<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;

class PurchaseOrder extends Model
{
    public const STATUS_DRAFT = 'draft';
    public const STATUS_ORDERED = 'ordered';
    public const STATUS_PARTIAL = 'partial';
    public const STATUS_RECEIVED = 'received';
    public const STATUS_CANCELLED = 'cancelled';

    protected $fillable = [
        'po_number',
        'company_id',
        'supplier_id',
        'location_id',
        'status',
        'expected_date',
        'total_amount',
        'notes',
        'created_by',
    ];

    protected function casts(): array
    {
        return [
            'expected_date' => 'date',
            'total_amount' => 'decimal:2',
        ];
    }

    public function company(): BelongsTo
    {
        return $this->belongsTo(Company::class);
    }

    public function supplier(): BelongsTo
    {
        return $this->belongsTo(Supplier::class);
    }

    public function location(): BelongsTo
    {
        return $this->belongsTo(Location::class);
    }

    public function items(): HasMany
    {
        return $this->hasMany(PurchaseOrderItem::class);
    }

    public function goodsReceipts(): HasMany
    {
        return $this->hasMany(GoodsReceipt::class);
    }

    public function creator(): BelongsTo
    {
        return $this->belongsTo(User::class, 'created_by');
    }
}