<?php

namespace App\Models;

use App\Enums\IpPoolType;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\HasMany;

class IpPool extends Model
{
    protected $fillable = [
        'name',
        'type',
        'start_ip',
        'end_ip',
        'gateway',
        'cidr',
        'description',
        'is_active',
    ];

    protected function casts(): array
    {
        return [
            'type' => IpPoolType::class,
            'cidr' => 'integer',
            'is_active' => 'boolean',
        ];
    }

    public function vms(): HasMany
    {
        return $this->hasMany(Customer::class, 'ip_pool_id');
    }

    public function totalIps(): int
    {
        $start = ip2long($this->start_ip);
        $end = ip2long($this->end_ip);

        if ($start === false || $end === false || $end < $start) {
            return 0;
        }

        return (int) ($end - $start + 1);
    }

    public function usedIpsCount(): int
    {
        $query = Customer::query()
            ->where('ip_pool_id', $this->id)
            ->whereIn('status', ['pending', 'active']);

        if ($this->type === IpPoolType::Public) {
            return $query->whereNotNull('public_ip')->count();
        }

        return $query->whereNotNull('ip_address')->count();
    }

    public function freeIpsCount(): int
    {
        return max(0, $this->totalIps() - $this->usedIpsCount());
    }

    public function containsIp(string $ip): bool
    {
        $long = ip2long($ip);
        $start = ip2long($this->start_ip);
        $end = ip2long($this->end_ip);

        return $long !== false && $long >= $start && $long <= $end;
    }
}