<?php

namespace common\components;

use Yii;

class AsyncConsole
{
    /**
     * Start a detached Yii console command.
     *
     * @param array $arguments Command route followed by positional arguments.
     * @param string $logName
     * @return bool
     */
    public static function run(array $arguments, $logName = 'async-console.log')
    {
        if (empty($arguments)) {
            Yii::warning('Unable to start async console command: command arguments are empty');
            return false;
        }
        if (!self::canExec()) {
            Yii::warning('Unable to start async console command: exec is disabled');
            return false;
        }

        $phpBinary = getenv('PHP_CLI_BINARY') ?: '/usr/local/bin/php';
        $yii = dirname(Yii::getAlias('@console')) . '/yii';
        if (!is_file($phpBinary) || !is_executable($phpBinary)) {
            Yii::warning('Unable to start async console command: invalid PHP_CLI_BINARY ' . $phpBinary);
            return false;
        }
        if (!is_file($yii) || !is_executable($yii)) {
            Yii::warning('Unable to start async console command: yii entrypoint is not executable ' . $yii);
            return false;
        }

        $logName = basename($logName);
        $logFile = Yii::getAlias('@console/runtime/logs') . '/' . $logName;
        $escapedArguments = array_map(function ($argument) {
            return escapeshellarg((string)$argument);
        }, $arguments);
        $command = 'nohup '
            . escapeshellarg($phpBinary) . ' '
            . escapeshellarg($yii) . ' '
            . implode(' ', $escapedArguments)
            . ' >> ' . escapeshellarg($logFile)
            . ' 2>&1 < /dev/null &';

        $output = [];
        $exitCode = 0;
        exec($command, $output, $exitCode);
        if ($exitCode !== 0) {
            Yii::warning('Unable to start async console command, exit code: ' . $exitCode);
            return false;
        }
        return true;
    }

    private static function canExec()
    {
        if (!is_callable('exec')) {
            return false;
        }
        $disabled = array_filter(array_map('trim', explode(',', (string)ini_get('disable_functions'))));
        return !in_array('exec', $disabled, true);
    }
}