/*    Global variables    */
//    IP Address of the Inverter
$dataManagerIP = "192.168.1.5";


//    Latitude and Longitude of where the solar panels are installed. Serve per trovare alba e tramonto, così di notte non funziona
$latitude  = 45.748021;
$longitude = 9.845357;


//    Path of the script - to ensure we're reading and writing the correct directory
$currentPath = dirname(__FILE__) . DIRECTORY_SEPARATOR;


//    Today's date - used for writing .csv and .png files.
$today = date('Y-m-d', time());
//    Path of the script - to ensure we're reading and writing the correct directory
$currentPath = dirname(__FILE__) . DIRECTORY_SEPARATOR;


//    Calculate the timezone offset
$this_timezone = new DateTimeZone(date_default_timezone_get());
$now = new DateTime("now", $this_timezone);
$offset = $this_timezone->getOffset($now);
//    Sunrise and Sunset times.
$sunriseTimestamp = date_sunrise(time(), SUNFUNCS_RET_TIMESTAMP, 
                                 $latitude, $longitude, 
                                 ini_get("date.sunrise_zenith"), $offset);
$sunsetTimestamp = date_sunset(time(), SUNFUNCS_RET_TIMESTAMP, 
                               $latitude, $longitude, 
                               ini_get("date.sunset_zenith"), $offset);


//    Are we between sunrise and set?
//    If so, start reading from the solar panels
if (time() >= $sunriseTimestamp && time() <= $sunsetTimestamp)
{
    //    API call for Fronius
    //    Documentation:
    //    https://www.fronius.com/cps/rde/xbcr/SID-539A9068-7638796D/fronius_international/42_0410_2012_318486_snapshot.pdf


    $apiURL = "http://".$dataManagerIP."/solar_api/v1/GetInverterRealtimeData.cgi?Scope=Device&DeviceID=1&DataCollection=CommonInverterData";


    //    Get the raw JSON
    $jsonData = file_get_contents($apiURL);


    //    Decode into an object
    $solar = json_decode($jsonData, true);


    //    Is the inverter up and running?
    if (7 == $solar["Body"]["Data"]["DeviceStatus"]["StatusCode"])
    {
        //    Get the variables in which we're interested
        $solarTimestamp   = $solar["Head"]["Timestamp"];                  //    Time according to the DataManager
        $solarPower       = $solar["Body"]["Data"]["PAC"]["Value"];       //    Real time AC being fed into the mains
        $solarACCurrent   = $solar["Body"]["Data"]["IAC"]["Value"];       //    Real time Ampere AC current
        $solarACVoltage   = $solar["Body"]["Data"]["UAC"]["Value"];       //    Real time Volt AC voltage
        $solarACFrequency = $solar["Body"]["Data"]["FAC"]["Value"];       //    Real time Hz AC frequency
        $solarDCCurrent   = $solar["Body"]["Data"]["IDC"]["Value"];       //    Real time Ampere AD current
        $solarDCVoltage   = $solar["Body"]["Data"]["UDC"]["Value"];       //    Real time Volt AD voltage
        $solarDayEnergy   = $solar["Body"]["Data"]["DAY_ENERGY"]["Value"];//    Total amount generated today


        //    Format for writing to CSV file - Da rivedere per 123solar
        //    Time,Energy,Total
        $solarArray = array($solarTimestamp, $solarPower, $solarACCurrent, $solarACVoltage, $solarACFrequency, $solarDCCurrent, $solarDCVoltage, $solarDayEnergy);
        //    Append the data to a CSV file named YYYY-MM-DD.csv
        $solarCSV = fopen($currentPath . $today . ".csv", 'a');
        fputcsv($solarCSV, $solarArray);
        fclose($solarCSV);




    }    
}

 
if (!defined('checkaccess')) {
    die('Direct access not permitted');
}
// For Fronius https://github.com/victronenergy/dbus-fronius
$CMD_RETURN = ''; // Always initialize

function is_json($string, $return_data = false)
{
    $data = json_decode($string);
    return (json_last_error() == JSON_ERROR_NONE) ? ($return_data ? $data : TRUE) : FALSE;
}

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'http://localhost/solar_api/v1/GetInverterRealtimeData.cgi?Scope=Device&DeviceID=1&DataCollection=CommonInverterData');
curl_setopt($ch, CURLOPT_TIMEOUT, 5);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$CMD_RETURN = strip_tags(curl_exec($ch));
curl_close($ch);

$dataarray = is_json($CMD_RETURN, TRUE);
if ($dataarray) {
    //print_r($dataarray);
    
    // Grid values
    $G1V = $dataarray->Body->Data->UAC->Value;
    settype($G1V, 'float');
    $G1A = $dataarray->Body->Data->IAC->Value;
    settype($G1A, 'float');
    $G1P = $dataarray->Body->Data->PAC->Value;
    settype($G1P, 'float');
    $G2V = null;
    $G2A = null;
    $G2P = null;
    $G3V = null;
    $G3A = null;
    $G3P = null;
    $FRQ = $dataarray->Body->Data->FAC->Value;
    settype($FRQ, 'float');
    
    // Strings
    $I1V = $dataarray->Body->Data->UDC->Value;
    settype($I1V, 'float');
    $I1A = $dataarray->Body->Data->IDC->Value;
    settype($I1A, 'float');
    $I1P = round($I1V * $I1A, 2);
    settype($I1P, 'float');
    $I3V = null;
    $I3A = null;
    $I3P = null;
    $I4V = null;
    $I4A = null;
    $I4P = null;
    
    
    // Inverter
    $EFF = round(($G1P / $I1P) * 100, 2);
    $INVT = null;
    $BOOT = null;
    $KWHT = $dataarray->Body->Data->TOTAL_ENERGY->Value;
    $KWHT /= 1000;
    settype($KWHT, 'float');
    
    $RET = 'OK';
} else {
    $RET = 'NOK';
}
?>