(function () {
  'use strict';

  function apiFolderPath(path) {
    return (path || '')
      .replace(/^\/+/, '')
      .split('/')
      .map(encodeURIComponent)
      .join('/');
  }

  function parentFolder(path) {
    var index = path.lastIndexOf('/');
    return index < 0 ? '' : path.slice(0, index);
  }

  function baseName(path) {
    var index = path.lastIndexOf('/');
    return index < 0 ? path : path.slice(index + 1);
  }

  function postFolder(path, operation, body) {
    return fetch('/api/folders/' + apiFolderPath(path) + '/' + operation, {
      method: 'POST',
      credentials: 'same-origin',
      headers: body ? { 'Content-Type': 'application/json' } : undefined,
      body: body ? JSON.stringify(body) : undefined,
    }).then(function (response) {
      return response.json().then(function (data) {
        if (!response.ok) throw new Error(data.error || 'Folder operation failed');
        return data;
      });
    });
  }

  function closeMenu(button) {
    var details = button.closest('details');
    if (details) details.removeAttribute('open');
  }

  document.addEventListener('click', function (event) {
    var renameButton = event.target.closest('[data-folder-rename-path]');
    if (renameButton) {
      var renamePath = renameButton.getAttribute('data-folder-rename-path');
      var newName = window.prompt('Rename folder to:', baseName(renamePath));
      if (newName === null) return;
      newName = newName.trim().replace(/^\/+|\/+$/g, '');
      if (newName === '' || newName === baseName(renamePath)) return;
      var parent = parentFolder(renamePath);
      var renameDestination = (parent ? parent + '/' : '') + newName;
      renameButton.disabled = true;
      postFolder(renamePath, 'move', { path: renameDestination })
        .then(function (data) {
          window.location.assign(data.url);
        })
        .catch(function (error) {
          window.alert(error.message || 'Failed to rename folder');
          renameButton.disabled = false;
        });
      return;
    }

    var moveButton = event.target.closest('[data-folder-move-path]');
    if (moveButton) {
      var movePath = moveButton.getAttribute('data-folder-move-path');
      var destination = window.prompt('Move folder to:', movePath);
      if (destination === null) return;
      destination = destination.trim().replace(/^\/+|\/+$/g, '');
      if (destination === '' || destination === movePath) return;
      moveButton.disabled = true;
      postFolder(movePath, 'move', { path: destination })
        .then(function (data) {
          window.location.assign(data.url);
        })
        .catch(function (error) {
          window.alert(error.message || 'Failed to move folder');
          moveButton.disabled = false;
        });
      return;
    }

    var archiveButton = event.target.closest('[data-folder-archive-path]');
    if (archiveButton) {
      var archivePath = archiveButton.getAttribute('data-folder-archive-path');
      if (!archivePath) return;
      if (!window.confirm('Archive this folder and all its documents? They will be hidden from the site but can be restored later.')) {
        return;
      }
      archiveButton.disabled = true;
      closeMenu(archiveButton);
      postFolder(archivePath, 'archive')
        .then(function () {
          window.location.assign('/');
        })
        .catch(function (error) {
          window.alert(error.message || 'Failed to archive folder');
          archiveButton.disabled = false;
        });
    }
  });
})();