<?php namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class InventoryMovement extends Model
{
    const UPDATED_AT = null;

    protected $fillable = [
        'inventory_id',
        'warehouse_from_id',
        'warehouse_to_id',
        'movement_type',
        'quantity',
        'unit_cost',
        'supplier_id',
        'reference_type',
        'reference_id',
        'user_id',
        'notes',
        'invoice_reference',
    ];

    protected $casts = [
        'quantity' => 'decimal:3',
        'unit_cost' => 'decimal:2',
        'created_at' => 'datetime',
    ];

    // Relaciones
    public function inventory() {
        return $this->belongsTo(Inventory::class);
    }

    public function supplier() {
        return $this->belongsTo(Supplier::class);
    }

    public function warehouseFrom() {
        return $this->belongsTo(Warehouse::class, 'warehouse_from_id');
    }

    public function warehouseTo() {
        return $this->belongsTo(Warehouse::class, 'warehouse_to_id');
    }

    public function user() {
        return $this->belongsTo(User::class);
    }

    public function serials() {
        return $this->hasMany(InventorySerial::class, 'movement_id');
    }

    // Relación polimórfica para la referencia
    public function reference() {
        return $this->morphTo();
    }

    // Scopes
    public function scopeByType($query, string $type) {
        return $query->where('movement_type', $type);
    }

    public function scopeEntry($query) {
        return $query->where('movement_type', 'entry');
    }

    public function scopeExit($query) {
        return $query->where('movement_type', 'exit');
    }

    public function scopeTransfer($query) {
        return $query->where('movement_type', 'transfer');
    }
}