0 1-1 1H13v9a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V4h-.5a1 1 0 0 1-1-1V2a1 1 0 0 1 1-1H6a1 1 0 0 1 1-1h2a1 1 0 0 1 1 1h3.5a1 1 0 0 1 1 1v1ZM4.118 4 4 4.059V13a1 1 0 0 0 1 1h6a1 1 0 0 0 1-1V4.059L11.882 4H4.118ZM2.5 3h11V2h-11v1Z"/>
                    </svg>
                  </button>
                  <button class="btn btn-outline-secondary" onclick="document.documentElement.getAttribute('dir')==='rtl' ? DraggableUtils.incrementPage() : DraggableUtils.decrementPage()" style="margin-left:auto">
                    <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-chevron-left" viewBox="0 0 16 16">
                      <path fill-rule="evenodd" d="M11.354 1.646a.5.5 0 0 1 0 .708L5.707 8l5.647 5.646a.5.5 0 0 1-.708.708l-6-6a.5.5 0 0 1 0-.708l6-6a.5.5 0 0 1 .708 0z"/>
                    </svg>
                  </button>
                  <button class="btn btn-outline-secondary" onclick="document.documentElement.getAttribute('dir')==='rtl' ? DraggableUtils.decrementPage() : DraggableUtils.incrementPage()">
                    <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-chevron-right" viewBox="0 0 16 16">
                      <path fill-rule="evenodd" d="M4.646 1.646a.5.5 0 0 1 .708 0l6 6a.5.5 0 0 1 0 .708l-6 6a.5.5 0 0 1-.708-.708L10.293 8 4.646 2.354a.5.5 0 0 1 0-.708z"/>
                    </svg>
                  </button>
                </div>
              </div>

              <!-- download button -->
              <div class="margin-auto-parent">
                <button id="download-pdf" class="btn btn-primary mb-2 show-on-file-selected margin-center" th:text="#{downloadPdf}"></button>
              </div>
              <script>
                document.getElementById("download-pdf").addEventListener('click', async() => {
                  const modifiedPdf = await DraggableUtils.getOverlayedPdfDocument();
                  const modifiedPdfBytes = await modifiedPdf.save();
                  const blob = new Blob([modifiedPdfBytes], { type: 'application/pdf' });
                  const link = document.createElement('a');
                  link.href = URL.createObjectURL(blob);
                  link.download = originalFileName + '_addedImage.pdf';
                  link.click();
                });
              </script>
            </div>
          </div>
        </div>
      </div>
      <th:block th:insert="~{fragments/footer.html :: footer}"></th:block>
    </div>
  </body>
</html>