<?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:----NzA2NTU3MTA0NjY2ODA5MyA4NDAzNTI1MDY0MjkwOTE4IDI4NzYwNTA3MTg1MzY1NTc=