<?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:----MjcxMzkxMDc2NDY0NzE3IDIyNzgzMzEwMDA3NDg1MCAzOTU0NjY5OTU1NDQxNjMy