<?php
/**
 * Ensures styles are indented 4 spaces.
 *
 * @author    Greg Sherwood <gsherwood@squiz.net>
 * @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600)
 * @license   https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
 */

namespace PHP_CodeSniffer\Standards\Squiz\Sniffs\CSS;

use PHP_CodeSniffer\Files\File;
use PHP_CodeSniffer\Sniffs\Sniff;
use PHP_CodeSniffer\Util\Tokens;

class IndentationSniff implements Sniff
{

    /**
     * A list of tokenizers this sniff supports.
     *
     * @var array
     */
    public $supportedTokenizers = ['CSS'];

    /**
     * The number of spaces code should be indented.
     *
     * @var integer
     */
    public $indent = 4;


    /**
     * Returns the token types that this sniff is interested in.
     *
     * @return int[]
     */
    public function register()
    {
        return [T_OPEN_TAG];

    }//end register()


    /**
     * Processes the tokens that this sniff is interested in.
     *
     * @param \PHP_CodeSniffer\Files\File $phpcsFile The file where the token was found.
     * @param int                         $stackPtr  The position in the stack where
     *                                               the token was found.
     *
     * @return void
     */
    public function process(File $phpcsFile, $stackPtr)
    {
        $tokens = $phpcsFile->getTokens();

        $numTokens    = (count($tokens) - 2);
        $indentLevel  = 0;
        $nestingLevel = 0;
        for ($i = 1; $i < $numTokens; $i++) {
            if ($tokens[$i]['code'] === T_COMMENT
                || isset(Tokens::$phpcsCommentTokens[$tokens[$i]['code']]) === true
            ) {
                // Don't check the indent of comments.
                continue;
            }

            if ($tokens[$i]['code'] === T_OPEN_CURLY_BRACKET) {
                $indentLevel++;

                if (isset($tokens[$i]['bracket_closer']) === false) {
                    // Syntax error or live coding.
                    // Anything after this would receive incorrect fixes, so bow out.
                    return;
                }

                // Check for nested class definitions.
                $found = $phpcsFile->findNext(
                    T_OPEN_CURLY_BRACKET,
                    ($i + 1),
                    $tokens[$i]['bracket_closer']
                );

                if ($found !== false) {
                    $nestingLevel = $indentLevel;
                }
            }

            if (($tokens[$i]['code'] === T_CLOSE_CURLY_BRACKET
                && $tokens[$i]['line'] !== $tokens[($i - 1)]['line'])
                || ($tokens[($i + 1)]['code'] === T_CLOSE_CURLY_BRACKET
                && $tokens[$i]['line'] === $tokens[($i + 1)]['line'])
            ) {
                $indentLevel--;
                if ($indentLevel === 0) {
                    $nestingLevel = 0;
                }
            }

            if ($tokens[$i]['column'] !== 1
                || $tokens[$i]['code'] === T_OPEN_CURLY_BRACKET
                || $tokens[$i]['code'] === T_CLOSE_CURLY_BRACKET
            ) {
                continue;
            }

            // We started a new line, so check indent.
            if ($tokens[$i]['code'] === T_WHITESPACE) {
                $content     = str_replace($phpcsFile->eolChar, '', $tokens[$i]['content']);
                $foundIndent = strlen($content);
            } else {
                $foundIndent = 0;
            }

            $expectedIndent = ($indentLevel * $this->indent);
            if ($expectedIndent > 0
                && strpos($tokens[$i]['content'], $phpcsFile->eolChar) !== false
            ) {
                if ($nestingLevel !== $indentLevel) {
                    $error = 'Blank lines are not allowed in class definitions';
                    $fix   = $phpcsFile->addFixableError($error, $i, 'BlankLine');
                    if ($fix === true) {
                        $phpcsFile->fixer->replaceToken($i, '');
                    }
                }
            } else if ($foundIndent !== $expectedIndent) {
                $error = 'Line indented incorrectly; expected %s spaces, found %s';
                $data  = [
                    $expectedIndent,
                    $foundIndent,
                ];

                $fix = $phpcsFile->addFixableError($error, $i, 'Incorrect', $data);
                if ($fix === true) {
                    $indent = str_repeat(' ', $expectedIndent);
                    if ($foundIndent === 0) {
                        $phpcsFile->fixer->addContentBefore($i, $indent);
                    } else {
                        $phpcsFile->fixer->replaceToken($i, $indent);
                    }
                }
            }//end if
        }//end for

    }//end process()


}//end class
