<?php

class Belevo_PV_Visu extends IPSModule
{
    public function Create()
    {
        parent::Create();
        // vier Properties, in denen später die vier Zähler-Variablen gewählt werden
        $this->RegisterPropertyInteger('VarProduction', 0);
        $this->RegisterPropertyInteger('VarConsumption', 0);
        $this->RegisterPropertyInteger('VarFeedIn', 0);
        $this->RegisterPropertyInteger('VarGrid', 0);
        // HTML-SDK aktivieren
        $this->SetVisualizationType(3);
    }

    public function GetConfigurationForm(): string
    {
        return json_encode([
            'elements' => [
                [
                    'type'    => 'SelectVariable',
                    'name'    => 'VarProduction',
                    'caption' => 'Produktion (kWh)'
                ],
                [
                    'type'    => 'SelectVariable',
                    'name'    => 'VarConsumption',
                    'caption' => 'Verbrauch (kWh)'
                ],
                [
                    'type'    => 'SelectVariable',
                    'name'    => 'VarFeedIn',
                    'caption' => 'Einspeisung (kWh)'
                ],
                [
                    'type'    => 'SelectVariable',
                    'name'    => 'VarGrid',
                    'caption' => 'Bezug Netz (kWh)'
                ]
            ],
            'actions' => []
        ]);
    }

    /**
     * Wird automatisch aufgerufen, wenn die Visu die Tile anfordert
     */
    public function GetVisualizationTile(int $InstanceID): string
    {
        $file = __DIR__ . '/module.html';
        if (!file_exists($file)) {
            return '';
        }
        // Übersetzungen einbinden
        return $this->Translate(file_get_contents($file));
    }

    /**
     * JS-requestAction ruft das auf, um frische Daten anzufordern
     */
    public function RequestAction(string $Ident, $Value): void
    {
        if ($Ident === 'update') {
            $this->Update();
        } else {
            throw new Exception('Unknown Ident');
        }
    }

    /**
     * Berechnet die Tages-Summen und sendet sie an die Visu
     */
    private function Update(): void
    {
        $start = strtotime('today 00:00');
        $end   = time();
        $prod  = $this->GetDailyTotal($this->ReadPropertyInteger('VarProduction'), $start, $end);
        $cons  = $this->GetDailyTotal($this->ReadPropertyInteger('VarConsumption'), $start, $end);
        $feed  = $this->GetDailyTotal($this->ReadPropertyInteger('VarFeedIn'), $start, $end);
        $grid  = $this->GetDailyTotal($this->ReadPropertyInteger('VarGrid'), $start, $end);

        // Quoten berechnen
        $prodCons = $prod > 0 ? ($cons / $prod) * 100 : 0;
        $prodFeed = $prod > 0 ? ($feed / $prod) * 100 : 0;
        $consPV   = $cons > 0 ? (min($cons, $prod) / $cons) * 100 : 0;
        $consGrid = $cons > 0 ? ($grid / $cons) * 100 : 0;

        $data = [
            'prodCons' => round($prodCons, 2),
            'prodFeed' => round($prodFeed, 2),
            'consPV'   => round($consPV, 2),
            'consGrid' => round($consGrid, 2),
            'value'    => [
                'prod' => round($prod, 2),
                'cons' => round($cons, 2),
                'feed' => round($feed, 2),
                'grid' => round($grid, 2)
            ]
        ];
        $this->UpdateVisualizationValue($data);
    }

    /**
     * Ruft den Tages-Gesamtwert aus dem Archiv ab (tägliche Aggregation)
     */
    private function GetDailyTotal(int $varID, int $start, int $end): float
    {
        if ($varID <= 0) {
            return 0.0;
        }
        // Erste Archive-Instanz finden
        $archives = IPS_GetInstanceListByModuleID('{43192F11-5B02-4B5D-9B53-8B4DBD4769E9}');
        if (empty($archives)) {
            return 0.0;
        }
        $archiveID = $archives[0];
        // AC_GetAggregatedValues( InstanzID, VarID, AggregationLevel(1=Täglich), Start, Ende, Limit=1 )
        $values = AC_GetAggregatedValues($archiveID, $varID, 1, $start, $end, 1);
        if (empty($values)) {
            return 0.0;
        }
        // Bei Counter-Variablen enthält 'Avg' die Summe der Deltas
        return (float)$values[0]['Avg'];
    }
}