(function() {
  jQuery.fn.isAfter = function(sel){
    return this.prevAll().filter(sel).length !== 0;
  };
  
  jQuery.fn.isBefore= function(sel){
    return this.nextAll().filter(sel).length !== 0;
  };
  
  function loadDataJSON(issueKey, callback) {
  
    //https://docs.atlassian.com/jira/REST/latest/
    var url = '/rest/api/2/issue/' + issueKey + '?fields=summary,issuelinks';
    //console.log("IssueUrl: " + window.location.hostname + url);
    //console.log("Issue: " + issueKey + " Loading...");
    return  jQuery.ajax({
      type: 'GET',
      url: url,
      dataType: 'json',
      success: function(responseData){
        //console.log("Issue: " + issueKey + " Loaded!");
        callback(responseData);
      },
      data: {},
    });
  }
  
  function checkDependencies(){
    // reomve old warnings first
    jQuery('.blocked-warning').remove();
    // check for dependencies
    jQuery('[data-issue-key]').each(function() {
      var issueElement = jQuery(this);
      var issueKey = issueElement.attr('data-issue-key');
      loadDataJSON(issueKey, function(responseData){
        var issueLinks = responseData.fields.issuelinks;
        jQuery.each(issueLinks,function(position, issue) {
          if(issue.type.name == "Blocker" && issue.inwardIssue){
            var dependencyIssueKey = issue.inwardIssue.key;
            if (issueElement.isBefore('[data-issue-key='+dependencyIssueKey+']')) {
              issueElement.find('.ghx-end.ghx-row')
                .prepend('<span class="blocked-warning aui-label ghx-label-2 ghx-label ghx-label-double" title="'+ issue.type.inward + ' ' + dependencyIssueKey + '" style="color: FIREBRICK; background-color: white; border-color: FIREBRICK; font-weight: bold; border-width: 2px; ">↯ '+dependencyIssueKey+'</span>')
              //issueElement.css('background-color', '#FFD351');
             }
          }
        })
      })
    });
  }
  
  checkDependencies();
})();