//Computes the weight of the current selection and sets error message if capacity is exceeded
function computeWeight(){
  //  var current_decision_table = document.getElementById("current_decision_table");
    var table = document.getElementById("decision_table");
    var rows = table.rows;
    
    var totalWeight = 0;
    var totalValue = 0;
    
    for(var i = 2; i < (rows.length - 3); i++){
        var part_id = parseInt(rows[i].getElementsByTagName("TD")[5].innerHTML); //We get the real part id from a hidden column at the end of the table
        var c_weight = parseFloat(rows[i].getElementsByTagName("TD")[1].innerHTML);
        console.log(part_id + ' ' +c_weight);
        var c_value = parseFloat(rows[i].getElementsByTagName("TD")[2].innerHTML);
     //   console.log(c_value);
        var selected = document.getElementById('part_' + (part_id)).checked;
        totalWeight += (c_weight*selected);  
        totalValue += (c_value*selected);
    }
    $('#total_weight').html(totalWeight);
    $('#total_value').html(totalValue);

    console.log(totalWeight);
   
    if(document.title != "Task Description" && document.title != "Feedback" ){
        try {
            if(totalWeight>capacity){
                $('#message').html('<div class="alert alert-danger" role="alert"> Das Gesamtgewicht Ihrer Auswahl ist <b>' + (totalWeight-capacity) + ' Einheiten</b> zu hoch! Bitte ändern Sie Ihre Auswahl um fortzufahren! </div>');
                document.getElementById("Next_Button").disabled = true;
            }else{
                $('#message').html('<br><br>');
                document.getElementById("Next_Button").disabled = false;
            }
        }
        catch(error) {
            console.error(error);
            // expected output: ReferenceError: nonExistentFunction is not defined
            // Note - error messages will vary depending on browser
        }
    }
}

function save_selection_clicks(current_selection){

    var complete_click_history = document.getElementById("id_click_history").value;

    var table = document.getElementById("decision_table");
    var rows = table.rows;

    var sorted_selection = [];
    var part_id_clicked = 0;
    var checked_unchecked = 'na';
    for(var i = 2; i < (rows.length - 3); i++){
        var part_id = parseInt(rows[i].getElementsByTagName("TD")[5].innerHTML); //We get the real part id from a hidden column at the end of the table
        var selected = document.getElementById('part_' + (part_id)).checked;
        sorted_selection[part_id-1] = selected;
        if(sorted_selection[part_id-1] != current_selection[part_id-1]){
            part_id_clicked = part_id;
            if(sorted_selection[part_id-1] == true){
                checked_unchecked = 'c';
            }else{
                checked_unchecked = 'u';
            }
        }
    }

    for(var i = 0; i < sorted_selection.length; i++){
        current_selection[i] = sorted_selection[i];
    }

    complete_click_history  += part_id_clicked + checked_unchecked + '_';

    document.getElementById("id_click_history").value = complete_click_history;

    console.log('Complete Activity Log: ' + document.getElementById("id_click_history").value);

}