<?php

namespace NoccyLabs\Hotfix\System;

use Symfony\Component\Console\Application;

class Facts
{
    private $facts;

    public static function getSystemFacts()
    {
        static $facts;
        if (!$facts) {
            $facts = new self();
            $facts->read();
        }
        return $facts;
    }

    public function read()
    {
        $facts = [];

        $facts['lsb'] = $this->readLsbInfo();
        $facts['system'] = $this->readSystemInfo();
        
        $this->facts = $facts;
    }

    private function readLsbInfo()
    {
        $has_lsb_release = exec("which lsb_release");
        if ($has_lsb_release) {
            exec("lsb_release -idrcs", $output);
            $facts = (object)[
                'id' => strtolower($output[0]),
                'description' => $output[1],
                'release' => $output[2],
                'codename' => $output[3]
            ];
        } elseif (file_exists("/etc/os-release")) {
            $ini = parse_ini_file("/etc/os-release");
            $facts = (object)[
                'id' => strtolower(@$ini['ID']),
                'description' => @$ini['PRETTY_NAME'],
                'release' => @$ini['VERSION_ID'],
                'codename' => @$ini['VERSION_CODENAME']
            ];
        }
        return $facts;
    }

    private function readSystemInfo()
    {

        $facts = (object)[
            'bits' => trim(exec('getconf LONG_BIT')),
            'arch' => trim(exec('uname -m')),  
        ];

        return $facts;

    }

    public function getFacts()
    {
        return $this->facts;
    }

    public function getFlat()
    {
        return $this->flatten($this->facts, []);
    }

    private function flatten($facts, array $path)
    {
        $ret = [];
        foreach ((array)$facts as $fact=>$value) {
            $sub = array_merge($path, [ $fact ]);
            if (is_object($value)) {
                $ret = array_merge($ret, $this->flatten($value, $sub));
            } else {
                $ret[join(".",$sub)] = $value;
            }
        }
        return $ret;
    }

}