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import Cropper from 'cropper-module';

/**
 * @copyright  (C) 2018 Open Source Matters, Inc.
<https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see
LICENSE.txt
 */
let formElements;
let activated = false;
let instance;
const addListeners = () => {
  formElements.cropX.addEventListener('change', ({
    currentTarget
  }) => {
    instance.setData({
      x: parseInt(currentTarget.value, 10)
    });
  });
  formElements.cropY.addEventListener('change', ({
    currentTarget
  }) => {
    instance.setData({
      y: parseInt(currentTarget.value, 10)
    });
  });
  formElements.cropWidth.addEventListener('change', ({
    currentTarget
  }) => {
    instance.setData({
      width: parseInt(currentTarget.value, 10)
    });
  });
  formElements.cropHeight.addEventListener('change', ({
    currentTarget
  }) => {
    instance.setData({
      height: parseInt(currentTarget.value, 10)
    });
  });
  formElements.aspectRatio.addEventListener('change', ({
    currentTarget
  }) => {
    instance.setAspectRatio(currentTarget.value);
  });
  activated = true;
};
const init = image => {
  // Set default aspect ratio after numeric check, option has a dummy value
  const defaultCropFactor = image.naturalWidth / image.naturalHeight;
  if (!Number.isNaN(defaultCropFactor) &&
Number.isFinite(defaultCropFactor)) {
    formElements.cropAspectRatioOption.value = defaultCropFactor;
  }

  // Initiate the cropper
  instance = new Cropper(image, {
    viewMode: 1,
    responsive: true,
    restore: true,
    autoCrop: true,
    movable: false,
    zoomable: false,
    rotatable: false,
    autoCropArea: 1,
    // scalable: false,
    crop(e) {
      formElements.cropX.value = Math.round(e.detail.x);
      formElements.cropY.value = Math.round(e.detail.y);
      formElements.cropWidth.value = Math.round(e.detail.width);
      formElements.cropHeight.value = Math.round(e.detail.height);
      const format =
Joomla.MediaManager.Edit.original.extension.toLowerCase() ===
'jpg' ? 'jpeg' :
Joomla.MediaManager.Edit.original.extension.toLowerCase();
      const quality = formElements.cropQuality.value;

      // Update the store
      Joomla.MediaManager.Edit.current.contents =
this.cropper.getCroppedCanvas().toDataURL(`image/${format}`, quality);

      // Notify the app that a change has been made
      window.dispatchEvent(new
Event('mediaManager.history.point'));
    }
  });

  // Add listeners
  if (!activated) {
    addListeners();
  }
  instance.setAspectRatio(formElements.cropAspectRatioOption.value);
};

// Register the Events
window.addEventListener('media-manager-edit-init', () => {
  formElements = {
    aspectRatio: document.getElementById('jform_aspectRatio'),
    cropHeight: document.getElementById('jform_crop_height'),
    cropWidth: document.getElementById('jform_crop_width'),
    cropY: document.getElementById('jform_crop_y'),
    cropX: document.getElementById('jform_crop_x'),
    cropQuality: document.getElementById('jform_crop_quality'),
    cropAspectRatioOption:
document.querySelector('.crop-aspect-ratio-option')
  };
  Joomla.MediaManager.Edit.plugins.crop = {
    Activate(image) {
      return new Promise((resolve /* , reject */) => {
        init(image);
        resolve();
      });
    },
    Deactivate(image) {
      return new Promise((resolve /* , reject */) => {
        if (image.cropper) {
          image.cropper.destroy();
          instance = null;
        }
        resolve();
      });
    }
  };
}, {
  once: true
});