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<?php

namespace Doctrine\DBAL\Cache;

use ArrayIterator;
use Doctrine\DBAL\Driver\FetchUtils;
use Doctrine\DBAL\Driver\Result;
use Doctrine\DBAL\Driver\ResultStatement;
use Doctrine\DBAL\FetchMode;
use InvalidArgumentException;
use IteratorAggregate;
use PDO;
use ReturnTypeWillChange;

use function array_merge;
use function array_values;
use function count;
use function reset;

/**
 * @deprecated
 */
class ArrayStatement implements IteratorAggregate, ResultStatement, Result
{
    /** @var mixed[] */
    private $data;

    /** @var int */
    private $columnCount = 0;

    /** @var int */
    private $num = 0;

    /** @var int */
    private $defaultFetchMode = FetchMode::MIXED;

    /**
     * @param mixed[] $data
     */
    public function __construct(array $data)
    {
        $this->data = $data;
        if (! count($data)) {
            return;
        }

        $this->columnCount = count($data[0]);
    }

    /**
     * {@inheritdoc}
     *
     * @deprecated Use free() instead.
     */
    public function closeCursor()
    {
        $this->free();

        return true;
    }

    /**
     * {@inheritdoc}
     */
    public function rowCount()
    {
        return count($this->data);
    }

    /**
     * {@inheritdoc}
     */
    public function columnCount()
    {
        return $this->columnCount;
    }

    /**
     * {@inheritdoc}
     *
     * @deprecated Use one of the fetch- or iterate-related methods.
     */
    public function setFetchMode($fetchMode, $arg2 = null, $arg3 = null)
    {
        if ($arg2 !== null || $arg3 !== null) {
            throw new InvalidArgumentException('Caching layer does not support 2nd/3rd argument to setFetchMode()');
        }

        $this->defaultFetchMode = $fetchMode;

        return true;
    }

    /**
     * {@inheritdoc}
     *
     * @deprecated Use iterateNumeric(), iterateAssociative() or iterateColumn() instead.
     */
    #[ReturnTypeWillChange]
    public function getIterator()
    {
        $data = $this->fetchAll();

        return new ArrayIterator($data);
    }

    /**
     * {@inheritdoc}
     *
     * @deprecated Use fetchNumeric(), fetchAssociative() or fetchOne() instead.
     */
    public function fetch($fetchMode = null, $cursorOrientation = PDO::FETCH_ORI_NEXT, $cursorOffset = 0)
    {
        if (! isset($this->data[$this->num])) {
            return false;
        }

        $row       = $this->data[$this->num++];
        $fetchMode = $fetchMode ?: $this->defaultFetchMode;

        if ($fetchMode === FetchMode::ASSOCIATIVE) {
            return $row;
        }

        if ($fetchMode === FetchMode::NUMERIC) {
            return array_values($row);
        }

        if ($fetchMode === FetchMode::MIXED) {
            return array_merge($row, array_values($row));
        }

        if ($fetchMode === FetchMode::COLUMN) {
            return reset($row);
        }

        throw new InvalidArgumentException('Invalid fetch-style given for fetching result.');
    }

    /**
     * {@inheritdoc}
     *
     * @deprecated Use fetchAllNumeric(), fetchAllAssociative() or fetchFirstColumn() instead.
     */
    public function fetchAll($fetchMode = null, $fetchArgument = null, $ctorArgs = null)
    {
        $rows = [];
        while ($row = $this->fetch($fetchMode)) {
            $rows[] = $row;
        }

        return $rows;
    }

    /**
     * {@inheritdoc}
     *
     * @deprecated Use fetchOne() instead.
     */
    public function fetchColumn($columnIndex = 0)
    {
        $row = $this->fetch(FetchMode::NUMERIC);

        // TODO: verify that return false is the correct behavior
        return $row[$columnIndex] ?? false;
    }

    /**
     * {@inheritdoc}
     */
    public function fetchNumeric()
    {
        $row = $this->doFetch();

        if ($row === false) {
            return false;
        }

        return array_values($row);
    }

    /**
     * {@inheritdoc}
     */
    public function fetchAssociative()
    {
        return $this->doFetch();
    }

    /**
     * {@inheritdoc}
     */
    public function fetchOne()
    {
        $row = $this->doFetch();

        if ($row === false) {
            return false;
        }

        return reset($row);
    }

    /**
     * {@inheritdoc}
     */
    public function fetchAllNumeric(): array
    {
        return FetchUtils::fetchAllNumeric($this);
    }

    /**
     * {@inheritdoc}
     */
    public function fetchAllAssociative(): array
    {
        return FetchUtils::fetchAllAssociative($this);
    }

    /**
     * {@inheritdoc}
     */
    public function fetchFirstColumn(): array
    {
        return FetchUtils::fetchFirstColumn($this);
    }

    public function free(): void
    {
        $this->data = [];
    }

    /**
     * @return mixed|false
     */
    private function doFetch()
    {
        if (! isset($this->data[$this->num])) {
            return false;
        }

        return $this->data[$this->num++];
    }
}