<?php

declare(strict_types=1);

namespace App\Framework\Process\ValueObjects\SystemInfo;

use App\Framework\Core\ValueObjects\Byte;

/**
 * Disk Information.
 */
final readonly class DiskInfo
{
    public function __construct(
        public int $totalBytes,
        public int $usedBytes,
        public int $availableBytes,
        public string $mountPoint = '/'
    ) {
    }

    /**
     * Erstellt eine leere DiskInfo Instanz.
     */
    public static function empty(): self
    {
        return new self(0, 0, 0, '/');
    }

    /**
     * Gibt die Auslastung als Prozent zurück (0-100).
     */
    public function getUsagePercentage(): float
    {
        if ($this->totalBytes === 0) {
            return 0.0;
        }

        return ($this->usedBytes / $this->totalBytes) * 100;
    }

    /**
     * Prüft, ob die Disk fast voll ist (>90%).
     */
    public function isAlmostFull(): bool
    {
        return $this->getUsagePercentage() > 90;
    }

    /**
     * Gibt Total als Byte Value Object zurück.
     */
    public function getTotal(): Byte
    {
        return Byte::fromBytes($this->totalBytes);
    }

    /**
     * Gibt Used als Byte Value Object zurück.
     */
    public function getUsed(): Byte
    {
        return Byte::fromBytes($this->usedBytes);
    }

    /**
     * Gibt Available als Byte Value Object zurück.
     */
    public function getAvailable(): Byte
    {
        return Byte::fromBytes($this->availableBytes);
    }

    /**
     * Konvertiert zu Array.
     *
     * @return array<string, mixed>
     */
    public function toArray(): array
    {
        return [
            'mount_point' => $this->mountPoint,
            'total_bytes' => $this->totalBytes,
            'total_human' => $this->getTotal()->toHumanReadable(),
            'used_bytes' => $this->usedBytes,
            'used_human' => $this->getUsed()->toHumanReadable(),
            'available_bytes' => $this->availableBytes,
            'available_human' => $this->getAvailable()->toHumanReadable(),
            'usage_percentage' => round($this->getUsagePercentage(), 2),
            'is_almost_full' => $this->isAlmostFull(),
        ];
    }
}