<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;

class StockTransfer extends Model
{
    public const STATUS_DRAFT = 'draft';
    public const STATUS_APPROVED = 'approved';
    public const STATUS_IN_TRANSIT = 'in_transit';
    public const STATUS_RECEIVED = 'received';
    public const STATUS_CANCELLED = 'cancelled';

    protected $fillable = [
        'transfer_number',
        'from_location_id',
        'to_location_id',
        'status',
        'notes',
        'created_by',
        'approved_by',
        'approved_at',
        'shipped_at',
        'received_at',
    ];

    protected function casts(): array
    {
        return [
            'approved_at' => 'datetime',
            'shipped_at' => 'datetime',
            'received_at' => 'datetime',
        ];
    }

    public function fromLocation(): BelongsTo
    {
        return $this->belongsTo(Location::class, 'from_location_id');
    }

    public function toLocation(): BelongsTo
    {
        return $this->belongsTo(Location::class, 'to_location_id');
    }

    public function items(): HasMany
    {
        return $this->hasMany(StockTransferItem::class);
    }

    public function creator(): BelongsTo
    {
        return $this->belongsTo(User::class, 'created_by');
    }

    public function approver(): BelongsTo
    {
        return $this->belongsTo(User::class, 'approved_by');
    }
}