<?php

declare(strict_types=1);

namespace Doctrine\ORM\Query\AST\Functions;

use Doctrine\ORM\Query\AST\Node;
use Doctrine\ORM\Query\AST\SimpleArithmeticExpression;
use Doctrine\ORM\Query\Lexer;
use Doctrine\ORM\Query\Parser;
use Doctrine\ORM\Query\SqlWalker;

/**
 * "LOCATE" "(" StringPrimary "," StringPrimary ["," SimpleArithmeticExpression]")"
 *
 * @link    www.doctrine-project.org
 */
class LocateFunction extends FunctionNode
{
    /** @var Node */
    public $firstStringPrimary;

    /** @var Node */
    public $secondStringPrimary;

    /** @var SimpleArithmeticExpression|bool */
    public $simpleArithmeticExpression = false;

    /**
     * @override
     * @inheritdoc
     */
    public function getSql(SqlWalker $sqlWalker)
    {
        return $sqlWalker->getConnection()->getDatabasePlatform()->getLocateExpression(
            $sqlWalker->walkStringPrimary($this->secondStringPrimary), // its the other way around in platform
            $sqlWalker->walkStringPrimary($this->firstStringPrimary),
            ($this->simpleArithmeticExpression
                ? $sqlWalker->walkSimpleArithmeticExpression($this->simpleArithmeticExpression)
                : false
            )
        );
    }

    /**
     * @override
     * @inheritdoc
     */
    public function parse(Parser $parser)
    {
        $parser->match(Lexer::T_IDENTIFIER);
        $parser->match(Lexer::T_OPEN_PARENTHESIS);

        $this->firstStringPrimary = $parser->StringPrimary();

        $parser->match(Lexer::T_COMMA);

        $this->secondStringPrimary = $parser->StringPrimary();

        $lexer = $parser->getLexer();
        if ($lexer->isNextToken(Lexer::T_COMMA)) {
            $parser->match(Lexer::T_COMMA);

            $this->simpleArithmeticExpression = $parser->SimpleArithmeticExpression();
        }

        $parser->match(Lexer::T_CLOSE_PARENTHESIS);
    }
}