/**
 * @copyright  (C) 2018 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */
const SampleData = {
  inProgress: false
};
const sampledataAjax = (type, steps, step) => {
  // Get variables
  const baseUrl = `index.php?option=com_ajax&format=json&group=sampledata&${Joomla.getOptions('csrf.token')}=1`;
  const options = Joomla.getOptions('sample-data');

  // Create list
  const list = document.createElement('div');
  list.classList.add(`sampledata-steps-${type}-${step}`);
  list.setAttribute('role', 'region');
  list.setAttribute('aria-live', 'polite');

  // Create paragraph
  const para = document.createElement('p');
  para.classList.add('loader-image');
  para.classList.add('text-center');

  // Create image
  const img = document.createElement('img');
  img.setAttribute('src', options.icon);
  img.setAttribute('width', 30);
  img.setAttribute('height', 30);

  // Append everything
  para.appendChild(img);
  list.appendChild(para);
  document.querySelector(`.sampledata-progress-${type}`).appendChild(list);
  Joomla.request({
    url: `${baseUrl}&type=${type}&plugin=SampledataApplyStep${step}&step=${step}`,
    method: 'GET',
    perform: true,
    onSuccess: resp => {
      // Remove loader image
      const loader = list.querySelector('.loader-image');
      loader.parentNode.removeChild(loader);
      let response = {};
      try {
        response = JSON.parse(resp);
      } catch (e) {
        Joomla.renderMessages({
          error: [Joomla.Text._('MOD_SAMPLEDATA_INVALID_RESPONSE')]
        }, `.sampledata-steps-${type}-${step}`);
        SampleData.inProgress = false;
        return;
      }
      let progressClass = '';
      let success;
      if (response.success && response.data && response.data.length > 0) {
        const progress = document.querySelector(`.sampledata-progress-${type} .progress-bar`);

        // Display all messages that we got
        response.data.forEach(value => {
          if (value === null) {
            return;
          }

          // eslint-disable-next-line prefer-destructuring
          success = value.success;
          progressClass = success ? 'bg-success' : 'bg-danger';

          // Display success alert
          if (success) {
            Joomla.renderMessages({
              message: [value.message]
            }, `.sampledata-steps-${type}-${step}`, false, 3000);
          } else {
            Joomla.renderMessages({
              error: [value.message]
            }, `.sampledata-steps-${type}-${step}`, false);
          }
        });

        // Update progress
        progress.innerText = `${step}/${steps}`;
        progress.style.width = `${step / steps * 100}%`;
        progress.setAttribute('aria-valuemin', 0);
        progress.setAttribute('aria-valuemax', 100);
        progress.setAttribute('aria-valuenow', step / steps * 100);
        progress.classList.add(progressClass);

        // Move on next step
        if (success && step <= steps) {
          const stepNew = step + 1;
          if (stepNew <= steps) {
            sampledataAjax(type, steps, stepNew);
          } else {
            const bar = document.querySelector(`.sampledata-progress-${type}`);
            bar.parentNode.removeChild(bar);
            Joomla.renderMessages({
              message: [Joomla.Text._('MOD_SAMPLEDATA_COMPLETED')]
            });
            window.scroll({
              top: 0,
              left: 0,
              behavior: 'smooth'
            });
            SampleData.inProgress = false;
          }
        }
      } else {
        // Display error alert
        Joomla.renderMessages({
          error: [Joomla.Text._('MOD_SAMPLEDATA_INVALID_RESPONSE')]
        });
        window.scroll({
          top: 0,
          left: 0,
          behavior: 'smooth'
        });
        SampleData.inProgress = false;
      }
    },
    onError: () => {
      Joomla.renderMessages({
        error: [Joomla.Text._('MOD_SAMPLEDATA_ERROR_RESPONSE')]
      });
      window.scroll({
        top: 0,
        left: 0,
        behavior: 'smooth'
      });
      SampleData.inProgress = false;
    }
  });
};
const sampledataApply = element => {
  const type = element.getAttribute('data-type');
  const steps = element.getAttribute('data-steps');

  // Check whether the work in progress or we already processed with current item
  if (SampleData.inProgress) {
    return;
  }
  if (element.getAttribute('data-processed')) {
    alert(Joomla.Text._('MOD_SAMPLEDATA_ITEM_ALREADY_PROCESSED'));
    SampleData.inProgress = false;
    return;
  }

  // Make sure that use run this not by random clicking on the page links
  // @todo use the CE Modal here
  if (!window.confirm(Joomla.Text._('MOD_SAMPLEDATA_CONFIRM_START'))) {
    // eslint-disable-next-line consistent-return
    return false;
  }

  // Turn on the progress container
  const progressElements = [].slice.call(document.querySelectorAll(`.sampledata-progress-${type}`));
  progressElements.forEach(progressElement => {
    progressElement.classList.remove('d-none');
  });
  element.setAttribute('data-processed', true);
  SampleData.inProgress = true;
  sampledataAjax(type, steps, 1);

  // eslint-disable-next-line consistent-return
  return false;
};
const sampleDataWrapper = document.getElementById('sample-data-wrapper');
if (sampleDataWrapper) {
  const links = [].slice.call(sampleDataWrapper.querySelectorAll('.apply-sample-data'));
  links.forEach(link => {
    link.addEventListener('click', ({
      currentTarget
    }) => sampledataApply(currentTarget));
  });
}
