<?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:----NTY4MTc2MzQ5MDMxMDE1NSAxMTU4Mzg3OTM0NTgzMDY0IDk5ODQ5ODc1NTQ0MzMzNTQ=