<?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:----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----ATTACHMENT:----MzEzNDI0MjI2MzY3NDk4OCA4MzA4Njk5ODA4MjI1Njc1IDkzODkxODg1NTQ2MjUxNzk=