<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Database\Eloquent\SoftDeletes;

class FeedPurchase extends Model
{
    use SoftDeletes;

    protected $guarded = ['id'];

    protected $casts = [
        'purchase_date' => 'date',
        'total_price' => 'integer',
    ];

    protected static function boot()
    {
        parent::boot();

        static::deleted(function ($feedPurchase) {
            $feedPurchase->revertFeedStock();
        });

        static::forceDeleted(function ($feedPurchase) {
            $feedPurchase->revertFeedStock();
        });

        static::restored(function ($feedPurchase) {
            $feedPurchase->updateFeedStock();
        });
    }

    public function items(): HasMany
    {
        return $this->hasMany(FeedPurchaseItem::class);
    }

    public function updateFeedStock(): void
    {
        foreach ($this->items as $item) {
            $feed = $item->feed;
            if ($feed) {
                $feed->increment('stock', $item->quantity);
            }
        }
    }

    public function revertFeedStock(): void
    {
        foreach ($this->items as $item) {
            $feed = $item->feed;
            if ($feed) {
                $feed->decrement('stock', $item->quantity);
            }
        }
    }
}