{% extends "@Contao/frontend_module/_base.html.twig" %}

{% block content %}
  {% if error is defined and error %}
    <p role="alert">{{ error }}</p>
    <p><a href="{{ backUrl }}">Zurück</a></p>
  {% elseif form is defined and form %}
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/choices.js/public/assets/styles/choices.min.css">
    <link rel="stylesheet" href="https://unpkg.com/filepond/dist/filepond.min.css">
    <link rel="stylesheet" href="https://unpkg.com/filepond-plugin-image-preview/dist/filepond-plugin-image-preview.min.css">
    <script src="https://cdn.jsdelivr.net/npm/choices.js/public/assets/scripts/choices.min.js"></script>
    <script src="https://unpkg.com/filepond/dist/filepond.min.js"></script>
    <script src="https://unpkg.com/filepond-plugin-image-preview/dist/filepond-plugin-image-preview.min.js"></script>

    {{ form_start(form, { attr: { 'aria-live': 'polite' } }) }}
      <input type="hidden" name="REQUEST_TOKEN" value="{{ requestToken }}">
      <input type="hidden" id="remove_logo" name="remove_logo" value="0">
      {{ form_widget(form) }}
      <div class="actions" aria-label="Formularaktionen">
        <button type="submit" id="save-btn" disabled>Speichern</button>
        <button type="submit" id="save-back-btn" name="save_back" value="1" disabled>Speichern und Zurück</button>
        <a href="{{ backUrl }}" aria-label="Zurück zur vorherigen Seite">Zurück</a>
      </div>
    {{ form_end(form) }}

    <script>
      (function () {
        const typeSelect = document.querySelector('select.js-organization-tags-choice');

        if (typeSelect && typeof window.Choices === 'function') {
          new window.Choices(typeSelect, {
            searchEnabled: false,
            shouldSort: false,
            removeItemButton: true,
            itemSelectText: '',
            placeholder: true,
            placeholderValue: typeSelect.dataset.placeholder || 'Typ auswählen …',
            noResultsText: 'Keine Treffer',
            noChoicesText: 'Keine Optionen verfügbar'
          });
        }

        const currentLogoPath = {{ (currentLogoPath is defined and currentLogoPath) ? ('/' ~ currentLogoPath)|json_encode|raw : 'null' }};
        const logoInput = document.querySelector('input.js-logo-upload');
        const removeLogoInput = document.getElementById('remove_logo');
        const hadInitialLogo = !!currentLogoPath;
        let pondDirty = false;

        const form = document.querySelector('form');
        const saveButton = document.getElementById('save-btn');
        const saveBackButton = document.getElementById('save-back-btn');
        if (!form || !saveButton || !saveBackButton) {
          return;
        }

        const initial = new FormData(form);
        const hasChanges = () => {
          const current = new FormData(form);
          for (const [key, value] of current.entries()) {
            if (initial.getAll(key).join(',') !== current.getAll(key).join(',')) {
              return true;
            }
          }
          return false;
        };
        const updateButtons = () => {
          const changed = hasChanges() || pondDirty;
          saveButton.disabled = !changed;
          saveBackButton.disabled = !changed;
        };

        if (logoInput && typeof window.FilePond !== 'undefined') {
          if (typeof window.FilePondPluginImagePreview !== 'undefined') {
            window.FilePond.registerPlugin(window.FilePondPluginImagePreview);
          }

          const filePondOptions = {
            instantUpload: false,
            storeAsFile: true,
            allowMultiple: false,
            allowReplace: true,
            credits: false,
            acceptedFileTypes: ['image/*'],
            labelIdle: 'Logo hierher ziehen oder <span class="filepond--label-action">durchsuchen</span>'
          };

          if (currentLogoPath) {
            filePondOptions.files = [
              {
                source: currentLogoPath,
                options: {
                  type: 'local'
                }
              }
            ];

            filePondOptions.server = {
              load: (source, load, error, progress, abort) => {
                const xhr = new XMLHttpRequest();
                xhr.open('GET', source);
                xhr.responseType = 'blob';
                xhr.onload = function () {
                  if (xhr.status >= 200 && xhr.status < 300) {
                    load(xhr.response);
                  } else {
                    error('Laden fehlgeschlagen');
                  }
                };
                xhr.onerror = function () {
                  error('Laden fehlgeschlagen');
                };
                xhr.send();

                return {
                  abort: () => {
                    xhr.abort();
                    abort();
                  }
                };
              }
            };
          }

          const pond = window.FilePond.create(logoInput, filePondOptions);

          const syncPondState = () => {
            const files = pond.getFiles();
            const hasLocalFile = files.some((file) => window.FilePond.FileOrigin && file.origin === window.FilePond.FileOrigin.LOCAL);
            const hasNewFile = files.some((file) => window.FilePond.FileOrigin && file.origin !== window.FilePond.FileOrigin.LOCAL);

            pondDirty = hasNewFile || (hadInitialLogo && !hasLocalFile);

            if (removeLogoInput) {
              removeLogoInput.value = hadInitialLogo && !hasLocalFile && !hasNewFile ? '1' : '0';
            }

            updateButtons();
          };

          syncPondState();

          pond.on('removefile', function (error, file) {
            if (error) {
              return;
            }

            syncPondState();
          });

          pond.on('addfile', function () {
            syncPondState();
          });

          pond.on('updatefiles', function () {
            syncPondState();
          });
        }
        form.addEventListener('input', function () {
          updateButtons();
        });
        form.addEventListener('change', function () {
          updateButtons();
        });
      })();
    </script>
  {% else %}
    <p>Kein Formular verfügbar.</p>
  {% endif %}
{% endblock %}