<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\BelongsToMany;
use Illuminate\Database\Eloquent\Relations\HasOne;
use Illuminate\Database\Eloquent\Relations\MorphMany;

class ProductVariant extends Model
{
    protected $fillable = [
        'product_id',
        'name_suffix',
        'is_master_variant',
        'sku',
        'han_mpn',
        'ean_gtin',
        'selling_price',
        'msrp',
        'purchase_price',
        'tax_rate_id',
        'stock_quantity',
        'stock_min_threshold',
        'availability_status',
        'delivery_time_text',
        'currency',
        'is_rentable',
        'rental_duration_options',
        'rental_rate_formula',
        'residual_value_percentage',
        'variant_weight_g',
        'is_active',
    ];

    protected function casts(): array
    {
        return [
            'is_master_variant' => 'boolean',
            'selling_price' => 'integer',
            'msrp' => 'integer',
            'purchase_price' => 'integer',
            'stock_quantity' => 'integer',
            'is_rentable' => 'boolean',
            'rental_duration_options' => 'array',
            'residual_value_percentage' => 'decimal:2',
            'is_active' => 'boolean',
        ];
    }

    /**
     * Gehört zu einem Produkt.
     */
    public function product(): BelongsTo
    {
        return $this->belongsTo(Product::class);
    }

    /**
     * Steuersatz der Variante.
     */
    public function taxRate(): BelongsTo
    {
        return $this->belongsTo(TaxRate::class);
    }

    /**
     * Attribut-Werte dieser Variante (z.B. Farbe: Rot, Größe: L).
     */
    public function attributeValues(): BelongsToMany
    {
        return $this->belongsToMany(AttributeValue::class, 'product_variant_attributes');
    }

    /**
     * Logistik-Daten der Variante (1:1).
     */
    public function logistics(): HasOne
    {
        return $this->hasOne(ProductLogistics::class);
    }

    /**
     * Bilder der Variante.
     */
    public function media(): MorphMany
    {
        return $this->morphMany(Media::class, 'model');
    }
}