(function(exports) {

  if (location != 'chrome://messenger/content/messenger.xhtml') return;

  const { ThreadPaneColumns } = ChromeUtils.importESModule("chrome://messenger/content/ThreadPaneColumns.mjs");

  let myAddr=new Array();
  for (const acct of MailServices.accounts.accounts)
    for (const iden of acct.identities)
      myAddr.push(iden.fullAddress);  //.email
  myAddr=[...new Set(myAddr)];

  function easyPeasy_addColumn(id, name, callback) {
console.log('add column "'+name+'"');
    if (ThreadPaneColumns.getColumn(id))
      ThreadPaneColumns.removeCustomColumn(id);
    ThreadPaneColumns.addCustomColumn(id, {
      name: name,
      hidden: false, //initiallyHidden,
      icon: false,
      resizable: true,
      sortable: true,
      textCallback: callback,
    });
  }

  easyPeasy_addColumn('EasyPeasy_DateTime', 'Datum      Zeit', (message)=>{
    const date=new Date();
    date.setTime(message.date/1000);
    return date.toLocaleDateString(undefined, {year: "numeric", month: "2-digit", day: "2-digit"})+'  '+date.toLocaleTimeString().substring(0,5);
  });
  easyPeasy_addColumn('EasyPeasy_Adressen', 'Mailadresse', (message)=>{
    let addr;
    if (myAddr.includes(message.mime2DecodedAuthor))
      addr=message.mime2DecodedRecipients;  //outgoing
    else
      addr=message.mime2DecodedAuthor;      //incoming
    return MailServices.headerParser
            .parseDecodedHeader(addr)
            .map(hdr => hdr.email || undefined).join('; ');
  });
  easyPeasy_addColumn('EasyPeasy_Namen', 'Name', (message)=>{
    let addr;
    if (myAddr.includes(message.mime2DecodedAuthor))
      addr=message.mime2DecodedRecipients;  //outgoing
    else
      addr=message.mime2DecodedAuthor;      //incoming
    return MailServices.headerParser
            .parseDecodedHeader(addr)
            .map(hdr => hdr.name || undefined).join('; ');
  });
  easyPeasy_addColumn('EasyPeasy_Gesendet', 'Gesendet', (message)=>{
    return '';
//needs css:
//tr[data-properties~="outgoing"] .easypeasy_gesendet-column {
//  background: no-repeat center url("chrome://messenger/skin/icons/new/circle-sm.svg");
//}
//ein Icon aus dem Thunderbird Fundus, weitere Icons siehe:
//https://searchfox.org/comm-central/source/mail/themes/shared/mail/icons/new/compact
  });


})(this);