<?php

namespace App\KommaApp\Shop\Products\Product;

use App\KommaApp\Documents\Kms\DocumentableInterface;
use App\KommaApp\Documents\Models\Document;
use App\KommaApp\Images\Models\Image;
use App\KommaApp\Kms\Core\AbstractTranslatableModel;
use App\KommaApp\Shop\Categories\Kms\CategorizableInterface;
use App\KommaApp\Shop\Categories\Models\Category;
use App\KommaApp\Shop\Discounts\DiscountableInterface;
use App\KommaApp\Shop\Discounts\Discount;
use App\KommaApp\Shop\Products\ProductGroup\ProductGroup;
use App\KommaApp\Sites\Models\Site;
use Illuminate\Database\Eloquent\Relations\BelongsToMany;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Database\Eloquent\Relations\MorphMany;
use Illuminate\Database\Eloquent\Relations\MorphToMany;
use App\KommaApp\Kms\Core\HasImagesInterface;

/**
 * Represents a basic product that a user can put in a cart
 *
 * Class Product
 * @property int id
 * @property int active
 * @property string title
 * @property float price
 * @property string stock_keeping_unit
 * @package App
 */
class Product extends AbstractTranslatableModel implements CategorizableInterface, DocumentableInterface, HasImagesInterface
{
    /*
    * Transient properties on Eloquent models
    * These are not saved to database.
    */
    public $thumbnail = false;

    /** @var Discount[] $discounts  */
    private $discounts = [];

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = ['title, active, price, stock_keeping_unit'];

    public function groups()
    {
        return $this->belongsToMany(ProductGroup::class);
    }

    /**
     * Get the images from the current product
     *
     * @return \Illuminate\Database\Eloquent\Relations\hasMany
     */
    public function images():HasMany
    {
        /**
         *
         * On the Image model is an MorphTo relation
         * By using a hasMany relation:
         * where the imageable_type is filled in with the KmsClass
         * And the imageable_id is set as the foreign_id,
         * we can collect the images of the given model directly.
         *
         */
        return $this->hasMany(Image::class, 'imageable_id')
            ->where('imageable_type', '=', Product::class);
    }


    /**
     * Get the documents from the current model
     *
     * @return \Illuminate\Database\Eloquent\Relations\MorphMany
     */
    public function documents():MorphMany
    {
        return $this->morphMany(Document::class, 'documentable');
    }

    /**
     * We belong to many categories
     *
     * @return MorphToMany
     */
    public function categories(): MorphToMany
    {
        return $this->morphToMany(Category::class, 'product_categorizable');
    }

    /**
     * We belong to many sites
     *
     * @return BelongsToMany
     */
    public function sites(): BelongsToMany
    {
        return $this->belongsToMany(Site::class);
    }

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

    /**
     * Price is in cents
     *
     * @return float
     */
    public function getTotal(): float
    {
        return $this->price;
    }

    public function getName(): string
    {
        return $this->title;
    }

    /**
     * Applies the discount to itself
     *
     * @param Discount $discount
     * @return DiscountableInterface
     */
    public function applyDiscount(Discount $discount): DiscountableInterface
    {
        $this->discounts = [];
    }
}