<?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:----Njk0MzQ1MjU3NzMzMzUyOCA1NTIxMTA0MjIzMjg3ODEzIDE2MDA5Mzc2OTg0NDM0OTY=