<?php

declare(strict_types=1);

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;

class PurchaseOrder extends Model
{
    use HasFactory;

    protected static function booted()
    {
        static::creating(function ($purchaseOrder) {
            // Auto-generate PO number if not provided
            if (empty($purchaseOrder->po_number)) {
                $prefix = 'CMD-' . now()->format('Ym') . '-';
                $lastOrder = self::where('po_number', 'like', $prefix . '%')
                    ->orderBy('po_number', 'desc')
                    ->first();

                if ($lastOrder) {
                    $lastNumber = intval(substr($lastOrder->po_number, -4));
                    $newNumber = $lastNumber + 1;
                } else {
                    $newNumber = 1;
                }

                $purchaseOrder->po_number = $prefix . str_pad((string)$newNumber, 4, '0', STR_PAD_LEFT);
            }
        });
    }

    protected $fillable = [
        'fournisseur_id',
        'po_number',
        'status',
        'order_date',
        'expected_date',
        'currency',
        'total_ht',
        'total_tva',
        'total_ttc',
        'notes',
        'delivery_address',
    ];

    protected $casts = [
        'order_date' => 'date',
        'expected_date' => 'date',
        'total_ht' => 'decimal:2',
        'total_tva' => 'decimal:2',
        'total_ttc' => 'decimal:2',
    ];

    public function fournisseur(): BelongsTo
    {
        return $this->belongsTo(Fournisseur::class);
    }

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