const bookmarklet = {
  name: "gitlab-mr-template-to-slack-message-linter",
  version: "1.0.0"
};

const jiraCompanyName = 'yourcompanynamefoundonjirasubdomian.atlassian.net';

try {
  const mrTemplate = document.getElementById('merge_request_description');
  if(mrTemplate) {
    const branchSelector = document.querySelector('.branch-selector code').textContent;
    const ticketId = `${branchSelector.split('-')[0].replace(/^(.*\/)/,'')}-${branchSelector.split('-')[1]}`;
    mrTemplate.value = `## Summary
-

Jira Ticket: ${/(([a-z])+\-([0-9])+)/.test(ticketId) ? `https://${jiraCompanyName}.atlassian.net/browse/${ticketId.toUpperCase()}` : ''}

Reviewers: 
`;
  } else {
    const mrLink = window.location.href;
    const branch = document.querySelector('.author-link.js-user-link + .ref-container').getAttribute("title");
    const branchDestination = document.querySelector('.detail-page-description .ref-container:last-of-type').getAttribute("title");
    const ticket = document.querySelector(`a[href*="https://${jiraCompanyName}.atlassian.net/browse/"]`);
    const listItems = [].slice.call(document.querySelectorAll('.description .md ul:not(.task-list) li'));
    const descriptionText = [].slice.call(document.querySelectorAll('.description .md p'));
    const list = listItems.map(listItem => `> - ${listItem.textContent.replace(',', '')}\n`).join('');
    
    const reviewers = () => {
      const text = descriptionText.map(content => content.textContent);
      const content = text.filter(reviewer => reviewer.match('@'));
      if (!content.length) {
        return 'No Reviewers Found';
      }
      return content[0].replace('Reviewers: ', '');
    };
    const squashed = document.querySelector('.js-commits-count').textContent;
    const pipline = document.querySelector('.ci-icon-gl-icon-wrapper > svg > use').href.baseVal;
    const changes = document.querySelector('[data-action="diffs"] > span').textContent.trim();
    const diff = document.querySelector('[data-action="diffs"]').href;
    const repo = document.querySelector('nav .breadcrumb li:nth-child(2) span').textContent;
    const pipelineStatus = pipelineString => {
      if(pipelineString.includes('status_success')) return ':successful:';
      if(pipelineString.includes('status_warning')) return ':warning:';
      if(pipelineString.includes('status_failed')) return ':failed:';
      if(pipelineString.includes('status_running')) return ':macos-loading-wheel:';
    };
    navigator.clipboard.writeText(`:git: *${repo}* [MR](${mrLink}) *${branch}* _into_ *${branchDestination}*
> *Squashed*:  ${squashed === '1' ? ':successful:' : ':failed:'}
> *Pipeline*:     ${pipelineStatus(pipline)}
> *Jira Ticket*:  ${ticket !== null ? `[link](${ticket})` : ':failed:'}
> *Changes*: ${changes} [diff](${diff})
> *Reviewers*:  ${reviewers()}
${listItems.length === 0 ? 'No List Items Found' : list}`);
  }
  console.log(`${bookmarklet.name}: ${bookmarklet.version}`);
} catch(error) {
    console.log(`${bookmarklet.name} : ${bookmarklet.version} : ${error}`);
}