// generates html for the list of values from a site
function generateSite(value)
{
    if (value != '')
    {
        var xhttp = new XMLHttpRequest();
        xhttp.onreadystatechange = function()
        {
           if (xhttp.readyState == 4 && xhttp.status == 200)
           {
                var parser = new DOMParser();
                var xmlDoc = parser.parseFromString(xhttp.responseText, "application/xml");
                var v = xmlDoc.getElementsByTagName("valoare");
                
                // remove all span childs
                var span_valori = document.getElementById("span_valori");
                while (span_valori.firstChild)
                    span_valori.removeChild(span_valori.firstChild);
                document.getElementById("_toate1").checked = false;
                
                // generate checkboxes
                for (i = 0; i < v.length; i++)
                { 
                    var a = v[i].getAttribute('numevaloare');
                    createOption(span_valori, i, a);
                }
            }
        };
        xhttp.open("GET", "sp_get_valori_list.php?site="+value, false);
        xhttp.send();
    }
}

// generates html for a drop down (select) option
function createOption(main_tag, indx, name)
{
    // create main span tag // <span id="span_valoare_1">
    var _span = document.createElement('span');
    _span.setAttribute("id", "span_valoare_" + indx);
    main_tag.appendChild(_span);
    
    // checkbox // <input id="_valoare_1" name="_valoare_1" class="element checkbox" type="checkbox" value="" />
    var _input = document.createElement('input');
    _input.setAttribute("id", "_valoare_" + indx);
    _input.setAttribute("name", "_valoare_" + name);
    _input.setAttribute("class", "element checkbox");
    _input.setAttribute("type", "checkbox");
    _span.appendChild(_input);
    
    // label // <label class="choice" for="_valoare_1">nume</label>
    var _label = document.createElement('label');
    _label.setAttribute("class", "choice");
    _label.setAttribute("for", "_valoare_" + indx);
    _label.appendChild(document.createTextNode(name));
    _span.appendChild(_label);
}

// selects all valori checkboxes
function selectAllCheckboxes(value)
{
    for (i = 0; i < 1000; i++)
    { 
      var v = document.getElementById("_valoare_" + i);
      if (v != null)
          v.checked = value;
    }
}

// verifies how manu checkboxes are checked 
function verifyAllCheckboxes()
{
    var k = 0;
    
    for (i = 0; i < 1000; i++)
    { 
      var v = document.getElementById("_valoare_" + i);
      if (v != null)
          if (v.checked)
              k++;
    }
    
    return k;
}

// pads a string with '0' (for day/month values)
function zeroPad(valoare)
{
    if (valoare.length == 1)
        return '0' + valoare;

    return valoare;
}

// validates the report form
function checkReportsForm()
{
    // data inceput
    var an1 = document.getElementById("_data_inceput_3").value;
    var luna1 = zeroPad(document.getElementById("_data_inceput_1").value);
    var zi1 = zeroPad(document.getElementById("_data_inceput_2").value);
    var ora1 = zeroPad(document.getElementById("_ora_inceput_1").value);
    var minut1 = zeroPad(document.getElementById("_ora_inceput_2").value);
    var secunda1 = zeroPad(document.getElementById("_ora_inceput_3").value);
    //var ampm1 = document.getElementById("_ora_inceput_4").value;
    var data_inceput = Date.parse(an1 + '-' + luna1 + '-' + zi1 + ' ' + ora1 + ':' + minut1 + ':' + secunda1/* + ' ' + ampm1*/);
    if (isNaN(data_inceput))
    {
        alert('Completati data inceput.');
        return false;
    }
    
    // data sfarsit
    var an2 = document.getElementById("_data_sfarsit_3").value;
    var luna2 = document.getElementById("_data_sfarsit_1").value;
    var zi2 = document.getElementById("_data_sfarsit_2").value;
    var ora2 = document.getElementById("_ora_sfarsit_1").value;
    var minut2 = document.getElementById("_ora_sfarsit_2").value;
    var secunda2 = document.getElementById("_ora_sfarsit_3").value;
    //var ampm2 = document.getElementById("_ora_sfarsit_4").value;
    var data_sfarsit = Date.parse(an2 + '-' + luna2 + '-' + zi2 + ' ' + ora2 + ':' + minut2 + ':' + secunda2/* + ' ' + ampm2*/);
    if (isNaN(data_sfarsit))
    {
        alert('Completati data sfarsit.');
        return false;
    }
    
    // data inceput < data sfarsit
    if (data_inceput > data_sfarsit)
    {
        alert('Data inceput este mai mare decat data sfarsit.');
        return false;
    }
    
    // data sfarsit < data azi (daca e public display)
        var startOfDay = new Date();
    startOfDay.setHours(0, 0, 0, 0);
    if (data_sfarsit >= startOfDay)
    {
        alert('Data de sfârșit trebuie să fie anterioară datei de astăzi');
        return false;
    }
        
    // site, sa fie ales
    if (document.getElementById("_nume_site").selectedIndex == 0)
    {
        alert('Alegeti un site intai.');
        return false;
    }
    
    // stare, sa fie aleasa
        
    // valori, cel putin una
    if (verifyAllCheckboxes() == 0)
    {
        alert('Alegeti cel putin o valoare din acest site.');
        return false;
    }
    
    return true;
}


// validates the grafic form
function checkGraficForm()
{
    // data inceput
    var an1 = document.getElementById("_data_inceput_3").value;
    var luna1 = zeroPad(document.getElementById("_data_inceput_1").value);
    var zi1 = zeroPad(document.getElementById("_data_inceput_2").value);
    var ora1 = zeroPad(document.getElementById("_ora_inceput_1").value);
    var minut1 = zeroPad(document.getElementById("_ora_inceput_2").value);
    var secunda1 = zeroPad(document.getElementById("_ora_inceput_3").value);
    //var ampm1 = document.getElementById("_ora_inceput_4").value;
    var data_inceput = Date.parse(an1 + '-' + luna1 + '-' + zi1 + ' ' + ora1 + ':' + minut1 + ':' + secunda1/* + ' ' + ampm1*/);
    if (isNaN(data_inceput))
    {
        alert('Completati data inceput.');
        return false;
    }
    
    // data sfarsit
    var an2 = document.getElementById("_data_sfarsit_3").value;
    var luna2 = document.getElementById("_data_sfarsit_1").value;
    var zi2 = document.getElementById("_data_sfarsit_2").value;
    var ora2 = document.getElementById("_ora_sfarsit_1").value;
    var minut2 = document.getElementById("_ora_sfarsit_2").value;
    var secunda2 = document.getElementById("_ora_sfarsit_3").value;
    //var ampm2 = document.getElementById("_ora_sfarsit_4").value;
    var data_sfarsit = Date.parse(an2 + '-' + luna2 + '-' + zi2 + ' ' + ora2 + ':' + minut2 + ':' + secunda2/* + ' ' + ampm2*/);
    if (isNaN(data_sfarsit))
    {
        alert('Completati data sfarsit.');
        return false;
    }
    
    // data inceput < data sfarsit
    if (data_inceput > data_sfarsit)
    {
        alert('Data inceput este mai mare decat data sfarsit.');
        return false;
    }
    
        var startOfDay = new Date();
    startOfDay.setHours(0, 0, 0, 0);
    if (data_sfarsit >= startOfDay)
    {
        alert('Data de sfârșit trebuie să fie anterioară datei de astăzi');
        return false;
    }
        
    return true;
}

// sets a value in the drop down (select) control
function setSelectedValue(selectObj, valueToSet)
{
    for (var i = 0; i < selectObj.options.length; i++)
    {
      if (selectObj.options[i].text == valueToSet)
      {
          selectObj.options[i].selected = true;
          generateSite(valueToSet)
          return;
      }
    }
}