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

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

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

        return new ValidEmail();
    }

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

        return in_array(((array) $this->lexer->token)['type'], self::FWS_TYPES);
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----NDUyNDU3ODMyODQzNTIwOCA1NjA1NjcxOTgwMzQ0MzQgMjA0MTg2MDU4MTgzMzc1OQ==