//exports.render_event_presentation_records = async function (events) {
async function render_event_presentation_records(events) {
  console.log('****************** Presentations ******************');
  console.log('Rendering event presentation records...');
  
  if (looping_tbl_event_presentation) {
    console.log('Already looping through the tbl_event_presentation table. Not starting until finished.');
    return false;
  } else {
    
  }
  
  
  let launcher_sessions = document.getElementById('launcher_sessions').childNodes; //_list_items
  //console.log(launcher_sessions);
  
  for (let i=0, len=launcher_sessions.length; i < len; i++) {
  //for (let i in launcher_sessions) {
    console.log('Current launcher session_id='+launcher_sessions[i].getAttribute('data-session_id'));
    let session_id = launcher_sessions[i].getAttribute('data-session_id');
    
    let presentations_list = launcher_sessions[i].getElementsByClassName('session_presentations')[0].getElementsByTagName('ul')[0].childNodes;
    //console.log(presentations_list);
    
    // First: update or delete presentations
    if (presentations_list.length) {
      console.log('Presentations listed under this session (id='+session_id+'). (launcher sessions loop i = '+i+')');
      //console.log(launcher_sessions[i].getElementsByClassName('session_presentations')[0].getElementsByTagName('ul'));
      
      for (let j=0, len=presentations_list.length; j < len; j++) {
        console.log('Current launcher presentation_id='+presentations_list[j].getAttribute('data-presentation_id'));
        let presentation_id = presentations_list[j].getAttribute('data-presentation_id');
        
        let tbl_event_presentation_result = await tbl_event_presentation.iterate(function(value, key, iteration) {
          //console.log('*** 1: session_id='+session_id+' | presentation.event_session_id='+value.event_session_id+' | presentation_id='+presentation_id+' | presentation.id='+value.id+' (launcher sessions loop i='+i+')');
          looping_tbl_event_presentation = true;
          if (session_id == value.event_session_id && presentation_id == value.id) {
            // Found presentation in that session. Updating...
            console.log('Presentation ('+presentation_id+') was found in the session ('+session_id+'). Updating...');
            document.getElementById('event_presentation_'+value.id).getElementsByTagName('div')[0].getElementsByTagName('strong')[0].innerHTML = value.name;
            let presentation_startdatetime = new Date(value.start_datetime);
            
            let presentation_startdatetime_string = dateFns.format(presentation_startdatetime, 'h:mm A')
            
            document.getElementById('event_presentation_'+value.id).getElementsByTagName('div')[0].getElementsByTagName('span')[0].innerHTML = presentation_startdatetime_string;
            
          } else if (session_id != value.event_session_id && presentation_id == value.id) {
            // Found presentation in a session that it should not be in. Removing...
            console.log('Presentation exists but should not be part of this session. Removing...');
            console.log('*** Presentation id ('+value.id+') is NOT part of this session ('+session_id+'). (launcher sessions loop i='+i+')');
            document.getElementById('event_presentation_'+presentation_id).remove(); // Remove the node from the launcher presentations list
            
          } else {
            //console.log('Not doing anything');
          }
          
        }).then(function() {
          console.log('idb_to_ui: Iterate tbl_event_presentation looking for presentations to update or remove is complete');
          
          looping_tbl_event_presentation = false;
        });
      }
      
      
    } else { // Close for if presentations_list.length
      
    } // Close for if presentations_list.length
    
    
    // Now that the updates and removals have been done we need to add presentations.
    let tbl_event_presentation_result = await tbl_event_presentation.iterate(function(value, key, iteration) {
      //console.log('*** 2: session_id='+session_id+' | presentation.event_session_id='+value.event_session_id+' | presentation.id='+value.id+' (launcher sessions loop i='+i+')');
      looping_tbl_event_presentation = true;
      
      let add_presentation = true;
      
      if (session_id == value.event_session_id) {
        // This presentation should be part of the session. Adding if not there...
        
        presentations_list = launcher_sessions[i].getElementsByClassName('session_presentations')[0].getElementsByTagName('ul')[0].childNodes;
        //console.log(presentations_list);
        
        if (presentations_list.length) {
          // One more presentations are already in this session.
          // Need to check if this one needs to be added.
          for (let j=0, len=presentations_list.length; j < len; j++) {
            let presentation_id = presentations_list[j].getAttribute('data-presentation_id');
            if (presentation_id == value.id) {
              // Nothing here so it for sure needs to be added.
              add_presentation = false;
            } else {
              // Don't reset the add_presentation back to true
            }
          }
        } else {
          // Nothing here, so it for sure needs to be added.
          //add_presentation = true;
        }
      } else {
        add_presentation = false;
      }
      
      
      if (add_presentation) {
        // Presentation not found. Adding...
        console.log('Presentation was not found in the session but should be. Adding...');
        console.log('Presentation id ('+value.id+') is part of this session ('+session_id+'). (launcher sessions loop i='+i+')');
        
        // Add the new presentation to the launcher presentation list
        let presentation_li_node = document.createElement('LI');
        presentation_li_node.id = 'event_presentation_'+value.id;
        presentation_li_node.className = 'list-group-item event_presentation';
        presentation_li_node.setAttribute('data-session_id', value.event_session_id);
        presentation_li_node.setAttribute('data-presentation_id', value.id);
        
        presentation_li_node.title = 'id='+value.id+' session_id='+value.event_session_id+' presentation_id='+value.id;
        
        let presentation_li_heading_div_node = document.createElement('DIV');
        presentation_li_heading_div_node.className = 'list-group-item-heading d-flex justify-content-between align-items-center';
        
          let presentation_name_strong_node = document.createElement('STRONG');
          
          let presentation_name_text_node= document.createTextNode(value.name);
          presentation_name_strong_node.appendChild(presentation_name_text_node);
          
          let presentation_heading_span_node = document.createElement('SPAN');
          
          if (display_presentation_badges) {
            presentation_heading_span_node.className = 'badge badge-pill badge-info d-inline';
          } else {
            presentation_heading_span_node.className = 'badge badge-pill badge-info d-none';
          }
          
          /*
          // Create the session code span
          let span_session_code_node = document.createElement('SPAN');
          span_session_code_node.id = 'detail_session_code_'+value.id;
          if ( display_session_codes && value.code && value.code.length) {
            span_session_code_node.className = 'd-inline detail_session_code';
          } else {
            span_session_code_node.className = 'd-none detail_session_code';
          }
          
          let span_session_code_text_node = document.createTextNode('('+value.code+')');
          span_session_code_node.appendChild(span_session_code_text_node);
          */
          
          //let presenation_font = '<span class="fas fa-hourglass-start"></span> ';
          
          let presentation_startdatetime = new Date(value.start_datetime);
          let presentation_startdatetime_string = dateFns.format(presentation_startdatetime, 'h:mm A');
          let presentation_heading_span_text_node = document.createTextNode(presentation_startdatetime_string);
          presentation_heading_span_node.appendChild(presentation_heading_span_text_node);
        
        presentation_li_heading_div_node.appendChild(presentation_name_strong_node);
        presentation_li_heading_div_node.appendChild(presentation_heading_span_node);
        
        
        let presentation_li_text_div_node = document.createElement('DIV');
        //presentation_li_text_div_node.id = 'event_presentation_files_'+value.id;
        presentation_li_text_div_node.className = 'list-group-item-text';
        
        let presentation_files_ul_group_node = document.createElement('UL');
        presentation_files_ul_group_node.id = 'presentation_files_list_'+value.id;
        presentation_files_ul_group_node.className = 'list-group list-group-flush presentation_files presentation_files_list event_files_list';
        
        let presentation_presenters_ul_group_node = document.createElement('UL');
        presentation_presenters_ul_group_node.id = 'event_presentation_presenters_'+value.id;
        presentation_presenters_ul_group_node.className = 'list-group list-group-flush presentation_presenters presentation_presenters_list';
        presentation_presenters_ul_group_node.setAttribute('data-session_id', value.event_session_id);
        presentation_presenters_ul_group_node.setAttribute('data-presentation_id', value.id);
        
        presentation_li_text_div_node.appendChild(presentation_files_ul_group_node);
        presentation_li_text_div_node.appendChild(presentation_presenters_ul_group_node);
        
        
        presentation_li_node.appendChild(presentation_li_heading_div_node);
        presentation_li_node.appendChild(presentation_li_text_div_node);
        
        
        //console.log(launcher_sessions[i].getElementsByClassName('session_presentations'));
        let launcher_session_details = document.getElementById('detail_session_'+session_id);
        //console.log(launcher_session_details.getElementsByClassName('session_presentations'));
        
        // Trying to remove old ID in case there is one already rendered
        try {
          document.getElementById('event_presentation_'+value.id).remove();
        } catch(err) {
          console.log('A node with the ID of event_presentation_'+value.id+' was not found. In most cases this is expected.');
          console.log(err.message);
        }
        
        let session = document.getElementById('detail_session_'+session_id).getElementsByClassName('session_presentations')[0].getElementsByTagName('ul')[0].appendChild(presentation_li_node);
        presentation_id_found = true;
      } else {
        // Presentation not part of this session. Moving on...
        //console.log('Presentation was not found in the session and should not be. Moving on...');
        //console.log('*** Presentation id ('+value.id+') is not part of this session ('+session_id+'). (launcher sessions loop i='+i+')');
      }
      
    }).then(function() {
      console.log('idb_to_ui: Iterate tbl_event_presentation looking for presentations to add is complete');
      looping_tbl_event_presentation = false;
      return true;
    })
    .catch(function (error) {
      console.log('Something went wrong in function render_event_presentation_records.');
      console.log(error);
      return false;
    });
    
  }
  
  return result;
}