<?php
class Ansteuerung_Askoheat extends IPSModule
{
    private $timerID;

    public function Create()
    {
        parent::Create();

        // Verbraucherspezifische Properties
        $this->RegisterPropertyInteger("ZeitKonstante", 120);
        $this->RegisterPropertyBoolean("Boilertemperatur_glätten", false);
        $this->RegisterPropertyInteger("Boilervolumen", 300);
        $this->RegisterPropertyString("Zeitplan", "");
        $this->RegisterPropertyInteger("BoilerLeistung", 4400); // Standardwert für Volllast
        $this->RegisterPropertyInteger("Interval", 5); // Recheninterval
        $this->RegisterPropertyInteger("Variable_Leistung", 0); // Recheninterval
        $this->RegisterPropertyInteger("Variable_Temperatur_Ist", 0); // Recheninterval

        // Variabeln für Kommunkation mit Manager
        $this->RegisterVariableInteger("Sperre_Prio", "Sperre_Prio");
        $this->RegisterVariableInteger("PV_Prio", "PV_Prio");
        $this->RegisterVariableBoolean("Idle", "Idle", "", 0);
        $this->RegisterVariableInteger("Aktuelle_Leistung", "Aktuelle_Leistung", "", 0);
        $this->RegisterVariableFloat("Bezogene_Energie", "Bezogene_Energie", "", 0);
        $this->RegisterVariableString("PowerSteps", "PowerSteps");
        $this->RegisterVariableInteger("Power", "Power");
        $this->RegisterVariableBoolean("Is_Peak_Shaving", "Is_Peak_Shaving");
        $this->RegisterVariableInteger("Leistung_Delta", "Leistung_Delta", "", 0);
        $this->RegisterVariableFloat("Boilertemperatur", "Boilertemperatur", "", 0); 

        // Boiler spezifische Variablen
        $this->RegisterVariableInteger("Mindesttemperatur","Mindesttemperatur","",45);
        $this->RegisterVariableInteger("Maximaltemperatur","Maximaltemperatur","",60);
        $this->RegisterVariableInteger("Legionellentemperatur","Legionellentemperatur","",65);
        $this->RegisterVariableInteger("LegioCounter", "LegioCounter", "", 0);
        $this->RegisterVariableInteger("Boilertemperatur", "Boilertemperatur", "", 0);

        // Hilfsvariabeln für Idle zustand
        $this->RegisterPropertyInteger("IdleCounterMax", 2);
        $this->RegisterVariableInteger("IdleCounter", "IdleCounter", "", 0);
        $this->SetValue("IdleCounter", 0);

        // Initialisiere Idle
        $this->SetValue("Idle", true);

        $this->RegisterTimer("Timer_Do_UserCalc_Verb",$this->ReadPropertyInteger("Interval")*1000,"IPS_RequestAction(" .$this->InstanceID .', "Do_UserCalc", "");');

    }

    public function ApplyChanges()
    {
        parent::ApplyChanges();
        $this->SetTimerInterval("Timer_Do_UserCalc_Verb",$this->ReadPropertyInteger("Interval")*1000); 

    }

    public function RequestAction($Ident, $Value)
    {
        switch ($Ident) {
           
            case "SetAktuelle_Leistung":
                $this->SetValue("Power", (int)$Value);
                break;
    
            case "GetCurrentData":
                $this->SetValue("Is_Peak_Shaving", (bool)$Value);
                break;

            case "Do_UserCalc":
                $this->SetAktuelle_Leistung($this->GetValue("Power"));
                $this->GetCurrentData($this->GetValue("Is_Peak_Shaving"));
                break; 

            default:
                throw new Exception("Invalid Ident");
        }
    }


    public function getNextTimeAndTemperature($zeitplan) {
        $arr = json_decode($zeitplan, true);
        if (empty($arr)) {
            return null;
        }
        $currentTime = new DateTime();
        $nextEntry = null;
        $minDiff = PHP_INT_MAX;
    
        foreach ($arr as $entry) {
            $entryTime = DateTime::createFromFormat('H:i', $entry['Uhrzeit']);
            if ($entryTime < $currentTime) {
                $entryTime->modify('+1 day');
            }
            $diff = $currentTime->diff($entryTime)->format('%r%a') * 24 * 60 + $currentTime->diff($entryTime)->format('%r%h') * 60 + $currentTime->diff($entryTime)->format('%r%i');
            if ($diff < $minDiff) {
                $minDiff = $diff;
                $nextEntry = $entry;
            }
        }
    
        return $nextEntry;
    }

    public function calculateRemainingTime($nextTime) {
        $currentTime = new DateTime();
        $nextDateTime = DateTime::createFromFormat('H:i', $nextTime);
        if ($nextDateTime < $currentTime) {
            $nextDateTime->modify('+1 day');
        }
        $interval = $currentTime->diff($nextDateTime);
        return $interval->h + ($interval->i / 60);
    }
    
    public function calculateRequiredHeat($boilervolumen, $tempDiff) {
        // Annahme: spezifische Wärmekapazität von Wasser = 4.186 J/g°C
        // 1 Liter Wasser = 1000 Gramm
        $specificHeatCapacity = 4.186; // J/g°C
        $waterMass = $boilervolumen * 1000; // Gramm
        return $specificHeatCapacity * $waterMass * $tempDiff; // Joules
    }
    
    public function canBoilerReachTemperature($boilervolumen, $boilerTemper, $nextTemp, $remainingTime, $vollleistung) {
        $tempDiff = $nextTemp - $boilerTemper;
        $requiredHeat = $this->calculateRequiredHeat($boilervolumen, $tempDiff);
        $availableHeat = $vollleistung * $remainingTime * 3600; // Leistung in Watt * Zeit in Sekunden
        return $availableHeat >= $requiredHeat;
    }

    // Methode zum Setzen des aktuellen Stromverbrauchs
    public function SetAktuelle_Leistung(int $power)
    {
        if($power>0){   

            RequestAction($this->ReadPropertyInteger("Variable_Leistung"), $this->ReadPropertyInteger("BoilerLeistung")/$power);

        }else{

           RequestAction($this->ReadPropertyInteger("Variable_Leistung"), 0);
    
        }
        
        // Prüfe auf Änderung der Power im Vergleich zur letzten Einstellung
        $lastPower = GetValue($this->GetIDForIdent("Aktuelle_Leistung"));
        if ($power != $lastPower) {
            $this->SetValue("Idle", false);
            $this->SetValue(
                "IdleCounter",
                $this->ReadPropertyInteger("IdleCounterMax")
            );
        }

        // Setze die neue Aktuelle_Leistung
        $this->SetValue("Aktuelle_Leistung", $power);
        $this->SetValue("Bezogene_Energie", ($this->GetValue("Bezogene_Energie") + ($this->GetValue("Aktuelle_Leistung")*($this->ReadPropertyInteger("Interval")/3600))));
        // IdleCounter verarbeiten
        $this->ProcessIdleCounter();
    }

    
    public function Calc_Seven_Steps(int $power)
    {
         $steps = [];
         $increment = $power / 7;
         
         for ($i = 0; $i <= 7; $i++) {
             $steps[] = $i * $increment;
         }
         
         return $steps;
    }
    
    // Methode zum Abrufen der aktuellen Daten
    public function GetCurrentData(bool $Peak)
    {
        $LegioCounter = $this->GetValue("LegioCounter");

       
        $boilertemperatur_glätten = $this->ReadPropertyBoolean("Boilertemperatur_glätten");

        if ($boilertemperatur_glätten) {
            // Wenn Glättung aktiviert ist, führe das Glätten durch
            $boilerFuehlerPT1ID = $this->ReadPropertyInteger("Variable_Temperatur_Ist");
        
            if (IPS_VariableExists($boilerFuehlerPT1ID)) {
                $boilerPT1 = GetValue($boilerFuehlerPT1ID);
            } else {
                $boilerPT1 = 0.0; // Standardwert
            }
        
            $boilerTempID = $this->GetIDForIdent("Boilertemperatur");
            if (IPS_VariableExists($boilerTempID)) {
                $boilerTemp = $this->GetValue("Boilertemperatur");
            } else {
                $boilerTemp = 0.0; // Standardwert
            }
        
            // PT
            $time_constant= $this->ReadPropertyInteger("ZeitKonstante");
            $delta_t = 5; // Zeitdifferenz zwischen den Messungen (30 Sekunden)
            $alpha = $delta_t / ($time_constant + $delta_t);
            $newBoilerTemp = $boilerTemp + $alpha * ($boilerPT1 - $boilerTemp);
            $this->SetValue("Boilertemperatur", $newBoilerTemp);
        } else {
            // Wenn Glättung nicht aktiviert ist, setze die Boilertemperatur direkt auf den Wert des Boilerfühlers
            $boilerFuehlerPT1ID = $this->ReadPropertyInteger("Variable_Temperatur_Ist");
        
            if (IPS_VariableExists($boilerFuehlerPT1ID)) {
                $boilerPT1 = GetValue($boilerFuehlerPT1ID);
            } else {
                $boilerPT1 = 0.0; // Standardwert
            }
        
            // Setze Boilertemperatur direkt auf den Wert des Boilerfühlers
            $this->SetValue("Boilertemperatur", $boilerPT1);
        }
        

        $boilerTemp = $this->GetValue("Boilertemperatur");
        $minTemp = $this->GetValue("Mindesttemperatur");
        $maxTemp = $this->GetValue("Maximaltemperatur");
        $LegioTemp = $this->GetValue("Legionellentemperatur");
        $vollLeistung = $this->ReadPropertyInteger("BoilerLeistung");


        $nextEntry = $this->getNextTimeAndTemperature($this->ReadPropertyString("Zeitplan"));
        if ($nextEntry !== null) {
            $remainingTime = $this->calculateRemainingTime($nextEntry['Uhrzeit']);
            $nextTemp = $nextEntry['Solltemperatur'];

        if (!$this->canBoilerReachTemperature($this->ReadPropertyInteger("Boilervolumen"), $boilerTemp, $nextTemp, $remainingTime, $vollLeistung)) {
            $minTemp = $nextTemp;
        }
    }


    $boilerIsOn = (GetValue($this->ReadPropertyInteger("Variable_Leistung"))>0);
    $AktuelleVollast = GetValue(
            $this->ReadPropertyInteger("Variable_Leistung")
        );


        if ($boilerTemp > $LegioTemp) {
            $LegioCounter = 0;
        } else {
            $LegioCounter = $LegioCounter + 1;
        }
        if ($LegioCounter > 69120) {
            $maxTemp = $LegioTemp;
        }
        if ($LegioCounter > 120960 && $this->ist_nachts()) {
            $minTemp = $LegioTemp;
        }
        if ($LegioCounter > 138240) { // Timeout für Legio wenn temperatur nicht erreicht werden kann, setze legionellenfunktion zurück
            $LegioCounter = 0;
        }

        $this->SetValue("LegioCounter", $LegioCounter);

        if ($Peak) {
            if ($boilerTemp < $minTemp) {
                $this->SetValue( "PowerSteps", json_encode($this->Calc_Seven_Steps($vollLeistung)) );
            } elseif (
                $boilerTemp < $minTemp + 5 &&
                ($boilerIsOn)
            ) {
                $this->SetValue(
                    "PowerSteps",
                    json_encode($this->Calc_Seven_Steps($vollLeistung))
                );
            } else {
                $this->SetValue("PowerSteps", json_encode([0]));
            }
        } else {
            if ($boilerTemp < $minTemp) {
                $this->SetValue("PowerSteps", json_encode([$vollLeistung]));
            } elseif (
                $boilerTemp < $minTemp + 5 &&
                ($boilerIsOn)
            ) {
                $this->SetValue("PowerSteps", json_encode([$vollLeistung]));
            } elseif ($boilerTemp < $maxTemp - 5) {
                $this->SetValue("PowerSteps", json_encode($this->Calc_Seven_Steps($vollLeistung)));
            } elseif ( $boilerTemp < $maxTemp && ($boilerIsOn)
            ) {
                $this->SetValue( "PowerSteps", json_encode($this->Calc_Seven_Steps($vollLeistung)));
            } else {
                $this->SetValue("PowerSteps", json_encode([0]));
            }
        }
    }

    private function ProcessIdleCounter()
    {
        // IdleCounter auslesen und verarbeiten
        $idleCounter = $this->GetValue("IdleCounter");
        if ($idleCounter > 0) {
            $this->SetValue("Idle", false);
            $this->SetValue("IdleCounter", $idleCounter - 1);
        } else {
            $this->SetValue("Idle", true);
        }
    }

    private function CheckIdle($power)
    {
        $lastpower = GetValue("Aktuelle_Leistung");
        if ($lastpower != GetValue("Aktuelle_Leistung")) {
            $this->SetValue("Idle", false);
            $this->SetValue(
                "IdleCounter",
                $this->ReadPropertyInteger("IdleCounterMax")
            );
        }
        // IdleCounter auslesen und verarbeiten
        $idleCounter = $this->GetValue("IdleCounter");
        if ($idleCounter > 0) {
            $this->SetValue("Idle", false);
            $this->SetValue("IdleCounter", $idleCounter - 1);
        } else {
            $this->SetValue("Idle", true);
        }
    }

    private function ist_nachts()
    {
        date_default_timezone_set("Europe/Berlin"); // Setze hier deine Zeitzone

        $aktuelle_zeit = strtotime(date("H:i")); // Aktuelle Zeit in Stunden und Minuten umwandeln
        $start_nacht = strtotime("22:00"); // Startzeit der Nacht (22 Uhr)
        $ende_nacht = strtotime("07:00"); // Endzeit der Nacht (7 Uhr)

        if ($aktuelle_zeit >= $start_nacht || $aktuelle_zeit < $ende_nacht) {
            return true;
        } else {
            return false;
        }
    }
}

?>