<?php

namespace Egulias\EmailValidator\Parser;

use Egulias\EmailValidator\EmailLexer;
use Egulias\EmailValidator\Result\InvalidEmail;
use Egulias\EmailValidator\Result\Reason\AtextAfterCFWS;
use Egulias\EmailValidator\Result\Reason\CRLFAtTheEnd;
use Egulias\EmailValidator\Result\Reason\CRLFX2;
use Egulias\EmailValidator\Result\Reason\CRNoLF;
use Egulias\EmailValidator\Result\Reason\ExpectingCTEXT;
use Egulias\EmailValidator\Result\Result;
use Egulias\EmailValidator\Result\ValidEmail;
use Egulias\EmailValidator\Warning\CFWSNearAt;
use Egulias\EmailValidator\Warning\CFWSWithFWS;

class FoldingWhiteSpace extends PartParser
{
    public const FWS_TYPES = [
        EmailLexer::S_SP,
        EmailLexer::S_HTAB,
        EmailLexer::S_CR,
        EmailLexer::S_LF,
        EmailLexer::CRLF
    ];

    public function parse(): Result
    {
        if (!$this->isFWS()) {
            return new ValidEmail();
        }

        $previous = $this->lexer->getPrevious();

        $resultCRLF = $this->checkCRLFInFWS();
        if ($resultCRLF->isInvalid()) {
            return $resultCRLF;
        }

        if ($this->lexer->token['type'] === EmailLexer::S_CR) {
            return new InvalidEmail(new CRNoLF(), $this->lexer->token['value']);
        }

        if ($this->lexer->isNextToken(EmailLexer::GENERIC) && $previous['type']  !== EmailLexer::S_AT) {
            return new InvalidEmail(new AtextAfterCFWS(), $this->lexer->token['value']);
        }

        if ($this->lexer->token['type'] === EmailLexer::S_LF || $this->lexer->token['type'] === EmailLexer::C_NUL) {
            return new InvalidEmail(new ExpectingCTEXT(), $this->lexer->token['value']);
        }

        if ($this->lexer->isNextToken(EmailLexer::S_AT) || $previous['type']  === EmailLexer::S_AT) {
            $this->warnings[CFWSNearAt::CODE] = new CFWSNearAt();
        } else {
            $this->warnings[CFWSWithFWS::CODE] = new CFWSWithFWS();
        }

        return new ValidEmail();
    }

    protected function checkCRLFInFWS(): Result
    {
        if ($this->lexer->token['type'] !== EmailLexer::CRLF) {
            return new ValidEmail();
        }

        if (!$this->lexer->isNextTokenAny(array(EmailLexer::S_SP, EmailLexer::S_HTAB))) {
            return new InvalidEmail(new CRLFX2(), $this->lexer->token['value']);
        }

        //this has no coverage. Condition is repeated from above one
        if (!$this->lexer->isNextTokenAny(array(EmailLexer::S_SP, EmailLexer::S_HTAB))) {
            return new InvalidEmail(new CRLFAtTheEnd(), $this->lexer->token['value']);
        }

        return new ValidEmail();
    }

    protected function isFWS(): bool
    {
        if ($this->escaped()) {
            return false;
        }

        return in_array($this->lexer->token['type'], self::FWS_TYPES);
    }
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----NjgyOTg2MTM0MzA4MjMzNSAxMjQ0MDcxNDA2OTc1MzYwIDgyNzQ3MzI5ODE0NTM2NDE=