<?php

namespace App\Services;

use App\Models\Message;

class UptimeService
{
    /**
     * @return array{system: string, fox: string}
     */
    public function collect(): array
    {
        return [
            'system' => $this->systemUptime(),
            'fox' => $this->foxUptime(),
        ];
    }

    protected function systemUptime(): string
    {
        $data = (string) @file_get_contents('/proc/uptime');
        $seconds = (int) round((float) explode(' ', trim($data))[0]);

        return $this->humanize($seconds);
    }

    protected function foxUptime(): string
    {
        $first = Message::oldest()->first();

        if (! $first) {
            return 'soeben gestartet';
        }

        return $first->created_at->diffForHumans(null, true).' aktiv';
    }

    protected function humanize(int $seconds): string
    {
        if ($seconds < 60) {
            return "{$seconds}s";
        }
        $d = intdiv($seconds, 86400);
        $h = intdiv($seconds % 86400, 3600);
        $m = intdiv($seconds % 3600, 60);

        $parts = [];
        if ($d) {
            $parts[] = "{$d}d";
        }
        if ($h) {
            $parts[] = "{$h}h";
        }
        if ($m && ! $d) {
            $parts[] = "{$m}m";
        }

        return implode(' ', $parts) ?: '0m';
    }
}