<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace Matomo\Dependencies\Symfony\Component\Console;

class Terminal
{
    private static $width;
    private static $height;
    private static $stty;
    /**
     * Gets the terminal width.
     *
     * @return int
     */
    public function getWidth()
    {
        $width = getenv('COLUMNS');
        if (\false !== $width) {
            return (int) trim($width);
        }
        if (null === self::$width) {
            self::initDimensions();
        }
        return self::$width ?: 80;
    }
    /**
     * Gets the terminal height.
     *
     * @return int
     */
    public function getHeight()
    {
        $height = getenv('LINES');
        if (\false !== $height) {
            return (int) trim($height);
        }
        if (null === self::$height) {
            self::initDimensions();
        }
        return self::$height ?: 50;
    }
    /**
     * @internal
     */
    public static function hasSttyAvailable() : bool
    {
        if (null !== self::$stty) {
            return self::$stty;
        }
        // skip check if shell_exec function is disabled
        if (!\function_exists('shell_exec')) {
            return \false;
        }
        return self::$stty = (bool) shell_exec('stty 2> ' . ('\\' === \DIRECTORY_SEPARATOR ? 'NUL' : '/dev/null'));
    }
    private static function initDimensions()
    {
        if ('\\' === \DIRECTORY_SEPARATOR) {
            $ansicon = getenv('ANSICON');
            if (\false !== $ansicon && preg_match('/^(\\d+)x(\\d+)(?: \\((\\d+)x(\\d+)\\))?$/', trim($ansicon), $matches)) {
                // extract [w, H] from "wxh (WxH)"
                // or [w, h] from "wxh"
                self::$width = (int) $matches[1];
                self::$height = isset($matches[4]) ? (int) $matches[4] : (int) $matches[2];
            } elseif (!self::hasVt100Support() && self::hasSttyAvailable()) {
                // only use stty on Windows if the terminal does not support vt100 (e.g. Windows 7 + git-bash)
                // testing for stty in a Windows 10 vt100-enabled console will implicitly disable vt100 support on STDOUT
                self::initDimensionsUsingStty();
            } elseif (null !== ($dimensions = self::getConsoleMode())) {
                // extract [w, h] from "wxh"
                self::$width = (int) $dimensions[0];
                self::$height = (int) $dimensions[1];
            }
        } else {
            self::initDimensionsUsingStty();
        }
    }
    /**
     * Returns whether STDOUT has vt100 support (some Windows 10+ configurations).
     */
    private static function hasVt100Support() : bool
    {
        return \function_exists('sapi_windows_vt100_support') && sapi_windows_vt100_support(fopen('php://stdout', 'w'));
    }
    /**
     * Initializes dimensions using the output of an stty columns line.
     */
    private static function initDimensionsUsingStty()
    {
        if ($sttyString = self::getSttyColumns()) {
            if (preg_match('/rows.(\\d+);.columns.(\\d+);/i', $sttyString, $matches)) {
                // extract [w, h] from "rows h; columns w;"
                self::$width = (int) $matches[2];
                self::$height = (int) $matches[1];
            } elseif (preg_match('/;.(\\d+).rows;.(\\d+).columns/i', $sttyString, $matches)) {
                // extract [w, h] from "; h rows; w columns"
                self::$width = (int) $matches[2];
                self::$height = (int) $matches[1];
            }
        }
    }
    /**
     * Runs and parses mode CON if it's available, suppressing any error output.
     *
     * @return int[]|null An array composed of the width and the height or null if it could not be parsed
     */
    private static function getConsoleMode() : ?array
    {
        $info = self::readFromProcess('mode CON');
        if (null === $info || !preg_match('/--------+\\r?\\n.+?(\\d+)\\r?\\n.+?(\\d+)\\r?\\n/', $info, $matches)) {
            return null;
        }
        return [(int) $matches[2], (int) $matches[1]];
    }
    /**
     * Runs and parses stty -a if it's available, suppressing any error output.
     */
    private static function getSttyColumns() : ?string
    {
        return self::readFromProcess('stty -a | grep columns');
    }
    private static function readFromProcess(string $command) : ?string
    {
        if (!\function_exists('proc_open')) {
            return null;
        }
        $descriptorspec = [1 => ['pipe', 'w'], 2 => ['pipe', 'w']];
        $cp = \function_exists('sapi_windows_cp_set') ? sapi_windows_cp_get() : 0;
        if (!($process = @proc_open($command, $descriptorspec, $pipes, null, null, ['suppress_errors' => \true]))) {
            return null;
        }
        $info = stream_get_contents($pipes[1]);
        fclose($pipes[1]);
        fclose($pipes[2]);
        proc_close($process);
        if ($cp) {
            sapi_windows_cp_set($cp);
        }
        return $info;
    }
}