class ReferenceSpacingSniff

class ReferenceSpacingSniff implements Sniff {
    public const CODE_INCORRECT_SPACES_AFTER_REFERENCE = 'IncorrectSpacesAfterReference';
    
    /** @var int */
    public $spacesCountAfterReference = 0;
    
    /**
     * @return array<int, (int|string)>
     */
    public function register() : array {
        return [
            T_BITWISE_AND,
        ];
    }
    
    /**
     * @phpcsSuppress SlevomatCodingStandard.TypeHints.ParameterTypeHint.MissingNativeTypeHint
     * @param int $referencePointer
     */
    public function process(File $phpcsFile, $referencePointer) : void {
        $this->spacesCountAfterReference = SniffSettingsHelper::normalizeInteger($this->spacesCountAfterReference);
        if (!$this->isReference($phpcsFile, $referencePointer)) {
            return;
        }
        $pointerAfterWhitespace = TokenHelper::findNextNonWhitespace($phpcsFile, $referencePointer + 1);
        $whitespace = TokenHelper::getContent($phpcsFile, $referencePointer + 1, $pointerAfterWhitespace - 1);
        $actualSpacesCount = strlen($whitespace);
        if ($this->spacesCountAfterReference === $actualSpacesCount) {
            return;
        }
        $errorMessage = $this->spacesCountAfterReference === 0 ? 'There must be no whitespace after reference.' : sprintf('There must be exactly %d whitespace%s after reference.', $this->spacesCountAfterReference, $this->spacesCountAfterReference !== 1 ? 's' : '');
        $fix = $phpcsFile->addFixableError($errorMessage, $referencePointer, self::CODE_INCORRECT_SPACES_AFTER_REFERENCE);
        if (!$fix) {
            return;
        }
        $phpcsFile->fixer
            ->beginChangeset();
        $phpcsFile->fixer
            ->addContent($referencePointer, str_repeat(' ', $this->spacesCountAfterReference));
        FixerHelper::removeBetween($phpcsFile, $referencePointer, $pointerAfterWhitespace);
        $phpcsFile->fixer
            ->endChangeset();
    }
    private function isReference(File $phpcsFile, int $referencePointer) : bool {
        $tokens = $phpcsFile->getTokens();
        $previousPointer = TokenHelper::findPreviousEffective($phpcsFile, $referencePointer - 1);
        if (in_array($tokens[$previousPointer]['code'], TokenHelper::$functionTokenCodes, true)) {
            return true;
        }
        $previousParenthesisOpenerPointer = TokenHelper::findPrevious($phpcsFile, T_OPEN_PARENTHESIS, $referencePointer - 1);
        if ($previousParenthesisOpenerPointer !== null && $tokens[$previousParenthesisOpenerPointer]['parenthesis_closer'] > $referencePointer) {
            if (array_key_exists('parenthesis_owner', $tokens[$previousParenthesisOpenerPointer])) {
                $parenthesisOwnerPointer = $tokens[$previousParenthesisOpenerPointer]['parenthesis_owner'];
                if (in_array($tokens[$parenthesisOwnerPointer]['code'], TokenHelper::$functionTokenCodes, true)) {
                    return true;
                }
            }
            $pointerBeforeParenthesisOpener = TokenHelper::findPreviousEffective($phpcsFile, $previousParenthesisOpenerPointer - 1);
            if ($pointerBeforeParenthesisOpener !== null && $tokens[$pointerBeforeParenthesisOpener]['code'] === T_USE) {
                return true;
            }
        }
        
        /** @var int $variableStartPointer */
        $variableStartPointer = TokenHelper::findNextEffective($phpcsFile, $referencePointer + 1);
        $variableEndPointer = IdentificatorHelper::findEndPointer($phpcsFile, $variableStartPointer);
        if ($variableEndPointer === null) {
            return false;
        }
        $previousPointer = TokenHelper::findPreviousEffective($phpcsFile, $referencePointer - 1);
        return in_array($tokens[$previousPointer]['code'], [
            T_EQUAL,
            T_DOUBLE_ARROW,
            T_OPEN_SHORT_ARRAY,
            T_COMMA,
            T_AS,
        ], true);
    }

}