/*
esegue la get di <url> e richiama la funzione il cui nome è in <callbackName>
*/
function getUrl( url, callbackName ) {
    url += getLastSearchParam( url  );
    // esecuzione della richiesta
    req = getXmlHttp();
    if(req!=null) {
        req.onreadystatechange = eval( callbackName );
        //alert( url + ", " + callbackName );
        //req.onreadystatechange = callbackName;
        req.open( "get", url, true);
        req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
        req.send( null );
    }
    startLoading();
}

/*
funziona che ritorna se nella url è presente il parametro lastSearch=true
e lo propaga alla action
*/
var doneLastSearch = false;

function getLastSearchParam( url ) {
    if( !doneLastSearch )
    {
        doneLastSearch = true;
        var concatSymbol = "?";
        if( url.indexOf("?") >0 )
            concatSymbol = "&";


        if( (window.location + "").indexOf( "lastSearch=true" ) >= 0 )
        {
            //alert( "do last search" );
            return concatSymbol + "lastSearch=true";
        }
    }
    return "";
}

function remove(s, t) {
  /*
  **  Remove all occurrences of a token in a string
  **    s  string to be processed
  **    t  token to be removed
  **  returns new string
  */
  i = s.indexOf(t);
  r = "";
  if (i == -1) return s;
  r += s.substring(0,i) + remove(s.substring(i + t.length), t);
  return r;
  }

/*
funzione cross-browser per ottenere l'oggetto XmlHttpRequest
*/
function getXmlHttp() {
  req = null;
  if (window.XMLHttpRequest) {
    req = new XMLHttpRequest();
  } else if (window.ActiveXObject) {
    req = new ActiveXObject("Microsoft.XMLHTTP");
  }
  return req;
}

function Contains( obj )
{
   for ( i in this )
      if ( this[i] == obj )
         return true;
   return false;
}//Contains

/*
fa il trim di una stringa
*/
function trim(stringa) {
    reTrim = /\s+$|^\s+/g;
    return stringa.replace(reTrim,"");
}

/*
fa partire il loading
*/
function startLoading() {
    if(document.getElementById("loading")) document.getElementById("loading").style.display = "inline"
}

/*
ferma il loading
*/
function stopLoading() {
    if(document.getElementById("loading")) document.getElementById("loading").style.display = "none"
}

/*
controlla il risultato ed eventualmente visualizza il messaggio di chiave duplicata
*/
function checkPK() {
    if (req.readyState == 4) {
        if (req.status == 200) {
            //alert("checkPK");
            var resText = trim(req.responseText);
            if(resText != null) {
                var result = resText;
                if( result.length > 0 )
                {
                    document.getElementById("warningMessage").innerHTML=result;
                    document.getElementById("warningMessage").style.display= "block";
                    window.setTimeout('document.getElementById("warningMessage").style.display="none"',2000);
                }
            }
        }
        else {
            //todo: completare la visualizzazione dei messaggi di errore
            //createErrorMessage( req.responseText );
            //alert("stopping...");
            stopLoading();
            return false;
        }

        //alert("stopping...");
        stopLoading();
        return true;
    }
}

/************** QueryResult JS Object *******************************************************************************/
QueryResult = function( columns, data, currentPage, totItems, totPages, searchUrl, sortColumn, mode ) {
    this.columns        = columns;
    this.data           = data;
    this.currentPage    = currentPage;
    this.totItems       = totItems;
    this.totPages       = totPages;
    this.sortColumn     = sortColumn;
    this.mode           = mode;


    if( searchUrl.indexOf( "?" ) < 0 )
        searchUrl += "?";
    else
        searchUrl += "&";

    this.searchUrl      = searchUrl;
}

QueryResult.prototype.getSortColumn = function () {
    return this.sortColumn;
}

QueryResult.prototype.setMode = function (mode) {
    this.mode = mode;
}

QueryResult.prototype.getMode = function () {
    return this.mode;
}

QueryResult.prototype.getColumns = function () {
    return this.columns;
}

QueryResult.prototype.getData = function () {
    return this.data;
}

QueryResult.prototype.getCurrentPage = function () {
    return this.currentPage;
}

QueryResult.prototype.getTotItems = function () {
    return this.totItems;
}

QueryResult.prototype.getTotPages = function () {
    return this.totPages;
}

QueryResult.prototype.getSearchUrl = function () {
    return this.searchUrl;
}


QueryResult.prototype.getPaginazione = function () {
    var orderedSearchUrl = this.searchUrl;
    //alert(orderedSearchUrl.indexOf("lastSearch=true"));
    //orderedSearchUrl = remove(orderedSearchUrl, "lastSearch=true");

    if( this.getSortColumn() != null && this.getSortColumn() != "" )
    {
        orderedSearchUrl += "of=" + this.getSortColumn();

        if( this.getMode() == null )
            orderedSearchUrl += "&om=desc";
        else
            orderedSearchUrl += "&om="+this.getMode();
        orderedSearchUrl += "&";
        //alert(orderedSearchUrl);
    }

    var firstLink = orderedSearchUrl + "p=0";
    var prevLink = orderedSearchUrl + "p=" + (this.getCurrentPage() - 1);
    var nextLink = orderedSearchUrl + "p=" + (this.getCurrentPage() + 1);
    var lastLink = orderedSearchUrl + "p=" + (this.getTotPages() - 1);

    var result = "<div class='research_pages' style='padding: 0px;'>"+
        "<table width='100%' border='0' cellspacing='0' cellpadding='0' height='25'>"+
            "<tbody>"+
                "<tr>"+
                    "<td width='84%' style='padding-left: 10px;'>"+
                        "<div class='float_left'>" + this.getTotItems() + "&nbsp;Risultati</div>" +
                        "<div style='margin-left:15px;' align='center'>" +
                            (this.getCurrentPage() > 0 ? "<a href='javascript:getUrl(\"" + firstLink + "\", \"manageDoSearch\")'>&lt;&lt; prima</a>&nbsp;" : "" ) +
                            (this.getCurrentPage() > 0 ? "<a href='javascript:getUrl(\"" + prevLink + "\", \"manageDoSearch\")'>&lt; precedente</a>&nbsp;" : "" ) +
                            "&nbsp;Pagina&nbsp;" +
                            (this.getTotPages() > 0 ? this.getCurrentPage()+1 : 0) +
                            "&nbsp;di&nbsp;" +
                            this.getTotPages() +
                            (this.getCurrentPage() < this.getTotPages()-1 ? "&nbsp;<a href='javascript:getUrl(\"" + nextLink + "\", \"manageDoSearch\")'>successiva &gt;</a>" : "" ) +
                            (this.getCurrentPage() < this.getTotPages()-1 ? "&nbsp;<a href='javascript:getUrl(\"" + lastLink + "\", \"manageDoSearch\")'>ultima &gt;&gt;</a>" : "" ) +
                        "</div>" +
                    "</td>" +
                    "<td width='16%' style='padding-right: 10px;'>" +
                        "<div class='float_right'>Vai a:&nbsp;" +
                            "<select onchange='getUrl( \"" + orderedSearchUrl + "p=\" + this.options[ this.selectedIndex ].value , \"manageDoSearch\")'>";
                            for( var i=0; i < this.getTotPages(); i++ ) {
                                result += "<option value='" + i + "'" + ( i == this.getCurrentPage() ? "selected" : "" ) + " >&nbsp;" + (i+1) +"&nbsp;</option>";
                            }
                            result += "</select>" +
                            "</div>" +
                        "</td>" +
                    "</tr>" +
                "</tbody>" +
            "</table>" +
        "</div>" +
        "<div class='index_result_background' style='padding:0px;clear:both;margin-top: 0px; font-size: 11px;'>" +
            "<table id='result_search' width='100%' border='0' cellpadding='0' cellspacing='0'>" +
                "<tbody>"+
                    "<tr style='background:#F1EFE2;'>";
                    for ( var i = 0; i <this.getColumns().length; i++)
                        if (this.getColumns()[i].length == 2)
                            if (this.getColumns()[i][1] == this.getSortColumn())
                                if (this.getMode() == 'asc')
                                    result += "<td class='result_sortable_up' onclick='getUrl(\"" + this.searchUrl + "of=" + this.getColumns()[i][1] +  "&om=desc\", \"manageDoSearch\")'>" + this.getColumns()[i][0] + "</td>";
                                else
                                    result += "<td class='result_sortable_down' onclick='getUrl(\"" + this.searchUrl + "of=" + this.getColumns()[i][1] +  "&om=asc\", \"manageDoSearch\")'>" + this.getColumns()[i][0] + "</td>";
                            else
                                result += "<td class='result_sortable_default' onclick='getUrl(\"" + this.searchUrl + "of=" + this.getColumns()[i][1] +  "&om=asc\", \"manageDoSearch\")'>" + this.getColumns()[i][0] + "</td>";
                        else
                            result += " <td class='result_separator'>"+this.getColumns()[i][0]+"</td>";
                    result += "</tr>";

                    for ( var i = 0; i < this.data.length; i++) {
                        result += "<tr class='" + this.data[i][0] + "' onmouseover='this.className = this.className + \" hover\" ' onmouseout='this.className = this.className.replace(\"hover\", \"\")'>";
                        for (var j = 1; j <this.getColumns().length+1; j++) {
                            result += "<td>" + this.data[i][j] + "</td>";
                        }
                        result += "</tr>";
                    }
                    result += "</tbody>" +
            "</table>" +
        "</div>";
        result += "<div class='research_pages' style='padding: 0px;'>" +
        "<table width='100%' border='0' cellspacing='0' cellpadding='0' height='25'>" +
            "<tbody>" +
                "<tr>" +
                    "<td width='84%' style='padding-left: 10px;'>" +
                        "<div class='float_left'>" + this.getTotItems() + "&nbsp;Risultati</div>" +
                        "<div style='margin-left:15px;' align='center'>" +
                            (this.getCurrentPage() > 0 ? "<a href='javascript:getUrl(\"" + firstLink + "\", \"manageDoSearch\")'>&lt;&lt; prima</a>&nbsp;" : "" ) +
                            (this.getCurrentPage() > 0 ? "<a href='javascript:getUrl(\"" + prevLink + "\", \"manageDoSearch\")'>&lt; precedente</a>&nbsp;" : "" ) +
                            "&nbsp;Pagina&nbsp;" +
                            (this.getTotPages() > 0 ? this.getCurrentPage()+1 : 0) +
                            "&nbsp;di&nbsp;" +
                            this.getTotPages() +
                            (this.getCurrentPage() < this.getTotPages()-1 ? "&nbsp;<a href='javascript:getUrl(\"" + nextLink + "\", \"manageDoSearch\")'>successiva &gt;</a>" : "" ) +
                            (this.getCurrentPage() < this.getTotPages()-1 ? "&nbsp;<a href='javascript:getUrl(\"" + lastLink + "\", \"manageDoSearch\")'>ultima &gt;&gt;</a>" : "" ) +
                        "</div>" +
                    "</td>"+
                    "<td width='28%' style='padding-right: 10px;'>" +
                        "<div class='float_right'>Vai a:&nbsp;" +
                            "<select onchange='getUrl( \"" + orderedSearchUrl + "p=\" + this.options[ this.selectedIndex ].value , \"manageDoSearch\")'>";
                            for( var i=0; i < this.getTotPages(); i++ ) {
                                result += "<option value='" + i + "' " + ( i == this.getCurrentPage() ? "selected" : "" ) + " >&nbsp;" + (i+1) +"&nbsp;</option>";
                            }
                            result += "</select>" +
                        "</div>" +
                    "</td>" +
                "</tr>" +
            "</tbody>" +
        "</table>" +
    "</div>";
    return result;
}