<?php

namespace CrazyFactory\Jobs;

class Job
{

    /**
     * @param callable $function
     * @param int      $time_limit
     * @param int      $error_reporting
     *
     * @throws \Throwable
     */
    public static function run(callable $function, $time_limit = 0, $error_reporting = E_ALL)
    {
        set_time_limit($time_limit);
        error_reporting($error_reporting);

        $exitCode = 1;

        try {
            if (static::shouldRun()) {
                $exitCode = static::determineExitCode(call_user_func($function));
            }
        } catch (\Throwable $exception) {
            echo 'Message: ' . $exception->getMessage() . PHP_EOL;
            echo 'Origin: ' . $exception->getFile() . ':' . $exception->getLine() . PHP_EOL;
            echo 'Trace: ' . $exception->getTraceAsString();
            throw $exception;
        } finally {
            exit($exitCode);
        }
    }

    /**
     * @return bool
     */
    protected static function shouldRun()
    {
        return php_sapi_name() == 'cli';
    }

    /**
     * @param null|bool|int $returnValue
     *
     * @return int
     */
    protected static function determineExitCode($returnValue = null)
    {
        // numbers from 0-255 get returned directly.
        if (is_numeric($returnValue) && $returnValue >= 0 && $returnValue <= 255) {
            return intval($returnValue);
        }

        // an explicit false will trigger and error. everything else will be treated as success
        return ($returnValue === false)
            ? 1
            : 0;
    }
}