<?php

declare(strict_types=1);

class ShellyParser
{
    /**
     * Extrahiert den Modell-Typ aus src, z.B.:
     * "shelly1g4-12345"      => "1g4"
     * "shellyplusplugs-xyz"  => "plusplugs"
     */
    public static function ExtractType(string $src): string
    {
        if (!str_starts_with($src, 'shelly')) {
            return 'unknown';
        }

        // nach 'shelly' den Rest nehmen
        $rest = substr($src, 6); // z.B. "1g4-12345" oder "mini3-abc"

        // alles vor dem ersten "-" ist der Typ
        $parts = explode('-', $rest);

        return $parts[0] ?? 'unknown';
    }

    /**
     * Geht rekursiv durch params und sammelt bekannte Werte:
     *  - input (bool)
     *  - output (bool)
     *  - temperature (float, inkl. tC)
     */
    public static function MapParams(array $params): array
    {
        $mapped = [
            'input'       => null,
            'output'      => null,
            'temperature' => null
        ];

        self::ExtractRecursive($params, $mapped);

        // null-Werte rauswerfen
        return array_filter($mapped, static function ($v) {
            return $v !== null;
        });
    }

    private static function ExtractRecursive(array $data, array &$mapped): void
    {
        foreach ($data as $key => $value) {
            $lowerKey = strtolower((string)$key);

            if (is_array($value)) {
                // Temperatur in verschachtelter Struktur, z.B. ["temperature" => ["tC" => 41.2]]
                if ($lowerKey === 'temperature') {
                    if (isset($value['tC']) && is_numeric($value['tC'])) {
                        $mapped['temperature'] = (float)$value['tC'];
                    } elseif (isset($value['t']) && is_numeric($value['t'])) {
                        $mapped['temperature'] = (float)$value['t'];
                    }
                }
                self::ExtractRecursive($value, $mapped);
                continue;
            }

            switch ($lowerKey) {
                case 'input':
                    $mapped['input'] = (bool)$value;
                    break;

                case 'output':
                    $mapped['output'] = (bool)$value;
                    break;

                case 'temperature':
                case 'tc':
                case 't':
                    if (is_numeric($value)) {
                        $mapped['temperature'] = (float)$value;
                    }
                    break;
            }
        }
    }
}
?>