<?php

namespace Doctrine\DBAL\Logging;

use function microtime;

/**
 * Includes executed SQLs in a Debug Stack.
 */
class DebugStack implements SQLLogger
{
    /**
     * Executed SQL queries.
     *
     * @var mixed[][]
     */
    public $queries = [];

    /**
     * If Debug Stack is enabled (log queries) or not.
     *
     * @var bool
     */
    public $enabled = true;

    /** @var float|null */
    public $start = null;

    /** @var int */
    public $currentQuery = 0;

    /**
     * {@inheritdoc}
     */
    public function startQuery($sql, ?array $params = null, ?array $types = null)
    {
        if (! $this->enabled) {
            return;
        }

        $this->start                          = microtime(true);
        $this->queries[++$this->currentQuery] = ['sql' => $sql, 'params' => $params, 'types' => $types, 'executionMS' => 0];
    }

    /**
     * {@inheritdoc}
     */
    public function stopQuery()
    {
        if (! $this->enabled) {
            return;
        }

        $this->queries[$this->currentQuery]['executionMS'] = microtime(true) - $this->start;
    }
}