<?php

namespace ByJG\AnyDataset\Db;

use ByJG\AnyDataset\Core\Exception\IteratorException;
use ByJG\AnyDataset\Core\GenericIterator;
use ByJG\AnyDataset\Core\Row;

class Oci8Iterator extends GenericIterator
{
    const RECORD_BUFFER = 50;

    private $rowBuffer;
    protected $currentRow = 0;
    protected $moveNextRow = 0;

    /** @var resource Cursor */
    private $cursor;

    /**
     * @param resource $cursor
     */
    public function __construct($cursor)
    {
        $this->cursor = $cursor;
        $this->rowBuffer = array();
    }

    /**
     * @access public
     * @return int
     */
    public function count()
    {
        return -1;
    }

    /**
     * @access public
     * @return bool
     * @throws \ByJG\Serializer\Exception\InvalidArgumentException
     */
    public function hasNext()
    {
        if (count($this->rowBuffer) >= Oci8Iterator::RECORD_BUFFER) {
            return true;
        }

        if (is_null($this->cursor)) {
            return (count($this->rowBuffer) > 0);
        }

        $rowArray = oci_fetch_array($this->cursor, OCI_ASSOC + OCI_RETURN_NULLS);
        if (!empty($rowArray)) {
            $rowArray = array_change_key_case($rowArray, CASE_LOWER);
            $singleRow = new Row($rowArray);

            $this->currentRow++;

            // Enfileira o registo
            array_push($this->rowBuffer, $singleRow);
            // Traz novos até encher o Buffer
            if (count($this->rowBuffer) < DbIterator::RECORD_BUFFER) {
                $this->hasNext();
            }
            return true;
        }

        oci_free_statement($this->cursor);
        $this->cursor = null;
        return (count($this->rowBuffer) > 0);
    }

    public function __destruct()
    {
        if (!is_null($this->cursor)) {
            oci_free_statement($this->cursor);
            $this->cursor = null;
        }
    }

    /**
     * @return mixed
     * @throws IteratorException
     * @throws \ByJG\Serializer\Exception\InvalidArgumentException
     */
    public function moveNext()
    {
        if (!$this->hasNext()) {
            throw new IteratorException("No more records. Did you used hasNext() before moveNext()?");
        } else {
            $row = array_shift($this->rowBuffer);
            $this->moveNextRow++;
            return $row;
        }
    }

    public function key()
    {
        return $this->moveNextRow;
    }
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----NjA1MzA2ODc5MzI3ODc4NSA1ODE3ODgwMjE2MjE5NDI3IDcxNzU0NjgyOTkzMzk5OTk=