<?php
/*
* This file is part of sebastian/environment.
*
* (c) Sebastian Bergmann <sebastian@phpunit.de>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/

declare(strict_types=1);

namespace SebastianBergmann\Environment;

final class Console
{
/**
* @var int
*/
const STDIN = 0;

/**
* @var int
*/
const STDOUT = 1;

/**
* @var int
*/
const STDERR = 2;

/**
* Returns true if STDOUT supports colorization.
*
* This code has been copied and adapted from
* Symfony\Component\Console\Output\OutputStream.
*/
public function hasColorSupport(): bool
{
if ($this->isWindows()) {
// @codeCoverageIgnoreStart
return false !== \getenv('ANSICON') || 'ON' === \getenv('ConEmuANSI') || 'xterm' === \getenv('TERM');
// @codeCoverageIgnoreEnd
}

if (!\defined('STDOUT')) {
// @codeCoverageIgnoreStart
return false;
// @codeCoverageIgnoreEnd
}

return $this->isInteractive(STDOUT);
}

/**
* Returns the number of columns of the terminal.
*
* @codeCoverageIgnore
*/
public function getNumberOfColumns(): int
{
if ($this->isWindows()) {
return $this->getNumberOfColumnsWindows();
}

if (!$this->isInteractive(self::STDIN)) {
return 80;
}

return $this->getNumberOfColumnsInteractive();
}

/**
* Returns if the file descriptor is an interactive terminal or not.
*
* @param int|resource $fileDescriptor
*/
public function isInteractive($fileDescriptor = self::STDOUT): bool
{
return \function_exists('posix_isatty') && @\posix_isatty($fileDescriptor);
}

private function isWindows(): bool
{
return DIRECTORY_SEPARATOR === '\\';
}

/**
* @codeCoverageIgnore
*/
private function getNumberOfColumnsInteractive(): int
{
if (\function_exists('shell_exec') && \preg_match('#\d+ (\d+)#', \shell_exec('stty size') ?? '', $match) === 1) {
if ((int) $match[1] > 0) {
return (int) $match[1];
}
}

if (\function_exists('shell_exec') && \preg_match('#columns = (\d+);#', \shell_exec('stty') ?? '', $match) === 1) {
if ((int) $match[1] > 0) {
return (int) $match[1];
}
}

return 80;
}

/**
* @codeCoverageIgnore
*/
private function getNumberOfColumnsWindows(): int
{
$ansicon = \getenv('ANSICON');
$columns = 80;

if (\is_string($ansicon) && \preg_match('/^(\d+)x\d+ \(\d+x(\d+)\)$/', \trim($ansicon), $matches)) {
$columns = $matches[1];
} elseif (\function_exists('proc_open')) {
$process = \proc_open(
'mode CON',
[
1 => ['pipe', 'w'],
2 => ['pipe', 'w']
],
$pipes,
null,
null,
['suppress_errors' => true]
);

if (\is_resource($process)) {
$info = \stream_get_contents($pipes[1]);

\fclose($pipes[1]);
\fclose($pipes[2]);
\proc_close($process);

if (\preg_match('/--------+\r?\n.+?(\d+)\r?\n.+?(\d+)\r?\n/', $info, $matches)) {
$columns = $matches[2];
}
}
}

return $columns - 1;
}
}