#!/usr/bin/env php
<?php
/**
 * Copyright © OXID eSales AG. All rights reserved.
 * See LICENSE file for license details.
 */

/**
 * Extract the number of errors, warnings and affected files from the phpcs summary
 *
 * @param array $output
 *
 * @return array With statistics about 'errorsCount' => nr of errors, 'warningsCount' => nr of warnings,  'filesCount' => nr of affected files,
 */
function extractStatistics($output)
{
    $result = false;
    $matches = array();

    /**
     * The only key of the filtered array already holds the summary.
     * $errorSummary is NULL, if the summary was not present in the output
     */
    $filteredOutput = array_filter($output, 'filterTotalSummary');
    $errorSummary = reset($filteredOutput);

    /** Extract the stats for the summary */
    if ($errorSummary) {
        preg_match('/(?P<errorsCount>\d+).*(?P<warningsCount>\d+).*(?P<filesCount>\d+)/', $errorSummary, $matches);
    }

    /** Validate the result of extraction */
    if (
        array_key_exists('errorsCount', $matches) &&
        array_key_exists('warningsCount', $matches) &&
        array_key_exists('filesCount', $matches)

    ) {
        /** We need integers for the further processing */
        $result = array_map('intval', $matches);
    }

    return $result;
}

/**
 * Callback function for array_filter.
 * Return true, if a given string contains the substring 'A TOTAL OF'
 *
 * @param string $value
 *
 * @return bool
 */
function filterTotalSummary($value)
{
    return false !== strpos($value, 'A TOTAL OF');
}

$scriptPath = array_shift($argv);
$threshold = (int)getenv('OXID_ESHOP_CS_THRESHOLD') ?: 1200;

$command = 'vendor/bin/phpcs --standard=PSR12 --report=summary --extensions=php source/';
$result = exec($command, $output, $return);

$statistics = extractStatistics($output);
if (!$statistics) {
    echo 'Error occurred when parsing phpcsoxid result.' . PHP_EOL;
    echo 'phpcs commmand was: ' . $command . PHP_EOL;
    exit(1);
}

$errorsCount = $statistics['errorsCount'];
if ($errorsCount > $threshold) {
    echo "Code sniffer check FAILED! Current threshold is set to $threshold, but the amount of errors is $errorsCount." . PHP_EOL;
    echo "You added some code, which is not compliant with the coding standards of OXID eShop." . PHP_EOL;
    echo "Please, https://github.com/OXID-eSales/coding_standards for more information." . PHP_EOL;
    echo "For diagnostics compare the summary of this code sniffer run with the summary of the last successful run." . PHP_EOL;
    echo PHP_EOL;
    echo 'CODE SNIFFER SUMMARY' . PHP_EOL;
    echo '--------------------' . PHP_EOL;
    echo implode(PHP_EOL, $output);
    exit(1);
}

echo "Code sniffer check passed successfully! Errors count is $errorsCount, threshold is set to $threshold." . PHP_EOL;
echo 'CODE SNIFFER SUMMARY' . PHP_EOL;
echo '--------------------' . PHP_EOL;
echo implode(PHP_EOL, $output);
exit(0);