<?php

require_once(APPDIR."/Measurement/Measurement.php");
require_once(APPDIR."/Measurement/MeasurementModel.php");

class MeasurementsApicontroller extends mfBaseApicontroller
{
    protected function init()
    {
        // Initialize database connection if needed
        $this->addRoute("/measurements/latest", "getLatestMeasurements", "GET");
    }

    /**
     * Get the latest measurements grouped by unique device_id and sensor_id combinations
     * Returns one measurement per combination, limited to 50 results
     */
    protected function getLatestMeasurements()
    {
        // Get limit from query parameters, default to 50, max 100
        $limit = 50;
        if (isset($this->get['limit']) && is_numeric($this->get['limit'])) {
            $limit = min(100, max(1, intval($this->get['limit'])));
        }

        // Get the latest measurements grouped by device_id and sensor_id
        $measurements = MeasurementModel::getLatestGroupedByDeviceAndSensor($limit);

        $result = [];
        foreach ($measurements as $measurement) {
            $result[] = [
                'id' => $measurement->id,
                'device_id' => $measurement->device_id,
                'sensor_id' => $measurement->sensor_id,
                'value' => (float)$measurement->value,
                'unit' => $measurement->unit,
                'timestamp' => $measurement->create,
                'created_at' => date('Y-m-d H:i:s', $measurement->create)
            ];
        }

        return mfResponse::Ok([
            'count' => count($result),
            'measurements' => $result
        ]);
    }
}