<?php

namespace App\KommaApp\Shop\Products\ProductGroup;

use App\KommaApp\Images\Models\Image;
use App\KommaApp\Kms\Core\AbstractTranslatableModel;
use App\KommaApp\Kms\Core\HasImagesInterface;
use App\KommaApp\Shop\Categories\Kms\CategorizableInterface;
use App\KommaApp\Shop\Categories\Models\Category;
use App\KommaApp\Shop\Products\Product\Product;
use App\KommaApp\Shop\Products\ProductableInterface;
use App\KommaApp\Shop\Products\ProductComposite\ProductComposite;
use App\KommaApp\Shop\Products\ProductGroupBehaviour\ProductGroupBehaviour;
use App\KommaApp\Shop\Properties\Models\PropertizableInterface;
use App\KommaApp\Shop\Properties\Models\Property;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Database\Eloquent\Relations\MorphToMany;
use Laravel\Scout\Searchable;

/**
 * Groups products together (not like a product category)
 * to link behaviour.
 * 
 * Class ProductGroup
 *
 * @package App
 * @property-read \Illuminate\Database\Eloquent\Collection|\App\KommaApp\Shop\Categories\Models\Category[] $categories
 * @property-read \Illuminate\Database\Eloquent\Collection|\App\KommaApp\Shop\Products\ProductComposite\ProductComposite[] $composites
 * @property-read \Illuminate\Database\Eloquent\Collection|\App\KommaApp\Images\Models\Image[] $images
 * @property-read \App\KommaApp\Shop\Products\ProductGroupBehaviour\ProductGroupBehaviour $productGroupBehaviour
 * @property-read \Illuminate\Database\Eloquent\Collection|\App\KommaApp\Shop\Products\Product\Product[] $products
 * @property-read \App\KommaApp\Shop\Products\ProductGroup\ProductGroupTranslation $translation
 * @property-read \Illuminate\Database\Eloquent\Collection|\App\KommaApp\Shop\Products\ProductGroup\ProductGroupTranslation[] $translations
 * @mixin \Eloquent
 * @property int $id
 * @property int $active
 * @property string $title
 * @property int $product_group_behaviour_id
 * @property \Carbon\Carbon|null $created_at
 * @property \Carbon\Carbon|null $updated_at
 * @method static \Illuminate\Database\Eloquent\Builder|\App\KommaApp\Shop\Products\ProductGroup\ProductGroup whereActive($value)
 * @method static \Illuminate\Database\Eloquent\Builder|\App\KommaApp\Shop\Products\ProductGroup\ProductGroup whereCreatedAt($value)
 * @method static \Illuminate\Database\Eloquent\Builder|\App\KommaApp\Shop\Products\ProductGroup\ProductGroup whereId($value)
 * @method static \Illuminate\Database\Eloquent\Builder|\App\KommaApp\Shop\Products\ProductGroup\ProductGroup whereProductGroupBehaviourId($value)
 * @method static \Illuminate\Database\Eloquent\Builder|\App\KommaApp\Shop\Products\ProductGroup\ProductGroup whereTitle($value)
 * @method static \Illuminate\Database\Eloquent\Builder|\App\KommaApp\Shop\Products\ProductGroup\ProductGroup whereUpdatedAt($value)
 * @property-read \Illuminate\Database\Eloquent\Collection|\App\KommaApp\Shop\Properties\Models\Property[] $properties
 */
class ProductGroup extends AbstractTranslatableModel implements ProductableInterface, CategorizableInterface, PropertizableInterface, HasImagesInterface
{
    use Searchable;

    public function searchableAs()
    {
        return 'products_groups_index';
    }

    public function toSearchableArray()
    {
        return [
            'id' => $this->id,
            'title' => $this->title,
        ];
    }

    /*
    * Transient properties on Eloquent models
    * These are not saved to database.
    */
    public $thumbnail = false;

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

    public function productGroupBehaviour()
    {
        return $this->belongsTo(ProductGroupBehaviour::class);
    }

    public function products()
    {
        return $this->belongsToMany(Product::class);
    }

    public function composites()
    {
        return $this->belongsToMany(ProductComposite::class);
    }

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

    /**
     * Returns properties
     * Example key: color
     * Example value of key color: green
     *
     * @return MorphToMany
     */
    function properties(): MorphToMany
    {
        return $this->morphToMany(Property::class, 'propertizable');
    }


    /**
     * Get the images from the current user
     *
     * @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', '=', ProductGroup::class);
    }

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

    /**
     * Returns the lowest price possible for the group.
     * Also known as "entry price"
     *
     * @return float
     */
    public function getPrice(): float
    {
        /** @var ProductGroupBehaviour $behaviour */
        $behaviour = $this->productGroupBehaviour()->first();

        $price = 0;
        switch ($behaviour->title)
        {
            case 'and':
                $products = $this->products()->where('active', '=', '1')->get(['products.id', 'products.price']);
                $products->each(function(Product $product) use (&$price) {
                    $price += $product->price;
                });
                break;
            case 'or':
            case 'xor':
                /** @var Product $product */
                $product = $this->products()->where('active', '=', '1')->orderBy('products.price', 'asc')->first(['products.id', 'products.price']);
                if($product) $price += $product->getPrice();
                break;
            default:
                throw new \RuntimeException("The productgroup cannot handle behaviour '".$behaviour->title."' because it was not implemented");
        }

        return $price;
    }
}