<?php

namespace App\Observers;

use App\Models\RepairOrder;
use App\Models\Vehicle;
use App\Models\Part;
use App\Models\MaintenanceSchedule;
use Carbon\Carbon;
use Illuminate\Support\Str;


class PartObserver
{
    /**
     * Handle the Part "creating" event.
     */
    public function creating(Part $part): void
    {
        // Generate part number if not provided
        if (empty($part->part_number)) {
            $prefix = 'P-';
            $partName = Str::slug(substr($part->name, 0, 3));
            $latest = Part::where('part_number', 'like', $prefix . $partName . '%')
                ->orderBy('part_number', 'desc')
                ->first();

            $number = 1;
            if ($latest) {
                $parts = explode('-', $latest->part_number);
                $number = intval(end($parts)) + 1;
            }

            $part->part_number = $prefix . $partName . '-' . str_pad($number, 4, '0', STR_PAD_LEFT);
        }
    }

    /**
     * Handle the Part "updated" event.
     */
    public function updated(Part $part): void
    {
        // If stock drops below reorder level, could trigger notifications
        if ($part->isDirty('quantity_in_stock') && $part->quantity_in_stock <= $part->reorder_level) {
            // Notification logic could go here
        }
    }
}