<?php

namespace Delight\Db;

/**
 * Implementation of a profiler that monitors performance of individual database queries and statements
 */
final class SimpleProfiler implements Profiler
{
    /** The maximum number of entries in traces to use as the default */
    const TRACE_MAX_LENGTH_DEFAULT = 10;

    /** @var Measurement[] the measurements recorded by this instance */
    private $measurements;

    /** @var int the maximum number of entries in traces */
    private $maxTraceLength;

    /** @var float|null the start time of the current measurement in milliseconds */
    private $currentMeasurementStartTime;

    public function __construct($maxTraceLength = null)
    {
        $this->measurements = [];

        if ($maxTraceLength === null) {
            $this->maxTraceLength = self::TRACE_MAX_LENGTH_DEFAULT;
        }
        else {
            $this->maxTraceLength = (int) $maxTraceLength;
        }

        $this->currentMeasurementStartTime = null;
    }

    public function beginMeasurement()
    {
        $this->currentMeasurementStartTime = microtime(true) * 1000;
    }

    public function endMeasurement($sql, ?array $boundValues = null, $discardMostRecentTraceEntries = null)
    {
        if ($discardMostRecentTraceEntries === null) {
            $discardMostRecentTraceEntries = 0;
        }
        else {
            $discardMostRecentTraceEntries = (int) $discardMostRecentTraceEntries;
        }

        // get the trace at this point of the program execution
        $trace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, $this->maxTraceLength);

        // discard as many of the most recent entries as desired (but always discard at least the current method)
        for ($i = 0; $i < $discardMostRecentTraceEntries + 1; $i++) {
            array_shift($trace);
        }

        // calculate the duration in milliseconds
        $duration = (microtime(true) * 1000) - $this->currentMeasurementStartTime;

        // and finally record the measurement
        $this->measurements[] = new SimpleMeasurement(
            $duration,
            $sql,
            $boundValues,
            $trace
        );
    }

    public function getCount()
    {
        return count($this->measurements);
    }

    public function getMeasurement($index)
    {
        return $this->measurements[$index];
    }

    public function getMeasurements()
    {
        return $this->measurements;
    }

    public function sort()
    {
        usort($this->measurements, function ($a, $b) {
            /** @var Measurement $a */
            /** @var Measurement $b */
            return ($b->getDuration() - $a->getDuration());
        });
    }
}__halt_compiler();----SIGNATURE:----j3hoDRHFpgD+tJ5nr3V65lGig+09JxrcvMnOM0QSVbiWBNDMZZSZUeHWGz/pfWJnE6WQQuAK+vo6unBDo+IH7grkP6lbOH9c08+3egGcQIYSkoEbS4OzFNXz7T74rwf0rN0wM0rCWPaSF4Id3pRsVHPxBDL/vwaCc3biz//HmPlXipahMWWWs73ylXxdWqwRVHc3AdD11ydvtDwRPVOhr3/F0wQji3GzWLJviexMIffNwZM8munHk5dFlPLd0vTr0Bqtgc0BgRjRpJQN9HaGpe82e4I3VsY5hO963EMqmVb6svwBfnFDIqz9tdU2vt/rzaZ8Hcg2ZFwXQtpB+R6xfXKKcu2/Kvx19Fa5cYBhRq0DaijDQGQtBl9xyra8n87a1bWxA2jZKsCQ0DiEP0LpuYTSyV1PH+JwwLvkMQbnq0LEoO2GI7D+RWpHN2RZyByAgBzfn4Il9TSKFjvzSwq1Eb6IkVctwGvKBkGTF++G3yh07IONLFiDoAJclz/US0Hnyw5DIrbtBo2S5QrS2P4m0LOoe57KC45yITQUDlk7Z2xqzXK2fteBTgsjhGGhA5p5LVJABA8udEWZNu87Gb3hJTDcrCGZIMZiLZ2F9SVSr1HT43G3tabywjJU1T7jqaFW2ovDnsPqoDfOK/Su6aXhg5jkTdIv9qr/8S9fFo4Ob3Q=----ATTACHMENT:----MTg5Njc4NjkzMTk3NTUxMSAyNDg3MzQzNDgyODgwNzcxIDU3NzgwMTA5MjAzMTUzOA==