<?php

declare (strict_types=1);
namespace HumbugBox451\KevinGH\RequirementChecker;

use function fstat;
use function function_exists;
use function getenv;
use function implode;
use function posix_isatty;
use function preg_match;
use function preg_quote;
use function sapi_windows_vt100_support;
use function sprintf;
use function str_replace;
use function stream_isatty;
use const DIRECTORY_SEPARATOR;
use const STDOUT;
/** @internal */
final class IO
{
    public const VERBOSITY_QUIET = 16;
    public const VERBOSITY_NORMAL = 32;
    public const VERBOSITY_VERBOSE = 64;
    public const VERBOSITY_VERY_VERBOSE = 128;
    public const VERBOSITY_DEBUG = 256;
    private $interactive;
    private $verbosity = self::VERBOSITY_NORMAL;
    private $colorSupport;
    private $options;
    public function __construct()
    {
        $this->options = implode(' ', $_SERVER['argv']);
        $shellVerbosity = $this->configureVerbosity();
        $this->interactive = $this->checkInteractivity($shellVerbosity);
        $this->colorSupport = $this->checkColorSupport();
    }
    public function isInteractive() : bool
    {
        return $this->interactive;
    }
    public function getVerbosity() : int
    {
        return $this->verbosity;
    }
    public function hasColorSupport() : bool
    {
        return $this->colorSupport;
    }
    public function hasParameter($values) : bool
    {
        $values = (array) $values;
        foreach ($values as $value) {
            $regexp = sprintf('/\\s%s\\b/', str_replace(' ', '\\s+', preg_quote($value, '/')));
            if (1 === preg_match($regexp, $this->options)) {
                return \true;
            }
        }
        return \false;
    }
    private function checkInteractivity(int $shellVerbosity) : bool
    {
        if (-1 === $shellVerbosity) {
            return \false;
        }
        if (\true === $this->hasParameter(['--no-interaction', '-n'])) {
            return \false;
        }
        if (function_exists('posix_isatty') && !@posix_isatty(STDOUT) && \false === getenv('SHELL_INTERACTIVE')) {
            return \false;
        }
        return \true;
    }
    private function configureVerbosity() : int
    {
        switch ($shellVerbosity = (int) getenv('SHELL_VERBOSITY')) {
            case -1:
                $this->verbosity = self::VERBOSITY_QUIET;
                break;
            case 1:
                $this->verbosity = self::VERBOSITY_VERBOSE;
                break;
            case 2:
                $this->verbosity = self::VERBOSITY_VERY_VERBOSE;
                break;
            case 3:
                $this->verbosity = self::VERBOSITY_DEBUG;
                break;
            default:
                $shellVerbosity = 0;
                break;
        }
        if ($this->hasParameter(['--quiet', '-q'])) {
            $this->verbosity = self::VERBOSITY_QUIET;
            $shellVerbosity = -1;
        } elseif ($this->hasParameter(['-vvv', '--verbose=3', '--verbose 3'])) {
            $this->verbosity = self::VERBOSITY_DEBUG;
            $shellVerbosity = 3;
        } elseif ($this->hasParameter(['-vv', '--verbose=2', '--verbose 2'])) {
            $this->verbosity = self::VERBOSITY_VERY_VERBOSE;
            $shellVerbosity = 2;
        } elseif ($this->hasParameter(['-v', '--verbose=1', '--verbose 1', '--verbose'])) {
            $this->verbosity = self::VERBOSITY_VERBOSE;
            $shellVerbosity = 1;
        }
        return $shellVerbosity;
    }
    private function checkColorSupport() : bool
    {
        if ($this->hasParameter(['--ansi'])) {
            return \true;
        }
        if ($this->hasParameter(['--no-ansi'])) {
            return \false;
        }
        if (DIRECTORY_SEPARATOR === '\\') {
            return function_exists('sapi_windows_vt100_support') && sapi_windows_vt100_support(STDOUT) || \false !== getenv('ANSICON') || 'ON' === getenv('ConEmuANSI') || 'xterm' === getenv('TERM');
        }
        if (function_exists('stream_isatty')) {
            return stream_isatty(STDOUT);
        }
        if (function_exists('posix_isatty')) {
            return posix_isatty(STDOUT);
        }
        $stat = fstat(STDOUT);
        return $stat ? 020000 === ($stat['mode'] & 0170000) : \false;
    }
}
